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AUGUST 2010VOLUME 52NUMBER 8STORM DATAAND UNUSUAL WEATHER PHENOMENAWITH LATE REPORTS AND CORRECTIONSnoaaNATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATIONNATIONAL ENVIRONMENTAL SATELLITE, DATA AND INFORMATION SERVICENATIONAL CLIMATIC DATA CENTER, ASHEVILLE, NC

Cover: A wall of mud raced across Highway 395 near Dunmovin, CA on the afternoon of August 26thcarrying this tractor trailer about 500 feet down the wash. It came to rest against this culvert on an extinctrailroad line’s right of way. (Photo courtesy: California Highway Patrol/Officer Dennis Cleland)TABLE OF CONTENTSPageOutstanding Storm of the Month…....………………..........……..…………..…….……...….............4Storm Data and Unusual Weather Phenomena......…….…....…………...…...........….........................6Reference Notes.............……...........................……….........…..….….............................................548STORM DATA(ISSN 0039-1972)National Climatic Data CenterEditor: Joseph E. KraftAssistant Editor: Rhonda HerndonSTORM DATA is prepared, and distributed by the National Climatic Data Center (NCDC), NationalEnvironmental Satellite, Data and Information Service (NESDIS), National Oceanic and AtmosphericAdministration (NOAA).The Storm Data and Unusual Weather Phenomena narratives and Hurricane/Tropical Storm summaries areprepared by the National Weather Service. Monthly and annual statistics and summaries of tornado andlightning events resulting in deaths, injuries, and damage are compiled by the National Climatic Data Centerand the National Weather Service’s (NWS) Storm Prediction Center.STORM DATA contains all confirmed information on storms available to our staff at the time of publication.Late reports and corrections will be printed in each edition.Except for limited editing to correct grammatical errors, the data in Storm Data are published as received.Note: “None Reported” means that no severe weather occurred and “Not Received” means that no reportswere received for this region at the time of printing.Subscription, pricing, and ordering information is available from:NCDC Subscription Services310 State Route 956Building 300Rocket Center, WV 26726(866) 742-3322 Toll FreeThe editor of STORM DATA solicit your help in acquiring photographs (prints or slides; black and white, orcolor), maps, clippings, etc. of significant or severe weather events (past or present) for use in the“Outstanding Storms of the Month’’ section of STORM DATA. We request our subscribers or otherinterested persons to mail such items to:Storm DataNational Climatic Data Center151 Patton AvenueAsheville, NC 28801e-mail: storm.data@noaa.govAny such items received by the editor will be for use in STORM DATA only. Any other use will be with thepermission of the owner of said items. Materials will be returned if requested.This is an official publication of the National Oceanic and Atmospheric Administration and is compiled from informationreceived at the National Climatic Data Center Asheville, North Carolina 28801-5001.2Thomas R. KarlDirector,National Climatic Data Center

August 2010 - Confirmed TornadoesNumber of TornadoesEF0 EF1 EF2 EF3 EF4 EF5 Total37 15 1 1 1 0 55Miles0 100 200 400 600 800 1,000®EF SCALEEF0EF1EF2EF3EF4EF53

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, CentralALZ019-023-044Calhoun - Jefferson - Montgomery - Tuscaloosa01 0000CST 0 0 0.00K 375.0K Heat13An abnormally hot conditions occurred across Central Alabama during the month as the result of a strong ridge encompassingmuch of the eastern united States.Cherokee County1 SW Coloma 01 1510CST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree fell across Highway 9 at County Road 176.A thunderstorm developed, likely due to orographically enhanced lift, during the peak heating of the day toppling a tree. Note:The estimated wind gust of 50 knots is equivalent to 58 mph.Tallapoosa County1 ENE Bevelle 02 1417CST 0 0 3.00K 0.00K Thunderstorm Wind (60EG)Numerous trees toppled in and around Alexander City.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Shelby County2 SSE New Hope 02 1428CST 0 0 4.00K 0.00K Thunderstorm Wind (55EG)Several trees knocked down, some onto power lines along Parkview Circle and Indian Crest Drive.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lee County3 WNW Salem 02 1533CST 0 0 0.00K 0.00K Hail (1.00)Russell County1 W Phenix City 02 1615CST 0 0 2.50K 0.00K Thunderstorm Wind (55EG)A few trees were knocked down in the Phenix City area.A hot and very moist boundary layer resulted in the development of a moderately unstable air mass. The presence of a weaksynoptic boundary across southern Georgia north northwestward into northern Mississippi served to focus diurnally enhancedstorms. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Elmore County2 SE North Elmore 04 1320CST 0 0 5.50K 0.00K Thunderstorm Wind (55EG)Several trees were blown down and a breezeway was damaged near Edgewood Academy between Elmore and Wetumpka.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Barbour County4 SW Comer 04 1443CST 0 0 4.00K 0.00K Thunderstorm Wind (60EG)Several trees down, either snapped or bent over, along County Road 49 and Comer Loop. Lots of small branches in theroadway. Two trees fell onto power lines.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Pickens County2 W Pickensville 04 1845CST 0 0 1.50K 0.00K Thunderstorm Wind (55EG)A few trees were knocked down near the Alabama-Mississippi state line.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Fayette County3 NNW Bluff 04 2004CST 0 0 1.50K 0.00K Thunderstorm Wind (45EG)A few small trees and one large tree knocked down along Highways 107 and 43.Afternoon thunderstorms developed in a highly unstable air mass and continued until shortly after sunset. Note: The estimatedwind gust of 45 knots is equivalent to 52 mph.6

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, CentralMarion County1 W Hackleburg 05 1251CST 0 0 9.00K 0.00K Thunderstorm Wind (65EG)A barn was destroyed and two chicken houses damaged on Fincher Road. Several trees were toppled along County Road 345with numerous power outages.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Cherokee County2 NE Jamestown 05 1842CST 0 0 0.50K 0.00K Thunderstorm Wind (55EG)One tree knocked down along county Road 15.Strong surface heating of a very moist boundary layer supported strong instability during the afternoon hours. Lift wasenhanced in the higher elevations of northeast Alabama, while farther west, outflow boundaries moving into NorthwestAlabama helped to focus lift. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Shelby CountyMontevallo 06 1525CST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Power lines knocked down on White Street.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Tuscaloosa County1 E Englewood 06 1902CST 0 0 30.00K 0.00K Flash FloodAround two feet of water flowing over the roadway near the entrance of Shelton State Community College resulting in stalledcars.Late afternoon, slow moving thunderstorms developed as the result of very high instability initiated by afternoon heating.Lowndes County3 WSW Calhoun 08 1654CST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)Several trees were toppled along County Road 45 between Fort Deposit and Mount Willing.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lowndes County1 NE Ft Deposit 08 1655CST1735CST 0 0 1.50K 0.00K Heavy RainRain rates around 2 inches in an hour produced minor flooding on County Road 37 in a construction area with poor drainage.The flooded road was closed.Intense afternoon heating resulted in high instability and the development of isolated thunderstorms. In addition, little upperlevel flow resulted in very slow moving storms.Etowah County4 WNW Aurora 13 1445CST 0 0 60.00K 0.00K Thunderstorm Wind (60EG)Multiple trees uprooted with partial roof damage at a residence on Bluff Road. Chicken houses also damaged.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Blount County1 SE Snead 13 1505CST 0 0 1.50K 0.00K Thunderstorm Wind (55EG)Several trees down along Highway 278.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Blount County2 NNW Nector 13 1520CST 0 0 150.00K 0.00K LightningLightning struck a house resulting in a fire.Cherokee County1 E Congo 13 1530CST 0 0 150.00K 0.00K LightningLightning struck a house on County Road 77 resulting in a fire.Thunderstorms developed in an unstable atmosphere as the result of a moist boundary layer and diurnal heating.7

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, CentralShelby County2 SE Acton4 S New Hope14 0745CST0900CST 0 0 15.00K 0.00K Heavy RainMinor but widespread street flooding in parts of Alabaster and Pelham. Highway 52 and Applegate Parkway. Two point fiveinches of rain was measured in one hour in Alabaster.Jefferson County1 N Center Pt 14 1600CST1700CST 0 0 5.00K 0.00K Heavy RainNumerous streets had minor flooding resulting in several road closures throughout Center Point.Shelby County5 ENE Quito 14 1630CST 0 0 150.00K 0.00K LightningHouse sustained significant damage after being struck by lightning and catching fire.Storms developed early in the day in a tropical air mass along an outflow boundary left over from the previous days storms.Weak steering flow resulted slow moving storms.Jefferson County1 ESE Pleasant Grove 15 1610CST 0 0 8.00K 0.00K Thunderstorm Wind (55EG)A tree fell onto power lines along Fan Road resulting in widespread power outages.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Marion County1 N Hamilton 15 1735CST 0 0 9.00K 0.00K Thunderstorm Wind (60EG)One tree fell onto a vehicle and another fell across County Road 1.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Marion County1 N Hamilton 15 1740CST 0 0 1.00K 0.00K Thunderstorm Wind (55EG)A tree fell across the road near the intersection of Country Estates Drive and Rosedale Circle.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lamar County5 SSE Detroit 15 1755CST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees down along State Highway 17.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lamar County1 WSW Crews 15 1810CST 0 0 8.00K 0.00K Thunderstorm Wind (55EG)Trees and power lines down just West of town along Highway 278.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Walker County2 ENE Jasper 15 1810CST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)Numerous trees and power lines knocked down in and around Jasper.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lamar County1 NE Vernon 15 1825CST 0 0 15.00K 0.00K Thunderstorm Wind (60EG)Numerous trees were knocked down across the southern half of the County.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.8

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, CentralFayette County1 W Bluff 15 1830CST 0 0 5.00K 0.00K Thunderstorm Wind (60EG)Trees were knocked down along County Road 47.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Pickens County1 S Ethelsville 15 1915CST 0 0 5.00K 0.00K Thunderstorm Wind (60EG)Trees down along County Road 30.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Greene County5 SSE Union 15 2005CST 0 0 7.00K 0.00K Thunderstorm Wind (55EG)A tree fell onto a house along County Road 170.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Greene County4 NW Eutaw 15 2015CST 0 0 6.00K 0.00K Thunderstorm Wind (60EG)Trees were knocked down along and across Interstate 20 and 59, Highway 14, County Road 131 and Highway 20.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Sumter County2 SSW York Mallard Arpt 15 2045CST 0 0 0.50K 0.00K Thunderstorm Wind (55EG)A tree was knocked down on Highway 17 South of York.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Sumter County5 SW Siloam 15 2055CST 0 0 3.00K 0.00K Thunderstorm Wind (60EG)Several trees were knocked down along County Road 16.A very moist boundary layer coupled with abundant sunshine resulted in an unstable air mass. Numerous outflow boundariesfrom the previous days convection and a stalled frontal boundary helped to focus lift as diurnally enhanced pulse and multicellthunderstorms developed during the late afternoon hours. Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Cherokee County1 W Leesburg 16 2050CST 0 0 8.00K 0.00K Flash FloodSeveral road closures required in and around Leesburg, including County Road 44, due to high water.Training thunderstorms resulted in flooding in Cherokee County.Sumter County3 NNE Cuba 22 1315CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A few trees were blown down on County Road 27 near Interstate 20 and 59.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Autauga County3 NE Booth 22 1325CST 0 0 3.00K 0.00K Thunderstorm Wind (60EG)Several trees were knocked down along County Roads 57 and 81.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Macon County4 NNE Franklin 22 1425CST 0 0 5.00K 0.00K Thunderstorm Wind (65EG)Ten or more trees were blown down South and West of Liberty Park City.Surface dew points were in the 70s with dry air and weak flow aloft making conditions favorable for wet microbursts. Inaddition, a weak frontal boundary moved through Central Alabama helping to focus lift. Note: The estimated wind gust of 65knots is equivalent to 75 mph.9

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, NorthLawrence County1 W Wren 04 1850CST1900CST 0 0 8.00K 0.00K Thunderstorm Wind (56EG)Microburst winds snapped a very large branch approximately 8 to 10 inches in diameter from a large Oak tree. The treebranch fell on power lines breaking them. In addition, a fruit stand and storage shed was blown over.Daytime heating initiated isolated strong to severe thunderstorms over portions of northern Alabama during the late afternoonand evening hours. One storm over Lawrence county produced a severe microburst which caused some tree damage and otherstructural damage in the Wren community. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Limestone County2 E Athens 05 1400CST1410CST 0 0 12.00K 0.00K Thunderstorm Wind (52EG)Several trees and limbs were blown down on Cambridge Lane.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Limestone County2 SW French Mill 05 1415CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)A roof was reported blown off at a residence in the Southern Breeze neighborhood. Numerous additional reports of trees downand fences knocked down down in this neighborhood. Powerlines were knocked down at the intersection of Mooresvile road.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Limestone County2 WNW Capshaw 05 1430CST1435CST 0 0 0.50K 0.00K LightningA home was struck by lightning near the intersection of E Limestone road and Capshaw road on Lancelot Circle.Jackson CountyHollytree 05 1500CST1510CST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Two trees were blown down in the Holly Tree community.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Dekalb County2 ESE Moores Xrds 05 1505CST1515CST 0 0 20.00K 0.00K Thunderstorm Wind (56EG)Multiple trees were blown down causing power outages and blocked roadways on CR 72 in the Moores Crossroads community.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Colbert County1 S Sheffield 05 1850CST1855CST 0 0 30.00K 0.00K Thunderstorm Wind (56EG)Multiple trees and power outages were blown down across much of the area in Sheffield.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Colbert County5 N Crooked Oak 05 1900CST1910CST 0 0 20.00K 0.00K Thunderstorm Wind (56EG)Multiple trees were blown down in the New Bethel area.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.11

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, NorthColbert County1 N Spring Vly 05 1900CST1910CST 0 0 20.00K 0.00K Thunderstorm Wind (56EG)Multiple trees were blown down in the Spring Valley area on CR 57 and west of highway 43 south.Marshall County2 ENE Hyatt2 W HighpointTemperatures in the mid to upper 90s and strong instability fueled scattered showers and thunderstorms ahead of a weakboundary in northern Alabama. These strong to severe storms produced damaging wind gusts that caused some stucturaldamage and significant tree damage. Power was out for several hours for over 1200 customers in portions of Scottsboro. Note:The estimated wind gust of 56 knots is equivalent to 64 mph.06 1205CST1215CST 0 0 20.00K 0.00K Thunderstorm Wind (65EG)Numerous trees were blown down which caused some structural damage to homes or businesses between the 2000 and 2800block of Horton-Nixon Chapel Road.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Marshall County1 S Swearengin 06 1300CST1310CST 0 0 30.00K 0.00K Thunderstorm Wind (65EG)Numerous trees were blown down along a path from near the intersection of Wright Drive and Swearingin road through the3675 block of Swearingin road. A few of the trees were reported to be 2 feet inches in diameter. In addition, a chicken housewas flattened at the intersection of Rice road and Swearingin road within this path.Strong datime heating and a weak boundary pushing south through northern Alabama produced scattered strong to severeshowers and thunderstorms across northeastern Alabama. A few of these storms produced some damaging microbursts near theHorton and Grant communities. Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Cullman County1 NNE Good Hope 13 1435CST1445CST 0 0 8.00K 0.00K Thunderstorm Wind (52EG)Several trees were reported blown down in the Good Hope community.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cullman County3 E Wheat 13 1455CST1500CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds knocked four boats loose from their dock along Smith Lake on County Road 156. The winds proceededto knock down at least 10 large pine trees of 6-12 inch diameter about 1/4 mile further west at Mauldin's Point. Time estimatedby radar.A severe thunderstorm knocked trees and knocked boats loose from their dock on Smith Lake in Cullman County. Note: Theestimated wind gust of 56 knots is equivalent to 64 mph.Colbert County2 SE Red Rock 14 2033CST 0 0 0.50K 0.00K LightningLightning struck a house on highway 247 west of Tuscumbia.Isolated showers and thunderstorms developed in the evening hours, some of which produced frequent lightning. Lightningstruck a house on highway 247 west of Tuscumbia. No injuries were reported.ALZ001>004-006>007-016Colbert - Cullman - Franklin - Lauderdale - Lawrence - Madison - Morgan15 0000CST1600CST 0 0 0.00K 0.00K Excessive HeatHeat index values reached 110 to 115 degrees in northwest and north central Alabama, including the following counties:Madison, Morgan, Cullman, Limestone, Lawrence, Franklin and Lauderdale.12

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, NorthLauderdale CountyKillen 15 1525CST1535CST 0 0 2.00K 0.00K Thunderstorm Wind (43EG)Power lines were blown down in the Killen area.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Lauderdale CountyCenter Star 15 1525CST 0 0 3.00K 0.00K Thunderstorm Wind (43EG)Power lines were blown down in the Center Star community.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Lawrence County2 W Red Bank 15 1538CST1548CST 0 0 8.00K 0.00K Thunderstorm Wind (56EG)Trees were blown down across power lines on highway 101 at the south end of Wheeler Dam.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Limestone County2 WSW Wheeler Lake North 15 1541CST1551CST 0 0 8.00K 0.00K Thunderstorm Wind (56EG)Trees and power lines were blown down on Cox Road.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Limestone County2 WSW Wheeler Lake North 15 1541CST1551CST 0 0 8.00K 0.00K Thunderstorm Wind (56EG)Trees and power lines were blown down on Blue Springs Drive.A line of strong to severe thunderstorms pushed through northern Alabama during the afternoon hours. Fairly widespread winddamage occcurred, mainly west of interstate 65. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.ALZ001>007-016Colbert - Cullman - Franklin - Lauderdale - Lawrence - Limestone - Madison - Morgan15 1600CST 0 0 0.00K 0.00K Heat17Heat index values reached 105 to 109 degrees in the following counties:Madison, Lauderdale, Colbert, Franklin, Lawrence, Limestone, Cullman and Morgan.Morgan County1 W Oakworth 15 1605CST1615CST 0 0 16.00K 0.00K Thunderstorm Wind (56EG)Decatur police department reported multiple power lines and trees down, causing some traffic signals to go out. A street signwas also blown over on US 31 north.A line of strong to severe thunderstorms pushed through northern Alabama during the afternoon hours. Fairly widespread winddamage occcurred, mainly west of interstate 65. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Marshall CountyAlbertville 16 1850CST2050CST 0 0 0.00K 0.00K Flash FloodNumerous roads were covered with water in the city of Albertville. A few roads were covered in water so deep that barricadeshad to be put in place.Strong thunderstorms produced intense rainfall in localized areas of northeast Alabama during the late afternoon and earlyevening hours. Runoff caused flash flooding in the Albertville area during the early evening hours.13

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, NorthMadison County1 SE Mt Leventov 21 1915CST1925CST 0 0 4.00K 0.00K Thunderstorm Wind (43EG)A tree was blown down on a power line on Cornfield Lane west of Meridianville. Time was estimated from radar.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Madison County2 WNW Normal 21 1925CST1935CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A 100 foot locust tree was blown down near the intersection of Pulaski Pike and Winchester Road on power lines. This causedabout 1,000 Huntsville Utility customers to lose their power.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison CountyHuntsville 21 2040CST2050CST 0 0 0.00K 0.00K LightningA man working on a air conditioning unit was indirectly struck by lightning. He was transported to the hospital.Limestone County1 SW Athens 21 2150CST2200CST 0 0 4.00K 0.00K Thunderstorm Wind (43EG)Two trees were blown down at a residence along Schilling road. One tree fell on two cars at the residence causing significantdamage.Very hot and humid conditions developed during the afternoon hours on the 21st. As a result, numerous strong and a few severethunderstorms developed ahead of a cold front during the evening hours. One of the storms knocked trees down near the townsof Hazel Green and Meridianville. One man was indirectly struck by lightning while working on an air conditioning unit.Fortunately, his injuries were reportedly minor. Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Cullman County2 NNE Welti 27 1730CST1740CST 0 0 0.10K 0.00K Thunderstorm Wind (39EG)ALABAMA, SoutheastSmall tree limbs were blown down along CR 730 and CR 747 in the Welti community.Strong daytime heating produced isolated strong thunderstorms in Cullman county. One of these thunderstorms produced someminor tree damage near Cullman. Note: The estimated wind gust of 39 knots is equivalent to 45 mph.ALZ066-069Dale - Henry - Houston01 1500EST1600EST 0 0 0.00K 0.00K HeatHigh heat indices of 110 degrees or higher effected the Dothan area during the afternoon hours of August 1st and August 2nd.Houston CountyCottonwood 01 1604CST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Trees were blown down along with hail of unknown size. The monetary damage figure provided is a rough estimate.The tail end of a weak upper level trough coupled with an unstable air mass resulted in a severe storm during the late afternoonhours. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.ALZ066-069Dale - Henry - Houston02 1300EST1500EST 0 0 0.00K 0.00K HeatHigh heat indices of 110 degrees or higher effected the Dothan area during the afternoon hours of August 1st and August 2nd.15

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, SoutheastHouston CountyDothan 07 1320CST 0 0 2.00K 0.00K LightningA house was struck by lightning, which resulted in a hole in the roof and the loss of 4 to 5 shingles. The monetary damagefigure provided is a rough estimate.Afternoon thunderstorms developed with lightning striking a home in Dothan.Coffee County1 WSW Enterprise 22 1350CST 0 0 25.00K 0.00K LightningLightning struck the Coffee county District Attorney's office, causing significant computer damage with monetary lossesestimated at $25,000.Afternoon thunderstorms developed with a lightning strike hitting the District Attorney's office building in Coffee county.ALABAMA, SouthwestMonroe County3 W River Ridge 02 1531CST1533CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Winds estimated at 60 mph downed multiple power lines.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Monroe CountyVredenburgh 02 1608CST1708CST 0 0 0.00K 0.00K Flash FloodHeavy rain from thunderstorms producing flooding in area roadways. Several roadways had 2 to 3 inches of water flowingacross them.Thunderstorms with winds estimated at 60 mph downed multiple power lines. Heavy rains from the thunderstorms also causedflooding in parts of southwest Alabama.Baldwin CountyGulf Shrs 03 1030CST1031CST 0 2 0.00K 0.00K LightningLightning struck 4 people on the beach in Gulf Shores. Two were hospitalized with minor injuries.Lightning struck 4 people on the beach in Gulf Shores. Two were hospitalized with minor injuries.Washington CountyFrankville 03 1708CST1710CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Winds estimated at 60 mph downed several trees.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Washington County5 ENE Vinegar Bend 03 1813CST1815CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Scattered tree limbs down and one tree down due to thunderstorm wind gusts.Thunderstorms with winds estimated at 60 mph caused downed trees and power lines and also produced large hail in southwestAlabama. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Escambia CountyAppleton 04 1540CST1542CST 0 0 0.00K 0.00K Hail (1.00)Escambia CountyAppleton 04 1624CST1626CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Winds estimated at 60 mph downed power lines in Appleton.16

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ALABAMA, SouthwestThunderstorms produced gusty winds and hail that caused damage in southwest Alabama. Note: The estimated wind gust of 52knots is equivalent to 60 mph.Choctaw County1 SSW Pennington 05 1613CST1615CST 0 0 0.00K 0.00K Hail (1.25)Choctaw County1 SSW Pennington 05 1613CST1615CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The Public reported a wind gust estimated at 60 mph.Thunderstorms produced strong winds and hail across southwest Alabama. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Mobile CountyMobile 15 1630CST1730CST 0 0 0.00K 0.00K Flash FloodHeavy rain produced flooding in Downtown Mobile.ALASKA, NorthernUpr Tanana Vly FortymileChickenEagle05060300AKS0900AKS 0 0 0.00K 0.00K FloodAn area of low pressure moved out of the Gulf of Alaska and into the eastern interior of Alaska on August 6th. The low stalledout near the Alaska-Yukon border north of Eagle and produced heavy rainfall across parts of the Fortymile River Basin as wellas American Creek. One and one half to two and one half inches of rain fell during a 24 hour period from Chicken northwardto Eagle. The National Weather Service observer at O'Brien Creek recorded a peak stage of 71.3 feet, which tied the recordstage set back on July 11th, 2010. It is likely that American Creek, which is located just to the north and parallels the TaylorHighway, experienced a similar record peak stage. The heavy rain fell north of the southern portion of the Fortymile basin, andthe main stem of the Fortymile River at the Taylor Highway crested about 11 feet below the record stage of July 12th. Theheavy rainfall produced numerous rock slides and washouts north of Chicken.ALASKA, SouthernSusitna Valley40 N Hayes River28 N Puntilla05061500AKS1200AKS 0 0 0.00K 0.00K FloodHigh freezing levels combined with moderate rain in the Susitna Valley resulted in the Yentna River rising above flood stageAugust 5th. Rainfall in the Susitna Valley were 1 to 1.5 inches prior to the rising water.AKZ101Anchorage Muni to Bird Creek16181800AKS1830AKS 0 0 0.00K 0.00K High WindA strong front moved into south central Alaska August 16th. Strong wind in advance of the front blew from Potter Marsh andMcHugh Creek to the Anchorage Hillside. The peak measured wind was 72 mph at McHugh Creek. Power outages occurred inthe Anchorage area and small limbs broke and potted plants were blown around.Anchorage Muni To Bird Creek1 S Anchorage 28 2000AKS2200AKS 0 0 0.00K 0.00K FloodA one day record rainfall of 1.22 inches in Anchorage resulted in local streams rising to near flood stage. Chester Creekrecorded a stage of 19.58, 0.92 feet below flood stage, but withing the action stage. Local bike and walking paths experienceminor overflow in low lying portions of the trails.17

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, Central and NortheastNavajo County1 NNE Shongopovi1 NNW Polacca Arpt01 0200MST0400MST 0 0 0.00K 0.00K Flash FloodHeavy rain and flooding caused road closures along Highway 264 and Highway 87.Thunderstorms with heavy rain caused flooding in the Second Mesa area.Navajo County22 ENE White Mtn Lake 02 1700MST2000MST 0 0 0.00K 0.00K Heavy RainHeavy rain (2.60 inches in 3 hours) caused some damage to culverts in the area.Heavy rain fell in Concho and caused some culvert damage.Navajo County9 WNW Shonto 03 1700MST1800MST 0 0 0.00K 0.00K Flash FloodLaw enforcement officials reported flash flooding over Highway 160.Heavy rain in the Tsegi area caused flash flooding over Highway 160.Apache County2 W Many Farms 03 1710MST 0 0 0.00K 0.00K Funnel CloudNavajo Police Department observed a funnel cloud west of Many Farms.Apache County6 S Many Farms 03 1715MST1725MST 1 40 0 0 0.00K 0.00K Tornado (EF0)A land spout type tornado was confirmed via a photograph.A thunderstorm produced a land spout type tornado about 15 miles north of Chinle.Apache County10 WNW Canyon De Chelly9 SE Lukachukai Arpt03 2000MST2230MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding in and around the Wheatfields area. Roads were washed out in several areas and a bridge ortwo was washed out. Portions of Canyon de Chelly were evacuated as a precaution.Heavy rain caused flooding, washed out roads, and washed out bridges in the Wheatfields area.Coconino County4 S Page1 E (PGA)Page Arpt06 0001MST0400MST 0 0 0.00K 0.00K Flash FloodThe tour company at Antelope Canyon reported flash flooding in the canyon after midnight.Heavy rain caused flash flooding in Antelope Canyon during the night.Coconino County17 NNE Jacob Lake 08 1945MST2000MST 0 0 0.00K 0.00K Flash FloodThe Bureau of Land Management reported flash flooding along House Rock Road--the road was river of water. Coyote Washflooded over House Rock Road.18

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, Central and NortheastCoconino County20 NNE Jacob Lake 08 1955MST2005MST 0 0 0.00K 0.00K Hail (0.75)Penny sized hail was reported in the Buckskin Gulch and Coyote Buttes areas.Heavy rain from thunderstorms caused flash flooding in House Rock Valley.Coconino County2 SW Sunset Crater 16 1130MST1700MST 0 0 200.00K 0.00K Flash FloodHeavy rain over the Schultz Fire burn area caused flash flooding in the neighborhoods to the east. Several roads were floodedincluding Highway 89. There was a large debris flow though Siesta Wash making roads impassable. Berms that were made toredirect flood waters east of Highway 89 were temporarily breached.Thunderstorms over the Schultz Fire burned area caused flash flooding in the communities downhill and to the east.Coconino County6 NW Havasupai 16 1530MST1830MST 0 0 0.00K 0.00K Flash FloodA river gage on Havasu Creek showed a three foot rise.Heavy rain from a thunderstorm caused flash flooding in Havasu Canyon.Yavapai County4 W Bagdad Arpt6 SSE Bagdad17 1215MST1300MST 0 0 0.00K 0.00K Heavy RainAn observer in Bagdad reported 1.45 inches of rain in 45 minutes.Yavapai County1 W Bagdad 17 1610MST1730MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding across Highway 97 at Skunk Creek (MP 158) and Boulder Creek (MP 163).Thunderstorms produced heavy rain and flash flooding in the Bagdad area.Apache County1 NNW Cottonwood 18 1850MST2150MST 0 0 0.00K 0.00K Flash FloodHeavy rain and flooding made Route 4 impassable due to high water between mile marker 40 and 43.Thunderstorms produced heavy rain that lead to flash flooding in the Salina area.Navajo CountyPinon 18 2045MST2200MST 0 0 0.00K 0.00K Flash FloodThe Wepo Wash flooded near Pinon.Thunderstorms caused heavy rain and flash flooding in the Pinon area.Apache County8 S Adamana 23 1715MST 0 0 0.00K 0.00K Thunderstorm Wind (93MG)Damaging thunderstorm winds hit the Petrified Forest National Park. Stop signs were blown down and small trees weresnapped. A wind sensor measured a peak wind gust of 107 MPH.A thunderstorm produced damaging winds and small hail over central Apache Country. Note: The measured wind gust of 93knots is equivalent to 107 mph.19

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, Central and NortheastYavapai County1 N Bagdad 25 1600MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Winds from a thunderstorm knocked down large trees in Bagdad.Strong winds from a thunderstorm hit the Bagdad area. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Coconino County9 NNW Flagstaff7 NE Bellemont27 1545MST1736MST 0 0 0.00K 0.00K Heavy RainA thunderstorm produced 2.20 inches of rain at Hart Prairie Lodge at Arizona Snowbowl. Small hail accumulated to a dept ofone inch.Coconino County9 NE Bellemont 27 1610MST1700MST 0 0 0.00K 0.00K Flash FloodWater flowed over Snowbowl Road near the ski lodge. No significant damage was reported.A thunderstorm produced heavy rain and flash flooding over Snowbowl Road.ARIZONA, NorthwestMohave CountyPipe Spring 08 1451MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)An unseasonably deep Pacific trough interacted with monsoon moisture to produce scattered severe thunderstorms and flashflooding across the Mojave Desert. Note: The measured wind gust of 56 knots is equivalent to 64 mph.Mohave County3 SW Meadview 17 1500MST1600MST 0 0 10.00K 0.00K Flash FloodWater up to two and a half feet deep flowed across roads, washed out a driveway, and also took out several signs and shrubs. Arain gage nearby measured 2.76 inches of rain in one hour.Mohave County3 SSW Meadview 17 1500MST1510MST 0 0 20.00K 0.00K Thunderstorm Wind (52EG)A firefighter and a motel employee nearby both estimated 60 mph winds. A roof was torn off a mobile home, several powerlines were blown down, and a Joshua tree was blown down. Hail up to dime size also fell.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mohave County5 N Meadview 17 1650MST1930MST 0 0 5.00K 0.00K Flash FloodOver two feet of water flowed across Pierce Ferry Road.Monsoon moisture fueled scattered thunderstorms over the Mojave Desert. A few storms produced severe weather and flashflooding.Mohave County1 ENE Wikieup 24 1510MST1520MST 0 0 0.00K 0.00K Hail (0.88)Mohave County1 ENE Wikieup 24 1510MST1520MST 0 0 25.00K 0.00K Thunderstorm Wind (57EG)Winds estimated by ADOT at 60-70 mph blew down a shed, power lines, and several trees (which closed U.S. Highway 93 fora time).Note: The estimated wind gust of 57 knots is equivalent to 66 mph.20

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, NorthwestMohave CountyKingman 26 1415MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)Note: The measured wind gust of 54 knots is equivalent to 62 mph.Mohave County4 WNW Golden Valley 26 1445MST1530MST 0 0 0.00K 0.00K Flash FloodTen to eleven inches of water flowed down roadways in Golden Valley.Mohave CountyBullhead City 26 1527MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Mohave CountyOatman 26 1700MST1800MST 0 0 0.00K 0.00K Flash FloodOne and a quarter inches of rain fell in less than an hour, resulting in flooded roadways.Mohave CountyBullhead City 27 2000MST2010MST 0 0 20.00K 0.00K Thunderstorm Wind (60EG)Thunderstorm winds blew down power lines and blew awnings off several mobile homes.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Mohave County1 SSE Riviera 27 2027MST2030MST 0 0 0.00K 0.00K Hail (1.00)Mohave County1 WSW Riviera 27 2050MST2200MST 0 0 15.00K 0.00K Flash FloodFlash flooding closed several intersections in Bullhead City and washed debris onto roads as well. Five people were rescuedfrom swift water on Riverview Drive.Monsoon moisture fueled several rounds of thunderstorms over the Mojave Desert, with the greatest coverage of storms on the26th and 27th. Several storms produced severe weather and flash flooding.ARIZONA, SouthPima County4 NNW Sahuarita 05 1825MST 0 0 0.10K 0.00K Thunderstorm Wind (52EG)A 6 inch diameter tree was uprooted by microburst winds.Above average moisture fueled thunderstorm development across Southern Arizona. Thunderstorms produced locally heavyrainfall and gusty winds. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cochise County6 WSW Palominas 06 1736MST1739MST 0 0 0.00K 0.00K Hail (1.25)Nickel size hail began at 520 pm, eventually growing as large as 1.25 inches in diameter.Cochise County5 SSW Lewis Spgs3 WSW Palominas06 1830MST1930MST 0 0 0.00K 0.00K Flash FloodSeveral sections of Moson Road were covered in flood waters and debris. Spotter reported a rainfall total of 2.30 inches.Adequate moisture and southerly flow allowed for another day of thunderstorm activity. Heavy rainfall, flash flooding, andlarge hail occurred under the strongest storms.21

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthCochise County1 S Huachuca City Arpt5 WNW Huachca Vista07 2010MST2100MST 0 0 0.00K 0.00K Flash FloodFlood waters flowed across the right lane of Highway 90 north of Huachuca City.Cochise County2 SSE Fairbank3 WNW Palominas07 2120MST2220MST 0 0 0.00K 0.00K Flash FloodNumerous streets southeast of Sierra Vista were flooded. A spotter report of 2.45 inches of rain was received.Above average moisture and a thunderstorm complex from Sonora, Mexico helped set up a flash flood event across southwestCochise County.Pima County1 WSW Jaynes 15 1700MST1710MST 0 0 1.00K 0.00K Thunderstorm Wind (45EG)Thunderstorms developed and moved across southern portions of Tucson producing 50 mph winds at the Tucson InternationalAirport, but no damage was reported. Storms moved to the northwest through western portions of Tucson with an outflowracing out in advance. Damage occurred to six saguaro cacti, one which was over 35 feet tall, at El Camino De Cerro and theTucson Mountains. Tucson weather observation site CW8334, which is 5 miles southeast of the damage, recorded a wind gustof 42 mph at 5:09 pm. Based on damage and stronger velocities where the damage was reported, winds were estimated to beabout 50 mph.Pima County2 NNW Oro VlyTuscon Marana Nw AirportNote: The estimated wind gust of 45 knots is equivalent to 52 mph.15 1755MST1815MST 0 0 100.00K 0.00K Thunderstorm Wind (56EG)Local broadcast media reported up to 3 dozen trees damaged or uprooted in Rancho Vistoso neighborhood. A few ceramic rooftiles were also blown off homes. In addition, a NWS Employee reported several trees down in Dove Mountain with one treeleaning up against a home. There was only slight tile damage to the home. Also, local broadcast media reported trees andpower lines down in Marana at Interstate 10 and Marana/Trico Road as well as a roof ripped off a mobile home. The MaranaAirport also sustained damage. Two small airplanes were ripped from their tie down chains and were flipped over whileanother plane was blown into a field. A large hangar door was blown off its tracks and a few other hangars also sustained lightdamage. In the same area, several power poles and lines were downed on Twin Peaks Road east of N. Sandario Road.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Santa Cruz County1 SSW Elgin 15 1950MST2005MST 0 0 10.00K 75.00K Hail (1.75)An owner of a grape vineyard in Elgin reported hail for 15 minutes with the largest being golf ball size (1.75). Damage to thevineyard was extensive, with nearly all the 2010 grape crop lost. Crop losses at this one vineyard were estimated at six tonswhich translated to between 10 and 15 thousand dollars, ultimately resulting in a loss of wine valued at 100 to 150 thousanddollars. Extensive damage was also sustained at other vineyards in area. Hail also dented vehicles and broke their windows.Santa Cruz County1 SSW Elgin 15 1950MST2010MST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)This report goes along with thunderstorm which produced 1.75 inch diameter hail in Elgin. Just before and during the storm,the vineyard owner reported an estimate of at least 60 mph winds. Damage was limited to farm structures and not dwellings.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pima County3 E Sabino 15 2000MST2010MST 0 0 40.00K 0.00K Thunderstorm Wind (52EG)An isolated severe thunderstorm produced a downburst in the vicinity of Snyder Road and Houghton Road downing severalpower poles and lines.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.22

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthCochise County1 N Bisbee 15 2140MST 0 0 0.00K 0.00K Hail (0.75)Law enforcement reported penny size hail covering the ground at mule tunnel northwest of Bisbee.Cochise County3 SSE Fairbank3 NNE Tombstone Muni Arpt15 2149MST2300MST 0 0 10.00K 0.00K Flash FloodLaw Enforcement reported Brewery Gulch and several streets flooded in Old Town Bisbee and Banning Creek northwest ofBisbee also flooded. In addition, flooding damaged fiber-optic lines near Tombstone.A return to favorable monsoon conditions, including abundant moisture and a disturbance, brought strong thunderstorms andheavy rain to southern Arizona.Pima CountyAjo1 E GibsonPima County18 SW Ajo8 W Ajo Muni Arpt17 1330MST1340MST 0 0 Thunderstorm Wind (79MG)A trained weather spotter measured a thunderstorm wind gust of 91 mph and law enforcement estimated wind gusts of 70 mphin town, but no damage was reported in Ajo.Note: The measured wind gust of 79 knots is equivalent to 91 mph.17 1345MST1600MST 0 0 0.00K 0.00K Flash FloodA storm spotter reported that several streets in Ajo were beginning to flood as of 1:45 pm. Thereafter, at 2:47 pm a report fromlaw enforcement stated that all roads along the Gibson Wash were barricaded due to water over the road crossings. Theaffected road crossings included Rasmussen Road, 22nd Avenue, and Highway 85.High pressure located across southern New Mexico contributed to favorable southerly flow and abundant moisture. Thiscombined with a mesoscale convective vortex, resulting in an active afternoon and evening of thunderstorms that producedstrong winds and flash flooding, especially across western Pima County.Santa Cruz County1 SSW Nogales 21 1545MST1730MST 0 0 2.00K 0.00K Flash FloodVery heavy rain in Nogales, Sonora caused the Nogales Wash to rise 7 feet in less than one hour. The wash rose above floodstage, causing erosion to one roadway in Nogales, Arizona.Pima County7 W Peach Pu3 WNW Pisinimo21222015MST0100MST 0 0 0.00K 0.00K Flash FloodSan Simon Wash west of Pisinimo overflowed its banks, cresting at 8.3 feet, just above its 7 foot flood stage. A tributary, GuVo Wash, flooded Indian Road 28.Abundant moisture combined with a weak upper level disturbance to generate thunderstorms which produced very heavyrainfall.Cochise County1 NW Bakerville 23 1520MST 0 0 0.00K 0.00K Hail (0.75)Cochise County1 NW Bakerville1 S Naco23 1520MST1530MST 0 0 1.00K 0.00K Thunderstorm Wind (56EG)Several 75 to 100-year-old trees were uprooted in Bisbee and Naco.Abundant moisture and weak flow aloft led to thunderstorms producing very heavy rainfall and isolated microbursts. Note:The estimated wind gust of 56 knots is equivalent to 64 mph.23

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthPinal County7 SE Florence 24 1435MST 0 0 0.10K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed tree limbs.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pima County1 ESE Tucson 24 1500MST 0 0 0.50K 0.00K LightningLightning struck a palm tree at the Randolph Community Center. A fire was ignited, which spread to surrounding brush,prompting the evacuation of the center.Pima County4 S Sabino1 NNW Kino24 1500MST1530MST 0 0 85.00K 0.00K Thunderstorm Wind (55EG)Thunderstorms developed over eastern portions of the Tucson area around 2:30 pm MST. Storms slowly moved to the east ataround 5 to 10 mph dropping heavy rainfall and putting out thunderstorm winds in excess of 60 mph. The first reports ofdamage were received at 3 pm on the east side of Tucson. Several tree limbs were downed on Columbus Blvd, with a fewpower poles down on 6th street. At 3:09 pm, reports were received of several street signs down in the La Paloma Estates. By3:15 pm, reports were coming in from the media about several roofs damaged in eastern sections of Tucson. Also around 3:15pm, spotters reported several large trees downed in east Tucson, including trees down on 22nd St and Broadway Blvd. A largewas blown into an election polling station building near S. Alvernon and E. Benson Highways in southern Tucson.Pima County3 W Tuscon Ryan Fld Arpt3 E LittletownNote: The estimated wind gust of 55 knots is equivalent to 63 mph.24 1520MST1830MST 0 0 0.00K 0.00K Flash FloodThunderstorms produced heavy rain of up to 2 inches across portions of the Tucson metro area. Heavy rains resulted in avehicle stalling in rising water at the intersection of Tucson Blvd. and Elm Street at 3:20 pm. By 4:00 pm, numerous streetswere flooding near the University of Arizona campus in Tucson. Heavy rains falling near Ryan Field Airport resulted numerouswashes flooding into residential neighborhoods. At 6:00 pm, firefighters pulled an 11 year old boy out of Alamo Wash nearTucson Medical Center.Pinal County1 W Oracle 24 1522MST 0 0 100.00K 0.00K Thunderstorm Wind (52EG)Thunderstorms moving into Oracle resulted in trees and power lines downed across a roadway. The most extensive damagewas a roof blown off of a home located on Bonito Drive in Oracle.Pima County2 E Tucson1 NNW Tuscon Ryan Fld ArptNote: The estimated wind gust of 52 knots is equivalent to 60 mph.24 1600MST1655MST 0 0 15.00K 0.00K Thunderstorm Wind (55MG)Severe thunderstorms redeveloped over central Tucson, moved westward and generated high winds causing a car port tocollapse in midtown Tucson and a 63 mph wind gust to be recorded at Ryan Air Field.Cochise County2 NW Benson1 ESE PomereneNote: The measured wind gust of 55 knots is equivalent to 63 mph.24 1615MST1745MST 0 0 30.00K 0.00K Flash FloodThe Benson News-Sun reported that a man was pulled from a running wash after he attempted to drive through 2 feet ofrunning water on an adjacent street. The force of the water on the street carried his car into the wash and up against a concretewall. The driver then attempted to get out of the vehicle, but fell 10-15 feet down into the wash underneath his car. Fire crewswere able to quickly rescue the driver. He was escorted to the local hospital. City officials also reported numerous washesflooding neighborhood streets.Cochise County1 SE Benson 24 1615MST1700MST 0 0 50.00K 0.00K Lightning24

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthThe Benson News-Sun reported several lightning strikes causing damage and fires in and around Benson. The most extensivelightning damage was done to two motors at the waste water treatment facility. Lightning also damaged numeroustransformers.Cochise County1 E Benson 24 1615MST1700MST 0 0 1.00M 0.00K Thunderstorm Wind (61EG)The Benson News-Sun and a local city official reported extensive damage to much of the city of Benson from thunderstormactivity. The city official reported numerous mature and young trees uprooted, street signs bent or pulled completely out of theground, damage to dwellings from uprooted trees, small sheds and car ports were lifted and thrown 50-75 feet, and shingledamage to numerous homes. Also, property fences were knocked over, camper trailers were turned over, and numerous poweroutages. The newspaper added that one particular insurance provider received 40 claims from residents, mostly related to roofdamage. Additional information from the newspaper stated that at least 80 street signs had to be replaced. Extensive damagewas also done to the Turquoise Hills Golf Course where numerous large trees were downed and buildings damaged.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Cochise County4 NNW Huachca Vista 24 1705MST1720MST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Local Law Enforcement reported several trees and power lines down after thunderstorms moved through Whetstone.Graham County6 NE Ft Grant5 WNW TanqueNote: The estimated wind gust of 52 knots is equivalent to 60 mph.24 1815MST2000MST 0 0 10.00K 0.00K Flash FloodLocal law enforcement reported that Highway 191 between Safford and Interstate 10 had been closed due to flooding. At 7:00pm, a spotter located in southern portions of Safford reported that he had received just over 3 inches of rainfall and that amajority of surrounding roads were impassable due to street flooding. According to Thatcher Police, a few homes near theEastern Arizona College had water seep into their garages, one apartment suffered water damage, and the back room of a homeon Fourth Avenue had water running into it. Also, a home south of Safford reported flood damage, and the HighwayDepartment closed Safford/Bryce Road from Eighth Ave. to Bryce Eden Road due to flooding and debris. A vehicle alsostalled in running water on Quattro Cerros Road near the Artesia area south of Safford. Water was running through the vehicle,but two passengers were able to get out. There were also several other reports of washed out roads and drainage problems.Pima County4 NE Oro Vly 24 1815MST 0 0 100.00K 0.00K LightningAfter a majority of the thunderstorm activity had started to wind down, lightning struck a house in Oro Valley. The house thencaught fire causing extensive damage.Cochise County2 E Sunnyside4 ESE Palominas24 2200MST2300MST 0 0 0.00K 0.00K Flash FloodThunderstorms dropped heavy rain with amounts ranging from 1 inch up to 3.5 inches, causing numerous streets to flood inSierra Vista. In addition, the Hereford Road Bridge at the San Pedro River was closed due to flooding.A backdoor cold front acted on a warm and moist air mass to produce severe thunderstorms. Wet microbursts and flashflooding were the results.Cochise County2 WSW Naco7 SSW Sunnyside27 1445MST1600MST 0 0 0.00K 0.00K Flash FloodVery heavy rainfall fell across portions of southwest Cochise county, especially around the Sierra Vista and Hereford areas.The Department of Highways reported that several roads in Sierra Vista and Hereford had to be closed due to street flooding.In addition, several washes were flooding in the area.A deepening trough off the California coast allowed for an increase in moisture across southern Arizona. The increase inmoisture, as well as an MCV moving across the area, allowed for additional afternoon and evening thunderstorms.25

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthPima County3 E Casas Adobes 28 1445MST1500MST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Pima County5 S Littletown2 SE (TUS)Tucson Intl ArpThunderstorms developed over the Tucson metro area resulting in small hail and damaging winds up to 60 mph. Spottersreported trees down at Campbell Ave and Skyline Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.28 1500MST1700MST 0 0 0.00K 0.00K Flash FloodNearly stationary thunderstorms developed over southern portions of the Tucson metro causing very heavy rainfall. This heavyrainfall lead to road closures in South Tucson including the closure of Hughes Access Road at South County Club Road.Pima County4 ENE Tucson 28 1900MST2000MST 0 0 0.00K 0.00K Flash FloodVery heavy rainfall across portions of eastern Tucson brought flash flooding that resulted in a swift water rescue on the AlamoWash at Lee St and Alamo Ave.Pima County4 NE (DMA)Davis Monthan A 28 1900MST1920MST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)ARIZONA, SouthwestSpotters reported about five trees uprooted at Golf Links and Swan Road at the entrance to Davis-Monthan Air Force Base.City officials also reported numerous arching power line wires and tree fires throughout the east side of the city.A strong trough of low pressure moved into the western U.S. allowing for isolated severe thunderstorms across the region.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.AZZ023Greater Phoenix Area01240800MST1800MST 0 0 0.00K 0.00K Excessive HeatAlthough not as hot as July, the month of August was slightly hotter than the long term averages. The high temperature inPhoenix on the 5th reached 112 degrees, just two degrees shy of the daily record.AZZ028Central Deserts15 1830MST2000MST 0 0 0.00K Dust StormThunderstorms in southeast Arizona generated strong outflow winds which produced dense blowing dust across the southcentral deserts on the evening of the 15th.La Paz CountyWenden 17 1520MST1530MST 0 0 0.00K Thunderstorm Wind (50EG)Law enforcement officials reported that several power poles were blown down in the city of Wenden. The poles were downeddue to strong thunderstorm winds estimated to be in excess of 50kt.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.La Paz County4 NW Utting 17 1540MST1600MST 0 0 0.00K Thunderstorm Wind (50EG)A trained weather spotter reported several power poles downed about 5 miles southeast of Bouse. The poles were downed dueto strong thunderstorm outflow winds, estimated to be in excess of 50kt.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.26

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthwestLa Paz CountySalome2 NNE Wenden17 1630MST1900MST 0 0 5.00K 0.00K Flash FloodCounty officials reported that the Centennial and Salome washes were running very heavy between the towns of Wenden andSalome. The strong flow was a result of heavy rain generated from strong thunderstorms in eastern La Paz county.Strong thunderstorms generated damaging winds across portions of La Paz county on the afternoon of the 17th. Heavy rain fellas well which led to flooding of area washes such as Centennial wash near Wenden.Pinal County1 W Palm Spgs1 WSW Goldfield17 1715MST1845MST 0 0 50.00K 0.00K Flash FloodApache Junction police reported flooding across much of town. Many washes were running with some streets having 3 feet ofwater. A vehicle was swept away at Lost Dutchman Blvd and Ironwood. The occupants climbed onto the top of the vehiclebefore they were rescued.Pinal County1 NNW Apache Jct 17 1725MST1735MST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)A strong thunderstorm produced a wind gust to 61 mph, as reported by a trained weather spotter in Apache Junction. Nodamage was reported in association with the strong wind.Thunderstorms developed over the higher terrain and propagated toward the metro Phoenix area late in the afternoon. Note:The estimated wind gust of 53 knots is equivalent to 61 mph.Maricopa County2 S Apache Wells 17 1745MST1830MST 0 0 300.00K 0.00K Thunderstorm Wind (52EG)Considerable damage across a part of East Mesa. Several homes were damaged and numerous trees were uprooted. Theprimary area of damage was near MCKellips and Sossaman. One east Mesa resident had his 23 foot saguaro blown over bywinds estimated to be 60 mph. The strong winds also ripped off a replacement roof covering a detached garage; the roof cameto rest between the home and their swimming pool.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Maricopa County1 SE Harmony Villa 17 1745MST1800MST 0 0 2.00K 0.00K Thunderstorm Wind (60EG)An amateur radio operator in northeast Mesa reported an eight inch diameter tree blown down near Power and McDowellroads.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Maricopa County1 WNW Scottsdale 17 1745MST1800MST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)A large tree split and fell near a car at the Bashas parking lot near IndianSchool and Hayden in South Scottsdale.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Maricopa County1 NE Twin Knolls 17 1750MST1810MST 0 0 25.00K 0.00K Thunderstorm Wind (52EG)An amateur radio operator reported power poles blown down near University Avenue and Signal Butte road in western ApacheJunction. Microburst wind gusts were estimated to be approximately 60mph.A series of thunderstorms rolled through the area and at least one strong downburst was reported to have caused damage tohomes and took down power lines. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.27

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthwestPinal County2 SW Goldfield 17 1840MST 0 0 0.00K 0.00K Heavy RainSpotter reported 1.81 inches of rain in one hour. Other gauges in the area had similar amounts in a short time.Maricopa County2 NNW Hightown 17 1845MST1945MST 0 0 0.00K Heavy RainA trained spotter in the town of Chandler measured 1.30 inches of rainfall, most of which fell in a 30 minute period. Similaramounts of rain were reported by other spotters in Chandler and the east valley. The rainfall was sufficient to cause localflooding of streets, washes and low lying areas.Thunderstorms developed over the higher terrain and propagated toward the metro Phoenix area late in the afternoon.Pinal County4 WNW Florence 21 2045MST2230MST 0 0 0.00K 0.00K Heavy RainThunderstorms in the Florence area produced locally heavy rainfall, with rainfall rates in excess of 1.5 inches per hour. At2115MST the Pinal County sheriff reported running washes with water water covering highway 79 near Florence. In addition,flooding was reported along the Hunt highway.Pinal County5 SSE Magma 21 2052MST2133MST 0 0 0.00K 0.00K Heavy RainAZZ028Spotter reported 0.76 inches of rain fell in 40 minutes.Central Deserts21 2115MST 0 0 0.00K 0.00K Dust StormPinal County6 WNW Magma 21 2133MST2148MST 0 0 0.00K 0.00K Heavy RainSpotter reported heavy rain fall of 0.58 inches fell in 15 minutes.Pinal County3 NNE Bapchule 21 2138MST2208MST 0 0 0.00K 0.00K Heavy RainSpotter reported heavy rain of 0.97 inches fell in 30 minutes.Maricopa County1 E Tremaine 21 2156MST2300MST 0 0 0.00K 0.00K Heavy RainSpotters in Mesa and other East Valley locations reported torrential downpours and small hail. One spotter indicated 0.50inches of rain in 30 minutes.Maricopa County1 N Youngtown 21 2300MST2320MST 0 0 0.00K 0.00K Heavy RainSpotter reported heavy rain of 0.25 inches and gusty winds estimated to 40 mph.Thunderstorms began late afternoon and moved West starting out near Roosevelt Lake and moving into the East Valleydumping heavy rains and picking up dust to reduce visibilities. Multiple flood advisories, airport weather warnings (lightning),severe thunderstorm warnings and a dust storm warning were issued.28

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthwestLa Paz County25 N Wenden 24 1446MST1500MST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)A park ranger at the Alamo Lake State Park reported downburst winds of at least 60 mph. The strong winds resulted in manytree limbs downed.Strong thunderstorms produced heavy rain and damaging winds across portions of La Paz county, including the Alamo LakeRecreational Area, on the 24th. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Maricopa County7 NE Phoenix Deer Vly Arp 24 1545MST1700MST 0 0 0.00K Heavy RainA trained spotter reported very heavy rainfall near Dynamite and Cave Creek Roads, near the Cave Buttes Recreational Area.Rainfall was measured at 1.13 inches which fell in less than one hour; the heavy rain caused some street flooding.Strong thunderstorms generated locally heavy rainfall across portions of south central Arizona on August 24th. Rainfall wassufficient to cause some flooding of streets and washes.Maricopa County7 ENE Phoenix Deer Vly Arp 24 1630MST1700MST 0 0 50.00K 0.00K Thunderstorm Wind (70EG)Damaging thunderstorm microburst winds, estimated to be in excess of 70kt, caused damage to portions of the Mayo ClinicHospital.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Maricopa County7 N Scottsdale Muni 24 1644MST1700MST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Strong thunderstorm winds caused steel gates to be blown down; in addition there were reports of tree limbs 6 inches indiameter broken off and lying in the streets.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Maricopa County3 W Scottsdale Muni 24 1645MST1700MST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)Strong thunderstorms over Scottsdale generated microburst winds which toppled several power poles. Winds were estimated inexcess of 50kt.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Maricopa CountyMorristown 24 1710MST1730MST 0 0 40.00K 0.00K Thunderstorm Wind (50EG)APS, reported that power poles, and power lines, were downed near highway 60, approximately one mile east of highway 74 inthe town of Morristown. Downburst winds were estimated to be in excess of 50kt.Maricopa County2 SW Velda Rose Estates1 N BuckhornA series of strong thunderstorms produced damaging microburst winds over portions of south central Arizona, including thegreater Phoenix area, on August 24th. Strong winds caused damage to buildings, trees, and power poles. Note: The estimatedwind gust of 50 knots is equivalent to 58 mph.24 1740MST1840MST 0 0 0.00K Heavy RainA trained spotter in Mesa reported very heavy rainfall, with a rainfall rate nearly four inches per hour. The heavy rain producedstreet flooding, with water flowing over the curb.Strong thunderstorms generated locally heavy rainfall across portions of south central Arizona on August 24th. Rainfall wassufficient to cause some flooding of streets and washes.29

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthwestMaricopa County1 W Buckhorn 24 1750MST1810MST 0 0 20.00K 0.00K Thunderstorm Wind (65EG)Strong microburst winds blew the roof off of a mobile home in Mesa, near the intersection of University and Lindsey roads.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Pinal County2 WSW Bon 24 1750MST1800MST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported several power poles downed about 14 miles west of Casa Grande. The strong thunderstormmicroburst winds that downed the poles also generated dense blowing dust, lowering visibility to one quarter mile.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Yuma County9 ENE Aztec 24 1810MST1820MST 0 0 0.00K Thunderstorm Wind (60EG)A trained weather spotter reported that 2 semi-trucks were blown off of Interstate 8 about 6 miles west of Sentinel. The strongthunderstorm downburst winds were estimated to be in excess of 60 knots.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Maricopa County1 WSW El Mirage 24 1815MST1900MST 0 0 0.00K Thunderstorm Wind (75EG)A trained spotter reported multiple trees down along with extensive wind damage west of El Mirage, in the area betweenGreenway Road and Thunderbird, and 131st Avenue and Litchfield. In addition to trees blown over, limbs 6 inches in diameterand larger were blown off of trees. The damage was a result of microburst winds estimated to be in excess of 75kt. Emergencycrews were reported to be in the area.Note: The estimated wind gust of 75 knots is equivalent to 86 mph.Pinal County1 NW Coolidge 24 1845MST1900MST 0 0 50.00K 0.00K Thunderstorm Wind (60EG)A trained weather spotter reported numerous power poles downed in the town of Coolidge. Thunderstorm downburst windswere estimated to be in excess of 60kt.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Maricopa CountySentinel 24 1855MST1900MST 0 0 0.00K Hail (1.50)Yuma Daily Sun reported that motorists on Interstate 8 had hail damage to windows. The size and time of the apparentmicroburst were estimated. One woman had a minor injury due to the glass that blew in.A series of strong thunderstorms produced damaging microburst winds over portions of south central Arizona, including thegreater Phoenix area, on August 24th. Strong winds caused damage to buildings, trees, and power poles.Yuma County1 ESE Crane 26 1945MST 0 0 0.25K 0.00K Hail (0.50)Spotter reported hail estimated size 0.50 inches.Yuma County1 ESE Crane 26 1945MST 0 0 1.00M 0.00K Thunderstorm Wind (60EG)Spotter reports several houses damaged on May Street in Yuma. One house is uninhabitable. Most severe damage was near 23Avenue and 5th Street.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.30

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthwestYuma County(YUM)Yuma Intl Arpt 26 1945MST2000MST 0 0 100.00K 0.00K Thunderstorm Wind (62MG)A trained spotter reported a measured thunderstorm wind gust at 71 mph. The strong thunderstorm microburst winds damagedsome Palo Verde trees.Note: The measured wind gust of 62 knots is equivalent to 71 mph.Yuma County1 ESE Crane 26 1945MST 0 0 3.00M 0.00K Thunderstorm Wind (70EG)Zero visibility reported in rain along with gusty winds estimated at up to 80 mph. Damage was reported to homes andbusinesses with numerous trees uprooted. A huge pine tree fell on a house at the corner of 8th Avenue and 10th Street. Entirecarports were torn from their foundations. A roof on a home in the 1100 block of Appaloose Lane was completely torn off ofits rafters. The ceramic tiles on the top of the entrance to El Charro Cafe, 601 West 8th Street, were severely damaged. The roofof a self-serve car wash collapsed. There were several reports of car windshields broken due to flying debris. At the oldFoxworth Galbraith hardward store, entire structures collapsed and lay mangled on the ground where the outdoor lumbersdection had been.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Yuma CountyYuma 26 1945MST2030MST 0 0 1.00M Thunderstorm Wind (65EG)Several schools in the Yuma area, including Yuma High School, were damaged due to strong thunderstorm winds, and wereclosed on Friday August 27th. The old gym at Yuma High suffered roof damage, and shingles were blown off the roof ofCentennial Middle School. Pecan Grove Elementary and Carver Elementary schools also reported wind damage.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Yuma County1 SSW Yuma 26 1945MST2030MST 0 0 5.00M 0.00K Thunderstorm Wind (75EG)As reported in the Yuma Sun, the Garden Landscaping Company at 830 South Orange Avenue was mostly destroyed bythunderstorm microburst winds, estimated to be near 75 knots. Damage was also reported at the O.G. RV Resort. The YumaHigh School and Kofa High School sustained considerable wind and water damage.Note: The estimated wind gust of 75 knots is equivalent to 86 mph.Yuma County1 WSW Yuma 26 1945MST2030MST 0 0 500.00K 0.00K Thunderstorm Wind (60EG)About 30 power poles were snapped by strong microburst winds, estimated in excess of 60 kt. APS reported up to 16,660customers were without power at the height of the storm. Many of the poles were downed in the area bounded by Avenue B tothe west, 4th Avenue to the east, the Colorado River to the north, and 12th street to the south.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Yuma County1 WSW El Pueblecito 26 1955MST 0 0 0.25K 0.00K Hail (0.75)Spotter reported hail estimated size 0.75 inches.Yuma County1 WSW El Pueblecito 26 1958MST 0 0 500.00K 0.00K Thunderstorm Wind (60EG)Several trees fell onto cars at 16th Street and Ave B.Severe thunderstorms moved across parts of the city of Yuma, with damaging winds, large hail, and low visibilities due toheavy rain. Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Yuma County1 W Wellton 27 1645MST1655MST 0 0 0.00K Hail (1.00)Strong thunderstorms near Wellton produced quarter sized hail, as reported by Channel 13 in Yuma.31

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthwestYuma County8 ESE Yuma Proving Ground 27 1730MST1740MST 0 0 25.00K 0.00K Thunderstorm Wind (55MG)Strong thunderstorm downburst winds knocked down several power poles 8 miles east of the Yuma Proving Ground. Thewinds were measured at 55 kt. Locally heavy rain occurred with the storms; 0.70 inches of rain was measured.Strong thunderstorms developed across southwestern Arizona and affected the area from Wellton to Yuma. The stormsproduced large hail and damaging winds. Note: The measured wind gust of 55 knots is equivalent to 63 mph.Pinal County1 WNW Lirim 28 1530MST1545MST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported that power poles were blown down at the junction of the Casa Grande Highway, and north White andParker Road. Winds were estimated to be in excess of 50 kt.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Maricopa County6 W West Chandler 28 1740MST1750MST 0 0 0.00K Thunderstorm Wind (50EG)A trained spotter near South Mountain Park reported that multiple large tree limbs, at least 7 inches in diameter, were blowndown by strong thunderstorm winds estimated to be in excess of 50 kt.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Maricopa County3 SSE Sunnyslope 28 1755MST1800MST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported that power poles were blown down at 19th Avenue and Dunlap. The poles were downed bythunderstorm microburst winds estimated to be in excess of 50 kt.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Maricopa County1 WSW Sunnyslope 28 1755MST 0 0 10.00K 0.00K Thunderstorm Wind (60EG)Power poles were blown down at 19th Ave and Dunlap.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Maricopa County1 S Cactus 28 1800MST1845MST 0 0 0.00K 0.00K Heavy RainA trained spotter in Phoenix measured 1.24 inches of rainfall between 1800MST and 1845MST. The rain fell in the area near16th Street and Northern.Maricopa CountyPhoenix 28 1800MST1845MST 0 0 200.00K 0.00K Heavy RainStrong thunderstorms with extremely heavy rain led to mutiple collisions on Interstate 10 in downtown Phoenix during theafternoon hours on August 28. A total of 69 vehicles were involved in a series of crashes; one collision alone involved 35vehicles and spanned over 2 miles from 16th street to 7th street. Trained spotters reported visibilities below one quarter mile inheavy rain in downtown Phoenix, and it was low visibility in heavy rain that led to the collisions. Seven people were taken toarea hospitals and two were in serious condition. Fire officials medically evaluated at least 40 people.32

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthwestMaricopa County5 ESE Scottsdale Muni1 N Fountain HillsOn August 28, at approximately 6 pm, 69 cars were involved in multiple collisions on Interstate 10 indowntown Phoenix. Very heavy rain and visibility near zero miles led to the crashes. 7 people were injured,and there were no fatatilies. Photographer credit: David Wallace at the Arizona Republic.28 1810MST1855MST 0 0 0.00K Thunderstorm Wind (60EG)A trained spotter reported numerous large tree branches down on Shea Boulevard, partially blocking traffic. The trees limbswere downed by strong thunderstorm winds estimated to be in excess of 50 kt. In addition, there was minor flooding along Sheabetween 120th and 136th street. In Fountain Hills very strong winds blew trees down and blew tiles off roofs, according to theFountain Hills Times. Nearly every major street in Fountain Hills had tree limbs down, according to Ken Kurth.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Pinal County5 NW Lirim 28 1826MST1840MST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)An amateur radio operator reported six inch diameter trees blown down in south central Maricopa. A trained spotter alsoreported a couple tree limbs blown down near the town of Maricopa. Winds were estimated in excess of 50 kt.Pinal County3 SW Casa Blanca7 WNW LirimNote: The estimated wind gust of 50 knots is equivalent to 58 mph.28 1830MST2030MST 0 0 0.00K Heavy RainStrong thunderstorms produced locally heavy rainfall across portions of west central Pinal county, including the town ofMaricopa and the Ak-Chin Village. Radar and trained spotters indicated up to 3 inches of rain fell along the Santa Rosa andGreen washes, and several reports of curb-to-curb street flooding in Maricopa were received.Pinal County5 NW Lirim 28 1830MST1900MST 0 0 0.00K Thunderstorm Wind (50EG)Trained spotters reported that throughout Maricopa, over 13 power poles were blown down by thunderstorm microburst windestimated to be in excess of 60 kt. In addition, numerous buildings sustained roof damage and trees up to 10 inches in diameterwere blown over.Strong thunderstorms across south-central Arizona produced damaging winds, hail and extremely heavy rainfall. Heavy rainwith near zero visibility led to a massive traffic pileup in downtown Phoenix. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.33

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARIZONA, SouthwestGila County1 N Miami Gardens 29 1819MST1830MST 0 0 5.00K 0.00K Thunderstorm Wind (60EG)ARKANSAS, Central and North CentralThunderstorm microburst winds, estimated to be in excess of 60 knots, tore down the marquee sign from a pizza shop in thetown of Claypool.Strong thunderstorms with damaging winds affected portions of southern Gila county on the 29th. Locally heavy rainfall alsooccurred with these storms. Note: The estimated wind gust of 60 knots is equivalent to 69 mph.ARZ021-030>034-037>047-052>057-062>067-069Arkansas - Calhoun - Clark - Cleveland - Conway - Dallas - Desha - Drew - Faulkner - Garland - Grant -Hot Spring - Jefferson - Johnson - Lincoln - Logan - Lonoke - Monroe - Montgomery - Ouachita - Perry -Pike - Polk - Pope - Prairie - Pulaski - Saline - Scott - White - Woodruff - Yell01020000CST0300CST 0 0 HeatHot, humid weather prevailed in early August as high pressure aloft settled over Arkansas. Most reporting stations saw hightemperatures rise to 100 degrees or greater, with a few highs reaching 106 to 108 degrees. The only exceptions were some ofthe higher elevations. Heat indices climbed to 105 to 110 degrees across the north, with a few places seeing heat indices closeto 115. Over central and southern Arkansas, heat indices in the 112 to 117 range were common, and a few spots recorded heatindices near 120. A cold front pushed into Arkansas on the 5th and 6th, bringing scattered to numerous thunderstorms andputting a temporary end to the heat wave.Woodruff CountyCavell1 WSW Riverside01040000CST1230CST 0 0 0.00K 0.00K FloodThe Cache River at Patterson remained above flood stage until the afternoon of the 4th, after rising above flood stage in themiddle of July.Flooding persisted on the Cache River at Patterson into early August after the river rose above flood stage in the middle of July.ARZ065Desha01160000CST2359CST 0 0 0.00K 200.0K DroughtSevere drought conditions, which began in July, persisted through the middle of August in Desha County.ARZ016-025Independence - Jackson01031200CST1315CST 0 0 HeatARZ021-030>034-038>039-043>047-056>057-064>065-069Arkansas - Conway - Desha - Drew - Faulkner - Jefferson - Johnson - Lincoln - Logan - Lonoke - Monroe -Perry - Pope - Prairie - Pulaski - Saline - White - Woodruff - Yell02050300CST1800CST 1 0 Excessive HeatARZ003>007-012>015-023>024Baxter - Boone - Cleburne - Fulton - Izard - Marion - Newton - Searcy - Sharp - Stone - Van Buren02050600CST1000CST 0 0 HeatHot, humid weather prevailed in early August as high pressure aloft settled over Arkansas. Most reporting stations saw hightemperatures rise to 100 degrees or greater, with a few highs reaching 106 to 108 degrees. The only exceptions were some ofthe higher elevations. Heat indices climbed to 105 to 110 degrees across the north, with a few places seeing heat indices closeto 115. Over central and southern Arkansas, heat indices in the 112 to 117 range were common, and a few spots recorded heatindices near 120. A cold front pushed into Arkansas on the 5th and 6th, bringing scattered to numerous thunderstorms andputting a temporary end to the heat wave.34

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralPulaski County1 SSE Amboy1 SSE Levy02 1542CST1545CST 0 0 100.00K 0.00K Thunderstorm Wind (52EG)Several large trees were knocked down from the Amboy section of North Little Rock across the Levy area into the Park Hillneighborhood. Two of the trees fell on houses. One tree fell on two cars and knocked down a street light pole.Unusually hot, humid weather prevailed in early August. Late on the afternoon of the 2nd, an isolated severe storm developedalong an old frontal boundary. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Thunderstorm winds downed a large portion of a tree onto a house in the Levy section of North LittleRock (Pulaski County) on the afternoon of August 2nd. Photo by John Robinson, WCM, WFO Little Rock.ARZ016-025-042-053>055-062>063-066>068Bradley - Calhoun - Clark - Cleveland - Dallas - Garland - Grant - Hot Spring - Independence - Jackson -Ouachita03051315CST1800CST 0 0 Excessive HeatHot, humid weather prevailed in early August as high pressure aloft settled over Arkansas. Most reporting stations saw hightemperatures rise to 100 degrees or greater, with a few highs reaching 106 to 108 degrees. The only exceptions were some ofthe higher elevations. Heat indices climbed to 105 to 110 degrees across the north, with a few places seeing heat indices closeto 115. Over central and southern Arkansas, heat indices in the 112 to 117 range were common, and a few spots recorded heatindices near 120. A cold front pushed into Arkansas on the 5th and 6th, bringing scattered to numerous thunderstorms andputting a temporary end to the heat wave.Yell County2 SSW Stafford 05 1310CST 0 0 0.00K Hail (1.25)Yell County4 SSE Sills 05 1315CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pope County1 NNE Russellville 05 1335CST 0 0 20.00K 0.00K LightningSeveral transformers were damaged by lightning.Pope County1 NNE Russellville 05 1335CST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)Multiple trees and power lines were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.35

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralYell County1 W Waveland 05 1343CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Multiple trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Logan County4 ENE Blue Mtn 05 1410CST 0 0 0.00K Hail (1.00)Hail up to quarter size fell.Johnson County2 W Hickeytown 05 1430CST 0 0 0.00K Hail (1.50)Pope County1 WSW Augsburg 05 1432CST 0 0 0.00K Hail (1.75)Hail ranged from 1.25 inches to 1.75 inches in diameter.White County2 NE Stony Pt 05 1438CST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)Trees and power lines were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lonoke CountyWard 05 1445CST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)Pulaski County2 ENE Sylvan HillsSherwoodMany trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.05 1445CST1505CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)A few trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County1 E (LIT)Little Rock Ada 05 1500CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A large limb fell on a vehicle, breaking the back window.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Prairie CountyHickory Plains 05 1505CST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)A grain silo was blown over onto Arkansas Highway 38.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Prairie County1 NW Des Arc 05 1510CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Power lines were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski CountyGenevia 05 1515CST1700CST 0 0 1.00K 0.00K Flash FloodSeveral streets were under water.Lonoke County2 NNE Woodlawn 05 1515CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Many trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.36

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralCalhoun CountyHampton 05 1534CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Logan County2 WNW Glendale2 W Booneville Muni ArptTrees and a utility pole were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.05 1535CST1700CST 0 0 15.00K 0.00K Flash FloodWidespread flooding occurred in Booneville and Glendale.Monroe County2 WNW Dagmar 05 1535CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Many trees were blown down near Interstate 40.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Arkansas CountyStuttgart 05 1617CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Trees were blown down in downtown Stuttgart.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lincoln CountyGriffith Spgs 05 1650CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Faulkner CountyWooster 06 1200CST1315CST 0 0 0.00K 0.00K Heavy RainFaulkner County1 NNE Conway1 NW Conway Muni ArptRainfall measured 2.20 inches in an hour and 15 minutes.06 1345CST1500CST 0 0 150.00K 0.00K Flash FloodSeveral streets flooded in downtown Conway. Cars stalled in the high water, and water entered a few businesses.Faulkner County2 NNE Conway1 N Conway Muni Arpt06 1354CST1500CST 0 0 1.00K 0.00K Flash FloodSiebenmorgen Rd. had 4 to 6 inches of water flowing across it.Pulaski County2 S Gibson 06 1425CST 0 0 150.00K 0.00K LightningLightning struck a house on Loop Rd. in Sherwood, setting it on fire. The same house had been damaged by a tornado on April3, 2008.37

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralA fire was started by lightning at this home in Sherwood (Pulaski County) on the afternoon of August6th. The photo is courtesy of Michael Hook.Jefferson County1 ENE Altheimer 07 0635CST0745CST 0 0 1.00K 0.00K Flash FloodStreet flooding occurred in Altheimer.Desha County1 W Watson 07 0900CST1030CST 0 0 1.00K 0.00K Flash FloodStreet flooding occurred in Watson.A cold front moved into Arkansas from the north on the 5th, triggering scattered to numerous showers and thunderstorms.Some of the storms became severe and produced locally heavy rain. The remnants of the front continued to touch off stormsfrom the 6th through the 8th, although the storms were less numerous on these days.ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069Arkansas - Baxter - Boone - Bradley - Calhoun - Clark - Cleburne - Cleveland - Conway - Dallas - Desha -Drew - Faulkner - Fulton - Garland - Grant - Hot Spring - Independence - Izard - Jackson - Jefferson -Johnson - Lincoln - Logan - Lonoke - Marion - Monroe - Montgomery - Newton - Ouachita - Perry - Pike -Polk - Pope - Prairie - Pulaski - Saline - Scott - Searcy - Sharp - Stone - Van Buren - White - Woodruff -Yell08151100CST1800CST 1 3 HeatAfter a brief break in the heat, high pressure built back into the area, with a new heat wave beginning on the 8th. At the start ofthe heat wave, most high temperatures ranged from the mid 90s to around 100. By the time the heat wave peaked on the 14th,most highs ranged from the upper 90s to 108. Throughout the heat wave, heat indices ranged from 105 to 115 in most locations,but a few spots reached the 116 to 119 range. The passage of a cold front on the 15th and 16th brought temperatures down, withmost areas dropping back close to normal for mid-August.Pulaski County1 N Little Rock 08 1430CST 0 0 75.00K 0.00K LightningLightning stuck Little Rock's central communications center, disabling phone equipment for 911 and 311, some police radiochannels, and the city's business phone lines and voice mail system. It took about 2 1/2 hours to restore the radio channels and 6hours to restore 911. Some of the other repairs took as long as 2 days.A cold front moved into Arkansas from the north on the 5th, triggering scattered to numerous showers and thunderstorms.Some of the storms became severe and produced locally heavy rain. The remnants of the front continued to touch off stormsfrom the 6th through the 8th, although the storms were less numerous on these days.38

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralWoodruff County1 NW Wiville 10 1245CST1345CST 0 0 1.00K 0.00K Flash FloodArkansas Highway 17 flooded in Wiville.White CountyRose Bud 10 1300CST1400CST 0 0 5.00K 0.00K Flash FloodA convenience store flooded in Rose Bud.Pulaski County1 S Sherwood 10 1347CST 0 0 30.00K 0.00K LightningLightning struck a house on Dyson Dr. in Sherwood. The lightning bolt went through the roof and into a wall inside the house,blowing drywall out into the room and setting the wall on fire.Fulton County2 E Shady Grove1 WSW Salem10 1350CST1500CST 0 0 1.00K 0.00K Flash FloodByron Rd. flooded southwest of Salem.Pulaski County1 ENE Levy 10 1355CST1445CST 0 0 0.00K 0.00K Flash FloodStreet flooding occurred in North Little Rock.Lonoke County2 SW Parnell 10 1425CST 0 0 150.00K 0.00K LightningLightning struck a house on Poppy Lane. The resulting fire destroyed the two-story house.Faulkner County1 N Greenbrier 10 1430CST1530CST 0 0 1.00K 0.00K Flash FloodStreet flooding occurred in Greenbrier.Lonoke County2 W Cabot 10 1440CST1540CST 0 0 1.00K 0.00K Flash FloodThe intersection of Arkansas Highway 5 and U.S. Highway 67/167 flooded.Lonoke County1 ENE Lonoke 10 1445CST1630CST 0 0 2.00K 0.00K Flash FloodStreets were flooded in Lonoke.Lonoke County2 ENE South Bend 10 1445CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down, blocking Arkansas Highway 236.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cleveland County1 E Unionville 10 1630CST1800CST 0 0 1.00K 0.00K Flash FloodArkansas Highway 133 flooded.39

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralPolk CountyWickes 11 1200CST 0 0 10.00K 0.00K LightningLightning set fire to a transformer.Polk County1 W Hatton 11 1215CST1345CST 0 0 2.00K 0.00K Flash FloodFlooding occurred on U.S. Highway 71 between Hatton and Wickes.Garland County1 S Lena 11 1300CST 0 0 0.00K Hail (1.00)Van Buren County1 NW Damascus 11 1425CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Large limbs were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sharp County5 NE Hardy 12 1310CST 0 0 0.00K 0.00K Hail (0.75)Sharp County5 NE Hardy 12 1310CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Large limbs were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pope CountyScottsville 13 1615CST 0 0 60.00K 0.00K Thunderstorm Wind (56EG)Trees, power poles, and power lines were blown down. One of the trees fell on a house. Arkansas Highway 27 was blocked forseveral hours.Unusually hot weather combined with high humidities to spark afternoon and evening storms on the 10th through the 13th. Afew of the storms became severe with large hail and damaging winds. High atmospheric moisture content contributed tolocalized flash flooding. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Montgomery County2 NNE Sims 15 1624CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Garland County1 SSE Bear2 SW RoyalGarland County1 SSE Bear2 SW RoyalSeveral trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.15 1641CST 0 0 0.00K Hail (1.00)15 1641CST 0 0 20.00K 0.00K Thunderstorm Wind (52EG)Trees and power lines were blown down, with some of them blocking roads. Some outbuildings had tin peeled off their roofs.An empty 53-foot trailer had its roof peeled off and was blown over. A billboard was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Scott CountyHarvey 15 1715CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Polk County1 WNW Rich Mtn 15 1720CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Multiple trees were blown down at Queen Wilhelmina State Park.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.40

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralPolk County2 NNW Acorn 15 1730CST1830CST 0 0 0.00K 0.00K Flash FloodStreet flooding occurred on U.S. Highway 270.Ouachita County4 SSE Lester 15 2012CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A tree was blown down on Arkansas Highway 24.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ouachita County1 WNW Camden 15 2035CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A tree was blown down in Camden.A cold front moved into Arkansas on the 14th, triggering scattered thunderstorms. A few of the storms became severe inwestern and southern parts of the state. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.ARZ021-030>034-037>047-052>057-062>069Arkansas - Bradley - Calhoun - Clark - Cleveland - Conway - Dallas - Desha - Drew - Faulkner - Garland -Grant - Hot Spring - Jefferson - Johnson - Lincoln - Logan - Lonoke - Monroe - Montgomery - Ouachita -Perry - Pike - Polk - Pope - Prairie - Pulaski - Saline - Scott - White - Woodruff - Yell19221000CST1800CST 0 0 HeatARZ003>007-012>016-023>025Baxter - Boone - Cleburne - Fulton - Independence - Izard - Jackson - Marion - Newton - Searcy - Sharp -Stone - Van Buren21 1000CST1800CST 0 0 HeatThe respite from the heat and humidity following the passage of the cold front on the 15th and 16th did not last long. The thirdheat wave of the month began on the 19th, with heat indices again reaching the 105 to 115 degree range. The passage of a coldfront on the 22nd brought temperatures down somewhat.Saline CountyAvilla 21 1440CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Searcy County1 SW Jameson 21 1515CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Saline County2 SW SalemBentonTrees were blown down on U.S. Highway 65 west of Marshall.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.21 1525CST 0 0 75.00K 0.00K Thunderstorm Wind (56EG)Multiple trees and some power lines were blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Stone CountyTimbo 21 1544CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Several trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Grant CountyBelfast 21 1556CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.41

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralIzard County1 S Mt Pleasant 21 1623CST 0 0 0.00K Hail (1.00)Izard County1 S Mt Pleasant 21 1623CST 0 0 0.00K Thunderstorm Wind (52EG)A wind gust estimated at 60 mph occurred.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Stone County2 WNW St James 21 1630CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Trees were blown down on Arkansas Highway 14 west of Pleasant Grove.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Independence CountyBatesville 21 1704CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County1 WNW (ORK)No Little Rock Ap 21 2101CST 0 0 40.00K 0.00K Thunderstorm Wind (56EG)Damage occurred at the North Little Rock airport. At the administration building, a long canopy over the sidewalk was blownaway and the flagpole was bent. Several hangar doors were knocked off their tracks.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Thunderstorm winds caused damage at the North Little Rock Airport during the evening of August 21st.A long canopy over the sidewalk at the administration building was blown away and the flagpole was bent.Photo by John Robinson, WCM, WFO Little Rock.Pulaski County1 WSW Jacksonville 21 2103CST 0 0 25.00K 0.00K Thunderstorm Wind (55MG)A trained spotter measured a wind gust of 63 mph in Jacksonville. Much of the roof of a dry cleaning and alteration businesswas blown off.Note: The measured wind gust of 55 knots is equivalent to 63 mph.42

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralThunderstorm winds removed much of the roof of a dry cleaning and alterations business in Jacksonville(Pulaski County) during the evening of August 21st. Photo by John Robinson, WCM, WFO Little Rock.Pulaski County2 SE Galloway 21 2114CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Trees were blown down on U.S Highway 70 southeast of Galloway.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County3 SW Scott 21 2139CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Several trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County5 S Scott 21 2140CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County4 SW Scott 21 2140CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Trees were blown down. Lower Steele Bend Rd. was still blocked by fallen trees 12 hours after the storm moved through.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County4 SSW Scott 21 2140CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Several trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County4 SSW Scott 21 2140CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down.The approach of a cold front on the 21st triggered thunderstorms in northern and central Arkansas. Some of these stormsbecame severe, causing wind damage. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.ARZ005Baxter24 1230CST1330CST 0 0 60.0K 0.00K Wildfire43

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, Central and North CentralA small wildfire destroyed property in Baxter County northwest of Mountain Home.ARKANSAS, EastARZ058Phillips01310000CST2359CST 0 0 0.00K DroughtBelow normal rainfall continued during the month of August which also continued severe (D2) drought conditions acrossportions of East-Central Arkansas. The biggest impact from the drought was on agriculture as many crops suffered due to thelack of rainfall. Burn bans were issued as a result of the dry weather.ARZ035-048>049-058Crittenden - Cross - Lee - Phillips - St. Francis01050900CST1800CST 0 0 0.00K 0.00K Excessive HeatARZ026>028Craighead - Mississippi - Poinsett01020900CST 0 0 0.00K 0.00K Heat02050900CST1800CST 0 0 0.00K 0.00K Excessive HeatARZ027-028Mississippi - Poinsett02050900CST1800CST 0 0 0.00K 0.00K Excessive HeatARZ008-017>018Clay - Greene - Lawrence - Randolph02030900CST 0 0 0.00K 0.00K Heat03050900CST1800CST 0 0 0.00K 0.00K Excessive HeatARZ009-017-018Clay - Greene - Lawrence03050900CST1800CST 0 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing from the end of July into the beginningof August. The upper ridge of high pressure produced above normal temperatures over the area. The combination of highhumidity and above normal temperatures produced brutal heat indices of 105-120 degrees.ARZ035-048>049-058ARZ008-017>018-026>028-035>036-048>049-058Crittenden - Cross - Lee - Phillips - St. Francis08090900CST 0 0 0.00K 0.00K HeatClay - Craighead - Crittenden - Cross - Greene - Lawrence - Lee - Mississippi - Phillips - Poinsett -Randolph - St. Francis09150900CST1800CST 0 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing into the middle of August. The upperridge of high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced brutal heat indices of 105-120 degrees.ARZ058Phillips19210900CST1800CST 0 0 0.00K 0.00K Excessive Heat44

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, EastARZ008-017>018-026>028-035>036-048>049ARZ026>028-035>036-048>049Clay - Craighead - Crittenden - Cross - Greene - Lawrence - Lee - Mississippi - Poinsett - Randolph - St.Francis19210900CST 0 0 0.00K 0.00K HeatCraighead - Crittenden - Cross - Lee - Mississippi - Poinsett - St. Francis21 0900CST1800CST 1 0 0.00K 0.00K Excessive HeatARZ035-048>049-058Crittenden - Cross - Lee - Phillips - St. Francis21 1800CST 0 0 0.00K 0.00K Heat22An upper level ridge of high pressure remained over the Mid-South during the middle to latter part of August. The upper ridgeof high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced high heat indices of 105-115 degrees. One death occurred as a result of the heat.ARKANSAS, NorthwestARZ019-029Crawford - Franklin - Sebastian01060000CST2000CST 0 0 0.00K 0.00K Excessive HeatA strong subtropical high pressure system reestablished itself over the south central United States during the end of July andthis pattern persisted through the first several days of August. Exceptionally hot weather was the result with above normaldaytime temperatures of 102 to 107 degrees, which combined with high humidity resulted in 110 to 115 degree heat indexvalues. Little relief was felt at night as temperatures only fell to near 80 degrees during the overnight hours.Benton County1 WNW Decatur 01 1613CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Strong thunderstorm wind blew off the roof of an unoccupied mobile home and blew down trees.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Benton County1 NW Decatur 01 1625CST 0 0 20.00K 0.00K Thunderstorm Wind (56EG)Strong thunderstorm wind damaged several homes, blew down trees, and destroyed a barn.Thunderstorms developed along and to the north of a stationary frontal boundary extending across the area. Some of thethunderstorms produced damaging winds. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.ARZ019-029Crawford - Franklin - Sebastian08150600CST2000CST 0 1 0.00K 0.00K Excessive HeatA strong subtropical high pressure system reestablished itself over the south central and southeastern United States during theAugust 8th through 15th timeframe. Exceptionally hot weather was the result with above normal daytime temperatures of 100to 105 degrees, which combined with high humidity resulted in 105 to 115 degree heat index values. Little relief was felt atnight as temperatures only fell to near 80 degrees during the overnight hours.ARZ001Benton13 0900CST1900CST 1 0 0.00K 0.00K HeatExceptionally hot weather occurred across northwest Arkansas as high temperatures near 100 degrees combined with highhumidity values to result in heat index values in the 105 to 110 degree range. A young child died when she was accidentally leftin a vehicle for several hours in Bentonville. F1VE45

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, NorthwestARZ019-029Crawford - Franklin - Sebastian19221200CST1800CST 0 0 0.00K 0.00K Excessive HeatA strong subtropical high pressure system reestablished itself over the south central United States during the August 19ththrough 22nd timeframe. Exceptionally hot weather was the result with above normal daytime temperatures of 99 to 102degrees, which combined with high humidity resulted in 105 to 110 degree heat index values. Little relief was felt at night astemperatures only fell to near 80 degrees during the overnight hours.ARKANSAS, SoutheastARZ074-075Ashley - Chicot01040000CST2000CST 0 0 0.00K 0.00K Excessive HeatA four day stretch of extreme temperatures occurred across the region to start off the month of August. High pressure wasfirmly entrenched across the southeast and allowed temperatures to soar into the triple digits across much of Arkansas. Acrossthe NWS Jackson, MS forecast area, 19 record highs were set between August 1st and 4th. Additionally, relatively highhumidity levels made conditions even more oppressive, with heat index readings surpassing 110 degrees in many areas.01310000CST2359CST 0 0 0.00K 300.0K DroughtDrought conditions for August 10, 2010.ARZ075Chicot01310000CST2359CST 0 0 0.00K 300.0K DroughtVery dry conditions continued across southeast portions of Arkansas during August. The dry stretch resulted in severe (D2)drought conditions continuing across parts of the southeast Arkansas despite a few locations receiving above normal rainfall forthe month. Crops were put under more stress from the hot and dry conditions. The likely impact will be less crop yields whenharvest arrives in early Fall.Ashley County2 SSW Lake Georgia Pacific 22 1520CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Two trees were blown down northwest of West Crossett.The combination of a weak front, strong upper disturbance, and daytime heating, increased instability and brought a round ofsevere storms to the region on the afternoon and evening of August 22. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.46

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, SouthwestMiller County2 NE Texarkana 06 1449CST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)Measured wind gust from the Texarkana airport.Note: The measured wind gust of 55 knots is equivalent to 63 mph.Miller County2 NE Texarkana 06 1500CST 0 0 40.00K 0.00K LightningTwo apartment complexes caught fire due to a lightning strike. These included the Quall Creek and Beacon Point apartments.A very tropical like airmass resided across the four state region during the afternoon and evening hours of August 6th. A weakfrontal boundary was stalled across northern Texas into southern Arkansas. This combined with a weak disturbance aloft toproduce showers and thunderstorms in a very unstable environment. Storms that developed were prolific lightning producersand as they decayed, produced strong and damaging wind gusts along with some small hail.Columbia County4 W Chalybeat Spgs 07 1400CST 0 1 75.00K 0.00K LightningLightning struck a container at the Key Energy Services Salt Water Disposal Plant about one mile north of the Louisiana stateline in extreme southern Columbia County, Arkansas. This lightning strike set off an explosion and fire from nine tanks. Theexplosion and fire injured the operator on duty at the facility. He was taken to Magnolia Regional Medical Center with onlyminor injuries. The facility was a total loss.Strong thunderstorms developed during the afternoon of August 7th across portions of Southwest Arkansas. These stormsproduced prolific cloud to ground lightning strikes, one of which destroyed a Salt Water Disposal Plant in the extreme southernpart of Columbia County, Arkansas.Nevada CountyPrescott 15 1830CST 0 0 5.00K 0.00K LightningA lightning strike resulted in a fire that torched nearly 100 acres of timberland near the town of Prescott, Arkansas.Nevada County1 E Dian 15 1830CST 0 0 30.00K 0.00K Thunderstorm Wind (54EG)Trees and powerlines were downed in Prescott, Arkansas. There were approximately 5 structures with roof damage in town.One structure that received damage was the County Jail when a one-ton air conditioning unit was almost blown off the roof,peeling back several sheets of tin.Widely scattered showers and thunderstorms developed across portions of southwest Arkansas during the late afternoon andearly evening hours. These were heat induced thunderstorms that were pulse type storms that produced strong wind gusts upondecay and cloud to ground lightning. Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Union County1 SE Smith 22 1640CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Trees were downed along Hwy. 167 between South Jackson Avenue and Iron Mountain Road.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Union CountyEl Dorado 22 1645CST 0 0 100.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds downed several trees...some of which struck homes in the El Dorado area. There were no reports ofinjuries. Damage was reported to the El Dorado High School building on Timberlane and Parnell Road. The winds blew downa wall to one of the buildings along with large trees that fell on the school property. Half the roof was also taken off a home inthe Mount Moriah community.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Union County1 ENE El Dorado 22 1650CST1750CST 0 0 0.00K 0.00K Flash FloodTwo feet of water was reported over portions of East Hillsboro Road in El Dorado, Arkansas. Water was reported up to thebumpers of some vehicles.47

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ARKANSAS, SouthwestUnion County5 ESE Caledonia 22 1710CST 0 0 5.00K 0.00K Thunderstorm Wind (54EG)Numerous trees were downed along East Stateline Road near Iron Mountain Road east of Junction City, Arkansas. A portionof a roof was removed from a home on Lyons Lane.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Miller County1 SW Fouke 22 1752CST 0 0 20.00K 0.00K Thunderstorm Wind (58EG)A roof was removed from a house near CR 8 and CR 12 in Fouke, Arkansas.Severe thunderstorms developed during the heating of the day across Southwest Arkansas into Northwest Louisiana. Thisactivity developed ahead of a frontal boundary that was pulled up nearly stationary across central Arkansas. Afternoontemperatures were between 100 and 105 degrees so instability was excessive across the region. Note: The estimated wind gustof 58 knots is equivalent to 67 mph.Sevier CountyDe Queen 30 1800CST 0 0 100.00K 0.00K LightningFire destroyed a home on Mountain View Road near De Queen Lake in De Queen, Ark., Monday evening. It was determinedthat the fire was started by a lightning strike from thunderstorms in the evening. There were no injuries reported from the firebut the house was a total loss.Isolated thunderstorms were prolific lightning producers across Southwest Arkansas during the evening hours of August 30th.One of these storms near DeQueen, Arkansas struck a home and the home was consumed in fire.CALIFORNIA, Extreme SoutheastRiverside County15 ENE Desert Hot Spgs 26 1430PST 0 0 2.00K 0.00K LightningThe Chief Ranger at JTNP reported lightning started a brush fire that burned for two days and consumed about 110 acres in theKeys View area.Afternoon thunderstorms and frequent lightning ignited fires in Joshua Tree NP.Imperial CountyBard 27 1515PST 0 0 40.00K 0.00K Thunderstorm Wind (60EG)Winds uprooted about 26 date palms, and damaged buildings in Bard and Winterhaven. Approximately half of the roof of alocal community center in Bard collapsed, in addition to the roof of a business called the Old Bard Store.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Imperial County1 NW El Centro 27 1527PST1533PST 0 0 0.00K Hail (1.50)Hail to ping pong ball size was reported by the public in El Centro.Imperial CountyBrawley 27 1533PST1600PST 0 0 0.00K Hail (1.75)A trained storm spotter in the town of Brawley reported golf-ball sized hail.Imperial CountyBrawley 27 1635PST 0 0 6.00K 0.00K Thunderstorm Wind (52EG)Several large eucalyptus trees blown down and an empty water tank rolled 100 feet.Severe storms moved northward throughout the Imperial Valley with damaging winds and large hail. Note: The estimatedwind gust of 52 knots is equivalent to 60 mph.48

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010CALIFORNIA, South CentralCAZ096-097South Sierra Mountains - Tulare County Mountains01310000PST2359PST 0 0 0.00K 0.00K WildfireThe Slope Wildfire in Yosemite National Park ignited on July 25, 2010 at 1445 PDT. The cause was lightning. The locationwas northwest of White Wolf in Tuolumne County. The size was 1709 acres. This fire was not contained until early Octoberdue to rainfall. The cost was $75,000. There were no fatalities or property damages reported.07312300PST2359PST 0 0 0.00K 0.00K WildfireThe Vernon Wildfire occurred in Yosemite National Park. The ignition date was August 8, 2010, at 0000 PDT. The cause waslightning. The location was 21 Miles North-Northwest of Yosemite Valley in Tuolumne County. The size was 909 acres. Thefire was contained on October 3. No fatalities or damages occurred. The cost was $50,000.CAZ095Kern County Mountains24281127PST1800PST 0 0 0.00K 0.00K WildfireThe Post Wildfire occurred in Kern County near Lebec, and was managed by the Kern County Fire Department. The Ignitiondate was August 24, 2010 at 1227 PDT. The cause was unknown and the size was 1312 acres. Containment was made onAugust 28, 2010. There were no fatalities or structures lost, and the cost was $5,139,691.CALIFORNIA, SoutheastSan Bernardino County1 SW Needles 08 0013PST0200PST 0 0 10.00K 0.00K Flash FloodHighway 95 was closed just south of Interstate 40 due to flooding.An unseasonably deep Pacific trough interacted with monsoon moisture to produce scattered severe thunderstorms and flashflooding across the Mojave Desert.San Bernardino County4 SSE Lenwood 17 1510PST1515PST 0 0 0.00K 0.00K Hail (1.00)A spotter estimated quarter size hail on Interstate 15 just south of Outlet Center Drive.San Bernardino County4 SSE Lenwood 17 1510PST1515PST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)Winds estimated at 60 mph blew a big rig off Interstate 15 just south of Outlet Center Drive.Monsoon moisture fueled scattered thunderstorms over the Mojave Desert. A few storms produced severe weather and flashflooding. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.San Bernardino County6 NNW Cima 25 1340PST1430PST 0 0 0.00K 0.00K Flash FloodCima Road was flooded and impassable.San Bernardino CountyYucca Vly Arpt 25 1419PST1500PST 0 0 10.00K 0.00K Flash FloodSpotters reported cars stuck in 8-12 inches of flowing water on Highway 62 at Hilton Ave., and large rocks washed onto thehighway at Warren Vista.49

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010CALIFORNIA, SoutheastInyo County6 ENE Ryan 26 1300PST1500PST 0 0 0.00K 0.00K Flash FloodInyo CountyDunmovin 2627Six inches of water flowed across Highway 190.1345PST0845PST 0 0 200.00K 0.00K Flash FloodThree to four feet of mud flowed out of the Clover Fire (2008) burn area across Highway 395 near Dunmovin, strandingnumerous vehicles and washing one big rig off the road. The highway fully reopened the next morning.Inyo County14 SSW Ryan 26 1430PST1600PST 0 0 5.00K 0.00K Flash FloodWater and debris flowed over Badwater Road south of Badwater.Inyo CountyPanamint Spg 26 1500PST1830PST 0 0 10.00K 0.00K Flash FloodHighway 190 was covered with water and debris.San Bernardino County2 NNE Barstow 26 1500PST1600PST 0 0 10.00K 0.00K Flash FloodWater and debris flowed over several roads in the eastern part of Barstow.San Bernardino County1 NNW Barstow 26 1500PST 0 0 2.00K 0.00K LightningLightning struck a house.San Bernardino CountyAmboy 26 2015PST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)This gust was associated with an outflow boundary which had moved well away from the parent thunderstorm.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.San Bernardino County9 NNW Bannock 27 2030PST2330PST 0 0 20.00K 0.00K Flash FloodHighway 95 was washed out.Monsoon moisture fueled several rounds of thunderstorms over the Mojave Desert, with the greatest coverage of storms on the26th and 27th. Several storms produced severe weather and flash flooding.CALIFORNIA, SouthwestCAZ048San Bernardino County Valley/The Inland Empire03 0654PST1800PST 0 2 0.00K 0.00K WildfireThe El Toro fire began at approximately 0654 PST on August 3rd near the intersection of El Toro Road and Lindell Road nearthe city of Lake Elsinore, CA. The cause of the fire was determined to be motorized cutting equipment used to dismantle anabandoned vehicle. The fire grew to 32 acres before being contained around 1800 PST on August 3rd. Paramedics evaluatedone firefighter for minor injuries on-site and transported another firefighter to a local hospital for heat-related injuries. Nodamage was reported.50

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010CALIFORNIA, SouthwestSan Bernardino County1 W Sugarloaf 25 1045PST1145PST 0 0 0.00K 0.00K Heavy RainThe Big Bear City South Mesonet site reported 1.02 inches of rain fell between 1045 and 1145 PST on August 25th. The stormtotal for that site was 1.54 inches, which fell between 0945 and 1245 PST.San Bernardino County4 N Yucaipa 25 1145PST1153PST 0 0 0.00K 0.00K Heavy RainThe Mesonet site at Yucaipa Ridge reported that 0.51 inches of rain fell in 8 minutes between 1145 and 1153 PST on August25th.San Bernardino County2 NW Forest Falls 25 1150PST1200PST 0 0 0.00K 0.00K Flash FloodA thunderstorm near Forest Falls, CA dumped rain for approximately 45 minutes over the western portion of the community.Trees, boulders and mud were reported flowing down Valley of the Falls Road, causing that portion of the road to be closed totraffic for several hours.Riverside County1 E Elsinore 25 1300PST1530PST 0 0 80.00K 0.00K Thunderstorm Wind (52EG)A severe thunderstorm with estimated wind gusts of 60 MPH brought down ten power poles on Pottery Street in Lake Elsinore.Live power lines fell on a RTA bus around 1330 PST, trapping the driver and 11 passengers for two hours. Trampolines werealso picked up and blown into adjacent yards. Street flooding was also reported in Lake Elsinore.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Riverside County1 SE Valle Vista 25 1336PST1349PST 0 0 0.00K 0.00K Heavy RainThe East Hemet Mesonet site reported between 0.50 to 1.01 inches of rain fell between 1336 and 1349 PST.Riverside County2 SE Valle Vista 25 1336PST1346PST 0 0 0.00K 0.00K Heavy RainThe C4086 mesonet site located in Hemet, CA reported 0.50 inches of rain fell between 1336 and 1346 PST on August 25th.Riverside County2 SE Valle Vista 25 1349PST1500PST 0 0 0.00K 0.00K Flash FloodHighway 74 closed due to flooding until 1600 PDT.San Bernardino County1 N Wrightwood 25 1400PST1435PST 0 0 0.00K 0.00K Heavy RainThe Wrightwood Mesonet site reported 0.81 inches of rain fell within 35 minutes between 1400 and 1435 PST on August 25th.San Bernardino County1 ENE Wrightwood 25 1400PST1436PST 0 0 0.00K 0.00K Heavy RainA member of the public called to report mud, debris and four inch diameter rocks washing down the Sheep Creek Wash at thebase of Heath Canyon near Wrightwood, CA on August 25th. Highway 2 was closed between Desert View and Summit Roadsdue to water, mud and debris washing across the roadway.51

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010CALIFORNIA, SouthwestSan Bernardino County3 SW Forest Falls 26 1048PST1119PST 0 0 0.00K 0.00K Heavy RainALERT gauge 2801 at the Oak Glen Watershed measured 0.47 inches of rain between 1048 and 1119 PST on August 26th.San Diego County5 NW Warner Spgs 26 1130PST1230PST 0 0 0.00K 0.00K Flash FloodSpotter SDG173 reported 1.8 inches of rain measured between 1200 and 1256 PST. Mud, debris and rocks were reportedflowing across side roads and blocking Highway 79 near Warner Springs.San Diego County5 NW Warner Spgs 26 1154PST1230PST 0 0 0.00K 0.00K Hail (1.00)Spotter SDG173 observed a max hail size of 1 inch in Sunshine Summit (approximately 9 miles NW of Warner Springs), whilethe average hail size was more like 0.75 inch. Estimated duration for the hail and heaviest part of the thunderstorm was 10 to 15minutes. Estimated wind gusts of 50 to 60 MPH also accompanied the rain and hail.Moist and unstable monsoonal flow triggered scattered showers and thunderstorms across San Diego, San Bernardino andRiverside Counties, a few of which reached severe status with large hail and damaging winds. Localized flash flooding wasalso reported in a few locations over the 2-day event.CAZ055San Bernardino County Mountains26281200PST1800PST 0 0 0.00K 0.00K WildfireLightning caused three brush fires near Inspiration Point, Keys View and Upper Boy Scout Trailhead within the Joshua TreeNational Park at approximately 1200 PST on August 26th. The fire grew to 110 acres and burned on rocky slopes withscattered pinon pines, junipers, Joshua trees and other desert brush. The road to Keys View from the Park Boulevard junctionwas temporarily closed to the public.San Bernardino County2 WSW Victorville 26 1200PST1230PST 0 0 0.00K 0.00K Flash FloodSeneca Road from Amargosa Road to El Evado Road was completely washed out due heavy rain on the afternoon of August26th. Several other roads in Victor Valley, including Palmdale Road and portions of Highway 18 were flooded as well.San Diego County4 E Lake Henshaw 26 1220PST1250PST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)The Mataguaty SDGE anemometer, located at 6 meters above ground level, measured a peak wind at 1230 PST out of theNNW at 30 MPH with a gust of 60 MPH. Downdrafts in excess of 40 MPH began shortly after 1220 and continued until 1250PDT.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Riverside County1 E Hemet Ryan Arpt 26 1230PST1330PST 0 0 10.00K 0.00K Thunderstorm Wind (65EG)Media reported downed power lines and trees of 1 to 2 feet in diameter near Hemet, CA on August 26th. Wind gusts estimatedbetween 60-70 mph.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Riverside County1 N Winchester 26 1340PST1430PST 0 0 0.00K 0.00K Heavy RainALERT gauge 248 in Winchester, CA in Riverside County measured 0.49 inches of rain between 1340 and 1430 PST onAugust 26th. Instantaneous rainfall rates between 1400 and 1415 reached over an inch per hour.52

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010CALIFORNIA, SouthwestSan Bernardino County2 W Fawnskin 26 1358PST1429PST 0 0 0.00K 0.00K Heavy RainThe Fawnskin ALERT gauge in San Bernardino County recorded 1.30 inches of rain in 31 minutes between 1358 and 1429PST on August 26th.San Bernardino County4 SSW Cushenbury 26 1400PST1530PST 0 0 0.00K 0.00K Flash FloodCALIFORNIA, UpperA spotter reported 1.73 inches of rain fell between 1400 and 1530 PST on August 26th. The heavy rain flooded Highways 18and 247 with 2 to 3 feet of water over the roadways.Two swift water rescues were performed, including three people in a carwho got washed away, but were saved.Moist and unstable monsoonal flow triggered scattered showers and thunderstorms across San Diego, San Bernardino andRiverside Counties, a few of which reached severe status with large hail and damaging winds. Localized flash flooding wasalso reported in a few locations over the 2-day event.CAZ080Western Siskiyou County01040000PST1810PST 0 0 0.00K 0.00K WildfireThe Dutch fire broke out in the Klamath National Forest at 1620 PST on the afternoon of 07/31/10.COLORADO, Central and NortheastElbert County2 WSW Kutch 02 2000MST2115MST 0 0 10.00K 0.00K Flash FloodThunderstorms producing very heavy rain caused flash flooding near Kutch. Several county roads were washed out by thefloodwaters.Very heavy rain produced flash flooding in southeast Elbert County.Boulder County5 WNW Meeker Park 03 1500MST 0 1 0.00K 0.00K LightningA hiker was struck while traversing The Narrows portion of Longs Peak in Rocky Mountain National Park. The 31-year-oldman was struck late in the afternoon at an elevation of 13,800 ft. after taking shelter under a rock ledge when a stormapproached. The lightning apparently struck a rock then hit the man in the head. He was knocked out for approximately 14hours and was not found until the next morning. The man suffered from numerous burn injuries. He was concious and able towalk slowly. He recalled his hair standing on end but was unable to remember being hit by the lightning.A hiker was struck by lightning near the summit of Longs Peak.Adams CountyWestminster 04 1530MST 0 0 30.00K 0.00K LightningLightning struck a residence and sparked a fire. The fire migrated in the space between the first and second floor.Lightning sparked a house fire, causing extensive damage.Adams CountyWestminster 06 1545MST 0 0 20.00K 0.00K LightningLightning sparked a fire at a townhome. The fire caused damage to the exterior roof and severe damage to the trusses in theattic.Lightning struck a Westminster townhome.53

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010COLORADO, Central and NortheastArapahoe CountyGreenwood Vlg 08 2300MST 0 0 100.00K 0.00K LightningLightning sparked a fire in a restaurant shortly after midnight. It caused extensive damage.Weld County1 E Galeton 09 1623MST 0 0 Hail (0.75)County Road 51, between State Highway 392 and County Road 74,was inundated with 6 to 8 inches of water. A trained spottermeasured 2.53 inches of rain near this location.Morgan County1 NNE Ft Morgan 09 1733MST 0 0 Thunderstorm Wind (61EG)Intense thunderstorm winds downed several trees and power lines.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Logan County8 N Willard 09 1739MST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Morgan County3 SSE Ft Morgan3 SSE Bijou09 1740MST2015MST 0 0 50.00K 10.00K Flash FloodHeavy rain produced flash flooding in and around Fort Morgan. Widespread flooding was reported to homes and businesses.Basements were flooded as the streets were inundated with 1 to 3 feet of standing water. Radar estimated up to 3 inches ofrain had fallen in the area.Logan County6 ENE Buchanan 09 1841MST 0 0 Thunderstorm Wind (56MG)Note: The measured wind gust of 56 knots is equivalent to 64 mph.Washington County4 SSW Otis 09 1842MST 0.01 50 0 0 0.00K 0.00K Tornado (EF0)A tornado touched down briefly in an open field but did no damage.Washington County12 ENE Elba 09 1844MST 0.1 50 0 0 0.00K Tornado (EF1)A tornado touched down and destroyed half of a barn.Logan County8 S Fleming 09 1849MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Note: The measured wind gust of 56 knots is equivalent to 64 mph.Phillips County4 E Paoli 09 1937MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Severe thunderstorms produced heavy rain and damaging winds across parts of Logan, Morgan, Phillips, Washington and WeldCounties. The strong winds downed trees and power lines. In addition, two tornadoes touched down. One of the tornadoesdestroyed half of a barn. Heavy rain produced flash flooding in Fort Morgan. Note: The measured wind gust of 52 knots isequivalent to 60 mph.Jefferson CountyGolden 16 1038MST 0 0 0.00K 1.00K LightningA lightning strike sparked a small grass fire near Quaker Street and Golden Road. It was quickly extinguished by emergencyresponders.54

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010COLORADO, Central and NortheastArapahoe CountyLittleton 16 1120MST 0 1 0.00K 0.00K LightningA 14-year-old teenager was struck by lightning while washing her family's car. The bolt struck the street nearby; it thentraveled up a stream of water flowing from the vehicle and hit the teenager. She received minor injuries.Jefferson CountyMorrison 16 1140MST 0 0 0.00K 1.00K LightningLightning struck a tree in Morrison.Arapahoe County1 ENE Deer Trail 16 1257MST 0.1 50 0 0 0.00K 0.00K Tornado (EF0)A tornado touched down briefly but did no damage.Elbert County4 WSW Lowland 16 1310MST 0 0 0.00K 0.00K Hail (0.88)Elbert County3 SW Agate 16 1316MST 0.1 50 0 0 0.00K 0.00K Tornado (EF0)A tornado touched down briefly but did no damage.Morgan County11 SSE Lodi 16 1454MST 0.1 50 0 0 0.00K 0.00K Tornado (EF0)A tornado touched down briefly but did no damage.Morgan County7 SSE Brush 16 1517MST 0.25 100 0 0 50.00K 0.00K Tornado (EF1)A tornado touched down near a home. It uprooted trees and did some damage to the home, breaking windows some windows.Two horse trailers were picked up and thrown approximately 100 yards. Several hundred yards of fence were torn out of theground, and several wood and steel fence posts were torn out of the ground. Debris was found up to a mile from where thetornado touched down. A small horse barn that had been recently built was also destroyed; one horse was badly injured andwas later euthanized.Weld County5 ESE Kaufman 16 1526MST 0 0 Thunderstorm Wind (52MG)Severe thunderstorms produced nickel size hail and strong winds across parts of Arapahoe, Elbert, Morgan and Weld Counties.Lightning struck a teenager in Littleton and sparked a grass fire in Golden. Four tornadoes reportedly touched down inArapahoe, Elbert and Morgan Counties. One of the tornadoes destroyed a small barn and damaged a home near Brush. Note:The measured wind gust of 52 knots is equivalent to 60 mph.Boulder County1 W Boulder 19 1910MST 0 0 Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Boulder County1 ESE Boulder 19 1923MST 0 0 Thunderstorm Wind (54MG)COLORADO, East CentralA severe thunderstorm produced intense outflow winds in Boulder County. Note: The measured wind gust of 54 knots isequivalent to 62 mph.Kit Carson County7 SSW Seibert 02 1900MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Pea sized hail covered the yard and heavy rain resulted in water flowing across the driveway.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.55

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010COLORADO, East CentralKit Carson County6 SE Flagler Arpt 02 1950MST 0 0 0.00K 0.00K Hail (0.88)Hail was 3 to 4 inches deep in some spots.Yuma CountyKirk 02 2223MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Thunderstorms moved across eastern Colorado during the evening and continued over western Kansas during the overnighthours. Several severe wind gusts were reported with little damage occurring. Note: The measured wind gust of 51 knots isequivalent to 59 mph.Yuma CountyWray 05 1840MST 0 0 0.00K 0.00K Hail (1.00)Heavy rain also occurred with water ponding at the intersection of Hwy 385 and Hwy 34.Thunderstorms moved across Yuma county during the evening, producing locally heavy rain and an isolated hail report.Kit Carson County8 NNW Seibert 07 1440MST 0 0 0.00K 0.00K Hail (1.50)Kit Carson County1 E Seibert 07 1527MST 0 0 0.00K 0.00K Hail (1.00)Kit Carson CountyStratton 07 1605MST1630MST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Observer reported several wind gusts over 60 mph in a 25 minute period, resulting in a few tree limbs blown down in the townof Stratton.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Kit Carson CountyStratton 07 1610MST 0 0 0.00K 0.00K Hail (1.00)Spotter also reported torrential rain and wind gusts to 41 mph.Kit Carson County1 NNW Stratton 07 1630MST 0 0 5.00K 0.00K Thunderstorm Wind (61EG)Calving shed blown down towards the west at Road 30.5 and Road W which is one half mile north of Stratton. Power lineswere also down just north of this location.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Kit Carson County12 WSW Burlington 07 1659MST 0 0 0.00K 0.00K Hail (0.75)Kit Carson County1 NW Bethune 07 1659MST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)This was a late report from CoCoRaHS observer.Note: The measured wind gust of 53 knots is equivalent to 61 mph.Kit Carson County1 S Flagler 07 1753MST 0 0 0.00K 0.00K Hail (1.00)Kit Carson County1 S Flagler 07 1754MST 0 0 0.00K 0.00K Hail (1.25)56

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010COLORADO, East CentralKit Carson County4 E Stratton 07 1950MST2150MST 0 0 0.00K 0.00K Flash FloodHigh water was reported running across County Road 35 and Highway 24 from Landman Creek.Thunderstorms developed and moved slowly across Kit Carson county during the afternoon and evening hours. Hail up towalnut size fell, and strong winds produced damage to utility poles and a calving shed. During the evening, heavy rain resultedin water flowing across highway 24 near Stratton.Kit Carson County18 NNE Vona 09 1725MST 0 0 0.00K 0.00K Hail (0.88)Kit Carson County18 NNE Vona 09 1725MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several small tree limbs one to one and a half inches in diameter were broken off trees.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Yuma County6 N Abarr 09 1820MST 0 0 0.00K 0.00K Hail (1.00)Yuma County1 W Yuma 09 1839MST 0 0 0.00K 0.00K Thunderstorm Wind (57MG)Note: The measured wind gust of 57 knots is equivalent to 66 mph.Yuma CountyYuma 09 1842MST 0 0 0.00K 0.00K Hail (1.00)Yuma County1 W Yuma 09 1901MST 0 0 0.00K 0.00K Thunderstorm Wind (60MG)COLORADO, South Central and SoutheastThunderstorms moved across eastern Colorado and northwest Kansas during the evening, producing wind gusts to 70 mph andquarter size hail. Tree and roof damage was reported in many areas. Note: The measured wind gust of 60 knots is equivalentto 69 mph.Pueblo County4 NW Pueblo West 02 1540MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)No structural damage occurred, but small tree limbs were downed.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pueblo County1 NNW Pueblo West 02 1547MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)No structural damage occurred, but small tree limbs were downed.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fremont County7 NNW Parkdale 02 1735MST1830MST 0 0 0.00K 0.00K Flash FloodWater...deeper than six inches...was seen running across the intersection of Highway 9 and County Road 11.Pueblo County3 NNE Pueblo West 02 1825MST2030MST 0 0 0.00K 0.00K Flash FloodNumerous roads were flooded by deep, flowing water.Slow moving strong to severe thunderstorms developed over Fremont...Teller...and Pueblo Counties...bringing heavyrain...flash flooding...and gusty winds.57

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010COLORADO, South Central and SoutheastPueblo County1 S Beulah 03 1645MST1650MST 0 0 0.00K 0.00K Hail (0.75)A strong thunderstorm produced hail up to the size of pennies in Beulah.Teller County8 NNW Woodland Park 04 1528MST1700MST 0 0 0.00K 0.00K Flash FloodUp to 3 feet of water flowed in a low water crossing near the intersection of Highway 67 and County Road 78.El Paso County2 W Green Mtn Falls 04 1710MST1830MST 0 0 0.00K 0.00K Flash FloodWater to a depth of one foot was seen on roadways around the Catamount Reservoirs and Crystal Reservoir.Slow moving thunderstorms produced flash flooding north of Woodland Park in Teller County and near the Pikes PeakHighway in El Paso County.El Paso County4 NNW Schriever Afb 08 1922MST1927MST 0 0 0.00K 0.00K Hail (0.75)A strong thunderstorm produced hail up to the size of pennies west of Ellicott.Las Animas County1 SE Branson 09 1214MST1219MST 0 0 0.00K 0.00K Hail (0.75)Kiowa County9 N Brandon 09 1630MST1635MST 0 0 0.00K 0.00K Hail (1.00)Prowers County3 S Holly 09 1635MST1640MST 0 0 80.00K 0.00K Thunderstorm Wind (70EG)South of Holly, a powerful microburst flipped over five center pivot irrigation systems both west and east of Highway 89. Twograin bins were destroyed and one severely damaged. Several vehicles at houses just north of the grain bins had their windowsblown out, and a camper trailer was toppled on its side. Twenty power poles had to be replaced along County Road DD west ofHighway 89 around a mile south of Holly.Storms produced hail up to quarter size and damaging winds near Holly. Note: The estimated wind gust of 70 knots isequivalent to 81 mph.El Paso County1 W Peterson Afb 12 1425MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)No damage occurred with the wind gust at the Colorado Springs Airport.A severe storm produced wind gusts up to 62 mph on the east side of Colorado Springs. Note: The measured wind gust of 54knots is equivalent to 62 mph.Las Animas County12 NNE Stonewall 15 1606MST1620MST 0 0 10.00K 0.00K Hail (2.00)Huerfano County10 S Walsenburg 15 1654MST1659MST 0 0 0.00K 0.00K Hail (1.00)Severe thunderstorms produced hail bigger than golf balls near the Spanish Peaks.58

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010COLORADO, WestCOZ019-022-023Animas River Basin - San Juan River Basin - Southwestern San Juan Mountains01310000MST2359MST 0 0 0.00K 0.00K DroughtDrought conditions across western Colorado were mostly unchanged throughout the month. A small portion of southwestColorado, mainly the southern San Juan mountains, improved to near normal conditions due to an active monsoon period.Garfield County3 E New Castle 04 1209MST1215MST 0 0 0.00K 0.00K Hail (1.00)Large hail up to 1.0 inch in diameter fell about 3 miles east of New Castle.Garfield County13 NW Rifle 04 1322MST1500MST 0 0 0.00K 0.00K Heavy RainHeavy rainfall caused mud and rocks to slide across Highway 13, blocking the Highway north of Rifle between mile markers 7and 10.Rio Blanco County1 NW Rangely22 ENE Rangely Arpt04 1327MST1400MST 0 0 0.00K 0.00K Heavy RainHeavy rainfall caused minor flooding to occur over low water crossings along Highway 64 near Rangely.Archuleta County4 NE Pagosa Spgs 04 1335MST1530MST 0 0 0.00K 0.00K Heavy RainHeavy rainfall caused a minor mudslide across Highway 160 just north of Pagosa Springs. The slide was about 6 to 8 feet wideand up to two and a half feet deep at its deepest sections. Rainfall amounts up to 0.50 inches within a 20 minute time periodwere reported just west of Pagosa Springs.Strong thunderstorms in a moist airmass produced heavy rainfall along with some large hail.Montrose County5 SW Montrose 04 1600MST1800MST 0 0 10.00K 0.00K Flash FloodA ten foot high and 30 foot wide wall of water came roaring down normally dry Tappan Wash and went out of its banks inplaces, including yards of residences as well as a section of Dave Wood Road. A person hiking up the wash narrowly escapedthe wall of water by quickly climbing up the wash embankment. Culverts and irrigation canals were clogged with debris whichincluded logs and a large amount of personal property. Some of the personal property items were later found downstream. Acamper trailer in a yard was knocked over and damaged by the flood waters, while a nearby trailer was picked up and carried ashort distance away.Subtropical moisture associated with an intense thunderstorm produced flash flooding just southwest of Montrose.Mesa County4 S Fruita3 SSW Redlands04 1600MST1830MST 0 0 0.00K 0.00K Heavy RainRunoff from heavy rainfall was running up to 6 inches deep in the normally dry canyons of the Colorado National Monument.Strong thunderstorms in a moist airmass produced heavy rainfall along with some large hail.San Miguel County2 W Norwood 16 1630MST1800MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused mud and debris up to a foot deep to flow across Highway 145 near the Norwood Hill area.Monsoonal moisture present over the area allowed afternoon and evening thunderstorms to develop which generated veryheavy rainfall over portions of western Colorado.59

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010COLORADO, WestDelta County3 NW Lazear3 S Paonia Arpt19 1545MST1605MST 0 0 2.00M 0.00K Thunderstorm Wind (78MG)A strong eastward-moving thunderstorm cell collapsed over central Delta County and produced damaging winds acrossportions of eastern Delta County. Measured wind speeds included 79 mph at a location 4 miles northwest of Hotchkiss and 90mph at a location just under 3 miles southeast of Hotchkiss. The damage pach extended from about 5 miles west-northwest ofHotchkiss to about 7 miles east of Hotchkiss. The width of the damage patch extended from about 2 miles north of Hotchkissto about just north of Crawford. Numerous trees were downed, with some trees more than 2 feet in diameter where they weresnapped off. Many houses and other personal property were damaged, including the historic brick Hotchkiss Barn. Anairplane was torn from its moorings and flipped over at the Paonia Airport. Power was out in many locations, though it wasrestored at most locations by the afternoon on the following day.A thunderstorm collapse resulted in a broad area of outflow wind damage. Note: The measured wind gust of 78 knots isequivalent to 90 mph.Montrose County6 ENE Olathe 19 1600MST1800MST 0 0 0.00K 0.00K Flash FloodHeavy rainfall resulted in the Gunnison River stage rapidly rising about 4 feet through the BLM's Gunnison Gorge WildernessArea. Numerous camp sites and trail heads were destroyed or covered in debris and boulders to the point that they were nolonger usable. The movement of boulders and silt significantly changed the characteristic of the Gunnison River in a number ofplaces, such as the Miracle Mile rapids where rapids no longer exist. Six river runners were trapped at the T-Dyke boater siteduring the event. Numerous small fish were killed by the flash flood.Heavy rainfall resulted in the Gunnison River rapidly rising in the Gunnison River Gorge.Mesa County1 E Whitewater 30 1100MST1105MST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)CONNECTICUT, SouthernStrong thunderstorm winds that were enhanced by gradient winds blew a construction worker off a scaffolding nearWhitewater. The strong winds also blew the unfinished house off of its foundation.Thunderstorm outflow winds were enhanced by gradient winds in the Whitewater area. Note: The estimated wind gust of 52knots is equivalent to 60 mph.New London County(GON)Groton-New Lndn 05 0730EST0750EST 0 0 10.00K LightningNumerous buildings throughout town were struck by lightning.New London County1 SW Long Hill 05 0745EST 0 0 0.00K 0.00K Funnel CloudA funnel cloud was spotted near the General Dynamics Electric Boat Division, in Groton.New London CountyDolpin Gardens 05 0750EST 0 0 5.00K Thunderstorm Wind (52EG)A few small trees were reported down throughout the town of Groton, including one tree being blown down along PoplarStreet, bringing down wires with it.An approaching pre-frontal trough triggered an isolated severe thunderstorm, that impacted coastal New London County fromNew London to Mystic. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fairfield County2 N Sherman 16 1451EST 0 0 5.00K Thunderstorm Wind (52EG)Trees, poles and wires were reported down at the intersection of Route 39 and Church Road in the town of Sherman.An approaching cold front triggered an isolated severe thunderstorm, which impacted far northern Fairfield County. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.60

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010CONNECTICUT, SouthernCTZ009Southern Fairfield22231700EST0600EST 0 0 7.5K Strong WindCTZ010Southern New Haven23 0400EST0700EST 0 0 10.0K Strong WindDELAWAREA developing coastal storm off of Long Island created strong winds and heavy rains, which were sufficient to bring down treesin Southern Fairfield and New Haven Counties.Sussex County1 NNE Blades 05 1650EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm knocked down a tree and several large tree limbs in the Middleport area of Seaford.The northern edge of a squall line of severe thunderstorms affected Sussex County during the late afternoon of the 5th. Note:The estimated wind gust of 50 knots is equivalent to 58 mph.DEZ001New Castle10110900EST1900EST 0 0 0.00K 0.00K Excessive HeatDEZ002-003Inland Sussex - Kent10110900EST1900EST 0 0 0.00K 0.00K HeatA three day heat wave from the 9th through the 11th peaked with high temperatures in the mid to upper 90s and afternoon heatindices of around 105F on the 10th in Delaware. A pair of backdoor cold fronts ended the hot weather on the 12th. While therewas a heat wave during the last couple of days in August (with some places recording the highest temperatures of the monththen), the 10th was the last time during 2010 that heat indices reached that high. Actual highest temperatures for the 10th and11th from north to south included 96 degrees at the New Castle County Airport, 93 degrees in Dover (Kent County) and 99degrees in Georgetown (Sussex County)While August did not crack the top ten warmest, the summer of 2010 was the warmest meteorological summer on record forthe state of Delaware since 1895 with an average temperature of 78.1 degrees. It was also the warmest meteorological summeron record at the New Castle County Airport with an average temperature of 77.8 degrees.Sussex CountyBethany Beach 17 1415EST1615EST 0 0 0.00K 0.00K Flash FloodThunderstorms dropped a Doppler Radar estimated up to four inches of rain across extreme southeast Sussex County. Thiscaused stream, field and poor drainage flooding.A sea breeze front helped trigger slow moving and regenerating thunderstorms across southeastern Sussex County.DISTRICT OF COLUMBIADistrict of Columbia1 E Walter Reed 05 0629EST 0 0 1.00K Thunderstorm Wind (61EG)A tree was down over the railroad track between Silver Spring and Tacoma.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.District of Columbia1 NW Walter Reed 05 0629EST 0 0 Thunderstorm Wind (58MG)A wind gust of 67 mph was measured near Silver Spring.Note: The measured wind gust of 58 knots is equivalent to 67 mph.61

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010DISTRICT OF COLUMBIADistrict of Columbia1 SSE Walter Reed 05 0630EST 0 0 3.00K Thunderstorm Wind (61EG)Trees were down on Georgia Avenue and Aspen Avenue.A backdoor cold front stalled out over the region on the 12th while and upper-level disturbance passed through the area. A hotand humid air mass ahead of the cold front produced moderate amounts of instability. Some thunderstorms that developed wereable to produce damaging wind. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.District of Columbia2 S Bolling Afb 05 1444EST 0 0 1.00K Thunderstorm Wind (65EG)A downed tree was blocking one southbound lane on Interstate 295.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.District of Columbia1 ESE Anacostia 05 1445EST 0 0 1.00K Thunderstorm Wind (50EG)A tree was down near Coral Hills.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.District of Columbia1 SE Bolling Afb 05 1445EST 0 0 30.00K Thunderstorm Wind (61EG)Trees fell onto three houses as well as power lines on the 3800 block of 1st Street SE.A hot and humid air mass remained over the area on the 5th. A series of upper-level disturbances in a zonal flow passedthrough the Mid-Atlantic during this time. Showers and thunderstorms developed during the afternoon and evening hours.There was enough instability from the hot and humid air mass for some thunderstorms to contain damaging winds. Note: Theestimated wind gust of 61 knots is equivalent to 70 mph.District of Columbia1 NW Us Capitol 12 0645EST0745EST 0 0 0.00K 0.00K Flash FloodFlash Flooding was reported at Constitution Avenue and 15th Street NW. A rain gauge in the area measured 1.34 inches.District of ColumbiaMount Pleasant 12 0652EST0752EST 0 0 0.00K 0.00K Flash FloodCleveland Park METRO Station was inundated by several inches of water flowing down the escalators.District of ColumbiaGeorgetown 12 0652EST0752EST 0 0 0.00K 0.00K Flash FloodWater was swiftly flowing downhill on Beach Drive NW.District of Columbia1 S Brookland 12 0656EST0756EST 0 0 0.00K 0.00K Flash FloodRhode Island Avenue was closed between 4th and 8th Streets NE.District of Columbia1 SSE Walter Reed 12 0700EST0800EST 0 0 0.00K 0.00K Flash FloodMissouri Avenue was flooded.A northwest to southeast oriented cold front drifted into the area as an upper level disturbance moved southeast across theregion. Thunderstorms initiated along the boundary during the morning, producing torrential downpours across northern andwestern parts of Washington. Rainfall amounts of 1 to 3 inches in under 2 hours were enough to produce flash flooding.62

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010DISTRICT OF COLUMBIADistrict of Columbia1 ESE Tenleytown1 ESE Mount Pleasant18 0610EST0710EST 0 0 0.00K 0.00K Flash FloodFLORIDA, East CentralRock Creek overtopped its banks, flooding portions of Rock Creek Parkway, Beach Drive, and Broadbranch Drive. Anautomated rain gauge nearby reported 3.17 inches.Low pressure moved west to east along a stationary boundary draped across far northern Virginia and Maryland.Thunderstorms associated with this low pressure produced very high rainfall rates with the aide of a moisture laden atmosphere.Flash flooding was reported across northwest portions of Washington DC during the morning from rainfall amounts of 2 to 3inches in less than 3 hours.Brevard County2 SSE Titusville Beach 06 1225EST 0 0 0.00K 0.00K Funnel CloudObservers at the Shuttle Landing Facility saw a brief funnel cloud develop just off to the northeast.A cluster of thunderstorms moved across the Kennedy Space Center (KSC) after interaction with the east coast sea breezefarther to the west. A brief funnel cloud formed in association with a thunderstorm near the coast north of Cape Canaveral. Thefunnel was observed by a weather observer at the Shuttle Landing Facility and was also observed and photographed by severalKSC employees.Volusia County2 NE Edgewater2 SE Coronado Beach07 1210EST1211EST 0.82 40 0 0 58.00K 0.00K Tornado (EF0)As a line of thunderstorms moved from the mainland to the Volusia County coast, a waterspout formed over Browns Bay, amarshy area east of the intracoastal river. The waterspout moved onshore the adjacent barrier island in New Smyrna Beach andproduced minor damage as it crossed to the Atlantic coast. Six homes received minor damage, and one home experienced moreextensive damage as a small part of roofing plywood and shingles was removed. Insulation was blown to the ocean about a halfmile away. See separate waterspout entry.A waterspout formed within a thunderstorm over the intracoastal river, then moved onshore the adjacent barrier island in NewSmyrna Beach and produced minor damage as it crossed to the Atlantic coast.Volusia County1 SE Edgewater 11 1105EST1106EST 0.27 20 0 0 5.00K 0.00K Tornado (EF0)A waterspout developed over the intracoastal waterway and moved onshore and inland for a short distance before dissipating asthe circulation approached US Highway 1. The waterspout developed in association with an isolated, heavy shower that peakedin intensity near the time of the touchdown. The waterspout moved onshore the mainland as a very weak tornado and firstimpacted Cameron's Marina, where a small boat on a trailer was overturned, damaging an adjacent pickup truck. The weaktornado then continued moving inland on a northwest track, causing soffit damage to another residence and minor tree damagealong the remainder of the path. The waterspout/tornado was observed and photographed by many individuals. Interestingly, acondensation funnel was not visible throughout its short life cycle, however, swirling water and debris were apparent and werelifted far aloft. See separate event for waterspout.Volusia County2 WSW Glencoe 11 1505EST 0.05 20 0 0 0.00K 0.00K Tornado (EF0)Volusia County EVAC Ambulance personnel reported a tornado touchdown in a heavily wooded area just west of Interstate 95and south of State Road 44 in rural Volusia County to the west of New Smyrna Beach. The brief tornado touchdown occurredalong the southwest edge of a cluster of strong thunderstorms which were training slowly northward.Scattered thunderstorms trained northward near the Florida east-central coast, within a strong southerly flow due in part to thepresence of Tropical Depression Five remnants near the central Gulf coast. Around mid day, a waterspout developed over theintracoastal river and moved onshore the mainland in Edgewater, producing minor damage. Several hours later, another stormdeveloped rotation and produced a brief touchdown in a wooded area, farther inland over southern Volusia County.63

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010FLORIDA, East CentralVolusia County2 E De Land Muni Arpt 22 1510EST 0 0 0.00K 0.00K Thunderstorm Wind (26ES)Weather likely played an indirect role in a vehicle-related fatality in DeLand. Saturated ground existed across the area due toseveral previous days of localized heavy rainfall. Between 1400 and 1500 LST, a thunderstorm moved southwest acrossDeLand, resulting in a quick two inches of additional rain and wind gusts to around 30 mph. These conditions combined withthe pre-existing saturated ground, likely weakened and helped topple a large pine tree. A moving pickup truck was hit by thefalling tree, then ran off the shoulder of the road as the driver lost control. The woman passenger was killed and the driver, herhusband, was critically injured.Saturated grounds from previous rains, along with recent heavy rain and 30 mph wind gusts from a thunderstorm passing 30minutes earlier, caused a large pine tree to topple as a vehicle was traveling beneath, resulting in a fatality. Note: The estimatedwind speed of 26 knots is equivalent to 30 mph.Orange County2 SW Isleworth 22 1600EST 0 0 2.00M 0.00K LightningFrequent to excessive cloud to ground lightning erupted within a cluster of storms over western Orange County between 1530and 1600 LST. During the next two hours, three homes in Windermere caught fire due to earlier lightning strikes. The firsthouse, damaged by fire, was reported at 1644 LST. One fireman sustained minor indirect injuries due to smoke inhalation whilefighting the fire. At 1652 LST, a fire was reported within a large estate home. The fire destroyed the home. A third house firewas reported nearby at 1740 LST and this home was damaged by fire. The following day, shortly before 0900 LST and 15hours after the lightning storm, another estate home in Windermere caught fire and was destroyed. Fire officials believed thatlightning from storms the previous afternoon struck the house and smoldered overnight. One fireman was treated for smokeinhalation while fighting this fire, an indirect, minor injury related to the lightning strike.A collision of the east coast and west coast sea breeze boundaries occurred to the west of Orlando during the late afternoon. Acluster of storms formed, producing frequent to excessive cloud to ground lightning. Lightning struck four homes within a 1mile radius of Windermere, resulting in fires. Three of the house fires began within 2 hours of the lightning strikes. The fourthhouse fire erupted the following morning, after likely smoldering overnight. Two estates homes were destroyed and two smallerhomes were damaged in the fires. Two minor indirect injuries resulted from fighting the fires.FLZ047Brevard28 0500EST 1 0 0.00K 0.00K High Surf30High surf and dangerous rip currents affected the east central Florida coast for several days, beginning August 28. Rough,breaking waves of 4 to 6 feet caused the drowning of a surfer in Brevard County. Brevard County life guards also rescued 68people from rough surf and rip currents on August 28 alone. Life guards in adjacent Volusia County reported several dozenocean rescues. The rough surf and dangerous rip currents persisted for several days. M47IWFLORIDA, Extreme SouthernMonroe County1 S Key Largo Pt Arpt 30 1810EST 0.1 15 0 0 0.50K 0.00K Tornado (EF0)A retired air traffic controller observed a waterspout moving onshore from the Atlantic waters in the Winston Waterwayssection of Key Largo. A few tree branches were downed with some patio furniture tossed about. A minor power outageoccurred nearby to 5 customers. The duration was only a few seconds with path length around 400 feet. Maximum winds wereestimated between 50 to 60 mph.A waterspout moved ashore as a weak tornado in Key Largo. Very minor damage occurred near the immediate shore.FLORIDA, NortheasternFlagler County1 E Bulow 01 1530EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Power lines were blown down near Bulow Plantation Ruins Historic State Park. The time of the event was based on radarimagery.A mid level short wave trough helped destabilize an unstable airmass and triggered a few severe storms during the afternoonalong the sea breezes and outflows. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Flagler CountyPine Lakes 20 1500EST1600EST 0 0 0.00K 0.00K Heavy RainA REACT volunteer measured 2.45 inches of rainfall in one hour.64

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010FLORIDA, NortheasternShowers and storms moved across the Florida peninsula under westerly flow over a moist airmass. Outflows converged withthe east coast sea breeze to produce periods of heavy rainfall.Duval County1 E Beeghly Hgts 26 1730EST1900EST 0 0 0.00K 0.00K Heavy RainA spotter on Summer Breeze Drive in north Jacksonville measured 2.25 inches of rainfall in 1.5 hours.A surface ridge axis was across south Florida with broad troughing over south Georgia. A short wave trough was moving eastover the Gulf Coast region with a swath of drier air over south Georgia. In addition, temperatures aloft decreased whichassisted in destabilization. A moist airmass and slow storm motion produced areas of heavy rainfall across north Florida in theevening.FLZ025Duval28 0000EST2359EST 0 7 0.00K 0.00K Rip CurrentPersistent onshore flow with near shore winds 15 to 20 knots combined with buildings wells of 3-5 ft with periods of 11 to 15seconds from distant tropical cyclones produced dangerous rip currents along the north Florida coast over the weekend. Manyrip current rescues were done.FLORIDA, NorthwestFLZ011Jackson01 1200EST1700EST 0 0 0.00K 0.00K Excessive HeatFLZ017Leon01 1200EST1500EST 0 0 0.00K 0.00K HeatFLZ012Bay01 1300EST1800EST 0 0 0.00K 0.00K Excessive HeatHigh heat indices of 110 or higher effected parts of the Florida Panhandle during the afternoon of August 1st. Panama City andMarianna also briefly experienced heat indices of 115.Leon CountyLake Bradford 04 1502EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown down with winds estimated at 50 knots at the FSU Reservation near the intersection of Lake Bradford andFlastacowo roads. The monetary damage figure provided is a rough estimate.A few afternoon thunderstorms developed with one storm becoming severe. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.Leon County1 W Woodville 07 1455EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Powerlines were blown down on Woodville Highway. The monetary damage figure provided is a rough estimate.A few afternoon thunderstorms developed with one storm becoming severe. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.Walton County2 W Point Washington 21 1329CST 0 0 2.00K 0.00K LightningLightning struck a home on Indiangrass Lane, which resulted in a fire. Firefighters were able to keep the damage to aminimum. One firefighter received minor injuries while battling the blaze. The monetary damage figure provided is a roughestimate.Afternoon thunderstorms developed with lightning striking a home off Indiangrass Lane.65

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010FLORIDA, NorthwestWalton CountyGrayton Beach 22 1350CST 0 0 2.00K 0.00K LightningA home along Garfield Street in Grayton Beach was struck by lightning, which caused a small fire in the attic above a rearbedroom. Firefighters were able to extinguish the fire quickly and keep damage to a relative minimum. The monetary damagefigure provided is a rough estimate.Afternoon thunderstorms developed with lightning striking a home in Grayton Beach.Bay County1 NE Parker 25 0030CST0230CST 0 0 0.00K 0.00K Flash FloodHeavy rain fell between 12:00 am CDT and 3:30 am CDT with a COCORAHS observer measuring 5.10 during that timeperiod. He also reported that there were several times when the water had risen enough on his street to cover it from edge toedge. The local overflow drainage rose to approximately six inches over the top of the wall, which normally only occurs duringextended periods of rainfall that last a day or more. No known damage or injuries occurred.Dixie County2 NNW Horseshoe Beach1 N Suwannee25280825EST0615EST 0 0 0.00K 0.00K FloodThunderstorms produced heavy rainfall amounts of 6 to 10 inches with localized amounts of 11 to 14 inches. This heavyrainfall resulted in prolonged and widespread flooding of roads and low-lying areas areas generally south of U.S. Highway 19between Horseshoe Beach and Suwannee. This is a rural area with no known property damage.Slow moving storms along the Gulf coast dumped heavy amounts of rain with some flooding reported.Leon County1 WSW Tallahassee Memorial Hosp 25 1712EST 0 0 15.00K 0.00K LightningA lightning strike caused a fire on the roof of Leon High School. Approximately 300 people were inside attending a banquet,but nobody was injured. Damages are estimated at approximately $15,000.Afternoon thunderstorms developed with a lightning strike hitting Leon County High School in Tallahassee.FLORIDA, SouthernPalm Beach County4 W Florida Gardens 02 1312EST 0 1 0.00K 0.00K LightningA teen was fishing at a lake near Lake Worth Road and the Turnpike in the Vista Pines Community when he was struck bylightning. A man witnessed the teen being struck and rushed to help. When arriving at the scene the teen was not breathing,bleeding out the nose, and burned, but he was revived and then rushed to Delray Medical Center where he was able to move hisextremities and was later able to talk.The boy was expected to recover from his injuries.Mid/upper level low pressure over Central Florida helped to produce afternoon thunderstorms over much of south Florida.FLZ168Palm Beach05 1500EST 0 0 0.00K 0.00K HeatA 2 and a half year old was left in a van and died due to hyperthermia.Palm Beach County5 WSW Boca Raton 07 1702EST1710EST 1.82 30 0 0 0.00K Tornado (EF0)66

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010FLORIDA, SouthernA small and short-lived tornado moved through the West Boca area, with numerous reports received of trees down, overturnedpatio furniture, street lights knocked down, some roofing shingles blown off houses, and downed power lines from around theintersection of Powerline Road and SW 18th Street to the Boca Point Golf Course. No major structural damage was reported.No damage assessment was performed by county officials due to the minor nature of the damage.Unstable atmospheric conditions led to thunderstorm development along the sea breeze front during the afternoon hours,leading to convergence of strong storms over southern Palm Beach which triggered a tornado in the Boca Raton area.Palm Beach County2 W Jupiter 14 1430EST1530EST 0 0 0.00K 0.00K Flash FloodFLORIDA, West CentralA spotter reported severe street flooding in Jupiter with Central Blvd and Indian Creek Parkway closed. Rainfall reports fromthe area were of 3.75 inches of rain in only 45 minutes.Strong and slow-moving thunderstorms produced flooding in the Jupiter area due to light atmospheric flow and copiousmoisture.Pasco County3 WNW Crystal Spgs 01 1500EST 0 1 0.00K 0.00K LightningLightning struck a barbed-wire fence in a cow pasture and injured a 9-year-old boy who was reaching through the fence to pet acow. The boy briefly lost consciousness and couldn't move his right side after the strike. He was hospitalized overnight andregained feeling in his right side. The strike also knocked down an 11-year-old boy, a cow, and a calf that were all near thefence, but all stood back up within seconds uninjured. The strike was the first strike in the area, with the thunderstorm movingin shortly thereafter.Hillsborough County4 SSW Wimauma 01 2047EST 0 0 435.00K 0.00K LightningLightning struck a home and started a fire that consumed the 5,000 square foot structure and it's contents. The family was out oftown at the time, so there were no injuries.Hillsborough CountyTampa International Airport 02 1630EST 0 1 0.00K 0.00K LightningAn airlines employee was injured by lightning that struck the outside tarmac or ramp area near where they were standing atTampa International Airport.A stalled and dissipating frontal boundary was in place to the north of the area with high pressure ridging across south Florida.Scattered afternoon thunderstorms developed in the moist west to southwesterly flow each afternoon.Pinellas County3 SE Gulfport 08 1600EST1830EST 0 0 0.00K 0.00K Heavy RainHeavy rains caused street flooding that closed the on and off ramps from Interstate 275 at 54th Avenue South for about an hour.A trough of low pressure was in place across the northern Florida peninsula. Very deep moisture was in place across the areaallowing numerous showers and thunderstorms to develop in the unstable atmosphere. Heavy rains from these storms causedsome minor flooding.FLZ055Manatee12 1423EST 2 2 0.00K 0.00K Rip CurrentThe remnants of Tropical Depression 5 were in place across the northern Gulf of Mexico with a strong south to southwest windflow in place across the area. Choppy seas of four to six feet caused large breaking waves along area beaches and increased therisk for rip currents. F71IW, M?IW67

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010FLORIDA, West CentralManatee County2 SSW Rosedale 25 1600EST1800EST 0 0 0.00K 0.00K Heavy RainTwo eastbound lanes of State Road 70 were closed near the intersection of Lockwood Ridge Road due to street flooding fromheavy rains.Levy CountyCrackertown 26 1700EST2300EST 0 0 0.00K 0.00K Heavy RainHighway 40W was closed near the intersection of 51st Street due to street flooding from heavy rains.Levy County6 WSW Duttons Spur 27 1400EST1700EST 0 0 0.00K 0.00K Heavy RainWater was covering State Road 24 near Rosewood due to heavy rains.Lee County2 W Whiskey Creek 27 1730EST 0 0 10.00K 0.00K Thunderstorm Wind (35EG)There was damage to two lanais on southeast 40th Terrace.Note: The estimated wind gust of 35 knots is equivalent to 40 mph.Highlands County4 S Lake Jackson 28 0100EST0400EST 0 0 0.00K 0.00K Heavy RainThere were several streets that were closed due to street flooding from heavy rains in the Orange Blossom Estates areasouthwest of Sebring. Based off of radar, an estimated three to five inches of rain fell across that area. Portions of Lily Street,Maxanna Boulevard and Apple Road had closures.A persistent surface trough was in place to the north of the area with an upper trough in place over the area. Numerous showersand thunderstorms developed each day in the very moist and unstable environment. Long durations of heavy rainfallaccumulations caused some flooding and strong gusty winds with storms caused some minor damage.GEORGIA, LowerCamden County1 S Waverly 01 1540EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down into power lines. The fire department was dispatched because residents detected smoke, but a fire didnot develop.A mid level short wave trough helped destabilize an unstable airmass and triggered a few severe storms during the afternoonalong the sea breezes and outflows. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Glynn County1 ENE Brunswick 18 1930EST 0 4 30.00K 0.00K Heavy RainThe combination of heavy rainfall, water pooling on the roof and structural failure caused the roof of the Family Dollar Storeon 4420 Altama Avenue in the Brunswick area to collapse. One person was hospitalized due to injuries and 3 others sufferedminor injuries. Radar indicated rainfall rates near 2 inches per hour, and the time of the event was estimated. The cost ofdamage was estimated at $20K and the cost of supply damage was estimated at $10K.An upper level ridge was over the area with a southwesterly low level flow over the area. Scattered precipitation developedalong the sea breezes and outflow boundaries, and with slow storm motion and high precipitation content in the area stormsproduced periods of heavy rainfall.Atkinson County1 E Pearson 26 1857EST 0 0 0.00K 0.00K Funnel CloudThe Atkinson County 911 Dispatch relayed a public report of a funnel cloud in Pearson.68

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, LowerA surface ridge axis was across south Florida with broad troughing over south Georgia. A short wave trough was moving eastover the Gulf Coast region with a swath of drier air over south Georgia. In addition, temperatures aloft decreased whichassisted in destabilization. A strong storm produced a funnel cloud that was observed near Pearson in the evening.GEORGIA, North and CentralFayette County2 WSW Starrs Mill 01 1330EST 0 0 25.00K 0.00K LightningThe Peachtree City Fire Department reported that lightning struck a home on Spring Court off Rockaway Road, approximatelythree miles southeast of Peachtree City. Damage to the structure was minor.Jackson County3 SSW Pendergrass5 SE HoschtonBarrow County5 NNE WinderRussell01 1418EST1429EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)The Jackson County 911 Center reported that several power lines were down across the western part of the county. One treewas also down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.01 1429EST1453EST 0 0 1.50K 0.00K Thunderstorm Wind (39EG)The Barrow County 911 Center reported that five trees were down around Winder.Note: The estimated wind gust of 39 knots is equivalent to 45 mph.Douglas CountyFairplay 01 1728EST1732EST 0 0 0.00K 0.00K Hail (0.75)The public reported penny-sized hail around Fairplay on East Carroll Road.Douglas CountyFairplay 01 1728EST 0 0 5.00K 0.00K LightningThe Douglas County Emergency Management Director reported that a home in Fairplay was struck by lightning. Damage tothe home was in the form of a damaged phone box and the electrical wiring adjacent to a clothes dryer in the utility room.Crisp CountyArabi4 N Raines01 2030EST2045EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)The Crisp County Emergency Management Director reported that a portion of a roof was blown off a home near Arabi and abarn, approximately three miles east of Georgia Veterans Memorial State Park, lost its roof in strong thunderstorm wind gusts.Bartow CountyAdairsvilleCartersvilleA strong subtropical ridge persisted across Texas, but was beginning to build wastward into the mid-south and southeast U.S.An upper trough was located across the northeast into the mid-Atlantic region. This provided Georgia with unstable northwestflow aloft. Meanwhile...a weak cold front was moving slowly south through central Georgia. Hot temperatures and dewpointsin the low and mid 70s made for a very unstable atmosphere across the region. Scattered thunderstorms developed during themid-afternoon and persisted into the evening. The most persistent and intense thunderstorms originated from a cluster ofthunderstorms that developed in northeast Georgia and slowly worked its way south-southwest into central Georgia. Intenselightning and damaging downburst winds were noted with some of the thunderstorms, along with very heavy rain. Note: Theestimated wind gust of 50 knots is equivalent to 58 mph.05 1625EST1700EST 0 0 250.00K 0.00K LightningThe Bartow County 911 Center reported that seven homes across the county were struck by lightning. Damages ranged fromminor to moderate.69

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, North and CentralBartow County3 NW CartersvilleAtco05 1630EST1645EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Fannin CountyMorgantonMargretThe Bartow County 911 Center reported that at least six trees and a few power lines were down northwest of Cartersville,mostly in the Sugar Valley Road area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1656EST1710EST 0 0 1.00K 0.00K Thunderstorm Wind (39EG)The Fannin County 911 Center reported that four trees were blown down across the eastern portion of the county, aroundMorganton on Old Georgia Highway 76.Note: The estimated wind gust of 39 knots is equivalent to 45 mph.Gilmer County1 WNW Cherry Log 05 1657EST1702EST 0 0 1.00K 0.00K Thunderstorm Wind (35EG)The Gilmer County Emergency Management Director reported that a few trees were blown down in the far northeast part of thecounty.Note: The estimated wind gust of 35 knots is equivalent to 40 mph.Murray County3 SW Ramhurst 05 1710EST1715EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)The Murray County 911 Center reported that the roof was blown off a barn near the intersection of Maple Grove and ChurchRoads in the far southern part of the county, south of Ramhurst. Three trees were also down in this same general area.Gilmer CountyTails CreekEllijayNote: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1720EST1735EST 0 0 1.00K 0.00K Thunderstorm Wind (37EG)The Gilmer County Emergency Management Director reported that a few trees were blown down in the west central and centralpart of the county between Tails Creek and Ellijay.Note: The estimated wind gust of 37 knots is equivalent to 43 mph.Gilmer County4 NNW Tails Creek 05 1749EST1800EST 0 0 1.00K 0.00K Thunderstorm Wind (35EG)The Gilmer County Emergency Management Director reported that a few trees were blown down in the west central andnorthwest part of the county near Mountaintown. Event times and location were based on radar data. The Emergency Managerreported that approximately 10 trees were blown down across the county in an approximate one-hour period between 6 pm and7 pm EDT. Radar data suggests that much of this occurred near Tails Creek in the west central part of the county.Lumpkin CountyTurners CornerDahlonegaNote: The estimated wind gust of 35 knots is equivalent to 40 mph.05 1755EST1820EST 0 0 1.00K 0.00K Thunderstorm Wind (37EG)The Lumpkin County Emergency Management Director reported that four to five trees, mostly pine, were blown down. Atleast one of these trees was dead and was partially blocking a road.A fairly strong cold front for early August was moving through the eastern U.S., including the southeast U.S., supported by avigorous upper trough in the northeast U.S. With a very moist, unstable air mass remaining in place at the surface across thesoutheast U.S., scattered strong and isolated severe thunderstorms developed across mainly north Georgia during the afternoon.Most of the damage was the result of thunderstorm downburst winds. Note: The estimated wind gust of 37 knots is equivalentto 43 mph.70

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, North and CentralFannin CountyDial1 S Margret06 1219EST1223EST 0 0 0.00K 0.00K Hail (1.25)The public observed half-dollar-sized hail in the Cooper Creek area in the far southeast part of Fannin county.Lumpkin County4 W Turners Corner 06 1236EST1240EST 0 0 0.00K 0.00K Hail (1.00)The public observed quarter-sized hail near Turners Corner.Jackson County1 N Commerce 06 1500EST 0 0 25.00K 0.00K LightningThe Athens Banner Herald reported that lightning struck a tree next to a home on State Street in Commerce. The treesubsequently fell onto the roof of the adjacent garage, causing damage to the structure.De Kalb County2 NW Chamblee 06 1636EST 0 0 0.50K 0.00K LightningThe DeKalb County Emergency Management Director reported that lightning struck a tree causing the tree to split apart andfall.Douglas CountyWinstonChapel Hill06 1649EST1701EST 0 0 150.00K 0.00K LightningThe Douglas County Emergency Management Director reported that four lightning-related fires occurred across the countybetween 549 pm EDT and 601 pm EDT as strong thunderstorms tracked from northwest to southeast.Houston County2 ENE Centerville 06 1830EST 0 0 5.00K 0.00K LightningAn off-duty employee with Warner Robins Air Force Base reported that lightning struck his home in Warner Robins. While nofire was reported, damage was observed to electrical and telephone wiring and an air conditioning system.A cold front continued to approach Georgia from the northwest as a deep upper trough was rotating through the northeast U.S.Unstable northwest flow aloft combined with the front and a very hot, humid air mass across Georgia to help develop scatteredto numerous thunderstorms across the north part of the state during the afternoon and evening. Only a couple of thesethunderstorms became severe, but all produced frequent to intense cloud-to-ground lightning and very heavy rain.Wilcox County1 N Owensboro 07 1642EST1645EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)The Wilcox County 911 Center reported that at least a dozen trees were down around Owensboro near Georgia Highway 233.The weak cold front that had entered north Georgia on the 6th had pushed south into central Georgia. Northwest flow aloftcontinued around a deep upper low anchored in the northeast U.S. However, the most unstable air had been pushed furthersouth, mostly into south Georgia. Just before sunset, outflow from thunderstorms in south Georgia pushed north into thesouthern portions of central Georgia, causing isolated thunderstorms to develop. One of these briefly became severe in Wilcoxcounty producing damaging downburst winds. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clarke County3 NW Winterville 13 1500EST 0 0 200.00K 0.00K LightningThe Clarke County 911 Center reported that lightning set a commercial business on fire on Voyles Road, approximately twomiles northwest of Winterville in northeast Clarke county. The business suffered significant damage from the resulting fire.71

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, North and CentralClarke CountyAthens 13 1500EST 0 0 0.50K 0.00K LightningThe Clarke County Emergency Management Director reported that a lightning strike caused minor damage to a home on SingTree Lane.Clarke County2 NW Winterville2 S Athens13 1500EST1520EST 0 0 7.00K 0.00K Thunderstorm Wind (50EG)The Clarke County 911 Center reported that at least 10 trees and a half-a-dozen power lines were down from northwest ofWinterville to south of Athens near the Oconee county line. One tree was down on Simonton Bridge Road, blocking the road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clarke County2 NE Barretts Mill 13 1502EST 0 0 0.50K 0.00K LightningThe Clarke County Emergency Management Director reported that a home on Danielsville Road suffered minor damage from alightning strike.Cherokee County2 NW Canton 13 1516EST1521EST 0 0 300.00K 0.00K Thunderstorm Wind (56EG)The Cherokee County Emergency Management Director reported that three commercial buildings in the John T. Pettit Drivearea sustained roof damage. One of the buildings lost nearly its entire roof. The other two only sustained minor shingledamage. Eight residential structures sustained minor damage. The garage of one home suffered major damage when a largetree fell on the structure. One vehicle was also destroyed by a large downed tree. Dozens of large old hardwood trees weresnapped off in the downtown Canton area, including several near Canton City Hall and on the grounds of the Board ofEducation Administrative Complex. Many other small trees and tree limbs were also down in the area. Widespread poweroutages were observed. Much of the city of Canton was left without power. The damage was the clearly the result of a pulsethunderstorm downburst.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Clarke County1 ENE Oconee Hgts 13 1522EST 0 0 20.00K 0.00K LightningThe Clarke County 911 Center reported that lightning struck an apartment complex approximately three miles northeast ofAthens on Rolling Ridge Drive. Damage from the lightning-related fire was minor to moderate.Clarke County3 ENE Barretts Mill 13 1523EST 0 0 1.00K 0.00K LightningThe Clarke County Emergency Management Director reported that lightning struck a home on Old Pittard Road causing minordamage to the structure.Jackson County2 SSW Red StoneJefferson Jackson Ar13 1525EST1541EST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)The Jackson County 911 Center reported that a portion of a roof was blown off one home and a chimney was blown off anotherhome on Jameston Drive near Jefferson. One tree was also down on Ralph Garrison Road.Cherokee County1 SE CantonWaleskaNote: The estimated wind gust of 50 knots is equivalent to 58 mph.13 1529EST1538EST 0 0 300.00K 0.00K LightningThe Cherokee County Emergency Management Director reported that three homes in unincorporated Cherokee county werestruck by lightning and sustained minor to moderate damage. The public reported that a 60 foot live oak tree at the Departmentof Education building was struck by lightning. The lightning strike caused the tree to fall on an adjacent Nissan Xterra,crushing the vehicle.72

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, North and CentralThe remnants of Tropical Depression Number Five (TD5) were drifting into the region from the southwest around a subtropicalridge located over north Florida. The deep tropical moisture combined with a backdoor cold front across northeast Georgia togenerate scattered to numerous afternoon and evening thunderstorms across north and especially northeast Georgia. Thethunderstorms were very efficient rain producers and were also accompanied by intense cloud-to-ground lightning. Damagingdownburst winds and several lightning incidents were reported with the thunderstorms.Bibb County3 NNE Skipperton 14 1540EST 0 1 0.00K 0.00K LightningThe Macon Telegraph reported that lightning struck a U.S. Postal Service mail carrier while placing mail in a mailbox onRocky Creek Road in Macon. The female mail carrier was taken to the hospital after asking for medical attention, but did notsustain any life-threatening injuries.Emanuel CountyStillmore 14 1722EST 0 0 500.00K 0.00K LightningThe Savannah Morning News reported that lightning struck the high school wing of the David Emanuel Academy nearStillmore in rural southeast Emanuel county. The two-story building, which was constructed in 1904, was set on fire by thelightning strike and completely destroyed. The fire destroyed a science lab, classroom, and wrestling gym.A backdoor cold front lingered from southeast into west central Georgia. The remnants of Tropical Depression Number Five(TD5) remained across the region as well. Scattered to numerous showers and thunderstorms developed near the front duringthe afternoon and evening hours in the warm, moist, unstable air mass residing across the state. While no severe thunderstormswere observed on this day, cloud-to-ground lightning was frequent and intense. A lightning strike from a thunderstorm inEmanuel county destroyed an old schoolhouse and another lightning strike injured a U.S. Postal carrier near Macon.Murray County1 ENE Tennga1 NE Alaculsy17 1100EST1400EST 0 0 3.00K 0.00K Flash FloodThe United States Forest Service reported flash flooding near the merging point of the Jacks River and the Conasauga Riverand several smaller creeks, streams, and tributaries. Several campers and hikers were evacuated from the Alaculsy ValleyCampground within the Cohutta Wildlife Management Agency. Minor flooding was also observed along portions of OldGeorgia Highway 2 and Cable Road to the west near Cisco. Damage was confined to debris removal and minor erosion to afew secondary dirt roads. The heavy rain and erosion also caused a few trees to fall on minor, secondary roads within the area.A cold front approaching from the northwest became stalled across northwest Georgia as a strong subtropical ridge of highpressure built northwestward from the Atlantic. Persistent deep tropical moisture was present across the region as the remnantsof Tropical Depression Number Five (TD5) continued to circle through the southeast and mid-south region on the west side ofthe subtropical ridge. An area of showers and thunderstorms persisted during the morning and into the early afternoon fromnorthwest Alabama into far northwest Georgia and eastern Tennessee. A very small localized area of rainfall in excess of sixinches was observed near the Tennessee border in northern Murray county, which resultant flash flooding along the Jacks andConasauga Rivers in the Alaculsy Valley Campground.Gwinnett County2 W Carolina 20 1600EST 0 0 25.00K 0.00K LightningThe Gwinnett Daily Post of Lawrenceville reported that lightning struck a home on Woods River Lane in Duluth. Firefighterswere able to confine the fire to one wall, keeping damage to a minimum.Cherokee County1 WNW Waleska 20 1743EST2300EST 0 0 15.00K 0.00K Flash FloodThe Cherokee County Emergency Management Director reported flash flooding along Byrd Creek, five miles north-northwestof Canton, and along Shoal Creek, one mile west-northwest of Waleska. At least three feet of water from Byrd Creek wasoverflowing Sardis Circle north-northwest of Canton, and approximately a foot of water was flowing over George Gray Lane,just west-northwest of Waleska. Minor erosion to the roads was observed, along with subsequent debris removal.73

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, North and CentralButts County1 ENE Stark 20 2013EST 0 0 5.00K 0.00K LightningThe Jackson Progress Argus reported that lightning struck a home on Halls Bridge Road, which happened to be the home of theButts county sheriff. Only minor damage was reported to the structure.Butts CountyJackson 20 2013EST 0 0 150.00K 0.00K LightningThe Jackson Progress Argus reported that lightning struck a home on First Street near downtown Jackson. The structuresustained major fire and smoke damage as a result of the lightning strike.Gwinnett County1 S Lilburn 20 2203EST 0 0 200.00K 0.00K LightningThe Gwinnett Daily Post of Lawrenceville reported that lightning struck a home on Hambrick Drive. The lightning struck theattic area of the home. The resulting fire caused extensive damage to the attic and moderate damage to the second floor of thehome.Gwinnett County2 NE Gloster 20 2235EST 0 0 100.00K 0.00K LightningThe Gwinnett Daily Post reported that lightning struck the chimney of a home on Congress Parkway in Lawrenceville. Thechimney suffered moderate damage and a subsequent fire caused damage to the first and second floors of the home, mostlyfrom smoke.Jackson County2 ESE Marcus 20 2300EST 0 0 10.00K 0.00K LightningThe Athens Banner Herald reported that lightning struck a home on W. H. Rayes Road near Jefferson. The lightning strikecaused damage to the electrical system of the home. However, no fire was reported.Jackson County1 W Sells 20 2330EST 0 0 150.00K 0.00K LightningThe Athens Banner Herald reported that lightning struck a home on Marshall Clark Road. The gas line to the home wasignited, fueling a large fire at the scene.Jackson County1 ESE Hoschton 21 0200EST 0 0 100.00K 0.00K LightningThe Athens Banner Herald reported that lightning struck a home on Antrim Glen Road. The structure suffered moderate fireand smoke damage.While a strong subtropical ridge persisted across most of the southern United States, the remnants of Tropical DepressionNumber Five (TD5) continued to circulated around the subtropical ridge. With the ridge at this time centered near NewOrleans, the remnants of tropical depression number five had once again moved into Georgia. Meanwhile...a weak frontalsystem had stalled across north Georgia, being pushed southward by a short wave moving through the Ohio Valley. Thecombination of the front the remnants of TD5 resulted in numerous thunderstorms. While none of the thunderstorms becamesevere, frequent lightning and very heavy rain accompanied many of the storms. Localized flash flooding was reported inCherokee county in north central Georgia during this event. By far, however, the biggest issue on this day was frequent andintense cloud-to-ground lightning, which caused a rash of house fires in several northeast and east central Georgia counties.The thunderstorms persisted into the early morning hours of the 21st across northeast Georgia between Athens, Lawrenceville,and Commerce.White County4 S Oculus2 WNW Cleveland21 1215EST1732EST 0 0 400.00K 0.00K Flash Flood74

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, North and CentralThe White County Emergency Management Director reported significant flash flooding near and just south of Cleveland. Themost significant incident occurred along a service road of U.S. Highway 129, approximately one mile south of Cleveland.Significant erosion, six to eight feet deep in spots, occurred in the area resulting in a pavement collapse. The collapsedpavement resulted in a sink hole causing damage to a car wash and adjacent Sonic Drive In restaurant along U.S. Highway 129.Most of the damage was in the form of collapsed awnings and damage to adjacent property at the drive in. In addition, CoxCreek overflowed its banks onto U.S. Highway 129 near Campbell Street with four feet of water and onto Quillian Street withtwo feet of water. Freeman Creek overflowed its banks onto Asbestos Road with one foot of water. A secondary stream thatflows into Cox Creek overflowed its banks flooding Cementary Street and Wildord Ash Parkway with one foot of water.Portions of the Creekside Deli Parking Lot at Nachoochee Road and U.S. Highway 129 were also flooded.A stationary, backdoor front lingered across northeast Georgia. The remnants of Tropical Depression Number Five (TD5) weremaking one final revolution through Georgia around a large subtropical ridge across the mid-south. Deep tropical moistureremained firmly entrenched across the state. In fact, the air mass remained incredibly moist with dewpoints in the mid to upper70s across much of north and central Georgia. Thunderstorms, with heavy rain, had plagued northeast Georgia throughout theearly morning and mid-morning hours and persisted across the far northeastern counties into the early afternoon. By latemorning, rainfall totals of six inches, locally more, were common across the northwest half of White county. The heavyrainfall in the steep terrain common to this area resulted in flash flooding.Damage to a Sonic Restaurant along U.S. Highway 129 just south of Cleveland caused by a flash flood.Six inches or more of rain fell in the area during the early and mid-morning hours of August 21st.The resulting rapid water currents in the surrounding drainage system caused significant erosion. Photographcourtesy of the White County EM Dir.Pickens CountyMarblehillNelson26 1423EST1435EST 0 0 25.00K 0.00K Thunderstorm Wind (56EG)The Pickens and Cherokee County Emergency Management Directors report that a strong thunderstorm downburst had downednearly 100 trees near the Cherokee county, near and just north of Tate. At least nine power poles were also down, includingone main power transmission line. Several roads were blocked from downed trees.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Cherokee County3 N Ball Ground 26 1435EST1440EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)The Cherokee County Emergency Management Director reported that the same thunderstorm downburst that began just northof Nelson in Pickens county continued south into extreme northern Cherokee county before dissipating. More than a dozentrees were down in the extreme northern part of the county north of Ball Ground, near the Pickens county line.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.75

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, North and CentralDooly County5 NE Byromville4 NW Vienna26 2145EST2230EST 0 0 10.00K 15.00K Thunderstorm Wind (54EG)The Dooly County Emergency Management Director reported that a strong thunderstorm downburst downed 20 mature pecantrees and damaged another 30 mature pecan trees between Vienna and Byromville. In addition, a 150-year old, six-footdiameter oak tree was blown down in the same thunderstorm wind gusts, falling on and destroying the porch of a home. It wasfurther noted that a field of corn was flattened by the strong winds.A weak frontal boundary remained stalled across central Georgia. A broad low pressure trough was exiting the eastern U.S. Astrong subtropical ridge was on the verge of building from the Ohio Valley into the northeast U.S. during this period. With theupper trough exiting and weakening across the eastern U.S., the frontal boundary remained stalled and eventually washed out.This left the air mass very moist and unstable across the region. Residual tropical moisture remained across the region, thankslargely to the lingering remnants of Tropical Depression Number Five. As a result, scattered thunderstorms developed duringthe afternoon across north Georgia and persisted into late evening across the central part of he state. Note: The estimated windgust of 54 knots is equivalent to 62 mph.Henry County1 SSW Mc Donough 27 0027EST0030EST 0 0 0.00K 0.00K Hail (1.00)Gwinnett CountyNorcrossDuluthThe public observed quarter-sized hail near McDonough.27 0145EST0200EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)The public reported that several trees were down in and near Duluth, especially near the Chattahoochee River.Walton County1 SW Walnut Grove5 E LoganvilleNote: The estimated wind gust of 50 knots is equivalent to 58 mph.27 0205EST0220EST 0 0 0.00K 0.00K Hail (0.88)A storm spotter observed nickel to slightly larger than nickel-sized hail east of Loganville on Bay Creek Church Road. TheWalton County Emergency Management Director relayed several reports of pea-sized hail. Radar data suggests that pea tonickel-size hail likely fell further west across the county as well, coincident with several reports of thunderstorm wind damage.Walton County1 SW Walnut Grove5 E Loganville27 0205EST0220EST 0 0 5.00K 0.00K Thunderstorm Wind (43EG)The Walton County Emergency Management Director reported that a tree was down on a home near Loganville, causingdamage to the structure. The Walton Electric Management Cooperative reported that a tree was down on a power line nearWalnut Grove. The public reported that two trees were down approximately five miles east of Loganville. The downed treesbroke a fence.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Troup County1 SE Lees Crossing 27 1450EST 0 0 10.00K 0.00K Thunderstorm Wind (36EG)The La Grange Daily News reported that a large tree limb was blown from a tree during strong thunderstorm wind gustscausing it fall on a vehicle traveling on Broad Street near Springdale Street in La Grange. Inside the vehicle were a mother andher three children. Although none of the three children were injured, the mother had to be pulled from the vehicle and taken toa local hospital for surgery.Note: The estimated wind gust of 36 knots is equivalent to 41 mph.Johnson County4 NE Wrightsville 27 1615EST1643EST 0 0 250.00K 0.00K Thunderstorm Wind (52EG)The Johnson County Emergency Management Director reported that a strong thunderstorm downburst, wind gusts of 60 mph orgreater, blew down dozens of trees and several power lines from northeast of Wrightsville to three miles west-southwest ofWrightsville. Six homes across this path sustained minor to moderate damage from downed trees. Several trees were downand a trampoline was blown away from a residence near U.S. Highway 319 on Tucker Grove Church Road west ofWrightsville.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.76

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, North and CentralFloyd County1 W Rome 27 1650EST1655EST 0 0 25.00K 0.00K Thunderstorm Wind (39EG)The Floyd County Emergency Management Director reported that five trees were blown down by a downburst from a smallthunderstorm. One of the trees fell on a home, just west of Rome, causing damage to the structure.The upper trough that had lingered across the northeast and mid-Atlantic region was moving out and a large vertically stackedhigh pressure area was rapidly replacing the trough across the northeast and mid-Atlantic. During the next few days, this highpressure area would drift south toward Georgia, finally shutting off the incessant thunderstorm activity. However, deep tropicalmoisture lingered along and south of a stationary front, that during the early morning was draped west-to-east across northcentral and northeast Georgia. The front served as a focusing mechanism for persistent redevelopment of thunderstorms. Tworounds of thunderstorms, several severe, plagued the area on August 27th. The first occurred across north central and northeastGeorgia, near Atlanta and Athens, during the early morning hours between midnight and 4 am EDT. The second roundoccurred during the mid to late afternoon mainly across east central. Note: The estimated wind gust of 39 knots is equivalent to45 mph.GEORGIA, NortheastHabersham County1 W Batesville1 NW Clarkesville05 1805EST1819EST 0 0 Thunderstorm Wind (50EG)Several trees were blown down from the Batesville area to north of Clarkesville.Thunderstorms moved into northeast Georgia during the early evening hours. One of the storms produced some wind damage.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County1 NNW Lavonia 06 1500EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on Rainbow Dr in Lavonia.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County3 ESE Carnesville 06 1500EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on Jackson Bridge Rd about 3 miles east southeast of Carnesville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Elbert County4 SSE Ethridge 06 1536EST 0 0 Thunderstorm Wind (50EG)Trees were blown down over the southern part of the county, including on Jones Ferry Rd and River Rd between 5 and 7 milessouth of Elberton.A cold front moved into northeast Georgia during the afternoon hours. The front triggered thunderstorms over the southernmountains of North Carolina which then moved southeast, crossing much of northeast Georgia. Some of the storms producedareas of damaging wind. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rabun CountyBlalock1 NNW Checkero21 1300EST1430EST 0 0 0.00K 0.00K Flash FloodA portion of highway 76 was closed due to flooding about 2 miles southeast of Clayton. Also, a bridge over Ramey Rd wasflooded in the Lakemont community and a creek flooded a portion of Lake Rabun Rd about 8 miles south southwest ofClayton.An area of showers and thunderstorms became anchored over the southeast slopes of the Appalachian Mountains during theafternoon hours. The storms produced very heavy rain which lead to a few instances of flash flooding over Rabun County.77

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, SoutheastScreven County2 NNE Mears 06 1820EST1821EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement reported a tree down on a power line at the intersection of Oglethorpe Trail and Smith Lake Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Screven County1 W Sylvania 06 1920EST1921EST 0 0 6.00K 0.00K Thunderstorm Wind (50EG)A electric company reported several trees down on power lines in Sylvania.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Screven County1 W Ogeechee 06 1955EST1956EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A electric company reported trees down on power lines between Rocky Ford and Dover.Widespread surface heating and continued deep moisture advection ahead of an approaching cold front from the northwestallowed for very unstable atmospheric conditions with CAPE values between 3500 to 4000 J/kg Friday afternoon and evening.As a 500 mb shortwave tracked along the southern periphery of a broad through and across the region, severe thunderstormsdeveloped across the area. Severe thunderstorms initially developed along the seabreeze in the area late in the afternoon. Moreorganized severe storms tracked into the area from the Midlands during the evening and pushed all the way into portions ofsoutheast Georgia during the early overnight hours. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.GAZ119Coastal Chatham07 1000EST1900EST 0 2 0.00K 0.00K Rip CurrentSignificant long period swells began along the Georgia coast as distant tropical storm Colin made a north shift well offshore.As swell began to increase over the area, persistent northeast surface winds along a Perigean spring tide further enhancedconditions for rip currents during the afternoon and early evening hours.08 1400EST1900EST 0 0 0.00K 0.00K Rip CurrentTen to eleven second period swells were present as distant tropical storm Colin made a north shift well offshore. Persistentnortheast surface winds along with an afternoon sea breeze further enhanced the swell from Colin and and produced a strongwind wave component. As 15 mph winds developed along the afternoon sea breeze, several rip currents were reported along thebeaches in southeast Georgia.Chatham County1 E Savannah 20 1703EST1704EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)The public reported multiple 5 to 7 feet tree limbs down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chatham CountySavannah 20 1705EST1706EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An NWS employee estimated 60 mph winds on River Street in Savannah.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Chatham County2 NW Vernonburg 20 1757EST1845EST 0 0 0.00K 0.00K Flash FloodLaw enforcement reported high water had closed the intersection of Abercorn Street and Largo Drive. High water had alsoclosed the intersection of Montgomery Crossroad and Waters Avenue.78

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, SoutheastBryan County1 NW Keller 20 1853EST1854EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement reported one tree down near the intersection of Highway 144 and Rathlin Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Evans County3 SW Daisy 20 1922EST1923EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement reported a tree down on South Rogers Road.A backdoor cold front moved in from the north over portions of southeast Georgia. This provided enhanced lift in a very moistand unstable atmosphere over the forecast area during late evening and early overnight hours. As thunderstorms developed theybecame clustered and pulsed to produce isolated severe winds. Heavy rains fell in and around the Savannah metro near hightide, thus enhancing flooding to prone locations. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chatham CountyBurroughs 24 1600EST1601EST 0 0 0.00K 0.00K Hail (0.88)The media relayed a report of nickel size hail on Chavis Road.Liberty County2 SSE Retreat 24 1620EST1621EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Law enforcement reported a tree down on a powerline near the intersection of Highway 17 and Interstate 95.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Tattnall County6 NNW Cobbtown 24 1815EST1816EST 0 0 4.00K 0.00K Thunderstorm Wind (55EG)An electric company reported trees blown down near Tattnall Georgia.Several mid level shortwaves progressed through the Southeast during the evening hours. As these shortwaves encountered aninland moving sea breeze a few strong thunderstorms developed. High DCAPE values along with steep low level lapse ratescreated an environment that suggested strong downbursts possible with any thunderstorm that developed. Note: The estimatedwind gust of 55 knots is equivalent to 63 mph.Chatham County2 SSE Fernwood 26 1530EST1531EST 0 0 0.00K 0.00K Hail (0.75)A trained spotter reported dime to penny size hail.Chatham County1 S Williams 26 1552EST1553EST 0 0 1.25K 0.00K Thunderstorm Wind (50EG)The public reported a wooden fence and several large limbs blown down.A stationary front was present over eastern Georgia during peak heating hours. An upper level trough began to round thesouthern periphery of a large longwave trough, thus forcing the front towards the East Coast during the evening. As thisoccurred, a few thunderstorms developed and resulted in marginal hail and strong downbursts. Note: The estimated wind gustof 50 knots is equivalent to 58 mph.79

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GEORGIA, SouthwestGAZ125Dougherty01 1700EST1800EST 0 0 0.00K 0.00K HeatHigh heat indices of 110 or higher effected the Albany area during the afternoon of August 1st.Turner County1 S Rebecca 01 2050EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A couple of trees were blown down along Waterloo Rebecca Highway and Cherokee Lane. The monetary damage figureprovided is a rough estimate.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Worth County3 NNE Isabella 01 2120EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Numerous trees were blown down across the county. A tree fell on the Georgia Forestry building, and trees were also reporteddown along Isabella-Terrell Road, Dough Hill Road, and Old Mill Road. The monetary damage figure provided is a roughestimate.Evening thunderstorms knocked down numerous trees across Worth and Turner Counties. Note: The estimated wind gust of 55knots is equivalent to 63 mph.Worth CountySylvester 07 1750EST1930EST 0 0 0.00K 0.00K Heavy RainHeavy rainfall from a slow moving thunderstorm caused some minor urban flooding in Sylvester. Water covered some roadsand poor drainage area, but no damage or injuries occurred. Rainfall estimates were between 3 and 5 inches.Heavy rain from a slow moving thunderstorm caused minor flooding in Worth County.HAWAIIHIZ005-008-013>015-017>019-021-023>024-026>027Big Island Interior - Kohala - Kona - Lanai Makai - Lanai Mauka - Leeward Haleakala - Maui CentralValley - Maui Leeward West - Maui Windward West - Molokai Leeward - Oahu Koolau - Oahu SouthShore - Olomana - South Big Island01310000HST2359HST 0 0 0.00K 0.00K DroughtVery little rain fell in drought-stricken areas across Hawaii in August. County officials maintained water restrictions in thoselocales.HIZ001>003-005-013>014-016-018-020>021-023>025Big Island North and East - Kahoolawe - Kauai Leeward - Kauai Windward - Kona - Lanai Makai -Leeward Haleakala - Maui Leeward West - Molokai Leeward - Niihau - Oahu South Shore - South BigIsland - Windward Haleakala03052000HST0600HST 0 0 0.00K 0.00K High SurfA swell from a storm low in the southern hemisphere generated surf of 5 to 8 feet along the south-facing shores of all theislands. There were no reports of serious property damage or injuries.HIZ027Big Island Interior22310800HST1700HST 0 0 0.00K 0.00K WildfireA brush fire blackened almost 1400 acres near the US Army's Pohakuloa Training Area (PTA) on the south-facing slope ofMauna Kea on the Big Island of Hawaii. The fire began near Mauna Kea State Recreation Area, about a quarter-mile east ofthe PTA main gate, on Sunday morning, August 22nd. The blaze was difficult to contain because of its elevation - above 6000feet - and because of the dry and breezy conditions the firefighters encountered. The fire also forced county officials to close aportion of Saddle Road that had been affected by the blaze from Sunday until Wednesday morning, the 25th. The blaze wascontained by the end of the month. No significant injuries or property damage were reported, though the fire destroyed criticalhabitat and food sources for native palila forest birds. Officials determined that the fire had been deliberately set.80

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010HAWAIIHIZ007Oahu North Shore31 1100HST2100HST 0 0 0.00K 0.00K WildfireDry conditions helped sustain a brush fire near Waialua on the island of Oahu. The blaze scorched about 100 acres, destroyedat least one unoccupied agricultural building, and damaged some crops near Thompson's Corner on the 31st of the month. Thecost of the damages was not available. No injuries were reported. The fire also closed a section of Farrington Highwaythrough the afternoon hours as firefighters tried to contain the blaze. Fire officials determined the fire had been deliberately set.HIZ005-008-013>015-017>019-021-023>024-026>027Big Island Interior - Kohala - Kona - Lanai Makai - Lanai Mauka - Leeward Haleakala - Maui CentralValley - Maui Leeward West - Maui Windward West - Molokai Leeward - Oahu Koolau - Oahu SouthShore - Olomana - South Big Island01310000HST2359HST 0 0 0.00K 0.00K DroughtVery little rain fell in drought-stricken areas across Hawaii in August. County officials maintained water restrictions in thoselocales.HIZ001>003-005-013>014-016-018-020>021-023>025Big Island North and East - Kahoolawe - Kauai Leeward - Kauai Windward - Kona - Lanai Makai -Leeward Haleakala - Maui Leeward West - Molokai Leeward - Niihau - Oahu South Shore - South BigIsland - Windward Haleakala03052000HST0600HST 0 0 0.00K 0.00K High SurfA swell from a storm low in the southern hemisphere generated surf of 5 to 8 feet along the south-facing shores of all theislands. There were no reports of serious property damage or injuries.HIZ027Big Island Interior22310800HST1700HST 0 0 0.00K 0.00K WildfireA brush fire blackened almost 1400 acres near the US Army's Pohakuloa Training Area (PTA) on the south-facing slope ofMauna Kea on the Big Island of Hawaii. The fire began near Mauna Kea State Recreation Area, about a quarter-mile east ofthe PTA main gate, on Sunday morning, August 22nd. The blaze was difficult to contain because of its elevation - above 6000feet - and because of the dry and breezy conditions the firefighters encountered. The fire also forced county officials to close aportion of Saddle Road that had been affected by the blaze from Sunday until Wednesday morning, the 25th. The blaze wascontained by the end of the month. No significant injuries or property damage were reported, though the fire destroyed criticalhabitat and food sources for native palila forest birds. Officials determined that the fire had been deliberately set.HIZ007Oahu North Shore31 1100HST2100HST 0 0 0.00K 0.00K WildfireDry conditions helped sustain a brush fire near Waialua on the island of Oahu. The blaze scorched about 100 acres, destroyedat least one unoccupied agricultural building, and damaged some crops near Thompson's Corner on the 31st of the month. Thecost of the damages was not available. No injuries were reported. The fire also closed a section of Farrington Highwaythrough the afternoon hours as firefighters tried to contain the blaze. Fire officials determined the fire had been deliberately set.IDAHO, NorthLemhi County1 NE Salmon 05 1454MST1545MST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A square 16 by 16 cinder block was moved completely off a plywood sheet and the plywood was blown away. Gutters wereblown down. Some metal lawn furniture was blown off the porch. Several bails of peat moss were blown around.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.81

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IDAHO, NorthLemhi County1 NE Salmon 05 1455MST1545MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Winds were measured by the Salmon AWOS.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Lemhi County1 NE Salmon 05 1505MST1545MST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported shingles blown off their roof in Salmon, as well as downed trees on Highway 93 south betweenSalmon and Challis.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lemhi County4 N Carmen 05 1651MST1700MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Winds were measured by the Kriley Creek RAWS.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Idaho County2 NNE White Bird 05 1815PST1930PST 0 0 0.00K 0.00K Hail (0.88)A trained spotter reported pea to nickel size hail that he had to use a snow shovel to clear the accumulations off his deck. Healso reported 0.50 inches of rain with the storm.Idaho CountyGrangeville 05 1856PST1930PST 0 0 0.00K 0.00K Hail (1.00)Severe thunderstorms developed in the afternoon ahead of a trough oriented along the Pacific northwest coast. Wind gusts up to65 mph were observed with these thunderstorms as well as hail up to an inch in diameter.Lemhi County1 NE Salmon 06 1536MST1551MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Wind gust reported from Salmon RAWS.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Lemhi County4 N Carmen 06 1551MST1610MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)Wind gust reported from Kriley Creek RAWS.A very unstable atmosphere allowed strong thunderstorms to develop over north central Idaho. The main threat with thesestorms was strong wind, with some reports of gusts up to 60 mph. Note: The measured wind gust of 54 knots is equivalent to62 mph.Idaho County54 ENE Lowell 10 1451PST1506PST 0 0 0.00K 0.00K Hail (1.75)A US Forest Service trail crew reported hail up to 1.75 inches in diameter.Lemhi County4 N Carmen 10 1500MST1515MST 1 0 0.00K 0.00K LightningA 37 year old man riding a horse was struck by lightning and killed. M37OU82

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IDAHO, NorthIdaho County1 N Freedom 10 1855PST1907PST 0 0 0.00K 0.00K Heavy RainLaw enforcement reported a mudslide over Highway 95 near Slate Creek due to heavy rain.Idaho County1 S Lowell 10 2000PST2015PST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)IDAHO, NorthwestSevere thunderstorm winds blew down a large tree on to a cabin at Three Rivers Resort in Lowell. Very heavy rain wasblowing sideways.A closed low over the Pacific Northwest pumped very moist and unstable air into portions of north central Idaho, allowing afew strong to severe thunderstorms to develop. Large hail, up to the size of golfballs, and deadly lighting. A Salmon man losthis life due to a lightning strike. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.IDZ004Central Panhandle Mountains20311300PST1700PST 0 0 0.00K 0.00K WildfireIDAHO, SoutheastLightning sparked a complex of large fire south of Avery in rural Shoshone County. The Sawtooth, Needle, and Foehl firesburned 557 acres.Bingham CountyAberdeen 05 1850MST1900MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Sixty mph wind gust at Aberdeen.Sixty mph wind gust at Aberdeen. Note: The measured wind gust of 52 knots is equivalent to 60 mph.IDZ022-031Big and Little Wood River Region - South Central Highlands06141500MST1200MST 0 0 0.00K 0.00K WildfireLightning started the 8,000 acre Bear Trap wildfire east of Carey near Laid Law Park.Bingham County5 NW Moreland 06 1525MST1535MST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)IDZ021Sixty-one mph wind gust 5 miles northwest of Moreland.Several reports of severe thunderstorm winds on August 6th. Note: The measured wind gust of 53 knots is equivalent to 61mph.Lower Snake River Plain06141600MST0900MST 0 0 0.00K 0.00K WildfireLightning strikes caused a wildfire 8 miles northeast of American Falls reaching 12,500 acres. No structures were damaged bythe fire.Butte County18 ESE Arco 06 1605MST1620MST 0 0 0.00K 0.00K Thunderstorm Wind (66MG)Seventy-six mph wind gust at Central Facilities INL mseonet site.Note: The measured wind gust of 66 knots is equivalent to 76 mph.83

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IDAHO, SoutheastButte County20 ESE Arco 06 1605MST1620MST 0 0 0.00K 0.00K Thunderstorm Wind (58MG)Sixty-seven mph wind gust at Critical Infrastructure INL mesonet site.Note: The measured wind gust of 58 knots is equivalent to 67 mph.Bonneville County(IDA)Fanning Fld Ida 06 1607MST1620MST 0 0 0.00K 0.00K Thunderstorm Wind (62MG)Seventy-one mph wind gust at Fanning Field in Idaho Falls.Note: The measured wind gust of 62 knots is equivalent to 71 mph.Madison CountySugar City 06 1700MST1715MST 0 0 0.00K 0.00K Thunderstorm Wind (60MG)Sixty-nine mph wind gust at Sugar City.Note: The measured wind gust of 60 knots is equivalent to 69 mph.Oneida CountyMalad City 06 1700MST1720MST 0 0 25.00K 0.00K Thunderstorm Wind (61EG)Large tree fell on top of a home in Malad City. Residents had to evacuate home.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Madison CountyRexburg 06 1701MST1715MST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)Two power lines down with one caused by a large tree falling on it.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Bannock CountyArimo 06 1720MST1730MST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Roof damage in Arimo reported due to thunderstorm winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Madison County15 E Sugar City 06 1720MST1730MST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Trained spotter reported shingles blowing off of a roof 5 miles west of Clementsville.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Bear Lake CountyMontpelier 06 1739MST1750MST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)IDZ018Spotter reported 61 mph wind gust.Several reports of severe thunderstorm winds on August 6th. Note: The estimated wind gust of 53 knots is equivalent to 61mph.Sawtooth Mountains20280001MST1200MST 0 0 0.00K 0.00K WildfireA 2,000 acre wildfire caused by lightning strike occurred 15 miles west of Stanley. It initially caused road closures andcampground evacuations. No property damage occurred.84

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IDAHO, SoutheastIDZ022South Central Highlands21261600MST1200MST 0 0 0.00K 0.00K WildfireA 6,700 acre wildfire near Arbon was caused by a lighting strike. No structural damage in the open land fire.Franklin CountyPreston 22 1558MST1612MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Preston mesonet site reported sixty-four mph wind gust.Sixty-four mph wind gust in Preston. Note: The measured wind gust of 56 knots is equivalent to 64 mph.IDZ020Upper Snake River Plain27281400MST2300MST 0 0 0.00K 0.00K WildfireA fire which began 1 mile northeast of Atomic City burned 14,139 acres on the INL site. The fire temporarily closed Highway20 and non-essential personnel were evacuated from the site.Jefferson County6 SSE Lorenzo 28 1236MST1250MST 0 0 0.00K 0.00K Hail (1.00)IDAHO, SouthwestOne inch hail fell 6 miles south southeast of Lorenzo.One inch hail fell 6 miles south southeast of Lorenzo.Twin Falls CountyTwin Falls 05 1455MST1545MST 0 0 0.00K 0.00K Flash FloodTrained spotters reported heavy rain and street flooding in downtown Twin Falls.Valley County9 ESE Alpha 05 1805MST1830MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Boise Forest Service Dispatch reported wind damage near Deadwood Reservoir including downed trees and power lines atSilver Creek Campground.An area of strong thunderstorms developed over the West Central Mountains of Idaho and downed trees along anapproximately 50 mile path. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Payette CountyFruitland 06 1930MST2130MST 0 0 0.00K 0.00K Flash FloodPayette County Sheriff's Office reported flash flooding that stalled cars in Fruitland and a mud slide across State Highway 52east of Payette.A weak shortwave trough combined with afternoon surface heating to produce strong to severe convection across parts ofPayette County in Southwest Idaho on the 6th.Owyhee County3 SSE Oreana 08 1810MST1820MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A trained spotter near Oreana, Idaho reported wind gusts up to 60 MPH.Thunderstorms continued across parts of Southeast Idaho on the 8th with strong to severe convection along the Snake Riverplain. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.85

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IDAHO, SouthwestElmore CountyGlenns Ferry 09 1700MST1720MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Heavy rain with strong winds, including power outages and downed tree limbs, were reported by a trained spotter and thepublic.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Valley County8 E Mc Call 09 1745MST1815MST 0 0 0.00K 0.00K Hail (1.00)Reports of hail up to 1 inch in diameter covering the ground were received from the public at Lake Fork.A pair of upper level lows across the Pacific Northwest and Intermountain regions provided the needed instablility for severeafternoon convection over Southwest Idaho.Jerome County1 SW Jerome 15 2145MST2215MST 0 0 0.00K 0.00K Thunderstorm Wind (58MG)Jerome County Sherrif dispatch reported trees and power lines down in the town of Jerome and the ASOS reported a wind gustof 67 MPH.Isolated thunderstorm development occured over South Central Idaho on the 15th as a low pressure system remained off theCalifornia coast. Note: The measured wind gust of 58 knots is equivalent to 67 mph.Owyhee County30 S Triangle7 SE Grandview21 1850MST1915MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Brace Flat RAWS recorded a wind gust of 64 MPH.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Ada County5 SW (BOI)Gowen Fld Boise 21 2005MST2035MST 0 70 0.00K 0.00K Thunderstorm Wind (59MG)The BOI ASOS measured a wind gust of 68 MPH and several reports were received for wind damage including downed treesand power lines. Minor injuries were reported from the Western Idaho Fair as a result of temporary structures collapsing.Boise County8 W Idaho CityGrimesOwyhee County4 NNE Triangle13 NNE GrandviewNote: The measured wind gust of 59 knots is equivalent to 68 mph.21 2100MST2130MST 1 0 0.00K 0.00K Thunderstorm Wind (61EG)Boise County Sherrif's dispatch reported a large number of trees down on and around Grimes Creek Road including one fatalityat Grimes Creek. M45CANote: The estimated wind gust of 61 knots is equivalent to 70 mph.21 2130MST2155MST 0 0 0.00K 0.00K Thunderstorm Wind (67MG)Triangle RAWS recorded a wind gust of 77 MPH.Note: The measured wind gust of 67 knots is equivalent to 77 mph.IDZ014Upper Treasure Valley21222300MST0100MST 0 0 100.0K 0.00K WildfireOwyhee County30 S Triangle15 N Grandview21222330MST0000MST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)Brace Flat RAWS recorded a wind gust of 63 MPH.86

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IDAHO, SouthwestA dry cold front moving across Eastern Oregon and Idaho set off a series of mainly dry thunderstorms generating severeoutflow winds in the Treasure Valley, including Boise, and the Snake River plain throughout the evening of the 21st. Note:The measured wind gust of 55 knots is equivalent to 63 mph.IDZ012>015Boise Mountains - Lower Treasure Valley - Southwest Highlands - Upper Treasure Valley26 1730MST2200MST 0 0 0.00K 0.00K High WindA strong cold front swept across Southeast Oregon and Southwest Idaho on the 26th bringing sustained high winds over a 3 to4 hour period.ILLINOIS, CentralILZ040>057-061>063-066>068-071>073Cass - Champaign - Christian - Clark - Clay - Coles - Crawford - Cumberland - De Witt - Douglas - Edgar- Effingham - Jasper - Lawrence - Logan - Macon - Mason - Menard - Morgan - Moultrie - Piatt -Richland - Sangamon - Schuyler - Scott - Shelby - Vermilion03041200CST1800CST 0 0 0.00K 0.00K Excessive HeatA large upper-level ridge of high pressure over the southern U.S. produced an extended period of hot and humid weather acrosscentral Illinois. With actual air temperatures well into the 90s and dewpoints in the upper 70s...heat index readings soaredabove 105 degrees....with the highest values noted along and south of a Rushville...to Lincoln...to Danville line.Cass CountyVirginia 04 1535CST1540CST 0 0 20.00K 0.00K Thunderstorm Wind (52EG)Several trees were blown down in Virginia.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cass CountyVirginia 04 1535CST1540CST 0 0 1.80K 0.00K Thunderstorm Wind (52EG)A metal carport was blown across a street, causing damage to the roof and side of Parlier's Auto Body.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Vermilion County2 W Rossville 04 1618CST1619CST 0 0 0.00K 0.00K Hail (0.75)Vermilion County1 N Danville 04 1713CST1718CST 0 0 30.00K 0.00K Thunderstorm Wind (52EG)Numerous trees and power lines were blown down on the north side of Danville.A cold front dropping southward into a very hot and humid airmass triggered widely scattered thunderstorms along and southof a Pittsfield to Danville line during the afternoon and early evening hours of August 4th. A few of the storms became severe,producing penny-sized hail and minor wind damage. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.ILZ040-042-047>057-061>063-066>068-071>073Cass - Christian - Clark - Clay - Coles - Crawford - Cumberland - Douglas - Edgar - Effingham - Jasper -Lawrence - Logan - Macon - Menard - Morgan - Moultrie - Richland - Sangamon - Schuyler - Scott -Shelby09141200CST1400CST 0 0 0.00K 0.00K Excessive HeatA large upper-level ridge of high pressure over the southern U.S. produced an extended period of hot and humid weather acrosscentral Illinois from August 9th through August 14th. With actual air temperatures well into the 90s and dewpoints in the upper70s...heat index values soared above 105 degrees....with readings occasionally in excess of 110 degrees along and south of aShelbyville to Paris line.87

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, CentralFulton County4 SSW Manley2 N Bryant09102230CST0130CST 0 0 0.00K 0.00K Flash FloodRainfall rates of more than 2.00 inches in an hour produced areas of flash flooding in northwest portions of Fulton County.Several rural roads were inundated and impassable as a result.A weak stationary front draped across central Illinois provided the focus for scattered strong thunderstorms in parts of westcentral Illinois from late in the evening August 9th into the early morning of August 10th. Several thunderstorms trainingacross already saturated areas of Fulton County produced flash flooding.Fulton CountyCanton 10 1829CST1834CST 0 0 12.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down on North Main Street in Canton. Numerous tree branches were knocked down around town.Champaign County2 NW Tolono1 E PhiloNote: The estimated wind gust of 52 knots is equivalent to 60 mph.10 1845CST2200CST 0 0 0.00K 0.00K Flash FloodIsolated, slow moving thunderstorm produced copious amounts of rain in a small part of south central Champaign County.Rainfall rates of 1.50 to 2.00 inches of rain for nearly two hours produced flash flooding which inundated several rural roadsand parts of U.S. Route 45 south of Tolono.Schuyler County3 WSW Brooklyn3 NNE Rushville10111900CST0000CST 0 0 0.00K 0.00K Flash FloodThunderstorms with heavy rainfall produced rates of 1.50 to 2.00 inches of rain per hour for 2 to 3 hours. This resulted in theflash flooding of rural roads in most of western and central Schuyler County. Total rainfall amounts ranged from 3.00 to 5.00inches in much of the impacted area.Fulton County3 SW London Mills3 WSW Middlegrove10112000CST0100CST 0 0 0.00K 0.00K Flash FloodIsolated thunderstorms in northwest Fulton County produced rainfall rates of 1.50 inches per hour for at least two hours whichresulted in flash flooding. The flooding inundated most rural roads in the area.Fulton County6 WSW Astoria4 WNW Table Grove10112015CST0100CST 0 0 0.00K 0.00K Flash FloodThunderstorms produced heavy rainfall, with rates of 1.50 inches per hour for at least two hours during the late evening ofAugust 10th in southwest Fulton County. U.S. Route 136 from Ipava to the county line was covered with two to three feet ofwater in spots and was closed for a few hours.Schuyler County1 ESE Ray2 NE Sheldons Grove10112015CST0100CST 0 0 0.00K 0.00K Flash FloodIsolated thunderstorms in eastern Schuyler County produced heavy rainfall, with rates of 1.50 inches per hour for at least twohours during the late evening of August 10th. Rural roads, many of which were damaged in flooding the previous month, wereinundated and impassable.Widely scattered thunderstorms developed along a stationary frontal boundary during the evening of August 10th into the earlymorning of August 11th. The storms were mainly confined to locations along and north of a Rushville to Danville line. Onewind damage report was received from northern Fulton County, while a few other thunderstorms produced flash flooding andlocally heavy rainfall in excess of 3 inches.ILZ027>031-036>038-041-043>046Champaign - De Witt - Fulton - Knox - Marshall - Mason - Mclean - Peoria - Piatt - Stark - Tazewell -Vermilion - Woodford11131400CST 0 0 0.00K 0.00K Excessive Heat88

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, CentralA large upper-level ridge of high pressure over the southern U.S. produced an extended period of hot and humid weather acrosscentral Illinois from August 9th through August 14th. With actual air temperatures well into the 90s and dewpoints in the upper70s...heat index values soared above 105 degrees....with readings occasionally in excess of 110 degrees along and south of aShelbyville to Paris line.Peoria CountyDunlap 13 1655CST1700CST 0 0 4.00K 0.00K Thunderstorm Wind (52EG)Two large tents at a festival were destroyed by strong winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Peoria County2 NNW Bartonville 13 1700CST1705CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A large tree limb was blown down on Kimmoor Road in Limestone Township.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Logan County1 NE Lincoln 13 1755CST1800CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Powerlines were blown down near Lincoln College.A large complex of thunderstorms developed over Iowa during the afternoon of August 13th, then tracked east-southeast intowest central Illinois by early evening. The storms produced 50 to 60 mph winds as they pushed eastward, eventuallyweakening along the I-55 corridor. Scattered reports of wind damage were received, particularly across the Illinois RiverValley. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Morgan CountyJacksonville 20 1710CST1715CST 0 0 45.00K 0.00K Thunderstorm Wind (52EG)Numerous tree limbs were blown down across Jacksonville. A tree was snapped at the trunk and fell onto Hoagland Boulevard.A large window at a bridal shop was broken and several homes lost shingles from their roofs.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sangamon CountySpringfield 20 2100CST2359CST 0 0 0.00K 0.00K Heavy RainA woman drowned in downtown Springfield near the intersection of 3rd and Capitol after her car stalled in an underpass whichwas flooded due to a storm sewer backup. As she was trying to push her car out of about three feet of standing water, sheslipped partially into a manhole cover and was submerged. The area had received 1.52 of rain, with 1.41 falling during the twohours prior to the drowning. Minor flooding of typically flood-prone areas was reported elsehwere around Springfield.An upper-level disturbance pushed into west-central Illinois during the afternoon of August 20th, triggering widespreadshowers and thunderstorms. Due to a very moist airmass and relatively slow storm motion, locally heavy rainfall of between 1and 3 inches occurred. Minor flooding was reported in many typically flood-prone locations. One fatality occurred inSpringfield when a woman fell partially into a manhole as she was attempting to push her car out of a flooded viaduct. Severalof the thunderstorms produced gusty winds, with one cell downing numerous tree branches in Morgan County.ILLINOIS, NortheastCook CountyMc Cook 03 0403CST0800CST 0 0 0.00K 0.00K Flash FloodThree to four feet of water was reported under a viaduct near Archer Avenue and 63rd Street.89

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, NortheastKane County1 ESE Scraper Moecherville1 NE Marywood03 0430CST1000CST 0 0 100.00K 0.00K Flash FloodFlooding of low lying areas and some streets was reported across southern Kane County. Signficant flooding occurred in theOgden Gardens neighborhood on Aurora's East side, on Parkside Avenue north of East New York Street. Sandbags wereplaced around at least one house and several houses suffered basement flooding. Storm total rainfall of 2.98 inches wasmeasured in Aurora.Will County3 W Birds2 N Wolfs03 0430CST1000CST 0 0 1.00M 0.00K Flash FloodSignificant and widespread flooding occurred across north central Will County during the morning hours of August 3rd.Numerous roads were flooded and closed. Route 53 at Murphy had 6 to 8 inches of rapidly moving flood water; several carswere stuck in flood waters at Theodore and Larkin, which was impassible; five cars were stalled in flood waters on Route 53north of Romeo Road; Route 30 was flooded and closed between Cherry Hill and Briggs Street; Interstate 80 was flooded andclosed in both directions at Briggs Street and Cherry Hill; Route 53 near Lewis Unversity was flooded and closed; numerousstreets in Crest Hill were flooded, including Larkin Avenue, Route 53, Gaylord and Theodore; and the Route 53 Alcanoverpass. Flooding was also reported on Hammes, Oneida and Madison Streets near St. Joesph Hospital in Joliet. The DupageRiver flooded parts of Caton Farm and Lily Cache Roads. Numerous basements were also flooded. Storm total rainfallamounts included 4.44 inches in Joliet; 3.92 inches near Larkin and Theodore in Joliet; 3.09 inches in Crest Hill; 2.78 inchestwo miles southeast of New Lenox and 2.78 inches at the National Weather Service office in Romeoville.Will County4 NNE Wilton1 NE Marley03 0430CST1000CST 0 0 0.00K 0.00K Flash FloodStreet flooding was reported across parts of northeast Will County during the morning hours of August 3rd. Storm total rainfallamounts included 3.54 inches five miles east northeast of Manhattan and 2.92 inches three miles east of Crete.Cook County2 NW Lemont3 ENE Burnham03 0445CST1000CST 0 0 500.00K 0.00K Flash FloodSeveral roads were closed due to flooding across southern Cook County. In Chicago Heights, 202nd Street was flooded andclosed from Wood Street to Ashland Avenue. Tinley Park reported 19 locations with high standing water in the streets. InMidlothian, a church suffered flooding on the first floor; several streets were flooded and standing water in some areas wasestimated to be 4 feet deep. Basement flooding was also reported in some areas. Storm total rainfall amounts included 4.10inches in Oak Forest, 2.50 inches four miles southeast of Matteson and 1.44 inches five miles east southeast of ChicagoHeights.Kendall County4 E Montgomery7 E White Willow03 0530CST1000CST 0 0 0.00K 0.00K Flash FloodSeveral roads were flooded across parts of Kendall County including Route 52 and Grove Road; County Line Road at CatonFarm Road; Ridge Road and Caton Farm Road; on Morgan Drive in Oswego; and at Schlapp and Cherry Roads. Storm totalrainfall amounts included 3.39 inches one mile southwest of Oswego and 3.04 inches in Yorkville.Heavy rain fell across parts of northern Illinois during the morning hours of August 3rd producing flash flooding.Ogle CountyPolo 04 0414CST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A four inch diameter tree was snapped at its base. Power lines were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.La Salle County1 SSE Ottawa 04 0444CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A large tree was blown down near Marcy and Guthrie Streets.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.90

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, NortheastWill County2 WNW Channahon 04 0510CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Kane County2 N Elburn 04 0513CST 0 0 0.00K 0.00K Thunderstorm Wind (58MG)A wind gust to 67 mph was measured near Route 38 and Route 47.Note: The measured wind gust of 58 knots is equivalent to 67 mph.Kane County1 E Valley View 04 0520CST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)An 8 inch diameter tree was blown down blocking the southbound lanes of Route 25.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Du Page CountyNaperville 04 0528CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Du Page CountyCarol Stream 04 0540CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Du Page County1 S Westmont 04 0552CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cook County5 SSE Deerfield 04 0555CST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Ogle County3 SE Hazelhurst2 W Buffalo Grove04 0632CST0900CST 0 0 0.00K 0.00K Flash FloodBuffalo Creek overflowed its banks near Milledgevill and South Freeport Roads.Strong to severe thunderstorms moved across parts of northern Illinois during the morning hours of August 4th.Lake County1 NE North Barrington 08 0400CST 0 0 100.00K 0.00K LightningA house on Lakeside Lane was struck by lightning which started a fire in the attic. The home was devastated by the fire.Strong thunderstorms moved across parts of northern Illinois during the early morning hours of August 8th.ILZ014Cook12 1300CST2000CST 1 0 0.00K 0.00K Excessive HeatHigh temperatures reached the lower to middle 90s across much of northern Illinois. F1PH91

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, NortheastMchenry CountyLake In The Hills 13 0640CST0641CST 0 0 0.00K 0.00K Hail (0.88)Mchenry CountyLake In The Hills 13 0640CST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)Note: The measured wind gust of 55 knots is equivalent to 63 mph.Winnebago County3 WNW Wempleton 13 1507CST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)A tree was blown down near Route 70 and Winnebago Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Winnebago CountySamuelson Corners 13 1612CST1900CST 0 0 0.00K 0.00K FloodStanding water was reported on Alpine Road between Spring Creek Road and State Street. Rainfall amounts included 2.50inches near Winnebago Road and US20 in Rockford and 3.50 inches in Machesney Park.Boone County1 E Hunter 13 1612CST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)A tree was blown down near Hunter Road and Route 76, blocking both lanes.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Kane County2 WSW Hampshire 13 1833CST2100CST 0 0 0.00K 0.00K FloodStanding water and full ditches were reported along Route 72, west of Hampshire.Kane County1 W North AuroraMarywood13 1855CST2100CST 0 0 0.00K 0.00K FloodUp to four inches of standing water was reported on roads south of Interstate 88 in Aurora.Strong to severe thunderstorms moved across parts of northern Illinois during the afternoon hours of August 13th.ILLINOIS, NorthwestHenry County2 E German Corner1 NNE Bradenburg Corners10 0330CST0630CST 0 0 50.00K 0.00K Flash FloodHeavy rains resulted in flash flooding of some streets in the Kewanee, IL area during the morning of August 10.Another round of heavy rain-producing showers and thunderstorms developed and moved across eastern Iowa and northernIllinois during the morning of August 10. The heaviest rainfall amounts of 2.50 to 3.50 inches were centered aroundWashington, IA and Kewanee, Illinois, where flash flooding was observed. Low temperatures across the area were mainly inthe lower and middle 70s.Hancock County1 E Dallas City 10 1700CST 0 0 0.00K 0.00K Hail (0.88)Non-severe hail was observed in Dallas City, IL around 6 pm CDT August 10.92

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, NorthwestJo Daviess County1 N Woodbine 13 1500CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph blew down several large tree limbs in Woodbine, IL around 4 pm CDT August 13.Hancock County2 NW Hamilton3 WNW ElvastonNote: The estimated wind gust of 52 knots is equivalent to 60 mph.13 1545CST1800CST 0 0 0.00K 0.00K Flash FloodHeavy rains resulted in some flash flooding in the Hamilton, IL area during the late afternoon and evening of August 13.An area of showers and thunderstorms ahead of a cold front over central Iowa moved eastward into eastern Iowa, northernMissouri, and northern Illinois during the afternoon and evening of August 13. Damaging winds and flooding rainsaccompanied the stronger storms. High temperatures August 13 were mainly in the upper 80s to middle 90s. Heat indexreadings ranged from 100 to 110 degrees.Mcdonough County1 W Macomb 20 1215CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph blew down some branches in Macomb, IL at 115 pm CDT August 20.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Whiteside County1 S Morrison 20 1258CST 0 1 0.00K 0.00K LightningA 12 year old boy was struck by lightning at Southside Elementary School in Morrison, IL just before 2 pm CDT August 20.Whiteside County2 W Ustick 20 1305CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Whiteside CountyUnionville1 SE MorrisonWind gusts estimated to be 60 mph were observed about 2 miles west of Ustick, IL or about 6 miles north northwest ofMorrison, IL at 205 pm CDT August 20.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.20 1310CST 0 0 10.00K 0.00K Thunderstorm Wind (70EG)Wind gusts estimated to be 70 mph were observed in Morrison, IL around 210 pm CDT August 20. Several trees and brancheswere blown down in the area as well as a utility pole along Prairie Center Road. Route 30 was closed for a while due to treeremoval operations. The sources for this report were the spotter's police scanner and a newspaper.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Carroll County1 SW Chadwick 20 1322CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph were observed in Chadwick, IL at 222 pm CDT August 20.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Stephenson County1 NW Freeport 20 1355CST 0 0 50.00K 0.00K Thunderstorm Wind (56EG)Wind gusts estimated to be 65 mph blew a limb down in Freeport, IL around 255 pm CDT August 20. The limb, which was 6to 8 inches in diameter, fell onto some power lines which in turn caused a house fire. This report was relayed by WREX.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Stephenson County2 WSW Damascus 20 1358CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Wind gusts estimated to be 65 mph blew down a 10 inch diameter tree limb about 7 miles northwest of Freeport, IL around 258pm CDT August 20.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.93

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, NorthwestHancock County1 NNW Warsaw 20 1620CST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)Wind gusts estimated to be 65 mph blew down some large tree limbs and power lines in Warsaw, IL around 520 pm CDTAugust 20.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hancock County1 ESE Hamilton 20 1640CST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)Wind gusts estimated to be 65 mph blew down some large tree limbs and power lines in Hamilton, IL around 540 pm CDTAugust 20.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hancock CountyAugusta 20 1650CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph were observed in Augusta, IL around 550 pm CDT August 20. Some small tree limbs wereblown down. The observer made the report the morning of August 21.Showers and thunderstorms moved across the area August 20 as a trough of low pressure moved into western Iowa. Some ofthe storms were severe downing trees and power lines. Torrential downpours also accompanied the storms with rainfall totals of1 to 2 inches in just an hour or two. Otherwise, warm and humid conditions prevailed across the region with high temperaturestopping out in the middle 80s to lower 90s. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.ILLINOIS, SouthAlexander CountyThebes1 WSW Thebes Jct01050000CST1700CST 0 0 0.00K 1.00K FloodMinor flooding of the Mississippi River persisted from July into early August. Some fields in low-lying bottomlands weresubmerged.Persistent wet weather across the Upper Mississippi Valley sent several small crests down the river, keeping the river aboveflood stage at Thebes.ILZ090>094Alexander - Hardin - Massac - Pope - Pulaski03310000CST2359CST 0 0 0.00K DroughtModerate drought conditions developed over extreme southern Illinois, along the Ohio River. Rainfall for the months of June,July and August was variable, consisting of isolated to widely scattered showers and thunderstorms. Many locations were oneto over three inches below normal for the month of August. Hot conditions increased evaporation rates and crop stress. Afarmer in Pulaski County stated that drought had led to problems with the quality of the corn grown in his area. The ears weresmaller and not filled out to the tip, and the test weight was lower than usual. Aflatoxin, produced by mold fungi duringdrought, led to some farmers' corn being rejected at the elevator. An upper level ridge of high pressure remained firmlyentrenched over the southern states during most of the month.ILZ075>078-080>094Alexander - Edwards - Franklin - Gallatin - Hamilton - Hardin - Jackson - Jefferson - Johnson - Massac -Perry - Pope - Pulaski - Saline - Union - Wabash - Wayne - White - Williamson03041000CST2000CST 0 2 0.00K 0.00K Excessive HeatExcessively high heat indices were recorded in the late morning and afternoon hours of both the 3rd and 4th. On the 3rd, theheat index peaked at 118 degrees at the Carbondale airport. Similar values were measured elsewhere in southern Illinois. Heatindices only fell into the mid 80's at sunrise. On the 4th, the heat index peaked at 112 at Carbondale. The actual air temperaturereached 104 degrees at Carbondale. In the Shawnee National Forest, two hikers were overtaken by the heat. The dehydratedhikers were taken by ambulance to a local hospital, where they were treated and released. A large, strong high in the upperlevels of the atmosphere overspread the southern half of the nation.09151000CST2000CST 0 7 0.00K 0.00K Excessive Heat94

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, SouthILZ076>078-080>094Alexander - Edwards - Franklin - Gallatin - Hamilton - Hardin - Jackson - Johnson - Massac - Perry -Pope - Pulaski - Saline - Union - Wabash - Wayne - White - Williamson09151000CST2000CST 0 3 0.00K 0.00K Excessive HeatA strong and very persistent high in the upper levels of the atmosphere was responsible for seven consecutive days of heatindices at or above 105 degrees. The high was centered over the Lower Ohio Valley for the first few days of the heat wave,then it shifted slightly southward and weakened. The summer as a whole was among the hottest on record. The heat indexpeaked mainly between 105 and 111 degrees at the Marion and Carbondale airport sites during each afternoon of the event.Similar values were observed elsewhere. Heat indices during the early morning hours were mostly in the mid to upper 80's.Hospitals reported that cases of heat exhaustion were quite low. Seven heat-related illnesses were treated at a Mount Vernonhospital. Only a few cases were reported in the Harrisburg area. Heat illness information was not available from other hospitals.Jefferson CountyOpdyke 12 0955CST 0 0 40.00K 0.00K Thunderstorm Wind (61EG)Siding was pulled off homes and a boat was thrown into a woodpile. Trees were blown over, including a large oak tree. Vinylfencing was blown across a yard. Tree limbs were down on roads.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Hamilton CountyDahlgren 12 1025CST 0 0 80.00K 0.00K Thunderstorm Wind (52EG)Numerous large tree limbs four inches or more in diameter were blown down throughout the village. Several large mature treeswere down. Utility crews estimated twenty trees were down. One garage was slightly damaged by a falling tree. IllinoisHighway 142 was blocked for a short time due to a fallen tree.Franklin CountySesserEwingPerry CountyDu Quoin1 N ClinchFranklin CountyMulkeytownBentonNote: The estimated wind gust of 52 knots is equivalent to 60 mph.12 1112CST1120CST 0 0 50.00K 0.00K Thunderstorm Wind (52EG)Trees and power lines were down at both Sesser and Ewing.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.12 1120CST1125CST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)A construction trailer was overturned at the Du Quoin State Fairgrounds. A large tree limb was blown down across a house inDu Quoin.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.12 1128CST1140CST 0 0 40.00K 0.00K Thunderstorm Wind (61EG)Trees were blown down in Mulkeytown. In Benton, a large tree fell on an apartment building. Moderate damage occurred to theroof and upper parts of a wall. A very large tree was blown down in Christopher.White County1 NW Carmi3 E Norris CityNote: The estimated wind gust of 61 knots is equivalent to 70 mph.12 1135CST 0 0 20.00K 0.00K Thunderstorm Wind (52EG)Utility crews repaired power lines damaged by falling tree limbs. Numerous tree limbs were blown down on the northwest sideof Carmi. A few miles east of Norris City, three large trees were blown down in a front yard. Two of the trees were pine trees,and the other was a maple. All three trees were over 40 feet tall. A trampoline was blown over across the street.Pockets of wind damage were produced by thunderstorms that formed in a hot and very unstable air mass. The atmosphere wascharacterized by a weak flow regime resulting from persistent ridging in the mid and upper levels. Note: The estimated windgust of 52 knots is equivalent to 60 mph.95

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ILLINOIS, SouthFranklin CountyChristopher 15 0130CST 0 0 25.00K 0.00K Thunderstorm Wind (52EG)Large trees were blown down. Some tree limbs landed on power lines and roads. A portion of a fence was blown out.Clusters of strong thunderstorms moved southeast across southern Illinois. A cluster briefly evolved into a bowing line ofstorms that produced isolated damaging winds. The storms occurred ahead of a cold front as it moved east across easternMissouri and into western Illinois. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.ILLINOIS, SouthwestMonroe County1 NE KiddRenault05 0440CST0442CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds blew over a power pole about a mile northeast of Kidd. In Renault, several large tree limbs were blowndown.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Randolph CountyPrairie Du Rocher 05 0442CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew down several large trees, tree limbs and power lines around town. One tree fell onto an unoccupiedvehicle causing major damage.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Randolph County1 W Ruma 05 0450CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew down numerous large trees in St. Patrick's Cemetery and in town. Also, numerous large tree limbsand power lines were blown down around town. Several tombstones were damaged in the cemetery and a large shed wasdestroyed just south of Ruma.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Randolph County1 NNW Evansville 05 0453CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Several large trees were blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Randolph County3 NNW Sparta Hunter Fld ArSparta05 0520CST 0 1 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew down numerous large trees, tree limbs and power lines around town. Just northwest of town at arecreational complex, a fifth wheel RV was blown over. A man was inside at the time sleeping. He sustained a broken arm andother minor injuries. In Sparta, one large tree limb damaged a carport and a nearby unoccupied car.A strong cold front moved through the region triggering showers and thunderstorms. A few of the storms produced damagingwinds. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Adams County3 SSW Kellerville 10 1930CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)INDIANA, CentralThunderstorm winds blew down or uprooted numerous large trees in Siloam Springs State Park.Isolated storms developed along an outflow boundary that was moving south through the forecast area. A few of the stormsproduced damaging winds. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Howard County1 W Greentown 03 2340EST 0 0 9.50K Thunderstorm Wind (61EG)Two trees, one blocking the road, were reported down due to damaging thunderstorm wind gusts. Roofing was also blown off abarn.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.96

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010INDIANA, CentralCarroll County3 ENE Bringhurst 04 0030EST 0 0 5.00K Thunderstorm Wind (61EG)Trees and power lines were reported down due to damaging thunderstorm wind gusts. Some of these trees were approximatelyfive feet in diameter.Scattered thunderstorms developed across northern portions of Central Indiana during the early morning hours of August 4th. Afrontal boundary was positioned from west to east across the state. Couple that with CAPE values ranging from 2000 to 4000J/kg and as these storms pushed eastward across the area, a couple of thunderstorm wind reports were received in our forecastarea. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Delaware County3 NNW Eaton 04 1034EST 0 0 1.00K Thunderstorm Wind (50EG)A tree was reported downed, due to damaging thunderstorm wind gusts, near State Road 3 and County Road 1200 N.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Delaware County1 S Selma 04 1053EST 0 0 0.25K Thunderstorm Wind (52EG)Numerous limbs were reported down, due to damaging thunderstorm wind gusts, in Selma.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Randolph County1 NNW Parker City 04 1100EST 0 0 0.25K Thunderstorm Wind (52EG)Numerous limbs were reported down, due to damaging thunderstorm wind gusts, in Parker City.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Randolph County1 NNW Parker City 04 1102EST 0 0 Hail (0.88)Nickel sized hail was observed at the intersection of 3rd Street and Oak Street.Randolph County3 E Unionport 04 1120EST 0 0 30.00K 0.30K Thunderstorm Wind (65EG)Several hog barn and compost building roofs were partially blown off, due to damaging thunderstorm wind gusts, at CountyRoad 400 S and 3725 W. Also, some sorghum plants were flattened near County Road 500 W and 5072 S.A line of thunderstorms pushed across northern Illinois and northern Indiana during the morning hours of August the 4th. Bylate morning, this line of storms had developed further south into northern portions of Central Indiana. A singular report of hailand a few reports of damaging wind gusts, including one causing significant damage to some hog barns in Randolph County.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Tippecanoe County1 NNW Romney 04 1815EST 0 0 1.00K Thunderstorm Wind (56EG)A downed tree was observed blocking the road at the intersection of Highway 28 and US Highway 231 due to damagingthunderstorm wind gusts. The time this event occurred was estimated from radar.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Boone County2 W Gadsden 04 1838EST 0 0 1.00K Thunderstorm Wind (56EG)A large tree was reported down, due to damaging thunderstorm wind gusts, across the road near the intersection of CountyRoads 400 E and 100 N.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Clinton County1 SE Kirklin 04 1842EST 0 0 1.00K Thunderstorm Wind (56EG)A two foot diameter tree was reported down due to damaging thunderstorm wind gusts.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.97

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010INDIANA, CentralHamilton CountyCicero 04 1905EST 0 0 13.00K Thunderstorm Wind (63MG)Several lagre trees were reportedly snapped off five feet above the ground due to damaging thunderstorm wind gusts. Severallight poles were also reportedly snapped off in the same location.Note: The measured wind gust of 63 knots is equivalent to 72 mph.Randolph County1 ENE Winchester 04 1950EST 0 0 9.00K Thunderstorm Wind (61EG)Trees were downed on power lines and billboard signs were damaged, due to damaging thunderstorm wind gusts, along USHighway 27 in Winchester.Scattered thunderstorms developed across East-Central Indiana on the early evening of August 4th. These storms formed alonga boundary stretched east to west across the forecast area and was reinforced by convection earlier in the day. As these stormsprogressed across Central Indiana, multiple thunderstorm wind damage reports were received. Note: The estimated wind gustof 61 knots is equivalent to 70 mph.Delaware County1 E West Muncie 11 0535EST0610EST 0 0 Heavy RainOne inch of rain fell in 30 minutes in this location. Pea to marble size hail also fell.Delaware County2 NE Mayfield 11 0610EST 0 0 120.00K LightningA split-level home was reportedly struck by lightning on East Gilbert Street in Muncie. Lightning struck near the bedroomwindow and the house started smoking. According to the Muncie fire department, the house was pretty well destroyed.Carroll County2 NW Burrows 11 0800EST 0 0 5.00K Thunderstorm Wind (56EG)Several trees were reported down in this location due to damaging thunderstorm wind gusts.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hancock CountyFortville 11 1050EST 0 0 5.00K Thunderstorm Wind (56EG)Trees were reported down in this location due to damaging thunderstorm wind gusts.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Rush County7 NW Rushville 11 1145EST 0 0 5.00K Thunderstorm Wind (56EG)Several large trees were reported down due to damaging thunderstorm wind gusts.Scattered thunderstorms developed across the northern half of Indiana, as well as over portions of East-Central Illinois duringthe morning hours of August the 11th. As these storms pushed eastward, multiple damaging wind reports were received as wellas a report of a house being struck by lightning in Muncie and destroyed. Note: The estimated wind gust of 56 knots isequivalent to 64 mph.Knox County1 W Vincennes 12 1539EST1541EST 0 0 Funnel CloudThere were multiple reports of a funnel cloud by law enforcement and trained weather spotters.Knox County1 SE Vincennes 12 1545EST 0 0 1.00K 0.00K LightningThe Vincennes Sun Commercial reported a 30 year old cedar tree being struck by lightning on Franklin Street on the east sideof Vincennes.98

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010INDIANA, CentralScattered thunderstorms developed across southern portions of Central Indiana during the afternoon of August 12th. Reports ofa funnel cloud near Vincennes came in from multiple sources as a storm passed overhead. Also, a tree was struck by lightningover on the east side of Vincennes.Marion County2 NE Lawrence 13 1920EST2145EST 0 0 0.50K 0.00K FloodHigh water was reported on roadways in and around the city of Lawrence due to thunderstorm heavy rainfall.An isolated thunderstorm developed over Central Indiana during the late afternoon on August the 13th. This storm producedheavy rainfall over the northeast quarter of Marion County, where some localized flooding occurred.INDIANA, NortheastStarke County1 WSW Toto 04 0709CST0710CST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Law enforcement officials reported a large tree down across County Road 400 South, between Range Road and State Route 39.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Miami CountyDenver 04 0906EST0907EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A trained spotter reported winds of 55 to 60 mph as well as some pea size hail.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Wabash County1 N Lagro 04 0925EST0926EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Law enforcement officials reported numerous trees down in the town of Lagro.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Blackford CountyHartford City 04 1028EST1029EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Law enforcement officials reported numerous trees were blown down.A complex of strong to locally severe thunderstorms moved across Northern Indiana producing wind damage in somelocations. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Cass County1 W Galveston 04 1750EST1751EST 0 0 0.00K 0.00K Thunderstorm Wind (60EG)A trained spotter reported both a 100 foot and 60 foot tree were snapped at around the 20 foot level. Each tree ranged from 20to 24 inches in diameter.An outflow boundary from morning convection and a upper level wave resulted in widespread convection across much ofcentral Indiana. A few of these storms moved from Cass into Blackford counties, but damage was isolated. Note: Theestimated wind gust of 60 knots is equivalent to 69 mph.Blackford County3 SSW Montpelier 11 0720EST 0 0 50.00K 0.00K LightningThe local newspaper reported lightning was the cause of a barn fire in the 4200 block of East 400 North. The barn was fullyengulfed in flames when fire fighters arrived. The building suffered extensive damage, estimated at around $50,000. No detailson contents or their extent of damage was provided.99

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010INDIANA, NortheastCass County5 NW Lake Cicott 11 0743EST0744EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Emergency management officials reported a few trees down onto power lines on County Road 400 North, near the Cass andWhite county lines.A weak upper level system and moderate instability allowed for thunderstorms to develop. A lack of overall shear resulted inthe storms producing isolated wind damage as cells collapsed or cold pools established. Note: The estimated wind gust of 55knots is equivalent to 63 mph.Whitley County3 NW Churubusco 15 1233EST1234EST 0 0 0.00K 0.00K Thunderstorm Wind (60EG)Law enforcement officials reported multiple trees down as well as some corn flattened on County Road 700 North, betweenCounty Roads 650 and 750 East.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Noble County2 E Green Center 15 1235EST1236EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)A trained spotter reported trees and power lines down in the southeastern portion of the county. A small area of corn, as well asa metal shed were damaged.A cold front and upper level system, combined with a moist and unstable atmosphere, to produce widely scatteredthunderstorms across northeastern Indiana. A few damaging wind gusts occurred but the main organization of the stormsoccurred as they left into portions of Ohio. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.INZ003La Porte22 1514CST1515CST 4 4 0.00K 0.00K Rip CurrentA north to northwest wind moved in behind a cold front on August 21st. High pressure moved towards the western GreatLakes. This allowed for an extended period of higher winds and waves on far southeastern Lake Michigan with wave heights inthe three to six foot range. This caused a high risk of rip currents. Eyewitnesses reported a rip current developed near aMichigan City pier. At least four swimmers were affected by this, with two males losing their lives. M14IW, M17IWINDIANA, NorthwestLake County2 NW Whiting1 N (GYY)Gary Muni Arpt03 0530CST1000CST 0 0 0.00K 0.00K Flash FloodHeavy rain created street flooding in many areas across north central Lake County including Ruth Street at 77th Street inSchererville; 122nd Avenue in Crown Point and the intersection of 106th Avenue and Baker in Crown Point. Bell Road and87th Avenue was also flooded in St. John. Storm total rainfall amounts included 3.52 inches three miles west southwest ofCrown Point; 2.76 inches two miles east northeast of St. John; 2.04 inches one mile west southwest of Dyer and 1.91 inchesabout a mile and half east southeast of Merrillville.Heavy rain fell across parts of northwest Indiana during the morning hours of August 3rd producing flash flooding.Lake County2 SW Triangle Arpt1 WNW New Elliott04 0637CST0900CST 0 0 0.00K 0.00K FloodFour inches of water was reported covering roads southwest of Schererville.Porter County1 SE Portage 04 0648CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated to 60 mph. Lawn chairs and patio furniture were overturned.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.100

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010INDIANA, NorthwestPorter County1 W Valparaiso 04 0700CST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)INDIANA, South CentralA one foot diameter tree was blown down near Joliet Road and Route 130.Strong to severe thunderstorms moved across parts of northwest Indiana during the morning hours of August 4th. Note: Theestimated wind gust of 55 knots is equivalent to 63 mph.Jefferson County1 N Deputy 04 2252EST 0 0 Thunderstorm Wind (52EG)Jefferson county dispatch reported a tree down just north of Deputy.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 ESE North Madison 04 2306EST 0 0 Thunderstorm Wind (50EG)Jefferson county dispatch reported a tree fell across a roadway in Madison.An extremely hot air mass across the Ohio Valley was in place on August 4 with excessive heat warnings issued for portions ofsouthern Indiana. By the afternoon convective temperatures were reached and scattered strong storms developed. A couple ofthese storms became strong enough to produce damaging wind gusts. Note: The estimated wind gust of 50 knots is equivalentto 58 mph.Crawford County1 E Marengo 14 1445EST 0 0 Thunderstorm Wind (52EG)Two trees were blown down in the Marengo area.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Scott County2 WSW Lexington 14 1520EST 0 0 Thunderstorm Wind (52EG)Several trees were blown down on Kinderhook Rd. The time was estimated based on radar.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Scott County3 SW Blocher 14 1520EST 0 0 Thunderstorm Wind (52EG)Several trees were blown down near the intersection of State Rd. 56 and State Rd. 3. The time was estimated based on radar.The trailing edge of an Mesoscale Convective Complex across Indiana and Illinois interacted with a moist very unstableenvironment over southern Indiana and central Kentucky. Isolated showers and thunderstorms developed into a broken line thatslowly moved across the region. Slow moving storms produced torrential rainfall and led to some isolated flash flooding. Wetmicrobursts also produced wind damage scattered across the region. Note: The estimated wind gust of 52 knots is equivalent to60 mph.Clark County2 SE Memphis 15 1915EST 0 0 Thunderstorm Wind (52EG)INDIANA, SoutheastA downed tree was blocking Memphis Charlestown Rd.A shortwave moving combined with the hot moist air across the region led to afternoon thunderstorms across southern Indiana.One of these storms became strong enough to produce isolated damaging wind gusts. Note: The estimated wind gust of 52knots is equivalent to 60 mph.Franklin CountyBrookville 04 1331EST1334EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and power poles were reported down due to damaging thunderstorm winds.A very unstable air mass was in place with temperatures in the 90s and dew points in the upper 70s. While forcing was weak,there was enough lift ahead of a mid-level impulse to spark widespread convection in the form of a mesoscale convectivesystem. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.101

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010INDIANA, SoutheastWayne CountyHagerstown5 W Richmond04 2025EST2030EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Large trees and power lines were reported down throughout the county.A second mesoscale convective system moved through the area during the evening hours. Note: The estimated wind gust of 50knots is equivalent to 58 mph.Fayette CountyAlpine 11 1243EST1247EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)INDIANA, SouthwestLarge limbs were reported down due to damaging thunderstorm winds.A few severe storms developed and moved across the area on the 11th of August. The main threat from these storms wasdamaging wind. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.INZ081-085>088Gibson - Pike - Posey - Spencer - Vanderburgh - Warrick03041200CST2000CST 0 10 0.00K 0.00K Excessive HeatExcessively high heat indices were recorded in the late morning and afternoon hours of both the 3rd and 4th. On the 3rd, theheat index peaked near 115 degrees at the Evansville airport. Similar values were measured elsewhere in southwest Indiana.Heat indices only fell into the mid 80's at sunrise. On the 4th, heat indices peaked at 110 at Evansville. Actual air temperaturesreached 102 degrees at Evansville on the 4th. Ten persons were treated for heat-related illnesses at an Evansville hospital. Theheat was blamed for the deaths of two dogs at two separate residences in Evansville. Police found both dogs outdoors with nowater. A large, strong high in the upper levels of the atmosphere overspread the southern half of the nation.09151000CST2000CST 0 0 0.00K 0.00K Excessive HeatINZ082-085>088Pike - Posey - Spencer - Vanderburgh - Warrick09151000CST2000CST 0 0 0.00K 0.00K Excessive HeatA strong and very persistent high in the upper levels of the atmosphere was responsible for seven consecutive days of heatindices at or above 105 degrees. The high was centered over the Lower Ohio Valley for the first few days of the heat wave,then it shifted slightly southward and weakened. The summer as a whole was among the hottest on record. The heat indexpeaked between 105 and 110 degrees at the Evansville airport during each afternoon of the event. Similar values were observedelsewhere. Heat indices during the early morning hours were mostly in the mid to upper 80's.Vanderburgh CountyEvansville 12 1259CST 0 0 0.00K 0.00K Dust DevilA very well-defined dust devil was observed. The dust devil was roughly ten feet wide at the base and about 60 feet tall. Ittravelled around 80 feet before dissipating.A dust devil occurred during a very hot and unstable afternoon with light winds.IOWA, CentralBoone County10 N Ridgeport10 N Pilot Mound01 0000CST0722CST 0 0 0.00K 0.00K FloodMahaska County8 S Cedar4 SSE Givin01310000CST2359CST 0 0 1.00M 500.00K Flood102

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralWapello County3 S Eddyville6 SW Cedar01310000CST2359CST 0 0 2.00M 500.00K FloodPolk County2 ESE Des Moines 01060645CST2130CST 0 0 100.00K 25.00K FloodFlooding continued along a large part of the Des Moines River Basin from the previous month. The flooding ended in theStratford area by the afternoon of the 1st, however releases from Saylorville and Red Rock Reservoirs maintained river stagesabove flood stage through the first week of the month in the Des Moines area, and through the month in the Eddyville andOttumwa areas.Poweshiek CountySearsboro 03 0330CST1100CST 0 0 25.00K 0.00K FloodAdair County1 S Fontanelle 03 2212CST 0 0 1.00K 0.00K Thunderstorm Wind (54MG)Note: The measured wind gust of 54 knots is equivalent to 62 mph.Adair County1 NE Greenfield 03 2213CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)A few trees were blown down around town as well as large branches broken.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Adair County2 S Arbor Hill 03 2230CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Trained spotter reported 5 to 6 inch diameter tree limbs down and doors of an outbuilding blown in.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Madison County1 SE Earlham 03 2240CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)A trained spotter reported 1 foot diameter limbs down on the south side of Earlham.Warren County2 NNW Churchville2 WSW NorwalkA quasi-stationary front extended from central Kansas into northern Illinois. The airmass was very unstable with hightemperatures reaching the low to mid 90s over southern Iowa, with dew point readings in the mid to upper 70s. By evening,CAPE was in the 3000-5000 J/kg range with lifted indices falling to -6 to -8. The downdraft CAPE available was between 900and 1400 J/kg, with 600-700 J/kg in the -10 to -30 C layer of the atmosphere. Precipitable water values were around 2 to 2.3inches. The freezing level was quite high at 15,600 feet. The temperature at 700 mb was +15 C over southern Iowa. Therewas decent shear available with 40 to 45 kts of effective shear. Thunderstorms fired in eastern Nebraska and western Iowa.The storms produced spotty high winds, however most of the wind gusts were below severe limits, in the 30 to 45 MPH range.A wind gust was measured in Adair County at 62 MPH. Large tree limbs were downed by high winds on the south side ofEarlham in Madison County. Wind damage also occurred in the Greenfield Area. Heavy rainfall resulted in rising water alongHighway 146 near Searsboro. The road was blockaded for several hours until the water receded. Note: The estimated windgust of 52 knots is equivalent to 60 mph.04060116CST1857CST 0 0 10.00K 5.00K FloodStrong thunderstorms formed over central Iowa during the morning hours of the 4th. The ground was already quite saturated,resulting in rapid runoff of the heavy rainfall. Rainfall for the most part ranged from 1 to 3 inches in a short period of time.This resulted in flash flooding in parts of central Iowa. As the water ran off, rises in mainstem river systems took place incentral toward southeast Iowa. The river flooding itself was relatively minor and short lived.Polk County2 ESE Lovington 04 0602CST0930CST 0 0 25.00K 0.00K Flash FloodTrained spotter reported several stalled vehicles at the intersection of Beaver Drive and Valdez Drive.103

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralA very moist airmass remained in place over Iowa. Precipitable water values were near 2.25 inches when a wave of lowpressure moved northeast along a stalled front to the south of the state. Thunderstorms enhanced with a narrow line of intensestorms setting up across parts of Dallas County into Polk County. Thunderstorm development was quite rapid and formed onthe north edge of a decaying MCS to the southwest. Additional heavy storms developed and produced heavy rainfall overStory County. Rainfall of 1 to 2.5 inches in under an hour produced flash flooding. The flooding took place during rush hourin the Des Moines metropolitan area. Numerous cars were stalled with many intersections under water. Rescue missions wereconducted in a few locations to get people out of the fast flowing water. Significant damage occurred near the intersection ofInterstate 80 and Merle Hay Road. Flooding overtook part of the first floor of a hotel there. On top of the heavy rainfall, waterwas not able to flow out of the area due to a collapsed storm sewer. Flowing water was reported 1 to 2 feet in severallocations across the north side of Des Moines. Manhole covers were blown off by rapidly rising water in Dallas County atAdel. The storms produced 6 to 12 inches of flowing water in parts of Story County as well.Polk County2 N (DSM)Des Moines Intl2 E Commerce04060610CST0425CST 0 0 25.00K 10.00K FloodStrong thunderstorms formed over central Iowa during the morning hours of the 4th. The ground was already quite saturated,resulting in rapid runoff of the heavy rainfall. Rainfall for the most part ranged from 1 to 3 inches in a short period of time.This resulted in flash flooding in parts of central Iowa. As the water ran off, rises in mainstem river systems took place incentral toward southeast Iowa. The river flooding itself was relatively minor and short lived.Polk County1 NW Urbandale 04 0634CST0930CST 0 0 50.00K 0.00K Flash FloodSeveral vehicles stalled at the intersection of Northwest Urbandale Drive and Meredith Drive, also at Douglas Ave and AuroraAve by 1 to 1.5 feet of water flowing through the intersections.A very moist airmass remained in place over Iowa. Precipitable water values were near 2.25 inches when a wave of lowpressure moved northeast along a stalled front to the south of the state. Thunderstorms enhanced with a narrow line of intensestorms setting up across parts of Dallas County into Polk County. Thunderstorm development was quite rapid and formed onthe north edge of a decaying MCS to the southwest. Additional heavy storms developed and produced heavy rainfall overStory County. Rainfall of 1 to 2.5 inches in under an hour produced flash flooding. The flooding took place during rush hourin the Des Moines metropolitan area. Numerous cars were stalled with many intersections under water. Rescue missions wereconducted in a few locations to get people out of the fast flowing water. Significant damage occurred near the intersection ofInterstate 80 and Merle Hay Road. Flooding overtook part of the first floor of a hotel there. On top of the heavy rainfall, waterwas not able to flow out of the area due to a collapsed storm sewer. Flowing water was reported 1 to 2 feet in severallocations across the north side of Des Moines. Manhole covers were blown off by rapidly rising water in Dallas County atAdel. The storms produced 6 to 12 inches of flowing water in parts of Story County as well.Dallas County2 WSW Dawson21 WSW Pleasant Hill04050635CST2106CST 0 0 10.00K 5.00K FloodStrong thunderstorms formed over central Iowa during the morning hours of the 4th. The ground was already quite saturated,resulting in rapid runoff of the heavy rainfall. Rainfall for the most part ranged from 1 to 3 inches in a short period of time.This resulted in flash flooding in parts of central Iowa. As the water ran off, rises in mainstem river systems took place incentral toward southeast Iowa. The river flooding itself was relatively minor and short lived.Polk County1 NW Urbandale 04 0646CST0930CST 0 0 50.00K 0.00K Flash FloodEmergency manager reported tire-deep water flowing down the road at the intersection of 86th and I-80. Power loss andseveral vehicles stalled.Dallas County1 SW Adel 04 0659CST1145CST 0 0 50.00K 0.00K Flash FloodManhole covers blown off and cars stalled in several intersections.104

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralPolk County1 S Lovington 04 0700CST0930CST 0 0 1.00M 0.00K Flash FloodMerle Hay flooded round 0800 with about 2 feet of water over the road.A very moist airmass remained in place over Iowa. Precipitable water values were near 2.25 inches when a wave of lowpressure moved northeast along a stalled front to the south of the state. Thunderstorms enhanced with a narrow line of intensestorms setting up across parts of Dallas County into Polk County. Thunderstorm development was quite rapid and formed onthe north edge of a decaying MCS to the southwest. Additional heavy storms developed and produced heavy rainfall overStory County. Rainfall of 1 to 2.5 inches in under an hour produced flash flooding. The flooding took place during rush hourin the Des Moines metropolitan area. Numerous cars were stalled with many intersections under water. Rescue missions wereconducted in a few locations to get people out of the fast flowing water. Significant damage occurred near the intersection ofInterstate 80 and Merle Hay Road. Flooding overtook part of the first floor of a hotel there. On top of the heavy rainfall, waterwas not able to flow out of the area due to a collapsed storm sewer. Flowing water was reported 1 to 2 feet in severallocations across the north side of Des Moines. Manhole covers were blown off by rapidly rising water in Dallas County atAdel. The storms produced 6 to 12 inches of flowing water in parts of Story County as well.Polk County2 N (DSM)Des Moines Intl2 E West Des Moines04060725CST0122CST 0 0 100.00K 5.00K FloodStrong thunderstorms formed over central Iowa during the morning hours of the 4th. The ground was already quite saturated,resulting in rapid runoff of the heavy rainfall. Rainfall for the most part ranged from 1 to 3 inches in a short period of time.This resulted in flash flooding in parts of central Iowa. As the water ran off, rises in mainstem river systems took place incentral toward southeast Iowa. The river flooding itself was relatively minor and short lived.Dallas County3 WSW Dallas Mine 04 0742CST1145CST 0 0 10.00K 0.00K Flash FloodHighway F31 near Beaver Creek is closed, estimated 6-8 inches of water flowing over the road.Story County2 E Maxwell1 SW Collins04 0757CST0930CST 0 0 10.00K 0.00K Flash FloodFlash flooding reported with water over the road 1/2 mile north of Highway 210 on 670th Ave and 310th Street.Story County1 W Collins 04 0759CST0930CST 0 0 50.00K 0.00K Flash FloodEstimated 6 inches of water flowing over the road at the intersection of 4th and 2nd Ave.A very moist airmass remained in place over Iowa. Precipitable water values were near 2.25 inches when a wave of lowpressure moved northeast along a stalled front to the south of the state. Thunderstorms enhanced with a narrow line of intensestorms setting up across parts of Dallas County into Polk County. Thunderstorm development was quite rapid and formed onthe north edge of a decaying MCS to the southwest. Additional heavy storms developed and produced heavy rainfall overStory County. Rainfall of 1 to 2.5 inches in under an hour produced flash flooding. The flooding took place during rush hourin the Des Moines metropolitan area. Numerous cars were stalled with many intersections under water. Rescue missions wereconducted in a few locations to get people out of the fast flowing water. Significant damage occurred near the intersection ofInterstate 80 and Merle Hay Road. Flooding overtook part of the first floor of a hotel there. On top of the heavy rainfall, waterwas not able to flow out of the area due to a collapsed storm sewer. Flowing water was reported 1 to 2 feet in severallocations across the north side of Des Moines. Manhole covers were blown off by rapidly rising water in Dallas County atAdel. The storms produced 6 to 12 inches of flowing water in parts of Story County as well.Mahaska County4 WNW Peoria 04051800CST0122CST 0 0 0.00K 0.00K FloodStrong thunderstorms formed over central Iowa during the morning hours of the 4th. The ground was already quite saturated,resulting in rapid runoff of the heavy rainfall. Rainfall for the most part ranged from 1 to 3 inches in a short period of time.This resulted in flash flooding in parts of central Iowa. As the water ran off, rises in mainstem river systems took place incentral toward southeast Iowa. The river flooding itself was relatively minor and short lived.105

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralSac CountySchaller 08 1905CST 0 0 2.00K 0.00K Thunderstorm Wind (56EG)Small branches were down as well as other damage to power lines.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Sac CountySchaller 08 1910CST 0 0 300.00K 15.00K Thunderstorm Wind (61EG)Trees down and uprooted. Power lines down with some trees snapped.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Calhoun County2 NNE Lytton 08 1925CST 0 0 5.00K 0.00K Thunderstorm Wind (57EG)Large trees uprooted and large limbs downed by high winds.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Calhoun County4 SE Jolley 08 1937CST 0 0 5.00K 50.00K Thunderstorm Wind (62MG)Six to 10 inch tree limbs down. Crop damage reported.Note: The measured wind gust of 62 knots is equivalent to 71 mph.Calhoun CountyRockwell City 08 1941CST 0 0 3.00K 0.00K Thunderstorm Wind (54MG)Two large trees down in town.Note: The measured wind gust of 54 knots is equivalent to 62 mph.Pocahontas County1 W Fonda 08 1945CST 0 0 2.00K 0.00K Thunderstorm Wind (61EG)Off-duty Sioux Falls NWS employee reported strong winds.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Pocahontas County1 W Laurens 08 1945CST 0 0 15.00K 0.00K Thunderstorm Wind (57EG)Three foot diameter trees and large limbs were blown down.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Pocahontas County1 W Fonda 08 1945CST 0 0 25.00K 0.00K Thunderstorm Wind (61EG)Walls of brick buildings destroyed on main street and a 40,000 bushel grain bin was destroyed.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Carroll County2 E Templeton 08 1950CST 0 0 0.00K 0.00K Funnel CloudBrief funnel clouds forming and dissipating.Calhoun CountyPomeroy 08 1950CST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)Off Duty Sioux Falls NWS employee reported trees and street signs down in town.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Emmet County1 E Wellingford 08 1953CST 0 0 25.00K 0.00K Thunderstorm Wind (61EG)Fire chief reported a roof blown off in Wallingford.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.106

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralPalo Alto County1 NE Graettinger 08 1958CST 0 0 25.00K 0.00K Thunderstorm Wind (57EG)Sac County1 S Lytton 0809Local law enforcement reported streets closed due to downed trees in Graettinger.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.2000CST0444CST 0 0 25.00K 0.00K Flash FloodSac County law enforcement reports flooding over Highway 20 near Lytton.Greene County1 S Jefferson 08 2000CST2113CST 0 0 0.00K 0.00K Heavy RainRainfall since 2000 CST was 2.15 inches.Greene County1 S Jefferson 08 2000CST2303CST 0 0 0.00K 0.00K Heavy RainRainfall since 2000 CST was 3.1 inches.Carroll CountyCarroll 08 2000CST 0 0 2.00K 0.00K LightningWebster County3 NNW Roelyn 08 2013CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Trained spotter estimated a wind gust of 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Kossuth County1 NE Algona 08 2022CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Strong winds were bending trees and blowing patio furniture over.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Webster County1 NW (FOD)Ft Dodge Muni A 08 2022CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Strong winds blowing small objects and bending trees significantly.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Emmet County1 E Wellingford 08 2023CST 0 0 5.00K 0.00K Thunderstorm Wind (57EG)Wind blew the roof off of the Wallingford Community Center.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Humboldt County1 W Dakota City 08 2024CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Wright County1 W Eagle Grove 08 2041CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.107

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralBoone CountyBoone Muni Arpt 08 2058CST 0 0 5.00K 0.00K Thunderstorm Wind (54MG)Note: The measured wind gust of 54 knots is equivalent to 62 mph.Palo Alto County1 SE Emmetsburg 08 2100CST 0 0 0.00K 0.00K Heavy RainPublic reports very heavy rain in Emmetsburg with water 3-4 inches deep on Highway 18.Story County1 NNW Ames 08 2104CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)A trained spotter estimated wind speed of 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Dallas County2 SE Waukee 08 2109CST 0 0 30.00K 0.00K Thunderstorm Wind (52EG)Ten to 15 foot mature tree blown down at Centennial Park.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Carroll County1 SE Carroll 08 2115CST2354CST 0 0 100.00K 0.00K Flash FloodPolk County2 NE Commerce 0809Three to four feet of standing water on city streets.2115CST0003CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.80 inches since 2115 CDT, 1.5 inches in the 45 minutes from 2315-2400.Carroll County1 SSW Glidden 08 2120CST2354CST 0 0 50.00K 0.00K Flash FloodOne and a half feet of slowly flowing water on streets in Glidden.Franklin CountyHampton 08 2125CST 0 0 20.00K 0.00K Thunderstorm Wind (57EG)High winds from a thunderstorms downed 14 trees, many uprooted.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Greene CountyRippey 08 2132CST2354CST 0 0 50.00K 0.00K Flash FloodTrained spotter in Rippey reports fast flowing water about 6 inches deep in the streets. The city park was largely under water aswell.Marshall County1 SE Marshalltown 08 2138CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Greene CountyRippey 0809Tree branches were blown down by 60 MPH winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.2145CST0300CST 0 0 50.00K 0.00K Flash FloodWater 3 to 4 inches deep in yards, water over curbs, city park and city ball field beginning to flood.108

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralDallas County2 NNW Adel 08 2145CST 0 0 1.00M 0.00K LightningButler CountyBristow 08 2145CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)High winds blew trees down in Bristow, snapping trees.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Marshall County3 NE Marshalltown 08 2149CST 0 0 25.00K 0.00K Thunderstorm Wind (56EG)Boone County2 SSW Boone Muni Arpt 0809Jasper County2 SW Newton 0809Power was knocked out by winds of 65 MPH.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.2200CST0700CST 0 0 0.00K 0.00K Heavy RainOvernight total was 4.71 inches.2200CST0358CST 0 0 0.00K 0.00K Heavy RainRain since 2200 CST was 4.05 inches.Polk County1 S Des Moines 08 2200CST 0 0 0.00K 0.00K Heavy RainStreet flooding at NW 6TH and Aurora in Highland Park. Rainfall was 1.5 inches.Polk County1 S Des Moines 08 2210CST 0 0 0.00K 0.00K Heavy RainStreet flooding at 14th and Euclid.Bremer County1 SSW Plainfield 08 2212CST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Note: The measured wind gust of 56 knots is equivalent to 64 mph.Guthrie County3 W Bayard 08 2220CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Polk County1 N Windsor Hgts 0809Sweet corn was completely blown over with small branches down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.2230CST0130CST 0 0 0.00K 0.00K Heavy RainRainfall over the past 4 hours was 4.10 inches.Bremer County1 NW Tripoli 08 2230CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Dallas County1 SSE Waukee 0809Several tree limbs and branches down in Tripoli.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.2233CST0330CST 0 0 25.00K 0.00K Flash FloodFour to six inches of water over Highway 6 at Highway R22.109

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralPolk County1 E Clover Hills 08 2242CST 0 0 0.00K 0.00K Heavy RainStranded cars at 86th and University.Black Hawk CountyCedar Falls 08 2245CST 0 0 50.00K 0.00K LightningPolk County1 SW Rider 08092300CST0405CST 0 0 0.00K 0.00K Heavy RainPolk County1 E Altoona 0809Story County1 N Nevada 0809Rainfall since midnight was 3.80 inches.2300CST0538CST 0 0 0.00K 0.00K Heavy RainSince last evening, 3.04 inches of rain fell.2300CST0405CST 0 0 0.00K 0.00K Heavy RainRain since 2300 CST was 3.80 inches.Story County1 SW Ames 08 2339CST 0 0 0.00K 0.00K Heavy RainNumerous roads flooded due to to poor drainage including South Dakota, Mortensen, and Lincoln Way. Water to theundercarriages of cars with some stalled.Monroe County1 E Albia 09 0000CST0510CST 0 0 0.00K 0.00K Heavy RainMeasured rainfall since midnight was 4.06 inches. Standing water in yard.Boone County4 SW Ericson 09 0017CST0730CST 0 0 25.00K 0.00K Flash FloodWater over Highway 17 north of Luther, water running into homes and over roads in Moingona in southern Boone County.Polk CountyWindsor Hgts1 NW Clover Hills09 0115CST0600CST 0 0 300.00K 0.00K Flash FloodFour lower level basement units in an eight unit apartment building were inundated with water and three houses nearby on NW75th Street were damaged due to fast rising flood waters from North Walnut Creek. Water was chest deep in one apartmentwith firefighters having to break into apartments with an axe. Water was knee to waist high in the yard of one of the houses.The creek came up in roughly 45 minutes. The nearby Walnut Creek had a record crest early the morning of the 9th.Polk CountyRider 09 0125CST0400CST 0 0 25.00K 0.00K Flash FloodWater flowing out of corn field and across south 19th St between Little Beaver and Highway 141. Depth of flowing water was6 to 8 inches.Jasper County2 SW Newton 09 0130CST 0 0 0.00K 0.00K Heavy RainRainfall since 2200 CST.110

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralPolk County1 E West Des Moines1 ESE Windsor Hgts09 0159CST0400CST 0 0 75.00K 0.00K Flash FloodPublic Works Department in Des Moines and West Des Moines reports water over the road at Grand and 61st.Dallas County1 W Dallas Center 09 0300CST0330CST 0 0 25.00K 0.00K Flash FloodHighway 44 just east of X Ave has running water over the road. Moderate street flooding in Dallas Center.Carroll County1 S Lidderdale 09 0320CST 0 0 0.00K 0.00K Heavy RainOvernight rainfall was 2.30 inches.Hamilton County6 E Randall 09 0332CST 0 0 0.00K 0.00K Heavy RainOvernight rainfall was 2.60 inches.Story County1 WSW Ames Arpt 09 0341CST0730CST 0 0 5.00K 0.00K Flash FloodAirport road closed from Riverside to North Loop due to water over the road.Polk County1 NNE Youngstown 09 0342CST0400CST 0 0 500.00K 0.00K Flash FloodPolk County reports flash flooding in the 4300 block of Fairview near Dean Ave. Flood waters washed away railroad tracksand caused a derailment.Story County2 SE Iowa Center1 N Maxwell09 0342CST0730CST 0 0 25.00K 0.00K Flash FloodStory County Sheriff reports water over the road on County Highway S27 just north of Maxwell, near the Rolling Hills MobileHome Park.Story County1 SW Ames1 NNW Huxley09 0342CST0730CST 0 0 25.00K 0.00K Flash FloodStory County Sheriff reports Highway 69 closed from Ames south to mile post 111 due to water over the road.Boone County1 S Boone 09 0403CST0630CST 0 0 50.00K 0.00K Flash FloodBoone County law reports numerous roads flooded in town as well as flooding along old Highway 30 at Highway 17.Story CountyCambridge 09 0430CST0730CST 0 0 75.00K 0.00K Flash FloodOver 5 inches of rain overnight with street flooding on Pearl Street. Depth of water was up to the door on a pickup truck.111

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralA very unstable airmass was in place over Iowa. Afternoon temperatures warmed into the upper 80s to mid 90s, with dewpointreadings in the upper 70s to low 80s. A weak boundary extended out of eastern Nebraska across northern Iowa. This boundaryhelped to focus moisture. At the same time, a negatively tilted shortwave lifted northeast out of the Rockies into Nebraskaduring the afternoon and early evening. The lifted index fell to -10 to -14 C by evening with CAPE rising to 5000-7000 J/kg inthe very moist airmass. The freezing level was very high, between 16,000 and 17,000 feet. As a result, there was little in theway of hail. The downdraft CAPE was quite high, 800 to 1400 J/kg. Thunderstorms formed in northeast Nebraska. Theyrapidly formed into an upscale MCS, and eventually a full-fledged MCC. Precipitable water values were extremely high, in the2.5 to 2.75 inch range. The primary mode of severe weather with the system was in the form of high wind. Wind gusts of 60 to70 MPH caused sporadic damage across western into central Iowa with tree damage, as well as damage to outbuildings. Thestorms produced one funnel cloud in Carroll County. The high precipitable water values led to very heavy rainfall withwidespread flash flooding. A swath of 2 to 5 inch rainfall extended from west central, through central, into parts of southeastIowa. There were numerous reports of a foot or more of flowing water over streets. Following the flash flooding, waterremained standing on many roads due to the soils across the state being nearly saturated. This resulted in some road closures.The Des Moines metropolitan area was hard hit as 3 to 5 inches of rain fell in 4 hours or less. This caused extensive flooding inthe city. Some evacuations took place. One was at a trailer court along Four Mile Creek on the east side of Des Moines.Numerous roads were closed on the west side as well as Walnut Creek jumped its banks. In fact, the creek set an all-timerecord high stage. Fast rising waters of North Walnut Creek flooded four basement apartment units in Clive with water rescuestaking place. Lightning struck a house in Adel, setting it on fire. The family was asleep at the time and were rescued by thefire department after the house had been on fire for 45 minutes. Damage to the house was around $1,000,000 as it was a totalloss, burned to the ground. In Black Hawk County, lightning struck the water treatment plant in Cedar Falls. Power wasknocked out, resulting in the discharge of 750,000 gallons of sewage into the Cedar River. Lightning struck the historical depotin Carroll, now the Chamber of Commerce, and caused minor damage to the roof. It also knocked out telephone service to 3adjacent buildings.Jasper County1 W Valeria 09170448CST2345CST 0 0 400.00K 500.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.Mahaska County4 WSW Lakonta 09 0530CST0900CST 0 0 10.00K 0.00K Flash FloodFlooding of fields has occurred due to local stream overflowing its banks by as much as three-quarters of a mile. Numerousstreets flooded due to ditches overflowing their banks. Some of the streets had 6 to 8 inches of rushing water over them. 310thstreet was closed just to the northeast of Bussey due to flooding.Story County1 E Kelley 09 0530CST0730CST 0 0 25.00K 0.00K Flash FloodDeep water flowing over the road from a field outside of Kelley and water reported over roads in Kelley.112

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralA very unstable airmass was in place over Iowa. Afternoon temperatures warmed into the upper 80s to mid 90s, with dewpointreadings in the upper 70s to low 80s. A weak boundary extended out of eastern Nebraska across northern Iowa. This boundaryhelped to focus moisture. At the same time, a negatively tilted shortwave lifted northeast out of the Rockies into Nebraskaduring the afternoon and early evening. The lifted index fell to -10 to -14 C by evening with CAPE rising to 5000-7000 J/kg inthe very moist airmass. The freezing level was very high, between 16,000 and 17,000 feet. As a result, there was little in theway of hail. The downdraft CAPE was quite high, 800 to 1400 J/kg. Thunderstorms formed in northeast Nebraska. Theyrapidly formed into an upscale MCS, and eventually a full-fledged MCC. Precipitable water values were extremely high, in the2.5 to 2.75 inch range. The primary mode of severe weather with the system was in the form of high wind. Wind gusts of 60 to70 MPH caused sporadic damage across western into central Iowa with tree damage, as well as damage to outbuildings. Thestorms produced one funnel cloud in Carroll County. The high precipitable water values led to very heavy rainfall withwidespread flash flooding. A swath of 2 to 5 inch rainfall extended from west central, through central, into parts of southeastIowa. There were numerous reports of a foot or more of flowing water over streets. Following the flash flooding, waterremained standing on many roads due to the soils across the state being nearly saturated. This resulted in some road closures.The Des Moines metropolitan area was hard hit as 3 to 5 inches of rain fell in 4 hours or less. This caused extensive flooding inthe city. Some evacuations took place. One was at a trailer court along Four Mile Creek on the east side of Des Moines.Numerous roads were closed on the west side as well as Walnut Creek jumped its banks. In fact, the creek set an all-timerecord high stage. Fast rising waters of North Walnut Creek flooded four basement apartment units in Clive with water rescuestaking place. Lightning struck a house in Adel, setting it on fire. The family was asleep at the time and were rescued by thefire department after the house had been on fire for 45 minutes. Damage to the house was around $1,000,000 as it was a totalloss, burned to the ground. In Black Hawk County, lightning struck the water treatment plant in Cedar Falls. Power wasknocked out, resulting in the discharge of 750,000 gallons of sewage into the Cedar River. Lightning struck the historical depotin Carroll, now the Chamber of Commerce, and caused minor damage to the roof. It also knocked out telephone service to 3adjacent buildings.Story County2 ENE Ames Arpt 0913Story County2 NW Ames 0913Marion County2 WNW Bussey 0912Polk County2 ESE Des Moines 09170535CST2139CST 0 0 50.00K 200.00K Flood0542CST0700CST 0 0 1.00M 5.00K Flood0604CST2021CST 0 0 50.00K 200.00K Flood0637CST2245CST 0 0 10.00K 50.00K FloodPolk County2 N (DSM)Des Moines Intl2 E West Des Moines09170639CST2110CST 0 0 50.00K 10.00K FloodDallas County1 E Bouton 09140643CST1815CST 0 0 100.00K 200.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.113

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralWebster County1 E Gowrie 09 0702CST 0 0 0.00K 0.00K Heavy RainWater over country roads with 3.50 inches of rainfall.Story CountyCambridge 09 0749CST1930CST 0 0 250.00K 0.00K FloodSignificant flooding reported in the town of Cambridge.Wapello County3 ENE Agency 09 0900CST1000CST 0 0 10.00K 0.00K Flash FloodResident had knee deep water on his property that runs off from the farm land near his home. He said it usually is retained byterraces and trenches in the fields but they were not able to keep up.A very unstable airmass was in place over Iowa. Afternoon temperatures warmed into the upper 80s to mid 90s, with dewpointreadings in the upper 70s to low 80s. A weak boundary extended out of eastern Nebraska across northern Iowa. This boundaryhelped to focus moisture. At the same time, a negatively tilted shortwave lifted northeast out of the Rockies into Nebraskaduring the afternoon and early evening. The lifted index fell to -10 to -14 C by evening with CAPE rising to 5000-7000 J/kg inthe very moist airmass. The freezing level was very high, between 16,000 and 17,000 feet. As a result, there was little in theway of hail. The downdraft CAPE was quite high, 800 to 1400 J/kg. Thunderstorms formed in northeast Nebraska. Theyrapidly formed into an upscale MCS, and eventually a full-fledged MCC. Precipitable water values were extremely high, in the2.5 to 2.75 inch range. The primary mode of severe weather with the system was in the form of high wind. Wind gusts of 60 to70 MPH caused sporadic damage across western into central Iowa with tree damage, as well as damage to outbuildings. Thestorms produced one funnel cloud in Carroll County. The high precipitable water values led to very heavy rainfall withwidespread flash flooding. A swath of 2 to 5 inch rainfall extended from west central, through central, into parts of southeastIowa. There were numerous reports of a foot or more of flowing water over streets. Following the flash flooding, waterremained standing on many roads due to the soils across the state being nearly saturated. This resulted in some road closures.The Des Moines metropolitan area was hard hit as 3 to 5 inches of rain fell in 4 hours or less. This caused extensive flooding inthe city. Some evacuations took place. One was at a trailer court along Four Mile Creek on the east side of Des Moines.Numerous roads were closed on the west side as well as Walnut Creek jumped its banks. In fact, the creek set an all-timerecord high stage. Fast rising waters of North Walnut Creek flooded four basement apartment units in Clive with water rescuestaking place. Lightning struck a house in Adel, setting it on fire. The family was asleep at the time and were rescued by thefire department after the house had been on fire for 45 minutes. Damage to the house was around $1,000,000 as it was a totalloss, burned to the ground. In Black Hawk County, lightning struck the water treatment plant in Cedar Falls. Power wasknocked out, resulting in the discharge of 750,000 gallons of sewage into the Cedar River. Lightning struck the historical depotin Carroll, now the Chamber of Commerce, and caused minor damage to the roof. It also knocked out telephone service to 3adjacent buildings.Mahaska County4 WNW Peoria 09241345CST1630CST 0 0 200.00K 250.00K FloodPolk County2 N (DSM)Des Moines Intl2 E Commerce09181706CST0011CST 0 0 50.00K 50.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.114

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralMarion County1 E Swan 09102115CST0315CST 0 0 0.00K 0.00K Heavy RainMahaska County1 SE Oskaloosa 0910Polk County1 SE Lovington 0910Rainfall was 4.7 inches in the past 6 hours.2300CST0508CST 0 0 0.00K 0.00K Heavy RainRainfall since midnight was 3.80 inches.2338CST0008CST 0 0 0.00K 0.00K Heavy RainWithin 30 minutes, 2.30 of rain had fallen.An unstable airmass remained in place over Iowa. CAPE values were in the 3000 to 5000 J/kg range with lifted indices in the -5 to -10 C range. A frontal boundary shifted south during the late afternoon and evening. As the low level jet became moreactive overnight, it impinged on the frontal boundary. As this occurred, moisture pooled along and north of the front withprecipitable water values increasing to 2 to 2.5 inches. Thunderstorms formed in the strong theta-e advection from southeast,through central, into northwest Iowa. Initially the storms lifted northeast with the flow, but as the night progressed, they backdevelopedwith thunderstorms moving over the same areas repeatedly. Two to four inches of rain fell in a band extending fromnear Ottumwa, through Des Moines, to southwest of Fort Dodge, into the Spencer area. Flash flooding was widespread acrossthe area. Some of the worst flooding took place in Mahaska County. Flash flooding, estimated 8 feet deep, swept a car off ofHighway 92 east of Oskaloosa with the car ending up in a soybean field. There were 18 evacuations and rescues in and aroundthe town of Oskaloosa. There was no severe weather reported with this event.Dallas County2 WSW Dawson 10160000CST2056CST 0 0 50.00K 100.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.Polk County1 N Grimes 10 0026CST0600CST 0 0 25.00K 0.00K Flash FloodCreek just west of the intersection of James St and NW 7th Street Place is out of its banks and inundating yards and bike path atleast 30 feet out of banks.Polk County2 ESE Lovington 10 0040CST0600CST 0 0 25.00K 0.00K Flash FloodFour feet of flowing water down the street at Aurora and 30th St.Polk County1 N Grimes 10 0120CST0600CST 0 0 50.00K 0.00K Flash FloodCreek near James St and NW 7th Street Place is now 50 to 75 feet wide.115

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralPolk County1 NE Grimes 10 0135CST0600CST 0 0 100.00K 0.00K Flash FloodWater from flooded creek flowing over James Road and inundating a few houses along the creek on 7th Street Place. Creekextending to the 1800 block.Dallas County1 N Hadden Hill 10 0136CST0600CST 0 0 10.00K 0.00K Flash FloodWater over V Ave and 156th due to Walnut Creek.Marion County1 NE Fifield 10 0244CST0600CST 0 0 10.00K 0.00K Flash FloodWater flowing over Highway 163 near mile post 36, water 5 inches deep.Polk County2 ESE Avon 10 0246CST0600CST 0 0 75.00K 0.00K Flash FloodOne house had basement walls collapse due to heavy rain in the Avon Lakes area.Mahaska County1 NE Keomah 10 0325CST0730CST 0 0 50.00K 0.00K Flash FloodSeveral people were trapped and stranded in the Keomah area in eastern Oskaloosa.Mahaska County1 SE Oskaloosa1 SW Keomah10 0438CST0730CST 0 0 200.00K 0.00K Flash FloodIowa DOT and local media report Highway 92 closed east of Oskaloosa due to the flooding from Spring Creek.Marion County1 E Swan 10 0442CST 0 0 0.00K 0.00K Heavy RainRainfall total was 4.70 inches.Mahaska County1 SE Oskaloosa 10 0600CST 0 0 0.00K 0.00K Heavy RainMahaska County1 W Oskaloosa Roth Arpt1 NW OskaloosaRainfall from overnight was 4 inches.10 0636CST0730CST 0 0 500.00K 0.00K Flash FloodWater receding but still flooding in Oskaloosa. Numerous houses inundated in town with 18 people rescued.Mahaska County1 W Cedar3 ESE Givin10 0636CST0730CST 0 0 250.00K 0.00K Flash FloodSeveral homes in Wright were flooded.116

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralAn unstable airmass remained in place over Iowa. CAPE values were in the 3000 to 5000 J/kg range with lifted indices in the -5 to -10 C range. A frontal boundary shifted south during the late afternoon and evening. As the low level jet became moreactive overnight, it impinged on the frontal boundary. As this occurred, moisture pooled along and north of the front withprecipitable water values increasing to 2 to 2.5 inches. Thunderstorms formed in the strong theta-e advection from southeast,through central, into northwest Iowa. Initially the storms lifted northeast with the flow, but as the night progressed, they backdevelopedwith thunderstorms moving over the same areas repeatedly. Two to four inches of rain fell in a band extending fromnear Ottumwa, through Des Moines, to southwest of Fort Dodge, into the Spencer area. Flash flooding was widespread acrossthe area. Some of the worst flooding took place in Mahaska County. Flash flooding, estimated 8 feet deep, swept a car off ofHighway 92 east of Oskaloosa with the car ending up in a soybean field. There were 18 evacuations and rescues in and aroundthe town of Oskaloosa. There was no severe weather reported with this event.Story County3 N Ames 10121300CST1906CST 0 0 500.00K 50.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.Sac County2 E Sac City 10 1457CST 0 0 0.00K 0.00K Funnel CloudWebster County3 N Burnside 10 1600CST1930CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.9 inches since 1600 CST.Humboldt County1 S Thor 10 1644CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Windows blown out by estimated winds of 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Emmet County7 NNE Armstrong 10 1644CST1645CST 0.18 40 0 0 0.00K 0.00K Tornado (EF0)A tornado formed and touched down briefly over Iowa Lake.117

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralPhoto of a brief tornado touchdown over Lake Iowa. The funnel cloud was visible for some time beforethis and this tornado touched down briefly over the water. No damage occurred as it lifted before theparent storm moved over land. Photo is courtesy of the Armstrong Fire Department.Wright CountyEagle Grove 10 1656CST 0 0 2.00K 0.00K Thunderstorm Wind (53MG)Measured by a schoolnet site.Note: The measured wind gust of 53 knots is equivalent to 61 mph.Calhoun CountyPomeroy 10 1700CST 0 0 0.00K 0.00K Heavy RainCalhoun County Law Enforcement reports streets in Pomeroy inundated as well as many county roads. Highway 4 in Pomeroyhad standing water 2 feet deep in underpasses.Webster County1 NE Lundgren 10 1700CST2015CST 0 0 0.00K 0.00K Heavy RainTwo and one half inches of rain since 1700 CST.Calhoun CountyRockwell City 10 1715CST 0 0 2.00K 0.00K Hail (1.00)Quarter size hail was reported at the police station.Webster County1 S Callender 10 1757CST 0 0 0.00K 0.00K Heavy RainPublic reports of standing water 2 feet deep surrounding homes in Callender, with additional water flowing from fields andyards.Hamilton County6 E Randall 10111800CST0517CST 0 0 0.00K 0.00K Heavy RainWebster County2 W Clay Works2 WNW RobertsRainfall since Tuesday night was 5.2 inches.10111850CST0000CST 0 0 250.00K 0.00K Flash FloodHighway 169 was closed and impassable at the intersection of U.S. 20 Business in southern Fort Dodge.118

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralWebster County2 W Clay Works 10 1915CST 0 0 0.00K 0.00K Heavy RainRoad closure at Highway 169, 4 miles north of Highway 20. Estimated 2 to 3 feet of standing water on underpasses withseveral cars stalled.Calhoun County2 WNW Yetter 10 1926CST 0 0 5.00K 10.00K Hail (1.25)Trained spotter reported half dollar to possibly golf gall size hail.Webster County1 NNW Moorland 10111930CST0000CST 0 0 50.00K 0.00K Flash FloodOld Highway 20 underpass closed and impassable due to high water.Webster County2 NNE Burnside1 NNW Lehigh10111930CST0000CST 0 0 100.00K 0.00K Flash FloodHamilton County1 NE Stanhope 1011Washout in Dolliver State Park.2007CST0000CST 0 0 100.00K 0.00K Flash FloodHamilton County Law Enforcement reports Highway 17 closed in Stanhope with water 3 feet deep over roads and storm sewersbacking up into homes.Polk CountyPolk City 10112007CST0207CST 0 0 0.00K 0.00K Heavy RainMeasured rainfall was 4.94 inches at an automated gage near Big Creek in the last 6 hours.Boone County4 SSW Mackey 10112013CST0213CST 0 0 0.00K 0.00K Heavy RainSix inches of storm total rainfall since 1900 CST Tuesday night. Reported 3 miles south of Highway E18 on Highway 17.Webster County1 NE Lundgren 10112015CST0000CST 0 0 50.00K 0.00K Flash FloodWater rushing over gravel road. Small creek by house was over its banks and observer said he hadn't seen runoff like thisbefore.Webster County3 N Burnside2 W Lehigh10112020CST0000CST 0 0 100.00K 0.00K Flash FloodWater flowing over gravel roads with 3.9 inches of rainfall measured at 1930 CST. Additional rain from 2000 to 2020 CST.Bremer CountyWaverly 10112023CST0230CST 0 0 50.00K 0.00K Flash FloodWater up to the top of tires on vehicles located at the intersection of 3rd Ave and 4th Street in northwest Waverly.119

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralCalhoun CountyPomeroy 10 2030CST 0 0 0.00K 0.00K Heavy RainHighway 7 closed at underpass in Pomeroy due to flooding.Once again the atmosphere over Iowa became very unstable during the peak heating of the day. CAPE rose to 3500-4500 J/kgby the mid to late afternoon with lifted indices of -8 to -10 C. The moisture pooled over the state with precipitable water valuesapproaching 2 inches by evening. High temperatures reached the upper 80s to low 90s, with dewpoints topping out in the upper70s to low 80s. The atmosphere was fairly weakly sheared with 30 kts of available shear. Downdraft CAPE was between 1000and 1800 J/kg. Available CAPE in the -10 to -30 C layer of the atmosphere was 800-1100 J/kg, but hail was limited by thehigh freezing level, 16,000 to 16,500 feet. Quarter size hail fell in Calhoun County as an intense storm passed though. Thesame storm cluster produced a funnel cloud in Sac County earlier. Scattered winds occurred with the storms. A 61 MPH windgust was recorded in Eagle Grove for example and windows were blown out in Humboldt County south of Thor. One of thethunderstorms produced a tornado in Emmet County. The tornado touched down briefly over Lake Iowa. Thunderstormsbecame more organized during the evening and produced very heavy rainfall. In addition to the rainfall, scattered reports ofhigh winds and some hail up to an inch and one quarter in size were received. Most of the wind reports were around 60 MPH.By far the most significant weather was the heavy rainfall. Three to 5 inches of rain fell on saturated ground, resulting in a verywidespread flash flood event. Nearly half of the CWA was involved from parts of north central Iowa south to the Missouriborder. Numerous roads were covered with flowing water of 1 to 2 feet in depth. Lightning struck a car at mile post 105 onInterstate 35 in Story County. No injuries were reported. Lightning also struck a house in Ankeny, causing a fire. The flashflooding claimed one life in central Iowa. Three vehicles were swept into the waters of Mud Creek near Altoona in PolkCounty. There were 11 people involved. A rescue call was made to save the occupants of the cars. One 16 year old femaleperished in the flood waters, the other 10 were rescued, though 4 were injured and received treatment at a local hospital. Theflash flooding transitioned into widespread flooding as the night progressed into the day of the 11th. Flash flooding resulted inevacuations of apartments and trailer courts on the east side of Des Moines. Interstate 35 was covered by water due to flashflooding at mile post 97. Several cars spun out in the flood waters. Very intense rainfall in the Ames area resulted in a recordcrest on Squaw Creek. The creek crested 1.5 to 2.5 feet above the record high stage. Major flooding took place and the watertreatment plant was inundated. Major damage was done to several buildings on the Iowa State Campus. Damage to Iowa Statealone was between $40,000,000 and $50,000,000. Flooding from the Skunk River closed U.S. Highway 30. Thirty peoplewere rescued at a Wal-Mart store in Ames as well. Following the severe flooding, several Iowa counties were added to thePresidential Disaster Declaration number 1930. The original 32 were: Adams, Appanoose, Audubon, Buena Vista, Butler,Cherokee, Clay, Davis, Decatur, Franklin, Howard, Humboldt, Iowa, Lee, Lyon, Madison, Marion, Mills, Monroe,Montgomery, OâBrien, Osceola, Palo Alto, Ringgold, Shelby, Union, Van Buren, Wapello, Warren, Wayne, Webster andWright. Eighteen were added to the original, incuding: Black Hawk, Boone, Buchanan, Clayton, Delaware, Dickinson,Dubuque, Emmet, Fayette, Guthrie, Jackson, Jasper, Jones, Lucas, Mahaska, Polk, Sioux and Story. In addition, GovernorChet Culver had issued disaster proclamations for 50 Iowa counties due to inclement weather since June 1, 2010: Appanoose,Black Hawk, Boone, Buchanan, Buena Vista, Butler, Cherokee, Clay, Clayton, Davis, Decatur, Delaware, Dickinson, Dubuque,Emmet, Fayette, Franklin, Hamilton, Hancock, Howard, Humboldt, Jackson, Jasper, Jefferson, Johnson, Jones, Kossuth, Lee,Lucas, Lyon, Mahaska, Marion, Monona, Monroe, O'Brien, Osceola, Palo Alto, Polk, Ringgold, Shelby, Sioux, Story, Taylor,Union, Van Buren, Wapello, Warren, Washington, Webster and Wright.Webster County7 ESE Lehigh4 NE Dayton10132041CST0548CST 0 0 5.00K 200.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.Black Hawk County1 SW Waterloo Ranch Arpt 10 2045CST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)Tree fell through a roof of a house along Fulton Street.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.120

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralCalhoun County1 NE Lytton 10112050CST0000CST 0 0 10.00K 0.00K Flash FloodCounty Road N28 under water at the intersection with 240th St.Calhoun County1 SSW Knierim 10112050CST0000CST 0 0 10.00K 0.00K Flash FloodStory County1 SW Ontario 1011County Road P19 is under water 2 miles north of Highway 20.2052CST0252CST 0 0 0.00K 0.00K Heavy RainRainfall since 2100 CST was 3.86 inches.Tama County1 SE Montour 10 2053CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Greene County1 E Hope 1011Large tree down on County Highway T47.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.2054CST0200CST 0 0 25.00K 0.00K Flash FloodWater over County Highway P46 just south of the Webster County line.Boone County2 W Mackey 10112057CST0200CST 0 0 10.00K 0.00K Flash FloodRoads closed include 130th Street from Highway 17 to the county line. Water rushing over the road 4 to 5 inches deep and 50feet wide.Polk County2 SW Enterprise 10112100CST0030CST 0 0 0.00K 0.00K Heavy RainStory County1 NE Story City 1011Rainfall since 2100 CST was 3.83 inches.2105CST0200CST 0 0 25.00K 0.00K Flash FloodBroad Street was closed at Forest Ave in Story City due to water running over the road.Hamilton County6 E Randall 10 2123CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.5 inches and still raining with ditches full. Shallow water pooling around machine shed.Story County1 N Story City 10112129CST0200CST 0 0 500.00K 0.00K Flash FloodStory City police reported widespread flooding throughout Story City. Had multiple reports of basement flooding with waterbacking up into them.121

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralHamilton County1 N Jewell 10112130CST0000CST 0 0 25.00K 0.00K Flash FloodIntersection of Highway 69 and County Highway D65/380th Street near Jewell has deep water over the road.Hamilton County3 E Stratford 10112130CST0000CST 0 0 10.00K 0.00K Flash FloodHighway 175 at the intersection of Fenton Ave is closed due to high water.Webster County6 E Dayton 10112130CST0000CST 0 0 25.00K 0.00K Flash FloodHighway 175 west of Stratford has 2 to 3 feet of water running over the road.Story County4 S Zearing 10112148CST0200CST 0 0 25.00K 0.00K Flash FloodWater running over Highway 65 just south of Zearing.Polk County2 W Oralabor 10 2200CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Polk County1 NE Ankeny 1011A trained spotter estimated wind gusts of 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.2210CST0330CST 0 0 25.00K 0.00K Flash FloodNorth Ankeny Boulevard and NE 9th Street was closed due to 16 to 18 inches of water in the intersection.Hamilton County2 ESE Webster City Arpt 10 2222CST 0 0 0.00K 0.00K Heavy RainMeasured rainfall total of 3.75 inches.Cass County1 W Cumberland 10 2229CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Spotter estimated wind gust of 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cass County1 W Cumberland 10 2240CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Polk CountyAnkeny 1011Four inch tree branches blown down by thunderstorm winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.2316CST0330CST 0 0 25.00K 0.00K Flash FloodDeep impassable water at the intersection of west 1st Street and SW State Street in Ankeny.Polk County2 E Ankeny 10112320CST0330CST 0 0 25.00K 0.00K Flash FloodUp to 18 inches of running water across the intersectio nof SE 4th and Trilein in Ankeny.122

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralStory CountyMidvale 10 2320CST 0 0 1.00K 0.00K LightningLightning struck a car on Interstate 35 at mile post 105. No injuries reported.Polk County2 W Elkhart 10112331CST0330CST 0 0 50.00K 25.00K Flash FloodAt least 6 inches of water running across Interstate 35 at mile post 97. Multiple cars spun out.Dallas County2 W Woodward 10 2353CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Polk County2 ENE Ankeny 1011Grundy County6 NW Fern 1011The emergency manager estimated winds of 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.2354CST0330CST 0 0 25.00K 0.00K Flash FloodRunning water 2 feet deep on Delaware Ave in the 400 block.2355CST0230CST 0 0 25.00K 0.00K Flash FloodWater from an unknown creek overflowed onto 120th Street between H Ave and I Ave in northern Grundy County.Grundy County3 NW Fern 10112355CST0230CST 0 0 10.00K 0.00K Flash FloodWater of unknown depth running over 120th Street between I Ave and L Ave.Polk County1 NE Ankeny 11 0025CST0330CST 0 0 25.00K 0.00K Flash FloodQuick flowing water 4 to 5 inches in depth covering the intersection of Crestmoor Place and Northeast 6th Street.Marion County1 NNW Tracy 11 0035CST0430CST 0 0 10.00K 0.00K Flash FloodWater reported over 2 lanes of Highway T25 one quarter mile south of Highway 92.Marion County1 E Harvey 11 0035CST0430CST 0 0 50.00K 0.00K Flash FloodSix inches of water reported running through the streets of Harvey.Story County1 NE Story City 11 0037CST 0 0 0.00K 0.00K Heavy RainRainfall of 4.20 inches was measured by an automated rain gage.123

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralMonroe County2 NNW Georgetown 11 0326CST0614CST 0 0 10.00K 0.00K Flash FloodWater covering the road due to the Whippoorwill Creek at 170th Street.Polk County1 SW Santiago1 E Altoona11 0355CST0600CST 1 4 100.00K 25.00K Flash FloodWater rescue in progress regarding three vehicles with a total of 11 people near NE 8th Ave and NE 54th Ave. There was onefatality, 10 rescues and several injuries. F16VEPolk County3 NNE Ankeny 11 0400CST 0 0 20.00K 0.00K LightningHouse fire in north Ankeny caused by lightning.Polk County1 NW Santiago 11 0440CST0700CST 0 0 50.00K 25.00K Flash FloodFlooding along Mud Creek.Webster County3 N Burnside 11 0530CST 0 0 0.00K 0.00K Heavy RainOvernight rainfall was 4.70 inches.Once again the atmosphere over Iowa became very unstable during the peak heating of the day. CAPE rose to 3500-4500 J/kgby the mid to late afternoon with lifted indices of -8 to -10 C. The moisture pooled over the state with precipitable water valuesapproaching 2 inches by evening. High temperatures reached the upper 80s to low 90s, with dewpoints topping out in the upper70s to low 80s. The atmosphere was fairly weakly sheared with 30 kts of available shear. Downdraft CAPE was between 1000and 1800 J/kg. Available CAPE in the -10 to -30 C layer of the atmosphere was 800-1100 J/kg, but hail was limited by thehigh freezing level, 16,000 to 16,500 feet. Quarter size hail fell in Calhoun County as an intense storm passed though. Thesame storm cluster produced a funnel cloud in Sac County earlier. Scattered winds occurred with the storms. A 61 MPH windgust was recorded in Eagle Grove for example and windows were blown out in Humboldt County south of Thor. One of thethunderstorms produced a tornado in Emmet County. The tornado touched down briefly over Lake Iowa. Thunderstormsbecame more organized during the evening and produced very heavy rainfall. In addition to the rainfall, scattered reports ofhigh winds and some hail up to an inch and one quarter in size were received. Most of the wind reports were around 60 MPH.By far the most significant weather was the heavy rainfall. Three to 5 inches of rain fell on saturated ground, resulting in a verywidespread flash flood event. Nearly half of the CWA was involved from parts of north central Iowa south to the Missouriborder. Numerous roads were covered with flowing water of 1 to 2 feet in depth. Lightning struck a car at mile post 105 onInterstate 35 in Story County. No injuries were reported. Lightning also struck a house in Ankeny, causing a fire. The flashflooding claimed one life in central Iowa. Three vehicles were swept into the waters of Mud Creek near Altoona in PolkCounty. There were 11 people involved. A rescue call was made to save the occupants of the cars. One 16 year old femaleperished in the flood waters, the other 10 were rescued, though 4 were injured and received treatment at a local hospital. Theflash flooding transitioned into widespread flooding as the night progressed into the day of the 11th. Flash flooding resulted inevacuations of apartments and trailer courts on the east side of Des Moines. Interstate 35 was covered by water due to flashflooding at mile post 97. Several cars spun out in the flood waters. Very intense rainfall in the Ames area resulted in a recordcrest on Squaw Creek. The creek crested 1.5 to 2.5 feet above the record high stage. Major flooding took place and the watertreatment plant was inundated. Major damage was done to several buildings on the Iowa State Campus. Damage to Iowa Statealone was between $40,000,000 and $50,000,000. Flooding from the Skunk River closed U.S. Highway 30. Thirty peoplewere rescued at a Wal-Mart store in Ames as well. Following the severe flooding, several Iowa counties were added to thePresidential Disaster Declaration number 1930. The original 32 were: Adams, Appanoose, Audubon, Buena Vista, Butler,Cherokee, Clay, Davis, Decatur, Franklin, Howard, Humboldt, Iowa, Lee, Lyon, Madison, Marion, Mills, Monroe,Montgomery, OâBrien, Osceola, Palo Alto, Ringgold, Shelby, Union, Van Buren, Wapello, Warren, Wayne, Webster andWright. Eighteen were added to the original, incuding: Black Hawk, Boone, Buchanan, Clayton, Delaware, Dickinson,Dubuque, Emmet, Fayette, Guthrie, Jackson, Jasper, Jones, Lucas, Mahaska, Polk, Sioux and Story. In addition, GovernorChet Culver had issued disaster proclamations for 50 Iowa counties due to inclement weather since June 1, 2010: Appanoose,Black Hawk, Boone, Buchanan, Buena Vista, Butler, Cherokee, Clay, Clayton, Davis, Decatur, Delaware, Dickinson, Dubuque,Emmet, Fayette, Franklin, Hamilton, Hancock, Howard, Humboldt, Jackson, Jasper, Jefferson, Johnson, Jones, Kossuth, Lee,Lucas, Lyon, Mahaska, Marion, Monona, Monroe, O'Brien, Osceola, Palo Alto, Polk, Ringgold, Shelby, Sioux, Story, Taylor,Union, Van Buren, Wapello, Warren, Washington, Webster and Wright.124

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralDallas County2 NNE Van Meter 11 0610CST1722CST 0 0 10.00K 10.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.Polk County1 S Des Moines1 S Capitol Hgts11 0630CST0800CST 0 0 100.00K 0.00K Flash FloodEvacuations taking place from 3325 Hubble Ave at an apartment complex to 3560 Douglas Ave near a trailer Park in east DesMoines.Polk County1 E Altoona 11 0817CST 0 0 0.00K 0.00K Heavy RainA trained spotter measured 3.34 inches of rain overnight in Altoona.Webster CountyGowrie 11120900CST0000CST 0 0 200.00K 0.00K FloodSeveral gravel roads closed by water in the Gowrie area that did not have a history of flooding. Overnight rainfall was 1.7inches, with 7.7 inches in past 3 days.Hamilton County2 ESE Stanhope3 E Stratford11121102CST0000CST 0 0 200.00K 50.00K FloodHighway 17 was still closed due to flooding. County Highway R27 also closed south of Highway 175. Numerous gravel roadsunder several feet of water.Story County1 SW Ames2 SE Ontario11121107CST0130CST 0 0 50.00M 0.00K FloodHilton Coliseum reported 4 to 6 feet of water inside flooding the stadium and basketball floor. Cy Stephens Auditorium alsoreports water in the mechanical building up to the 1st floor.125

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralOnce again the atmosphere over Iowa became very unstable during the peak heating of the day. CAPE rose to 3500-4500 J/kgby the mid to late afternoon with lifted indices of -8 to -10 C. The moisture pooled over the state with precipitable water valuesapproaching 2 inches by evening. High temperatures reached the upper 80s to low 90s, with dewpoints topping out in the upper70s to low 80s. The atmosphere was fairly weakly sheared with 30 kts of available shear. Downdraft CAPE was between 1000and 1800 J/kg. Available CAPE in the -10 to -30 C layer of the atmosphere was 800-1100 J/kg, but hail was limited by thehigh freezing level, 16,000 to 16,500 feet. Quarter size hail fell in Calhoun County as an intense storm passed though. Thesame storm cluster produced a funnel cloud in Sac County earlier. Scattered winds occurred with the storms. A 61 MPH windgust was recorded in Eagle Grove for example and windows were blown out in Humboldt County south of Thor. One of thethunderstorms produced a tornado in Emmet County. The tornado touched down briefly over Lake Iowa. Thunderstormsbecame more organized during the evening and produced very heavy rainfall. In addition to the rainfall, scattered reports ofhigh winds and some hail up to an inch and one quarter in size were received. Most of the wind reports were around 60 MPH.By far the most significant weather was the heavy rainfall. Three to 5 inches of rain fell on saturated ground, resulting in a verywidespread flash flood event. Nearly half of the CWA was involved from parts of north central Iowa south to the Missouriborder. Numerous roads were covered with flowing water of 1 to 2 feet in depth. Lightning struck a car at mile post 105 onInterstate 35 in Story County. No injuries were reported. Lightning also struck a house in Ankeny, causing a fire. The flashflooding claimed one life in central Iowa. Three vehicles were swept into the waters of Mud Creek near Altoona in PolkCounty. There were 11 people involved. A rescue call was made to save the occupants of the cars. One 16 year old femaleperished in the flood waters, the other 10 were rescued, though 4 were injured and received treatment at a local hospital. Theflash flooding transitioned into widespread flooding as the night progressed into the day of the 11th. Flash flooding resulted inevacuations of apartments and trailer courts on the east side of Des Moines. Interstate 35 was covered by water due to flashflooding at mile post 97. Several cars spun out in the flood waters. Very intense rainfall in the Ames area resulted in a recordcrest on Squaw Creek. The creek crested 1.5 to 2.5 feet above the record high stage. Major flooding took place and the watertreatment plant was inundated. Major damage was done to several buildings on the Iowa State Campus. Damage to Iowa Statealone was between $40,000,000 and $50,000,000. Flooding from the Skunk River closed U.S. Highway 30. Thirty peoplewere rescued at a Wal-Mart store in Ames as well. Following the severe flooding, several Iowa counties were added to thePresidential Disaster Declaration number 1930. The original 32 were: Adams, Appanoose, Audubon, Buena Vista, Butler,Cherokee, Clay, Davis, Decatur, Franklin, Howard, Humboldt, Iowa, Lee, Lyon, Madison, Marion, Mills, Monroe,Montgomery, OâBrien, Osceola, Palo Alto, Ringgold, Shelby, Union, Van Buren, Wapello, Warren, Wayne, Webster andWright. Eighteen were added to the original, incuding: Black Hawk, Boone, Buchanan, Clayton, Delaware, Dickinson,Dubuque, Emmet, Fayette, Guthrie, Jackson, Jasper, Jones, Lucas, Mahaska, Polk, Sioux and Story. In addition, GovernorChet Culver had issued disaster proclamations for 50 Iowa counties due to inclement weather since June 1, 2010: Appanoose,Black Hawk, Boone, Buchanan, Buena Vista, Butler, Cherokee, Clay, Clayton, Davis, Decatur, Delaware, Dickinson, Dubuque,Emmet, Fayette, Franklin, Hamilton, Hancock, Howard, Humboldt, Jackson, Jasper, Jefferson, Johnson, Jones, Kossuth, Lee,Lucas, Lyon, Mahaska, Marion, Monona, Monroe, O'Brien, Osceola, Palo Alto, Polk, Ringgold, Shelby, Sioux, Story, Taylor,Union, Van Buren, Wapello, Warren, Washington, Webster and Wright.Marshall County2 ESE Minerva2 W MarshalltownRadar rainfall estimates for the previous 24 hour period ending 1200 UTC Wed 11 Aug 2010. Radar fromthe NWS, graphic rendering from The Des Moines Register.11122330CST2200CST 0 0 25.00K 10.00K Flood126

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralButler County3 ESE New Hartford 1213Dallas County2 NNE Van Meter 13150345CST1100CST 0 0 10.00K 5.00K Flood0600CST1943CST 0 0 25.00K 100.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.Taylor CountyBedford 13 1120CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)High winds downed large tree branches in Bedford.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Appanoose County1 E Jerome 13 1245CST 0 0 3.00K 0.00K Thunderstorm Wind (57EG)Spotter estimated 60 to 70 MPH wind gust.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Appanoose CountyCenterville 13 1301CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Winds was 40 MPH sustained, with gusts to 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Davis County4 WSW West Grove 13 1325CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Spotter estimated winds gusting up to 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Davis County3 ESE Floris 13 1335CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Large trees were blown down onto a gravel road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Wapello County1 W Ottumwa 13 1340CST2125CST 0 0 100.00K 0.00K Flash FloodA trained spotter in Ottumwa reported water flowing through the streets deep enough to stall multiple vehicles. He alsoestimated 2 inches of rain in the last hour.Davis CountyPulaski 13 1347CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Fire department reported winds gusts of up to 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.127

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralDavis County2 SSW Carbon 13 1500CST2125CST 0 0 25.00K 0.00K Flash FloodAppanoose County1 SW Darbyville1 WNW RathbunBridge impassable due to flash flooding.13 1725CST2125CST 0 0 25.00K 0.00K Flash FloodWater of unknown depth was flowing over paved County Road J29 at a rapid pace. Road was barricaded.Appanoose County1 W Mystic 13 1907CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Trained spotter near Mystic reports 2 large trees and numerous branches and limbs down from severe straight line winds.Appanoose County2 SSW Moulton Arpt3 WSW DeanA cold front entered the state from the northwest. The atmosphere became very unstable with CAPE rising to near 5000 J/kgand lifted indices falling to around -10 C. There was strong moisture inflow ahead of a pre-frontal trough and upper levelshortwave moving across the state. Thunderstorms fired over southwest Iowa by mid morning and tracked east-northeast. Theatmosphere was quite warm with freezing levels near 15,000 ft. Little hail occurred with the storms. Downdraft CAPEincreased to around 1400 J/kg ahead of the storms in southeast Iowa. Thunderstorms formed initially over southwest Iowa andmoved northeast and east. Thunderstorms caused high winds in the Bedford area of Taylor County, causing damage in thetown. Downburst winds began to take place with 60 to 70 MPH wind gusts reported in Davis and Appanoose Counties. Thestorms also produced very heavy rainfall. Rainfall of 2 inches in less than an hour occurred in Wapello County, resulting inflash flooding in Ottumwa. The initial round of thunderstorms moved east of the area. By later afternoon and early evening,thunderstorms reformed over northern Missouri and pushed northeast into southeast Iowa. They produced spotty high windsand another round of heavy rainfall. Flash flooding resulted from the heavy rainfall. Water was flowing over roads with somebridges were under water in Appanoose and Davis Counties. Note: The estimated wind gust of 52 knots is equivalent to 60mph.13142122CST1600CST 0 0 5.00K 5.00K FloodThe very wet weather pattern of June and July continued into the first two weeks of August. Central Iowa was hardest hit byrainfall with three consecutive nights of torrential rains on the 8th, 9th and 10th. Ankeny recorded 9.86 inches of rain over thesethree nights while Ames had 9.61 inches. Record flooding impacted much of Story, Polk, Jasper and Mahaska counties. Iowareceived a much needed break from the heavy rainfall for most of the second half of the month with a statewide average of only0.91 inches between 14th and the morning of the 31st. Moderate to heavy rain fell on the night of the 31st into early September1st over the southeast two-thirds of Iowa with the Ames Airport recording 4.13 inches. Most official reporting points recordrainfall once daily at about 7 a.m. CDT, thus in many cases the rain of late August 31 will go into the record books forSeptember 1. Monthly rain totals for August (through 7 a.m. August 31) varied from only 1.03 inches at Guttenberg to 16.07inches at Urbandale. August rainfall was well below normal over much of north central, northeast and far southwest Iowa. Theflooding was major along the Skunk and parts of the lower Des Moines River basin. Following the flash flooding of the 10thand 11th, major river flooding continued. Significant crop losses occurred because of the high water flooding fields for severaldays. Major damage was done along the Skunk Basin from Ames, through Colfax. Water from the South Skunk Rivercompletely covered portions of US Highway 30 near Ames and Interstate 35 just south of Ames. The water system wasknocked out in Ames, and threatened in Colfax. Highway 117 just south of Interstate 80 was closed and barricaded due towater over the road from the South Skunk near Colfax. Significant damage occurred along the Des Moines River in Eddyvilleas well as Ottumwa with the river in major flood for several days.Madison County4 ENE Winterset Arpt 20 1030CST1255CST 0 0 0.00K 0.00K Heavy RainRainfall of 1.8 inches was measured since 1030 CDT.Wapello County(OTM)Ottumwa Indstrl 20 1400CST1800CST 0 0 0.00K 0.00K Heavy RainRainfall total was 4.54 inches.128

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralWapello County1 N (OTM)Ottumwa Indstrl 20 1430CST1535CST 0 0 0.00K 0.00K Heavy RainRainfall at the Ottumwa airport was measured at 4.2 inches within just over an hours time.Wapello County1 E (OTM)Ottumwa Indstrl 20 1445CST2100CST 0 0 50.00K 0.00K Flash FloodFridayâs heavy rain caused water to come up rapidly on U.S. Highway 63, just north of Ottumwa and before Angle Road.Heavy rain caused water to come up rapidly on U.S. Highway 63, just north of Ottumwa. In some areas thewater was five feet deep. The Wapello County EM coordinator said deputies evacuated a day care in thearea using a boat and jet ski to transport children, adults and some animals. Photo courtesy: Ottumwa Courier.Wapello County1 N Ottumwa 20 1522CST2100CST 0 0 25.00K 0.00K Flash FloodTrained spotter reports water flowing over the road and blocking traffic near the intersection of Pennsylvania Ave and JeffersonStreet.Wapello County2 W Dahlonega2 NNW Ottumwa20 1524CST2100CST 0 0 250.00K 0.00K Flash FloodLocal law enforcement and trained spotters report water flowing over Highway 149 and North Court Road in the 2600 to 2700block on the north side of Ottumwa. Water was up to the windows of cars with vehicles stalling and traffic backing up.129

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralFlash flooding over Highway 149 in Ottumwa. Photo provided by Josh Stevens, Coordinator Wapello CountyEmergency Management / Homeland Security.Wapello County3 ESE (OTM)Ottumwa Indstrl 20 1530CST2 NNW Dahlonega2100CST 0 0 100.00K 0.00K Flash FloodTrained spotter reports water flowing over the road near the intersection of Angle Road and Highway 149 in north Ottumwa.Wapello County3 WNW Ottumwa 20 1550CST2100CST 0 0 25.00K 0.00K Flash FloodSix inches of flowing water across Eddyville Road. Cars stalled.Davis CountyPulaski 20 1550CST 0 0 25.00K 0.00K Thunderstorm Wind (52EG)A storage facility was damaged by thunderstorms winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Wapello County3 ESE (OTM)Ottumwa Indstrl 20 2014CST2 WNW Dahlonega2100CST 0 0 25.00K 0.00K Flash FloodLocal law enforcement reports water from the Little Cedar Creek rushing over Angle Road just east of Highway 149 on thenorth side of Ottumwa.An unstable airmass was located over Iowa. A cold front moved into the western part of the state during the afternoon.Thunderstorms erupted around mid day and tracked east across the southern and eastern part of the state. Though CAPE roseto 4000-5000 J/kg and the lifted index fell to between -7 and -9 C, severe weather was limited. Gusty winds occurred, alongwith some small hail, but the most significant event was the heavy rainfall. Precipitable water values increased to between 1.8and 2.3 inches by early afternoon. The storms became efficient rainfall producers. In Madison County, nearly 2 inches of rainfell in a two hour period. The storms were more intense as they moved through the Ottumwa area in Wapello County. Rainfallof 4-5 inches occurred in the Ottumwa area. In just over an hour, 4.2 inches fell at the Ottumwa Airport. Flooding occurredvery quickly along U.S. Highway 63 as shown in a photo. The photo was taken a little over an hour after the heavy rain beganwith water 5 feet deep over the highway. The water eventually reached a depth of 20 feet over the highway. Flash floodingoccurred north and east of the city of Ottumwa. Roads were close by flowing water as deep as car windows in places. Rapidlyrising water required that a daycare center on the north side of Ottumwa be evacuated. As the thunderstorms continued tomove eastward, thunderstorms produced strong winds in the Pulaski area. A storage facility was damaged in town.130

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralEmmet County1 E Ringsted 31 1400CST1521CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.65 inches since 1400 CST.Winnebago CountyBuffalo Center 31 1532CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Thunderstorms produced wind gusts of around 60 MPH, toppling several trees in the city park.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Winnebago CountyBuffalo Center 31 1540CST 0 0 30.00K 0.00K Thunderstorm Wind (70EG)High winds snapped the top off of a power pole.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Carroll County1 E Templeton 31 1818CST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)No damage was reported.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Greene County5 NE Farlin 31 1852CST 0 0 0.00K 5.00K Hail (0.88)Pea to nickel size hail.Greene County5 NE Farlin 31 1852CST 0 0 2.00K 10.00K Thunderstorm Wind (52EG)Winds approaching 60 MPH were estimated. Limbs of up to 6 inch in diameter were broken with pea to nickle size hail.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Boone County2 ESE Madrid 31 1919CST2009CST 0 0 0.00K 0.00K Heavy RainThree inches of rain fell in the past 50 minutes.Boone County1 SW Boxholm 31 1922CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Power line reported down in Boxholm.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Decatur CountyLeon 31 2020CST 0 1 0.00K 0.00K LightningA 15 year old girl was struck by lightning.Tama County1 SE Tama 31 2045CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Trees and power lines were down in Tama and Toledo.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Story County2 SW Slater 31 2049CST 0 0 0.00K 0.00K Heavy RainRainfall storm total so far was 3.85 inches.131

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, CentralA cold front moved into the state from the northwest during the day on the 31st. The airmass became unstable in front of itwith a considerable push of deep moisture. Precipitable water values increased to 2 to 2.4 inches by afternoon. CAPEincreased to 2500 to 4000 J/kg as afternoon temperatures climbed into the mid to upper 80s, with dewpoint readings in the lowto middle 70s. The lifted index fell to -5 to -7 C. The atmosphere was not strongly sheared with 25 to 35 kts of effective shearavailable. CAPE in the -10 to -30 C layer of the atmosphere was between 600 and 800 J/kg. Downdraft CAPE was in the 1000-1400 J/kg range. A squall line developed ahead of the cold front and became marginally severe. Many of the storms producedsmall hail and gusty winds. A few locations reported winds in excess of 60 MPH, with the the highest winds reported of 64MPH in Carroll County in Templeton. High winds from thunderstorms moving into Winnebago County downed trees in a citypark in Buffalo Center. Winds estimated near 80 MPH snapped the top off of a power pole in Buffalo Center and also causedconsiderable tree damage and out building damage in the area. Heavy rainfall was an issue with the storms given the highprecipitable water values. Three inches of rain fell in 50 minutes southeast of Madrid in Boone County, with reports of around4 inches for storm total in the Ames area. In Emmet County, 2.65 inches of rain fell in a little over an hour in Ringsted.Fortunately, it has been quite dry for the previous 10 days. The rains did not cause flash flooding, but did result in some urbanflooding. A 15 year old girl was struck by lightning in Leon as the thunderstorms passed. She was walking across a parking lotand lightning struck just as she reached for the door handle of her car. She was taken to hospital and remained overnight,however there were no detectable injuries beyond memory loss of the event.IOWA, East Central and SoutheastWashington County7 WNW Wellman2 N Kalona03 0030CST1100CST 0 0 1.00M 0.00K Flash FloodHeavy rains resulted in flash flooding in and around Wellman, IA during the morning of August 3. Major flooding wasobserved on Smith Creek on the south edge of town. County Road W 38 had to be closed due to the flood waters. Much of thetown, including the fire station and water treatment plant, was under water. Some residences had 8 to 10 feet of water in theirbasements. Some water rescues were performed. The flood water was still about a foot deep in parts of town, especially nearthe fire station, during the late morning hours.Iowa County4 NE Koszta3 NNE West Amana03 0100CST0600CST 0 0 100.00K 0.00K Flash FloodHeavy rains resulted in flash flooding of parts of North English and surrounding areas during the early morning hours ofAugust 3. A bridge in North English had water flowing over it. In addition, the first floor of an apartment building flooded.Just east of town, Highway F67 was closed due to water across the road. In addition, several county roads had rock washedaway and were in need of repair, including the 411 bridge on M Avenue north of Marengo and the squirrel bridge near NorthEnglish.Keokuk County2 E Kinross 03 0100CST 0 0 100.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph partially ripped the roof off of a hog confinement building, damaged a grain bin, andsnapped several trees along Highway 22 just east of Kinross, IA around 2 am CDT August 3.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Jefferson County1 ENE Fairfield 03 0240CST 0 0 100.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew a tree down onto a house on W Washington Avenue in Fairfield, IA around 340 amCDT August 3.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Jefferson County1 NE Fairfield 03 0240CST 0 0 1.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew a tree down near the intersection of W Hempstead Avenue and N 4th Street inFairfield, IA around 340 am CDT August 3. The tree landed on a shed.An area of showers and thunderstorms developed over portions of western and central Iowa during the evening of August 2 andmoved into eastern Iowa and northwestern Illinois during the early morning of August 3. The showers and storms broughtflooding rains of 1 to 5 inches to areas between Interstate 80 and Highway 34. This resulted in flash flooding of parts of Iowaand Washington Counties. Some of the thunderstorms were severe damaging a farmstead near Kinross, Iowa and downing atree in Fairfield, Iowa. Low temperatures across the area the morning of August 3 were in the upper 60s and lower 70s. Note:The estimated wind gust of 61 knots is equivalent to 70 mph.132

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, East Central and SoutheastWashington County7 WNW Wellman6 ENE Riverside03061000CST1200CST 0 0 500.00K 0.00K FloodHeavy rains during the first week of August resulted in the English River at Kalona going above the moderate flood stage levelof 16 feet on August 3 around 11 am CDT. It crested over the major flood stage level around 18.1 feet around 7 pm CDTAugust 3. It fell below the moderate flood stage level around 1 pm CDT August 6.Keokuk County2 SSW Coal Creek3 NNE Keota04070000CST1400CST 0 0 250.00K 0.00K FloodHeavy rains during the first week of August resulted in the Skunk River at Sigourney going above the moderate flood stagelevel of 18 feet on August 4 around 1 am CDT. It crested around 20.8 feet around 1 am CDT August 6. It fell below themoderate flood stage level around 3 pm CDT August 7.Scott County2 NW Davenport 04 0250CST 0 0 100.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew a large tree limb down and an entire tree onto a house and car along 36th Street westof Division Street in Davenport, IA around 350 am CDT August 4.Johnson County7 WSW Oxford3 ESE Iowa City Muni ArptNote: The estimated wind gust of 61 knots is equivalent to 70 mph.04 0300CST0800CST 0 0 0.00K 0.00K Flash FloodHeavy rains resulted in flash flooding along Old Mans Creek just southwest of Iowa City, IA during the morning of August 4.At 712 am CDT, the Corps of Engineers stream gage on Old Mans Creek indicated that it was over a foot above the flood stageat that time.Scott County1 S Eldridge 04 0300CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph blew down several tree branches throughout Eldridge, IA around 4 am CDT August 4.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Scott County3 SSW Princeton 04 0300CST 0 0 10.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew down a tree along 277th Avenue just north of Territorial Road on the north side of LeClaire, IA around 4 am CDT August 4. The tree fell onto some power lines snapping them.Johnson County3 W Hills 0407An area of showers and thunderstorms developed over western Iowa the evening of August 3 and pushed across the midMississippi Valley during the early morning hours of August 4. These storms brought damaging winds to portions of ScottCounty and more rain to areas bounded by Highway 30 and the Iowa and Missouri border. Flash flooding of a creek wasobserved near Iowa City. Low temperatures across the area the morning of August 4 ranged in the lower and middle 70s.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.1300CST0000CST 0 0 75.00K 0.00K FloodLouisa County15 NNW Gladwin 0407Washington County5 N Riverside 04071300CST0000CST 0 0 100.00K 0.00K Flood1300CST0000CST 0 0 75.00K 0.00K FloodHeavy rains during the first week of August resulted in the Iowa River at Lone Tree going above the moderate flood stage levelof 16.5 feet on August 4 around 2 pm CDT. It crested around 17.6 feet around 7 am CDT August 5. It fell below the moderateflood stage level around 1 am CDT August 7.133

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, East Central and SoutheastBenton County3 SE Keystone 08 2241CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)A 59 mph wind gust was measured about 3 miles southeast of Keystone, IA at 1141 pm CDT August 8.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Dubuque CountyLuxemburg 09 0000CST 0 0 250.00K 0.00K LightningA lightning strike was the likely cause of an early morning fire August 9 that caused significant damage to the Holy TrinityCatholic Church in Luxemburg, IA. Authorities were notified at 236 am CDT that flames were coming out of the churchsteeple.Jones County3 ENE Monticello Muni Arpt 09 0000CST 0 0 50.00K 0.00K Thunderstorm Wind (61EG)Lee County7 WNW Croton 0915Wind gusts estimated to be 70 mph ripped the roofs off of some outbuildings and blew the doors off of a shed about 4 mileseast northeast of Monticello, IA around 1 am CDT August 9. Some of the debris was lofted into the tops of some trees.A large complex of showers and thunderstorms plowed eastward across Iowa, northern Illinois, and southern Wisconsin duringthe late evening and overnight hours of August 8th and 9th. High winds and torrential rains were common with the strongerstorms. Warm and muggy conditions continued across the area with lows in the upper 60s to upper 70s. Note: The estimatedwind gust of 61 knots is equivalent to 70 mph.2030CST1650CST 0 0 250.00K 0.00K FloodHeavy rains during the second week of August resulted in the Des Moines River at St. Francisville going above the moderateflood stage level of 22 feet on August 9 around 930 pm CDT. It crested above the major flood stage level around 26.3 feetaround 1 pm CDT August 12. It fell below the moderate flood stage level around 550 pm CDT August 15.Van Buren County6 NNW Selma4 NNE Farmington09142040CST1345CST 0 0 500.00K 0.00K FloodHeavy rains during the second week of August resulted in the Des Moines River at Keosauqua going above the moderate floodstage level of 25 feet on August 9 around 940 pm CDT. It crested above the major flood stage level around 28.3 feet around 7am CDT August 12. It fell below the moderate flood stage level around 245 pm CDT August 14.Washington County7 WNW Wellman3 NW RiversideKeokuk County2 SSW Coal Creek3 NNE Keota10 0300CST0700CST 0 0 100.00K 0.00K Flash FloodHeavy rains resulted in flash flooding of several streets in Washington, IA during the morning of August 10. Some cars werestalled out in the flood waters. In addition, several county roads were closed due to the flood waters. Many of the gravel roadswere damaged or washed out.Another round of heavy rain-producing showers and thunderstorms developed and moved across eastern Iowa and northernIllinois during the morning of August 10. The heaviest rainfall amounts of 2.50 to 3.50 inches were centered aroundWashington, IA and Kewanee, Illinois, where flash flooding was observed. Low temperatures across the area were mainly inthe lower and middle 70s.10160500CST2140CST 0 0 500.00K 0.00K FloodHeavy rains during the second week of August resulted in the Skunk River at Sigourney going above the moderate flood stagelevel of 18 feet on August 10 around 6 am CDT. It crested above the major flood stage level around 23.6 feet around 1 am CDTAugust 12. It fell below the moderate flood stage level around 1040 pm CDT August 17.Lee County4 NNE Viele4 E Ft Madison Muni Arpt10 1730CST2030CST 0 0 250.00K 0.00K Flash Flood134

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, East Central and SoutheastHeavy rains resulted in flash flooding of Fort Madison, IA during the evening of August 10. Flood waters 1 foot deep wereobserved flowing across 14th Street. Some streets had flood waters 2 to 3 feet deep. The North Lee Historical Society buildingflooded and its parking lot had about 2 feet of water covering it, with the water up to the tail lights of cars.Des Moines County1 WSW Burlington 10 1745CST 0 0 100.00K 0.00K LightningLightning struck a tower on the north side on top of the Burlington Police Department building around 645 pm CDT August 10.The strike affected the communications center's dispatching capabilities, phone systems, radio-assisted dispatch, computersystems, and some computers. The Burlington Police Department also contributed to this report.Showers and thunderstorms brought torrential rains of 2 to 3 inches to areas along and east of a line extending from northeastMissouri, to Fort Madison, Iowa, to Roseville, Illinois during the evening of August 10. In addition, a lightning strike causeddamage at the Burlington Police Department. Otherwise, hot and humid conditions prevailed with highs in the upper 80s toupper 90s.Iowa County6 WNW Koszta4 NE East Amana11181400CST2250CST 0 0 250.00K 0.00K FloodHeavy rains during the second week of August resulted in the Iowa River at Marengo going above the moderate flood stagelevel of 15.5 feet on August 11th around 3 pm CDT. It crested around 15.8 feet around 7 pm CDT August 12. After fallingbelow 15.5 feet for about 40 hours, it rose back above it and had a secondary crest around 16.4 feet around 1 am CDT August18. It fell below the moderate flood stage level around 1150 pm CDT August 18.Delaware County1 N Manchester 13 0400CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 60 mph blew down a large tree in front of the West Delaware Lambert School building inManchester, IA during the early morning of August 13.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Benton County2 NE Keystone 13 1206CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew a large tree down across a road about 2 miles northeast of Keystone, IA around 106pm CDT August 13.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Benton County4 SE Garrison 13 1225CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph were observed about 5 miles southwest of Vinton, IA at 125 pm CDT August 13.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Benton County1 N Shellsburg 13 1245CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph were observed about 2 miles north of Shellsburg, IA at 145 pm CDT August 13.A cluster of thunderstorms developed and moved eastward across Delaware County during the early morning hours of August13. One storm was severe downing a tree in Manchester, IA.During the afternoon and evening, an area of showers and thunderstorms ahead of a cold front over central Iowa movedeastward into eastern Iowa and northern Missouri. Damaging winds, flooding rains, and lightning accompanied the strongerstorms. High temperatures August 13 were mainly in the upper 80s to middle 90s. Heat index readings ranged from 100 to 110degrees. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Des Moines County6 WSW Danville Wilson Arpt 13241300CST0820CST 0 0 250.00K 0.00K Flood135

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, East Central and SoutheastHenry County12 NW Coppock3 NNE Mt Union13241300CST0820CST 0 0 500.00K 0.00K FloodJefferson County11 NNW Pleasant Plain19 ESE Cappock13241300CST0820CST 0 0 250.00K 0.00K FloodLee County5 ENE St Paul6 N Denmark13241300CST0820CST 0 0 250.00K 0.00K FloodWashington County6 N Rubio12 SE Crawfordsville13241300CST0820CST 0 0 250.00K 0.00K FloodHeavy rains during the second week of August resulted in the Skunk River at Augusta going above the moderate flood stagelevel of 17 feet on August 13 around 2 pm CDT. It crested above the major flood stage level around 23.3 feet around 1 pmCDT August 16. It fell below the moderate flood stage level around 920 am CDT August 24.Buchanan County3 N Winthrop4 ESE Monti13 1310CST1600CST 0 0 0.00K 0.00K Flash FloodHeavy rains resulted in some flash flooding of several intersections along County Road W45 along Buffalo Creek fromWintrop, IA to Monti, IA during the afternoon of August 13.Buchanan County2 NNE Monti 13 1315CST 0 0 50.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew a tree down onto a house about 5 miles southwest of Masonville, IA at 215 pm CDTAugust 13.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Delaware County6 NW Manchester 13 1330CST1700CST 0 0 5.00K 0.00K Flash FloodHeavy rains resulted in flash flooding of a gravel road near Manchester, IA during the afternoon and evening of August 13.Johnson County1 ESE North Liberty 13 1330CST 0 0 10.00K 0.00K LightningLightning struck a civil defense siren in North Liberty, IA during the afternoon of August 13. The strike caused the siren tomalfunction and activate.Jones County1 S Center Jct 13 1350CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew down a large tree near Highway 38 about a half a mile south of County Road E29 nearCenter Junction, IA around 250 pm CDT August 13.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Lee CountyKeokuk 13 1600CST1800CST 0 0 25.00K 0.00K Flash FloodHeavy rains resulted in flash flooding of the intersection of 10th Street and Main Street in Keokuk, IA during the late afternoonand evening of August 13. The intersection was closed due to the flooding.136

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, East Central and SoutheastJefferson County2 NW Fairfield3 W Beckwith13142100CST0100CST 0 0 100.00K 0.00K Flash FloodHeavy rains resulted in some flash flooding of parts of Fairfield, IA during the late evening of August 13 and early morning ofAugust 14. The flood water was 1 foot deep across 22nd Street and on W Grimes Avenue.Washington County1 E Washington 13 2100CST 0 0 50.00K 0.00K LightningLightning struck an apartment building at 311 E Main Street in Washington, IA during the evening of August 13 resulting in afire. Fire-fighting crews were dispatched at 1004 pm CDT.Jackson County1 S Spragueville1 W Preston13142219CST0300CST 0 0 0.00K 0.00K Flash FloodHeavy rains resulted in flash flooding of Deep Creek just west of Preston, IA during the late night of August 13 and earlymorning of August 14. The creek flowed across 17th Street at the bridge crossing. The water was 6 inches deep.Henry County3 WNW Wayland 13142221CST0100CST 0 0 0.00K 0.00K Flash FloodHeavy rains resulted in the flash flooding of some streets in Coppock, IA during the late evening of August 13 and earlymorning of August 14.A cluster of thunderstorms developed and moved eastward across Delaware County during the early morning hours of August13. One storm was severe downing a tree in Manchester, IA.During the afternoon and evening, an area of showers and thunderstorms ahead of a cold front over central Iowa movedeastward into eastern Iowa and northern Missouri. Damaging winds, flooding rains, and lightning accompanied the strongerstorms. High temperatures August 13 were mainly in the upper 80s to middle 90s. Heat index readings ranged from 100 to 110degrees.Clinton County4 NNW Toronto4 E Folletts14161800CST1200CST 0 0 125.00K 0.00K FloodScott County15 NNW Dixon5 ESE Mc Causland14161800CST1200CST 0 0 125.00K 0.00K FloodHeavy rains during the second week of August resulted in the Wapsipinicon River at De Witt reaching the moderate flood stagelevel of 11.5 feet on August 14 around 7 pm CDT. It remained steady around 11.5 feet for about 42 hours. It fell below themoderate flood stage level around 1 pm CDT August 16.Johnson County1 NE Tiffin 20 1410CST 0 1 1.00K 0.00K LightningLightning struck a home at 283 Woodfield Drive in Tiffin, IA around 310 pm CDT August 20. A teenage male was shockedwhile using a laptop computer at the time of the lightning strike. The residence sustained minor damage.Keokuk County1 W Thornburg2 NNW Webster20 1542CST2000CST 0 0 0.00K 0.00K Flash FloodHeavy rains resulted in flash flooding of area creeks east of What Cheer, IA during the afternoon of August 20.137

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, East Central and SoutheastVan Buren County3 ESE Mt Sterling 20 1607CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph blew down some tree limbs about 3 miles north northeast of Charlie Heath MemorialConservation Area or about 3 miles east southeast of Mount Sterling, IA at 507 pm CDT August 20.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Van Buren County1 SW Farmington 20 1615CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 50 to 60 mph were observed about 5 miles northwest of Croton, IA at 515 pm CDT August 20.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lee County1 W Ft Madison 20 1630CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew some trees and utility poles down about 1 mile east northeast of Fort Madison, IAaround 530 pm CDT August 20.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Lee County1 WNW Keokuk 20 1635CST 0 0 10.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew down some trees in Keokuk, IA around 535 pm CDT August 20. One of the trees fellonto some power lines. Power was knocked out to hundreds of customers. In addition, a tent sheltering food vendors at theRolling on the River blues festival on the Keokuk riverfront was destroyed.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Lee County2 WSW Ft Madison 20 1635CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Wind gusts estimated to be 65 mph blew some tree limbs and power lines down throughout Fort Madison, IA at 535 pm CDTAugust 20.Showers and thunderstorms moved across the area August 20 as a trough of low pressure moved into western Iowa. Some ofthe storms were severe downing trees and power lines. Torrential downpours and lightning also accompanied the storms withrainfall totals of 1 to 2 inches in just an hour or two. Otherwise, warm and humid conditions prevailed across the region withhigh temperatures topping out in the middle 80s to lower 90s. Note: The estimated wind gust of 56 knots is equivalent to 64mph.Lee County7 WNW Croton 21 0720CST1515CST 0 0 125.00K 0.00K FloodHeavy rains during the third week of August resulted in the Des Moines River at St. Francisville going above the moderateflood stage level of 22 feet on August 21 around 820 am CDT. It crested around 22.24 feet around 12 pm CDT August 21. Itfell below the moderate flood stage level around 415 pm CDT August 21.Benton County1 NE Mt Auburn 31 2109CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph were observed in Mount Auburn, IA at 1009 pm August 31.A complex of showers and thunderstorms moved across the area during the evening of August 31 bringing some strong windsand heavy rains to the region. One storm near Mount Auburn, IA was severe producing winds over 58 mph. Widespreadrainfall totals of 1 to 3 inches were observed. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.138

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, NortheastChickasaw County3 NNE Ionia 08 2215CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)The road weather information system along U.S. Highway 18 near New Hampton recorded a wind gust of 59 mph.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Fayette County4 NW Arlington 08 2256CST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)Thunderstorm winds blew down an outbuilding northwest of Arlington along G Avenue.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Winneshiek CountyDecorah 08 2302CST 0 0 0.25K 0.00K Thunderstorm Wind (50EG)Trees were blown down in parts of Decorah.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Allamakee CountyWaukon 08 2316CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down in the city of Waukon.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clayton County1 S Guttenberg Arpt 08 2338CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees and power lines were blown down, causing a power outage. The outage affected Able and Essman Islands justnorth of the city of Guttenberg.A line of thunderstorms developed in western Iowa ahead of a trough of low pressure in the Central Plains on the afternoon ofAugust 8th. Favorable conditions for severe thunderstorms extended east into southern Wisconsin, which allowed thethunderstorms to propagate through northeast Iowa. Strong winds were observed as these storms passed, which caused variousamounts of damage across the area. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.IAZ018Floyd12 1445CST1515CST 0 0 0.00K 0.00K HeatThe combination of very warm temperatures and high dew points led to extreme apparent temperature values across northeastIowa on the 12th. This caused the automated weather observing equipment at Charles City (Floyd County) to record amaximum apparent temperature of 105 degrees.IOWA, NorthwestLyon County3 NW Granite5 WNW Larchwood01030000CST0600CST 0 0 0.00K 0.00K FloodMinor to moderate flooding along the Big Sioux River from late July heavy rains continued at the start of August beforequickly abating. Some fields and roads along the river were flooded.Plymouth County6 N Akron 01070000CST1800CST 0 0 0.00K 0.00K FloodMinor to moderate flooding along the Big Sioux River from late July heavy rains continued at the start of August beforequickly abating. Farmland and some roads along the river were flooded. The peak level at Akron was 4.54 feet above floodstage on August 1st.Sioux County7 WNW Rock Vly 01030000CST1800CST 0 0 0.00K 0.00K FloodMinor to moderate flooding along the Big Sioux River from late July heavy rains continued at the start of August beforequickly abating. Farmland and some roads along the river were flooded. The peak level at Hawarden was 5 feet above floodstage on August 1st.139

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, NorthwestFlooding along the Big Sioux River continued in early August from heavy rains at the end of July, but the flooding endedduring the first half of the month.Cherokee County10 ENE Larrabee1 E Quimby01020000CST1800CST 0 0 0.00K 0.00K FloodMinor to moderate flooding along the Little Sioux River continued as August began, but abated by late on August 2nd.Flooding affected mainly agricultural land along the river.Flooding of the Little Sioux River from July heavy rains was rapidly decreasing as August began, but significant flooding alongthe river lingered in Cherokee County until the second day of the month.Clay County3 NNW Peterson 07 0428CST0730CST 0 0 0.00K 0.00K Flash FloodBuena Vista CountyLinn Grove 0817Woodbury County1 W Springdale1 SSW Sioux CityHeavy rainfall of up to 3 inches in a short time caused flash flooding of streets and a few creeks in and near Peterson.Thunderstorms caused heavy rain which produced flash flooding in and hext to the town of Peterson on the early morning ofAugust 7th.0600CST1800CST 0 0 0.00K 0.00K FloodHeavy rain caused minor to moderate flooding along the Little Sioux River, with farmland and some other lowlands flooded.The river crested at 1.82 feet above flood stage at Linn Grove on August 14th.Heavy rain caused flooding along the Little Sioux and Ocheyedan Rivers during the middle part of August. the flooding wasmostly minor to moderate, but a record high stage was recorded on the Ocheyedan River at Spencer.08 1800CST 0 0 50.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds caused widespread tree damage, including several large trees and numerous branches blown down. Someof the tree debris blocked roads and caused minor damage to homes. The winds also blew down power lines, causing a poweroutage, and blew part of a freight train off its tracks.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Woodbury County3 S Salix 08 1809CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Woodbury County1 S Moville 08 1815CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including large branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Woodbury County1 W Sioux City 08 1822CST 0 0 0.00K 0.00K Thunderstorm Wind (57MG)Note: The measured wind gust of 57 knots is equivalent to 66 mph.Ida County3 N Holstein 08 1840CST 0 0 100.00K Thunderstorm Wind (65EG)Thunderstorm winds destroyed a machine shed, heavily damaged a large shed at a manufacturing plant, overturned a livestocktrailer and a large grain wagon, destroyed a small garage, destroyed or damaged several small sheds, and caused tree damage,including several large trees blown down. A house was damaged by debris from the destroyed machine shed, while otherbuildings and vehicles sustained damage from falling trees and tree debris. The winds also caused an unknown amount ofdamage to corn crops.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.140

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, NorthwestIda County3 N Galva 08 1847CST 0 0 10.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds blew the roof off a barn, blew down power lines, and caused tree damage.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Ida County1 S Ida Grove 08 1850CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including numerous branches blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Buena Vista County3 ESE Storm Lake Arpt 08 1920CST 0 1 25.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds blew over a large semi truck, blocking the road and causing minor injuries to the driver.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Buena Vista County2 E Hanover 08 1920CST 0 0 10.00K 0.00K Thunderstorm Wind (61EG)Buena Vista County1 N Storm Lake1 W LakesideThunderstorm winds caused widespread tree damage, including numerous large branches blown down. The winds also bent aflag pole.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.08 1925CST 0 0 500.00K 0.00K Thunderstorm Wind (65EG)Thunderstorm winds blew the roof off a manufacturing plant, damaged docks and boats along the lake, caused widespread treedamage including numerous large trees blown down, blew down power lines and poles, resulting in power outages, damaged ordestroyed several small sheds, blew down several awnings on businesses, snapped a 4 inch by 4 inch street sign pole, and blewshingles off roofs. Numerous vehicles, homes, and businesses sustained minor damage directly from the wind, while othervehicles and homes were damaged by falling trees and tree debris, some heavily.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Clay CountySpencer 08 1940CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Clay County1 W Webb 08 1940CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several large branches blown down.Thunderstorms produced damaging winds in much of northwest Iowa, excluding the far northwestern corner of the state, duringthe early evening of August 8th. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Plymouth County3 SSE Remsen 09 0600CST 0 0 15.00K 0.00K LightningLightning triggered a house fire that caused minor fire damage but extensive smoke damage to the house and its contents.Lightning caused a fire in a rural home near the town of Remsen on the morning of August 9th.O'brien County2 SW Hartley Muni Arpt3 NW Hartley10 0600CST0830CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding of numerous roads and low areas.Thunderstorms produced heavy rain which caused flash flooding in O'Brien and Dickinson Counties in northwest Iowa duringthe morning and early afternoon of August 10th. The thunderstorms also produced damaging winds in Dickinson County.141

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, NorthwestPlymouth County6 NE Seney2 NW Struble10130600CST1800CST 0 0 0.00K 0.00K FloodHeavy rain caused moderate to major flooding of farmland, other lowlands, and some roads along the Floyd and West BranchFloyd Rivers, flooding farmland, other lowlands, and some roads. The river both rose and fell rapidly between August 10th andAugust 13th.Sioux County2 W Hospers 10130600CST1800CST 0 0 0.00K 0.00K FloodHeavy rain caused moderate to major flooding on the Floyd and West Branch Floyd Rivers, flooding farmland, other lowlands,and some roads. The river both rose and fell rapidly, cresting at 5.84 feet above flood stage at Alton on August 12th.After water levels on the Floyd River rapidly dropped by the start of August, an episode of heavy rain again caused moderate tomajor flooding along the Floyd and West Branch Floyd Rivers from August 10th to August 13th.Clay CountyEverly1 N Spencer10140600CST1800CST 0 0 0.00K 0.00K FloodHeavy rain caused record flooding along the Ocheyedan River, with farmland, other lowlands, and a few roads flooded. Theriver crested at a record 3.70 feet above flood stage near Spencer on August 11th.Heavy rain caused flooding along the Little Sioux and Ocheyedan Rivers during the middle part of August. the flooding wasmostly minor to moderate, but a record high stage was recorded on the Ocheyedan River at Spencer.Dickinson County1 S Lake Park 10 1250CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including several branches blown down. The winds were accompanied by small hail.Dickinson County2 SW Spirit Lake Lake1 S OrleansNote: The estimated wind gust of 56 knots is equivalent to 64 mph.10 1320CST1400CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding of a few roads, resulting in at least one vehicle stalling.Thunderstorms produced heavy rain which caused flash flooding in O'Brien and Dickinson Counties in northwest Iowa duringthe morning and early afternoon of August 10th. The thunderstorms also produced damaging winds in Dickinson County.Cherokee County10 ENE Larrabee1 E Quimby11160600CST1800CST 0 0 0.00K 0.00K FloodHeavy rain caused minor to moderate flooding along the Little Sioux River, with farmland and some other lowlands flooded.The river crested at 2.30 feet above flood stage at Cherokee on August 12th.Clay County10 W Fostoria 11190600CST1800CST 0 0 0.00K 0.00K FloodHeavy rain caused moderate flooding along the Little Sioux River, with farmland, other lowlands, and a few roads flooded. Theriver crested at 4.28 feet above flood stage at Spencer on August 12th.Heavy rain caused flooding along the Little Sioux and Ocheyedan Rivers during the middle part of August. the flooding wasmostly minor to moderate, but a record high stage was recorded on the Ocheyedan River at Spencer.142

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, SouthwestFremont County5 SSW Payne6 W Percival01180000CST1730CST 0 0 3.00K 0.00K FloodThis flooding carried over from June and July when heavy rain over much of eastern Nebraska and western Iowa during thosemonths caused a prolonged period of flooding along the Missouri River, especially downstream of Omaha through Rulo. Theriver near Nebraska City climbed above flood stage early in the afternoon on June 11th and remained above flood stage formost of July and into August. River levels were held up by additional rains and increased releases from upstream reservoirs.The river at Nebraska City crested around or a little over 25 feet during the afternoon of June 16th and June 21st. During Julythe river at Nebraska City peaked around 22 feet during the evening of July 1 and in August a crest of around 21.5 feet wasseen on the 5th. Flood stage is 18 feet. In western Iowa most of the flooding was confined to farmland along the river withmost of the significant flooding occurring during June and July.Mills County6 NW Folsom8 SSW Pacific Jct01180000CST1730CST 0 0 3.00K 0.00K FloodThis flooding carried over from June and July when heavy rain over much of eastern Nebraska and western Iowa during thosemonths caused a prolonged period of flooding along the Missouri River downstream of Omaha through Rulo. In Plattsmouththe Missouri River crested a little over 33 feet in the late afternoon of June 22nd, flood stage is 26 feet. During July the rivercrested close to 29.5 feet in the afternoon of July 1 and a crest of around 29 feet was observed during the first week of August.The river climbed above flood stage in the afternoon of June 11 and remained close to or above flood stage most of July intoAugust. Several mobile home and camping communities along the river were flooded, including some trailers and mobilehomes. Roads near the river were also flooded, although the more significant flooding was seen in June and July.Pottawattamie County6 WNW Grable 01 0000CST 0 0 1.00K 0.00K Flood17Lowland flooding from heavy rain over much of eastern Nebraska and western Iowa during most of June carried over throughmuch of July into August along the Missouri River in the Omaha area. The high waters occasionally flooded Wilson IslandPark and also crossed a few roads by the river. Rising water also periodically flooded a riverboat casino's parking lot and lowerlevel of the parking garage. Although the river never reached official flood stage in Omaha it periodically rose toward it.Heavy rain in June and July combined with increased releases from upstream reservoirs caused prolonged flooding along theMissouri River from around Omaha downstream through Rulo. The flooding started in June and continued into August.IAZ079-090>091Fremont - Mills - Montgomery - Page02 1300CST1900CST 0 0 0.00K 0.00K HeatTemperatures reached the lower to mid 90s during the afternoon and early evening of August 2nd across southwest Iowa.When combined with dew point temperatures in the upper 70s to lower 80s, heat index values climbed into the 105 to 115degree range for several hours.Pottawattamie County1 N Underwood 03 2041CST 0 0 0.00K 0.00K Hail (1.75)Mills County1 ESE Hastings 03 2144CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A spotter estimated a thunderstorm wind gust of 60 mph.Thunderstorms developed across eastern Nebraska and southwest Iowa during the evening of Aug. 3rd north of a weakstationary front. One storm that tracked across the southern part of Omaha and northern Sarpy county dropped very largehailstones, some as large as baseballs. Although the reported hail size in western Iowa was smaller, some as large as golf ballsfell near Underwood from that storm. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.IAZ055-069-079>080-090>091Fremont - Harrison - Mills - Montgomery - Page - Pottawattamie - Shelby08121200CST2000CST 0 0 0.00K 0.00K Excessive Heat143

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, SouthwestIAZ043Monona08 1300CST1800CST 0 0 0.00K 0.00K HeatA ridge of high pressure aloft over the plains allowed a prolonged period of hot and very humid conditions to persist acrosseastern Nebraska and southwest Iowa for a large part of the second week of August. Daytime highs over much of the areareached the 90s with dew point temperatures often in the 75 to 80 degree range. This created heat index values that oftenreached around 105 to 110 degrees and sometimes 115 or hotter. The highest heat index values during this period were nearand south of Omaha toward Falls City and then into extreme southwest Iowa where afternoon values often reached 110 orhigher during this stretch.Monona CountyWhiting 08 1945CST 0 0 0.00K Thunderstorm Wind (55EG)Thunderstorm wind gusts estimated at over 60 mph caused considerable tree damage in the Whiting area which damaged a fewbuildings. The winds also broke at least one center pivot in the area.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Harrison County2 N River Sioux 08 2055CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)The coop observed near Little Sioux estimated thunderstorm wind gusts of between 60 and 65 mph.Scattered strong to severe thunderstorms developed on a wind shift boundary over the Nebraska sandhills during the afternoonof August 8th. With temperatures in the 90s and dew point temperatures in the 70s ahead of the thunderstorms, the extremelyunstable conditions allowed the thunderstorms to maintain their intensity as they tracked across northeast Nebraska into westcentral Iowa during the afternoon and evening of August 8th. Note: The estimated wind gust of 56 knots is equivalent to 64mph.Pottawattamie CountyTreynor 10 2205CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts estimated at 60 mph downed or split several large trees in town along with causing other tree damage.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pottawattamie CountyOakland 10 2210CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts estimated at 60 mph downed a few tree limbs in town.A small cluster of thunderstorms developed during the early evening of August 10 southwest of Beatrice on a weak boundarythat mainly proved to be a wind shift. Temperatures and dew point temperatures were in the lower to mid 90s and mid 70srespectively on both sides of the boundary providing extremely unstable conditions. One of the thunderstorms periodicallyproduced damaging winds as it pulsed between severe and non-severe from southeast Nebraska into southwest Iowa. Note:The estimated wind gust of 52 knots is equivalent to 60 mph.IAZ043Monona12 1200CST1900CST 0 0 0.00K 0.00K HeatA ridge of high pressure aloft over the plains allowed a prolonged period of hot and very humid conditions to persist acrosseastern Nebraska and southwest Iowa for a large part of the second week of August. Daytime highs over much of the areareached the 90s with dew point temperatures often in the 75 to 80 degree range. This created heat index values that oftenreached around 105 to 110 degrees and sometimes 115 or hotter. The highest heat index values during this period were nearand south of Omaha toward Falls City and then into extreme southwest Iowa where afternoon values often reached 110 orhigher during this stretch.Fremont County1 N Hamburg 31 1545CST 0 0 0.00K 0.00K Hail (0.75)Page County2 WSW Coin 31 1730CST 0 0 0.00K 0.00K Hail (1.00)The hail was accompanied by torrential rain and wind gusts of 40 to 45 mph.144

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010IOWA, SouthwestAn unstable air mass in southwest Iowa and a moderately strong low level jet helped thunderstorms develop ahead of a coldfront in southwest Iowa. The storms produced at least one report of large hail in southwest Iowa but also produce very heavyrainfall from near Hamburg east to around Coin where radar estimated that 3 to 4 inches of rain fell across parts of that area.KANSAS, EastKSZ026-038>040-054>056-058>059Anderson - Coffey - Douglas - Franklin - Jefferson - Lyon - Osage - Shawnee - Wabaunsee02041300CST1600CST 0 0 0.00K 0.00K Excessive HeatA combination of air temperatures in the upper 90s to low 100s combined with humidity levels produced heat indices of 108 to115 across Northeast Kansas during the period of Tuesday August 3rd to Wednesday August 4th. No fatalities were notedduring this event and no information was available regarding heat related illnesses. The excessive heat came to a brief endwhen thunderstorms moved across the area which cooled air temperatures down briefly but provided no relief from humidity.KSZ010>012-022>024-026-038>040-054>056-058>059Anderson - Brown - Coffey - Douglas - Franklin - Jackson - Jefferson - Lyon - Marshall - Nemaha - Osage- Pottawatomie - Riley - Shawnee - Wabaunsee09121200CST1700CST 0 0 0.00K 0.00K Excessive HeatKSZ008-020>021-034>037Clay - Cloud - Dickinson - Geary - Morris - Ottawa - Republic - Washington10121200CST1700CST 0 0 0.00K 0.00K Excessive HeatA prolonged 3 day period of heat indices in the 106 to 114 degree range occurred across much of Northeast Kansas betweenMonday August 9th and Friday August 13th. An excessive heat watch was issued on Friday August 6th that outlined what wasexpected to occur during the work week. No fatalities were reported and no information regarding the presence or number ofany heat related illnesses were noted during the event. The heat finally ended when a cold front moved through the area laterFriday August 13th into Saturday August 14th.Ottawa County1 S Tescott 10 1520CST1526CST 0 0 0.00K Thunderstorm Wind (61EG)A 6 inch tree limb broke at a residence near Tescott. a 4 foot Cottonwood tree was blown down by the strong winds. Time wasestimated by the spotter.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Washington CountyHanover 10 1809CST 0 0 0.00K 0.00K Hail (1.00)Pottawatomie County4 SE Flush4 E Louisville10 1855CST1916CST 0 0 8.00K 0.00K Thunderstorm Wind (70EG)Strong thunderstorms brought periods of strong winds and heavy rain to portions of Pottawatomie County on the afternoon ofAug 10, 2010. These storms produced strong winds which broke or damaged 6 power poles near a landfill along WheatonRoad near Louisville. The Kansas Department of Transportation reported a roof was torn off a barn-style metal shed locatednear Highway 24 and Onaga Road. Many spotters throughout the area reported 60 to 70 mph winds with this storm.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.145

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, EastWabaunsee County1 SW Alma1 SSW AllendorphA mobile home is damaged near Wamego, KS.10 1942CST1954CST 0 0 0.00K Thunderstorm Wind (52EG)A couple spotters near the community of Alma reported 60 mph wind gusts. Some small tree limbs approximately 1 to 2 incheswide were broken as a result of the winds. One spotter reported that the wind lasted approximately 10 minutes at the residence.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Shawnee County2 NE Silver Lake 10 2000CST2004CST 0 0 0.00K Thunderstorm Wind (52EG)A trained spotter reported a 60 mph wind gust near Silver Lake, which broke some small tree limbs on the property.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Osage County1 WNW Osage City 11 1537CST1545CST 0 0 0.00K Thunderstorm Wind (61EG)Trained spotters in Osage City reported 70 mph wind gusts. Some small tree limbs were also broken across town due to thewind.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Douglas County4 NE Pleasant Grove 11 1609CST1612CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Trained spotters near Lawrence reported 60 mph winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Wabaunsee County1 SW Alta Vista 11 1614CST1617CST 0 0 0.00K Thunderstorm Wind (52EG)A trained spotter reported 60 mph winds. a metal flag pole was pushed over as a result of the wind.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.146

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, EastDouglas County2 WSW Lawrence 11 1629CST1633CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)At 1550 Delaware and 1100 block of E 1500 Road, power lines were down. Scattered power outages were reported acrossLawrence. A power pole was down over N1100 Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Wabaunsee County1 NW Alma 11 1719CST 0 0 0.00K 0.00K Hail (1.00)Coffey CountyLebo 11 1730CST1733CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A law enforcement officer reported 60 mph winds near the City of Lebo., with some small tree limb damage.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Coffey County4 WNW Sharpe 11 1802CST1806CST 0 0 3.00K 0.00K Thunderstorm Wind (65EG)Power lines and poles were down along Highway 75 near Coffey County Airport. Time was estimated with radar.The afternoons of August 10th and 11th 2010 brought many short-lived thunderstorms to portions of northeastern Kansas.These storms were short-lived, however, when they collapsed they produced strong gusts of wind which caused damage tonumerous trees and structures.On Tuesday August 10th, Pottawatomie County Emergency Manager was taking shelter from the storms in one of the thestructures damaged by 70 to 80 mph winds when the roof was blown away. Near Louisville, 6 power poles were damaged orbroken by the strong winds. Aside from the damage in Pottawatomie County, trained spotters throughout the area reported 60to 70 mph winds from these short bursts of wind.On Wednesday August 11th, another round of thunderstorms kicked off in the mid afternoon. More tree and power poledamage was reported in downtown Lawrence. A telephone pole was snapped near the Coffey County Airport and broken treelimbs did vehicle damage in Burlington. Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Pottawatomie County1 S Onaga Arpt 13 0935CST0939CST 0 0 0.00K Thunderstorm Wind (56EG)A roof was blown off a barn near Onaga. Time was estimated from radar.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Brown County2 SW Fairview 13 1120CST1125CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Trained spotters near Fairview reported 60 to 70 mph wind gusts.Dickinson County4 N Talmage5 NE BuckeyeNote: The estimated wind gust of 56 knots is equivalent to 64 mph.13 1431CST1440CST 0 0 1.00K 0.00K Thunderstorm Wind (56EG)Trained spotters from across northern Dickinson county reported 60 to 70 mph wind gusts associated with a strong stormcomplex which moved over that area. near the town of Moonlight a 16 inch fig tree broke at the trunk about 2 feet from theground. Tin from nearby outbuildings was also laying the front yard of the residence.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.147

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, EastGeary County1 E Milford 13 1452CST1507CST 0 0 0.00K Thunderstorm Wind (61EG)Two campers and a pontoon boat were overturned by wind at Milford Lake. Time was estimated by radar.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Geary County5 W Junction City 13 1510CST1518CST 0 0 0.00K Thunderstorm Wind (65EG)At a residence 5 miles west of Junction City a metal outbuilding was destroyed, and debris was found nearly a quarter of a miledownwind. Closer to Junction City, a gas station lost part of its awning. Trees and power lines were reported down acrossJunction City resulting in many damaged roofs and cars and widespread power outages.Riley County1 SE Ogden1 E ManhattanNote: The estimated wind gust of 65 knots is equivalent to 75 mph.13 1510CST1524CST 0 0 400.00K 0.00K Thunderstorm Wind (81MG)A wind measuring instrument mounted to the roof of the Air Traffic Control tower at Manhattan Regional Airport measured a93 mph wind gust. The ASOS station at Manhattan Regional Airport also reported a strong wind gust of 68 mph. In the townof Ogden the windows of a residence were cracked by the force of the wind. No estimation of the wind speed was given by thisresident. Kansas State University also sustained some significant damage, as wind damage to Anderson Hall's roof resulted inover a quarter million dollars in repairs. In and around Manhattan, numerous outbuildings were damaged and destroyed.Widespread power line and tree damage was also noted across the city, resulting in many damaged roofs and widespread poweroutages.Note: The measured wind gust of 81 knots is equivalent to 93 mph.Pottawatomie County1 W Swamp Angel1 E WamegoSouthern Riley County.13 1522CST1542CST 0 0 0.00K Thunderstorm Wind (61EG)Power line and tree damage was reported in the eastern part of Manhattan. A street sign was also blown down in Wamego.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.148

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, EastPottawatomie County.Brown County1 E Robinson 13 1601CST1606CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A trained spotter near Robinson reported a 60 mph wind gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pottawatomie County1 S St Marys 13 1610CST1612CST 0 0 0.00K Thunderstorm Wind (61EG)Law enforcement officers reported power lines down, along with limb and tree damage, near St. Marys.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Wabaunsee County5 E Maple Hill 13 1620CST1625CST 0 0 0.00K 0.00K Thunderstorm Wind (65EG)A trained spotter near Rossville reported an estimated 75 mph wind gust.Shawnee County1 N RossvilleTecumsehNote: The estimated wind gust of 65 knots is equivalent to 75 mph.13 1623CST1650CST 0 0 0.00K Thunderstorm Wind (61EG)Emergency managers and trained spotters reported 70 mph winds across Shawnee county. Tree limbs were up to 3 inches werereported down across the county, and a large tree blew onto a residence, causing significant damage, near the town ofTecumseh.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Geary County1 ESE Brant 13 1627CST1632CST 0 0 2.00K 0.00K Thunderstorm Wind (61EG)A tree 24 inches in the diameter was reported uprooted on the west side of Highway 77 near Geary County Lake. Time of thereport was estimated by radar.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.149

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, EastDickinson County3 S Holland 13 1628CST 0 0 0.00K 0.00K Hail (1.00)Dickinson County4 ENE Holland 13 1638CST 0 0 0.00K 0.00K Hail (1.00)Jackson County1 W Hoyt 13 1651CST1656CST 0 0 0.00K Thunderstorm Wind (61EG)Widespread tree and power line damage was reported near Hoyt.Jefferson County1 E Grantville4 N Buck CreekNote: The estimated wind gust of 61 knots is equivalent to 70 mph.13 1652CST1715CST 0 0 0.00K Thunderstorm Wind (61EG)Emergency managers, law enforcement officers, and trained spotters reported 60 to 70 mph winds across Jefferson County.Large tree limbs were also reported down in Meriden, Grantville, Ozawkie, Alta Vista, Williamstown, and Winchester.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Morris County2 NNW Flint 13 1656CST1701CST 0 0 0.00K Thunderstorm Wind (61EG)Trees were reported blown down near Parkerville.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Geary County12 E Olson 13 1700CST1708CST 0 0 0.00K 0.00K Thunderstorm Wind (58MG)A trained spotter near Dwight reported a 67 mph wind gust.Note: The measured wind gust of 58 knots is equivalent to 67 mph.Dickinson County4 E Holland 13 1702CST1703CST 0 0 0.00K 0.00K Hail (1.25)Dickinson County4 E Holland 13 1702CST1707CST 0 0 0.00K Thunderstorm Wind (56EG)A trained spotter reported 4 to 6 inch tree limbs down near Abilene.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Dickinson County1 E Enterprise 13 1729CST 0 0 0.00K 0.00K Hail (0.75)Dickinson County2 SW Chapman 13 1735CST 0 0 0.00K 0.00K Hail (1.00)Morris County1 WSW Burdick 13 1738CST1743CST 0 0 0.00K Thunderstorm Wind (61EG)A lean to was blown off a barn in Burdick.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.150

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, EastMorris County1 NE Council Grove Res6 NE Council Grove13 1800CST1810CST 0 0 15.00K 0.00K Thunderstorm Wind (70EG)Near Council Grove numerous power lines were blown down. Two large trees, 15 and 18 inches respectively, were uprooted,and a grain bin was caved in.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Morris County1 NW Wilsey 13 1811CST1816CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A law enforcement officer reported a power line down near Wilsey.Osage County1 W Osage City2 ESE VassarNote: The estimated wind gust of 52 knots is equivalent to 60 mph.13 1921CST1943CST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Trained spotters across Osage County reported 65 mph wind gusts.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Tree damage near Osage City.Douglas County2 WSW Lawrence 13 1935CST1940CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Sporadic tree and limb damage was reported throughout the city of Lawrence.Lyon County4 SSE Olpe1 SW HartfordCoffey County3 W Sharpe1 SE BurlingtonNote: The estimated wind gust of 52 knots is equivalent to 60 mph.13 2040CST2055CST 0 0 5.00K 0.00K Thunderstorm Wind (61EG)A law enforcement officer reported power poles down between Olpe and Madison. Also, near Hartford, a truck was blown offthe road and into a ditch.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.13 2105CST2110CST 0 0 0.00K Thunderstorm Wind (61EG)Tree damage, with power poles and power lines down were reported in the New Strawn area. Also a tree fell on top of twovehicles near Burlington.151

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, EastA slow moving cold front moved into an extremely hot and unstable airmass across central and eastern Kansas on Friday,August 13th, and sparked thunderstorms along a line from Salina to Seneca. The airmass feeding into these storms wasextremely unstable, with temperatures in the 100 to 106 degree range and dewpoint temperatures in the 60s and 70s. This ledto rapid storm intensification, with the first severe thunderstorm warning being issued less than 30 minutes after the stormsformed.The Manhattan airport tower measured a wind gust of 93 mph at the peak of the storm, with similar wind speeds in the 70 to 95mph range from southern Manhattan through Ogden and other parts of southern Riley county. The storm complex trackedeastward across southern Pottawatomie, northern Wabaunsee, southern Jackson, northern Shawnee and Jefferson counties.While it weakened a bit as it pushed east, the storms left a swath of wind damage.Additional severe thunderstorms developed along the front to the northeast and southwest of the initial complex, bringingrepeated rounds of damaging winds of 50 to 70 mph, a few reports of hail larger than quarters, and intense cloud to groundlightning. As the event wore on into the evening hours, thunderstorms continued to produce wind damage, with a truck beingblown off the road and power lines down in Lyon county. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Shawnee County3 WSW Lake Shawnee 20 1501CST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail was reported at the intersection of Croco and 29th Street.Shawnee County1 SW Lake Shawnee 20 1504CST 0 0 0.00K 0.00K Hail (0.88)Shawnee County2 SW Lake Shawnee 20 1506CST 0 0 0.00K 0.00K Hail (0.88)Shawnee County3 WSW Lake Shawnee 20 1508CST 0 0 0.00K 0.00K Hail (1.00)Lyon County3 N Admire 20 1700CST 0 0 0.00K 0.00K Hail (1.00)Clay County7 E Oak Hill 20 1709CST 0 0 0.00K 0.00K Hail (1.00)Clay County7 E Oak Hill6 W Wakefield20 1709CST1712CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Public and law enforcement officers reported 60 mph wind gusts near the cities of Oak Hill and Wakefield.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clay County6 WNW Wakefield 20 1710CST 0 0 0.00K 0.00K Hail (1.00)Osage County8 N Burlingame 20 1720CST 0 0 0.00K 0.00K Hail (1.00)Wabaunsee County1 SE Harveyville 20 1725CST 0 0 0.00K 0.00K Hail (0.88)Osage County4 N Burlingame 20 1730CST 0 0 0.00K 0.00K Hail (1.00)Osage County4 WNW Burlingame 20 1735CST 0 0 0.00K 0.00K Hail (1.00)152

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, EastOsage County2 W Burlingame 20 1740CST 0 0 0.00K 0.00K Hail (0.88)Osage County3 N Scranton 20 1751CST 0 0 0.00K 0.00K Hail (0.88)Jefferson County1 E Buck Creek 20 1802CST1807CST 0 0 0.00K Thunderstorm Wind (56EG)A 12 inch cottonwood tree limb broke off in strong winds associated with a thunderstorm complex near Williamstown. A traveltrailer was also knocked off its blocks and turned in the driveway.A seasonably strong upper level trough moved across the Plains on Friday August 14, while an associated cold front made itsway across Kansas. These features combined to spark thunderstorms across northeast Kansas during the afternoon hours. Afew of these storms became severe during the afternoon and evening, with reports of damaging winds and large hail. Thesestorms also brought some much needed rain to the parts of the region, with numerous reports of one to two inches of rain.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Republic County2 SE Norway 31 1719CST 0 0 0.00K 0.00K Hail (0.88)Republic County2 SE Norway 31 1719CST1724CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)KANSAS, Extreme SoutheastA 60 mph wind gust was reported near Norway by the public.On the evening on August 31st, strong thunderstorms produced isolated severe wind. Note: The estimated wind gust of 52knots is equivalent to 60 mph.Crawford County2 ENE Kirkwood 14 2324CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several trees were reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Crawford County1 S Lone Oak 14 2324CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)KANSAS, North CentralA porch on the front of a home was separated from the structure.A thunderstorm complex which developed over Kansas moved over southeast Kansas and the Missouri Ozarks after midnight,producing winds in excess of 60 MPH and wind damage reports. Note: The estimated wind gust of 52 knots is equivalent to 60mph.Osborne County13 S Downs 01 1725CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Branches knocked down by winds estimated at 60 MPH.During the heat of this Sunday afternoon, an isolated cluster of strong to marginally severe thunderstorms developed acrosssouthern portions of Osborne County in North Central Kansas, and slowly drifted east into southern Mitchell County by earlyevening before exiting the area. These storms formed in a very unstable environment featuring mixed-layer CAPE valuesaround 3000 J/kg, and on the eastern edge of an area of steep low level lapse rates. However, deep-layer vertical wind shearwas quite weak, with only around 20 knots of effective shear. While these storms resulted in several reports of 45-50 MPHwinds and some pea to penny size hail, there was one report of estimated 60 MPH winds in far east-central Osborne County,resulting in downed tree branches. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mitchell County10 SSW Beloit 10 1803CST 0 0 0.00K 0.00K Hail (0.75)153

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, North CentralAs a weak surface front settled into North Central Kansas during the late afternoon and early evening hours on this Tuesday, afew clusters of strong thunderstorms flared up, primarily affecting southern Mitchell County. The mesoscale storm environmentwas rather unstable, indicated by mixed-layer CAPE values around 2500 J/kg. However, deep-layer vertical shear was quietweak, under 20 knots, resulting in slow storm motion and mitigating much of a severe weather threat. As a result, there wereonly a few reports of estimated 50 MPH wind gusts, and one report of penny size hail south of Beloit.Osborne CountyOsborne 31 1550CST1555CST 0 0 0.00K 0.00K Hail (0.88)KANSAS, NortheastAs a cold front advanced into North Central Kansas on this late Tuesday afternoon, a narrow, broken corridor of strong stormsflared up along the boundary, primarily affecting Osborne, Jewell and Mitchell Counties. These storms developed in a verymoist and unstable airmass featuring around 3500 J/kg mixed-layer CAPE, along with around 30 knots of deep-layer verticalshear. Parts of North Central Kansas received small hail along with locally heavy rainfall, with one report of nickel size hail inthe community of Osborne.Doniphan County3 ESE Purcell 13 1630CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph. A childrens slide was blown 50 feet, and tree limbs were reporteddown.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Atchison County1 S Atchison 13 1725CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm wind gusts were estimated up to 70 mph.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Atchison County1 S Atchison 13 1725CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph, with tree limbs down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Miami County4 WSW Paola Majeski Arpt 13 2130CST 0 0 50.00K 0.00K Thunderstorm Wind (70EG)Thunderstorm wind gusts were estimated up to 80 mph. Several homes had their roofs blown off.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Johnson County1 W Kenneth 13 2135CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was split in two, with many other tree limbs reported down. Thunderstorm wind gusts were estimated up to 60mph.An upper level disturbance, combined with a cold front, caused severe thunderstorms to develop a bow echo across much ofnortheast Kansas. The damaging winds were observed in the late afternoon and evening hours of August 13, 2010. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.Atchison County1 S Atchison 20 1205CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.An isolated severe thunderstorm produced wind damage on August 20, 2010. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.154

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, NorthwestCheyenne County3 W Bird City 03 0055CST 0 0 0.00K 0.00K Thunderstorm Wind (60MG)Note: The measured wind gust of 60 knots is equivalent to 69 mph.Thomas County1 E Levant 03 0130CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An eight inch diameter live tree branch was blown down.Thunderstorms moved across eastern Colorado during the evening and continued over western Kansas during the overnighthours. Several severe wind gusts were reported with little damage occurring. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Graham County1 E Morland 09 1803CST 0 0 15.00K 0.00K Thunderstorm Wind (65EG)Several trees blown over, roof damage and several trailer homes damaged in town.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Graham County1 S (HLC)Hill City Muni 09 1855CST1907CST 0 0 0.20K 0.00K Thunderstorm Wind (61EG)Winds of 60 to 70 mph were reported by ASOS and a cooperative observer over a ten to fifteen minute period. Gutters wereblown off a house and 3 inch diameter tree limbs were down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Graham County1 S (HLC)Hill City Muni 09 1920CST1925CST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)Note: The measured wind gust of 55 knots is equivalent to 63 mph.Thomas County4 E Halford 09 1947CST 0 0 0.20K 0.00K Thunderstorm Wind (61EG)A rain gutter was blown off the house by thunderstorm winds.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Logan CountyMonument 09 2035CST 0 0 2.00K 0.00K Thunderstorm Wind (65EG)A small portion of the roof of an old church was damaged. Four-inch diameter tree limbs were blown down in town.KANSAS, SoutheastKSZ047-050>051-067>069-072-082>083-091>096-098>100Thunderstorms moved across eastern Colorado and northwest Kansas during the evening, producing wind gusts to 70 mph andquarter size hail. Tree and roof damage was reported in many areas. Note: The estimated wind gust of 65 knots is equivalentto 75 mph.Allen - Barton - Butler - Chautauqua - Cowley - Elk - Ellsworth - Harper - Harvey - Kingman - Labette -McPherson - Montgomery - Neosho - Reno - Rice - Sedgwick - Sumner - Wilson01031200CST1900CST 0 0 HeatThe combination of temperatures around 100 degrees and dewpoints in the low to mid 70s combined to produce oppressiveheat and humidity during the afternoon and early evening hours of August 1st through August 4th. The warm temperaturestopped out at 109 degrees on August 3rd. Heat indices ranged from 105 to 115 degrees, mainly over south-central and southeastKansas, but also over southern portions of central and east-central Kansas. The only relief from the heat was a stout southerlywind.Lincoln County1 N Vesper 01 1858CST 0 0 Hail (1.00)A trained spotter reported mostly dime to quarter sized hail.155

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SoutheastLincoln County3 SW Lincoln 01 1932CST 0 0 Hail (1.75)Lincoln County3 SW Lincoln 01 1932CST 0 0 0.50K Thunderstorm Wind (52EG)A trained spotter reported several small tree limbs down. Also a 12 to 14 inch diameter tree was blown down.A warm and humid airmass led to isolated showers and thunderstorms to develop across Central Kansas during the afternoonand evening hours of August the 1st, 2010. This humid and unstable airmass was located just to the south of a warm frontlocated along the Kansas and Nebraska line. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.KSZ033-049-052-070>072Allen - Chase - Greenwood - Lincoln - Marion - Saline - Woodson02 1200CST1900CST 0 0 HeatThe combination of temperatures around 100 degrees and dewpoints in the low to mid 70s combined to produce oppressiveheat and humidity during the afternoon and early evening hours of August 1st through August 4th. The warm temperaturestopped out at 109 degrees on August 3rd. Heat indices ranged from 105 to 115 degrees, mainly over south-central and southeastKansas, but also over southern portions of central and east-central Kansas. The only relief from the heat was a stout southerlywind.Cowley County2 SSE Arkansas City 04 1640CST 0 0 0.50K Thunderstorm Wind (56EG)A storm spotter reported some small tree limbs down south of Arkansas City.A warm and humid airmass just ahead of a weak cold frontal boundary produced an isolated severe thunderstorm and damagingwind gust, along the Kansas Oklahoma border on the afternoon of August the 4th, 2010. Note: The estimated wind gust of 56knots is equivalent to 64 mph.KSZ032-047>053-067>072-082>083-091>096-098>100Allen - Barton - Butler - Chase - Chautauqua - Cowley - Elk - Ellsworth - Greenwood - Harper - Harvey -Kingman - Labette - Lincoln - Marion - McPherson - Montgomery - Neosho - Reno - Rice - Russell - Saline- Sedgwick - Sumner - Wilson - Woodson08141200CST1900CST 0 0 HeatAn extended period of temperatures of 100 to 109 degrees and dewpoints in the low to mid 70s combined to produceoppressive heat and humidity during the afternoon hours of August 8th through 14th. The warmest day was August 13th whentemperatures topped out at 107 to 109 degrees. Heat indices ranged from 105 to 115 degrees, mainly over south-central andsoutheast Kansas, but also over southern portions of central and east-central Kansas. The only relief from the heat was a stoutsoutherly wind.Sedgwick County2 S Goddard 10 1459CST1505CST 0 0 Thunderstorm Wind (61EG)Law enforcement reported 60 to 70 mph winds.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Sedgwick County1 S Goddard 10 1508CST 0 0 Thunderstorm Wind (52EG)Law enforcement in Goddard reported the winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sedgwick County3 SE Goddard 10 1645CST 0 0 Thunderstorm Wind (61EG)The fire chief estimated the 70 mph winds.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.156

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SoutheastMcpherson CountyInman 10 1656CST 0 0 Thunderstorm Wind (52EG)A trained spotter reported the gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sedgwick County2 W Clearwater 10 1700CST 0 0 9.00K Thunderstorm Wind (61EG)Estimated 70 mph winds lifted the roof off a machine shed, which came down and demolished a childrens play area. Atrampoline was also thrown over three fences. A nearby homestead also had a barn destroyed.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Mcpherson County1 NW Mc Pherson Arpt 10 1715CST 0 0 Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Saline County1 W Assaria 10 1715CST 0 0 4.00K Thunderstorm Wind (61EG)Lincoln County2 WNW Lincoln1 NE BarnardThe public reported 30 to 40 inch diameter trees blown down. Some power outages were reported as well. Some Interstate 135signs were snapped off.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.10 1726CST1729CST 0 0 Thunderstorm Wind (52EG)The emergency manager reported wind gusts of 50 to 60 mph.A weak disturbance moved across South Central Kansas during the afternoon of August 10th, 2010. As this disturbanceencountered a very warm and humid airmass, showers and thunderstorms developed across Central and South Central Kansas.One of the thunderstorms produced some isolated damaging wind gusts to 70 mph. Note: The estimated wind gust of 52 knotsis equivalent to 60 mph.Marion County6 WNW Peabody 11 1812CST 0 0 Thunderstorm Wind (52EG)Nickel size hail was reported with the 60 mph winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Marion County7 E Goessel 11 1815CST 0 0 0.40K Thunderstorm Wind (52EG)A trained spotter reported tree branches blown down, and leaves and walnuts blown out of the trees.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Marion County6 WNW Peabody 11 1828CST 0 0 1.00K Thunderstorm Wind (52EG)An officer reported a tree blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Russell County1 S Russell 12 1818CST 0 0 Thunderstorm Wind (56MG)A trained spotter reported the wind gust.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Russell County1 NE (RSL)Russell Muni Ar 12 1827CST 0 0 Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Russell County1 N Russell 12 1830CST 0 0 12.00K Thunderstorm Wind (70EG)A trained spotter estimated the winds, causing trees and power poles to be blown down.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.157

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SoutheastBarton County4 NNW Stickney 12 1959CST 0 0 Thunderstorm Wind (56EG)A spotter reported his vehicle was nearly blown off the road into a ditch.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Russell County8 E Milberger 12 2017CST 0 0 Thunderstorm Wind (52EG)Mcpherson County1 NW Mc Pherson Arpt1 E Mc PhersonA trained spotter reported the gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.13 1526CST1528CST 0 0 2.50K Thunderstorm Wind (61EG)Trained spotters reported 65 to 70 mph winds. Tree limbs were reported down across the city.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Mcpherson County1 NW Mc Pherson Arpt 13 1530CST 0 0 Thunderstorm Wind (70MG)Note: The measured wind gust of 70 knots is equivalent to 81 mph.Mcpherson County1 E Mc Pherson 13 1540CST 0 0 12.00K Thunderstorm Wind (61EG)Multiple power lines were reported down across town.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Mcpherson County1 WSW Galva 13 1545CST 0 0 Thunderstorm Wind (70EG)Report courtesy of KSAL radio.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Mcpherson County1 NE Mc Pherson 13 1549CST 0 0 Hail (0.88)A trained spotter also reported winds to 70 mph.Mcpherson County1 NE Mc Pherson 13 1549CST1550CST 0 0 Thunderstorm Wind (61EG)A trained spotter estimated the winds. Dime sized hail was also reported.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Mcpherson County2 ENE Mc Pherson 13 1552CST 0 0 Hail (1.00)Along with the hail, 64 mph winds were reported.Mcpherson County2 ENE Mc Pherson 13 1552CST 0 0 14.00K Thunderstorm Wind (56MG)Several power lines were down across town, along with several tree limbs 2 to 5 inches in diameter. One inch hail was alsoreported.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Mcpherson County2 WNW Galva 13 1602CST 0 0 Thunderstorm Wind (52EG)A trained spotter reported the wind gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.158

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SoutheastMcpherson CountyRoxbury 13 1609CST 0 0 Hail (0.88)Mcpherson County1 W Roxbury 13 1645CST1647CST 0 0 10.00K Thunderstorm Wind (61EG)A trained spotter reported 24 inch diameter trees down at the Roxbury Cemetery. Multiple branches of 16 to 18 inches indiameter blocked Smoky Valley Road. Some minor roof damage was reported as well.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Marion County9 NW Durham 13 1645CST 0 0 7.00K Thunderstorm Wind (61EG)Large trees were blown down, blocking the road.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Marion County4 SSE Tampa 13 1647CST 0 0 8.00K Thunderstorm Wind (61EG)A trained spotter reports multiple reports of branches down with limbs up to 12 inches in diameter. A couple of metal buildingsare partially fallen over and a transformer pole was down as well.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Marion County4 WNW Tampa 13 1656CST 0 1 5.00K 0.00K Thunderstorm Wind (61EG)County dispatch reported a shed was destroyed and power lines down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Marion County2 NNE Durham 13 1656CST 0 0 2.00K 0.00K Thunderstorm Wind (61EG)Power lines were reported down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Marion County6 NNW Durham 13 1706CST 0 0 0.50K 0.00K Thunderstorm Wind (61EG)A thirty inch tree was broken off about eight feet above the ground.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Marion County2 ENE Marion Res 13 1810CST1820CST 0 10 40.00K 0.00K Thunderstorm Wind (70EG)Extensive damage occurred at the Cottonwoon Point campground at Marion Lake. Three recreational vehicles were flippedover trapping a family of five and injuring 10 people overall. Most of the injuries were cuts and bruises, but one person had tobe extricated from a camper and flown to a nearby hospital. 5 people that were taken to the hospital were treated and released.Trees were also knocked down with a carport destroyed.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Marion County4 NE Marion 13 1828CST 0 0 10.00K Thunderstorm Wind (61EG)Power poles and power lines were blown down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Marion County3 NE Marion 13 1848CST 0 0 7.50K Thunderstorm Wind (61EG)One fourth of a barns roof was blown off.159

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SoutheastSevere storms developed during the afternoon and early evening hours of August 11th through August 13th. Even with theisolated nature to the convection, the storms that developed produced damaging wind gusts over very small areas, as theoppressive heat that was over the area, made conditions favorable for pulse type convection and microburst type wind events.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Kingman County3 N Zenda 14 1645CST 0 0 Thunderstorm Wind (61EG)A trained spotter estimated 60 to 70 mph winds.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Kingman County4 WNW Cleveland 14 1717CST 0 0 Thunderstorm Wind (56EG)A trained spotter reported the wind gust.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Sedgwick County2 NNE Viola 14 1719CST 0 0 Thunderstorm Wind (52EG)A trained spotter estimates winds over 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Kingman County3 E Zenda 14 1745CST 0 0 Thunderstorm Wind (61EG)A trained spotter estimated the winds to be 65 to 70 mph.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Chautauqua County4 WSW Hale 14 1815CST 0 0 Thunderstorm Wind (56EG)Law enforcement estimated the wind gust.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Harper County2 N Attica 14 1832CST 0 0 6.00K Thunderstorm Wind (52EG)Law enforcement reported several power lines were down, along with some small trees knocked over.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cowley County4 SE Winfield Arpt 14 1932CST 0 0 Thunderstorm Wind (56EG)The emergency manager reported the wind gust.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Sumner County1 ESE Oxford 14 1939CST 0 0 2.00K Thunderstorm Wind (52EG)A trained spotter estimated 50 to 60 mph winds on the county line with some minor sign damage.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cowley CountyWinfield Arpt 14 1950CST 0 0 Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Cowley County1 S Winfield Arpt 14 1953CST 0 0 Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.160

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SoutheastCowley County1 S Winfield Arpt 14 1956CST 0 0 Thunderstorm Wind (56MG)Note: The measured wind gust of 56 knots is equivalent to 64 mph.Cowley County1 S Winfield Arpt 14 1958CST 0 0 Thunderstorm Wind (57MG)Note: The measured wind gust of 57 knots is equivalent to 66 mph.Cowley County1 S Winfield Arpt 14 2003CST 0 0 Thunderstorm Wind (57MG)A quasi stationary boundary and a strong upper level disturbance helped lead to the development of severe thunderstormsacross most of South Central Kansas during the evening hours of August 14th, 2010. Strong differential heating from anoppressively warm airmass lead to the development of multicell and even a few supercell thunderstorms. The severethunderstorms led to numerous damaging wind events across Southern Kansas. Note: The measured wind gust of 57 knots isequivalent to 66 mph.Sumner County2 NW Wellington 17 0600CST1200CST 0 0 15.00K 0.00K FloodRainfall amounts of 2 to 3 inches flooded several streets in Wellington and Belle Plaine and adjacent rural areas during themorning hours on the 17th. Several streets were closed by local law enforcement in Wellington. Additionally, during the earlymorning hours on the 18th two separate one-vehicle accidents occurred, likely due to hydroplaning from standing water on arearoads. Both vehicles entered the ditch and slammed into utility poles. Three minor injuries (indirect) were incurred. TheWellington Daily News and Belle Plaine News contributed to this report.Numerous showers and thunderstorms during the overnight hours on the 16th and early morning hours on the 17th produced 2to 3 inches of rain across portions of Sumner County, closing several roads in the city of Wellington due to high water, and alsocausing a few automobile accidents.KSZ069>072-083-092>096-098>100Allen - Butler - Chautauqua - Cowley - Elk - Greenwood - Labette - Montgomery - Neosho - Sedgwick -Sumner - Wilson - Woodson20 1200CST1800CST 0 0 HeatThe combination of temperatures in the upper 90s and dewpoints in the low to mid 70s combined to produce oppressive heatand humidity during the afternoon hours on the 20th. Heat indices ranged from 105 to 109 degrees, mainly over south-centraland southeast Kansas, but also over southern portions of central and east-central Kansas. The only relief from the heat that daywas a stout southerly wind.Barton County4 NW Galatia 23 2000CST 0 0 Thunderstorm Wind (52EG)Winds of 60 mph were estimated by a trained spotter.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Barton County3 WNW Galatia 23 2002CST 0 0 Thunderstorm Wind (52EG)Winds of 60 mph were estimated by a trained spotter.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Barton County4 NNE Albert 23 2006CST 0 0 Thunderstorm Wind (52EG)Winds of 60 mph were estimated by a trained spotter.A cold front and associated upper level disturbance spread numerous showers and thunderstorms southeast across portions ofmainly central and south-central Kansas, and portions of southeast Kansas generally along and east of the flint hills. Theactivity affected the region from the late evening hours on the 23rd through the early morning hours on the 24th. A handful ofdamaging wind reports were received across central Kansas during the late evening on the 23rd, with the activity transitioningto a heavy rainfall and localized flooding threat thereafter. Widespread rainfall amounts ranged from 1 to 3 inches, with pocketsof 3 to 4 inches. The flooding was deemed relatively minor and localized, so specifics were not included in this report. Note:The estimated wind gust of 52 knots is equivalent to 60 mph.161

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SoutheastReno County1 SSW Hutchinson 24 0400CST1100CST 0 0 5.00K 0.00K Heavy RainHeavy rainfall of 2 to 3 inches during the predawn hours on the 24th resulted in flooding at Faris Elementary School inHutchinson. The school was closed on the 24th after plugged drains in the school courtyard allowed the heavy rain toaccumulate and eventually penetrate the gymnasium, cafeteria, two corridors and six classrooms. Damage was relativelyminimal, confined mainly to wet carpet. The Hutchinson News contributed to this report.Numerous showers and thunderstorms during the overnight hours on the 23rd and predawn hours on the 24th produced 2 to 3inches of rain across the Hutchinson area. Plugged drains in the Faris Elementary School courtyard in Hutchinson resulted insome flooding in the school.KSZ049-067>072-082>083-091>096-098>100Allen - Butler - Chautauqua - Cowley - Elk - Greenwood - Harper - Harvey - Kingman - Labette -Montgomery - Neosho - Reno - Saline - Sedgwick - Sumner - Wilson - Woodson31 1200CST1800CST 0 0 HeatKANSAS, SouthwestThe combination of temperatures in the mid to upper 90s and dewpoints in the low to mid 70s combined to produce oppressiveheat and humidity during the afternoon hours on the 31st. Heat indices ranged from 105 to 109 degrees, mainly over thesoutheastern quarter of Kansas generally east of Interstate 135. The only relief from the heat that day was a stout southerlywind.Trego County4 SSW Wakeeney 03 1930CST1940CST 0 0 Hail (0.75)Trego CountyWakeeney 03 1934CST 0 0 Hail (0.75)Trego County3 S Wakeeney 03 1937CST 0 0 Hail (1.25)Thunderstorms developed along an old outflow boundary during the evening and a few became severe.Stanton County4 ESE Manter 04052200CST1200CST 0 0 0.00K 0.00K Heavy RainStanton CountyManter 0405Rainfall of 3.50 was reported.2200CST1200CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.00 was reported.Thunderstorms produced heavy rainfall overnight.Clark County7 SE Sitka 07 1632CST 0 0 Hail (0.75)Clark County3 WNW Englewood 07 1705CST1905CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.10 was observed.Clark County3 WNW Englewood 07 1855CST 0 0 Hail (0.75)162

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SouthwestClark County1 NW Englewood 07 1900CST 0 0 Hail (1.00)Hot daytime temperatures and a weak upper level disturbance helped to trigger thunderstorms and a few were severe.Meade County2 WSW Collano 09 1800CST 0 0 Hail (0.88)Ford County1 NE Dodge City 09 2130CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)A backyard fence was blown halfway over.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Ford County3 WNW (DDC)Dodge City Arpt09 2140CST 0 0 Thunderstorm Wind (70EG)The top half of an eight inch diameter tree was snapped off.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Ford County5 NNW (DDC)Dodge City Arpt 09 2148CST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)The winds were estimated to be between 60 and 65 mph.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Ford County5 NNW (DDC)Dodge City Arpt 09 2148CST 0 0 Thunderstorm Wind (65EG)Two 15 foot tall pine trees were snapped off at the base and a trampoline with a cage was flipped over and blown about 90yards.Convergence along a nearly stationary boundary (weak) helped to initiate isolated thunderstorms in the early evening, a fewreached severe limits. Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Pratt CountyPreston 10 1500CST 0 0 Thunderstorm Wind (70EG)Ten to twelve inch diameter tree branches were blown down.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Ford County3 WSW Dodge City 10 1533CST 0 0 Hail (1.00)Ford County1 NNW Dodge City 10 1548CST 0 0 Hail (0.75)Ford County3 WNW (DDC)Dodge City Arpt10 1555CST 0 0 Hail (1.00)Considerable nickel sized hail fell as well.Ford County3 N Dodge City 10 1558CST 0 0 Hail (1.00)A few thunderstorms developed in the afternoon heat and became briefly severe.Haskell County4 WNW Sublette 11 1750CST 0 0 Thunderstorm Wind (52EG)A wind gust to 60 mph was estimated at this location.An isolated severe thunderstorm occurred near Sublette in the early evening hours. Note: The estimated wind gust of 52 knotsis equivalent to 60 mph.163

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SouthwestEllis County1 WSW Munjor 12 1810CST 0 0 Thunderstorm Wind (65EG)Thunderstorm wind gusts up to 75 mph snapped power poles in town.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Lane County5 N Dighton 12 1829CST1929CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.00 was reported.Ellis County1 WSW Munjor 12 1830CST 0 0 0.00K 1.00K LightningLightning set a couple of hay bales on fire.Ellis County1 WSW Munjor 12 1830CST 0 0 Thunderstorm Wind (65EG)Multiple power poles were snapped off at the base. An 18 inch diameter cedar tree was blown over onto a house. Severalutility sheds were blown apart.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Finney County5 SE Tennis 12 1837CST 0 0 Thunderstorm Wind (52EG)A wind gust to 60 mph was estimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Finney County6 SSE Tennis 12 1839CST 0 0 Thunderstorm Wind (59MG)Note: The measured wind gust of 59 knots is equivalent to 68 mph.Rush County2 NNE Loretta 12 1927CST 0 0 Thunderstorm Wind (52EG)A gust to 60 mph was estimated. A few one inch diameter tree branches were broken by the strong wind.Thunderstorms developed along a southeast moving surface trough and a few became severe. Note: The estimated wind gust of52 knots is equivalent to 60 mph.Ford County5 SSE Windthorst 14 1532CST 0 0 Hail (1.00)There were also wind gusts to 40 mph that accompanied the hail.Pratt County1 N Sawyer 14 1601CST 0 0 Thunderstorm Wind (56EG)Winds were estimated to be 65 mph.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Pratt County1 N Sawyer 14 1605CST 0 0 Thunderstorm Wind (56EG)Winds were estimated to be 60 to 70 mph.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Pratt County7 S Cairo 14 1620CST 0 0 Thunderstorm Wind (52EG)Winds were estimated to be 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.164

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SouthwestPratt County7 ENE Sawyer 14 1624CST 0 0 Thunderstorm Wind (61EG)Four inch diameter tree branches were broken by the strong wind.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Comanche County1 SW Coldwater 14 1630CST 0 0 Thunderstorm Wind (52EG)Winds were estimated to at least 60 mph as branches were breaking off of trees.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pratt County7 ENE Sawyer 14 1632CST 0 0 Thunderstorm Wind (52EG)Winds were estimated to be 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ness County1 W Ness City 14 1641CST 0 0 Hail (1.75)Pawnee County4 NNW Burdett Rozel Arpt 14 1730CST 0 0 Hail (1.25)Barber County2 E (P28)Medicine Lodge 14 1733CST 0 0 Thunderstorm Wind (65EG)Ten inch diameter tree branches were broken by the high wind.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Rush County6 S Nekoma 14 1737CST 0 0 Hail (1.75)Pawnee County2 SW Larned 14 1758CST 0 0 Hail (0.75)Pawnee County1 E Frizell 14 1800CST 0 0 Thunderstorm Wind (65EG)Power poles were blown down in the area.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Pawnee County2 SW Larned 14 1807CST 0 0 Hail (0.75)Pawnee County3 S Larned 14 1815CST 0 0 100.00K Thunderstorm Wind (78EG)Damage at the Heritage Feeders was reported. There were many tall standing structures with some sort of damage, includingthe feed mill, concrete silo, sheds and concrete walls tipped over.Note: The estimated wind gust of 78 knots is equivalent to 90 mph.Pawnee County2 WNW Larned 14 1815CST 0 0 2.00K Thunderstorm Wind (65EG)Road signs along highway 156 were blown down into adjacent fields.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.165

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SouthwestPawnee County4 NNW Zook 14 1815CST 0 0 Thunderstorm Wind (70EG)A quarter mile long stretch of power poles were blown down and a few 1 foot diameter trees were blown down. There werealso a few highway signs blown down.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Pawnee CountyLarned 14 1815CST 0 0 Thunderstorm Wind (70EG)There were numerous reports of damage in Larned with numerous large tree branches blown down and windows broken.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Scott County14 SE Shallow Water 14 1856CST 0 0 Hail (1.00)Lane County14 S Dighton 14 1901CST 0 0 Hail (0.88)Finney County10 NW Eminence 14 1905CST 0 0 Hail (0.88)Rush CountyMc Cracken 14 1919CST 0 0 Thunderstorm Wind (61EG)Trees and power lines were blown down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Finney County2 SE Eminence 14 1928CST 0 0 Hail (1.00)Finney County7 W Kalvesta 14 1941CST 0 0 Hail (1.00)Finney County8 WSW Kalvesta 14 1942CST 0 0 Hail (1.50)Wind gusts to 63 mph were measured as the hail fell.Finney County8 WSW Kalvesta 14 1942CST 0 0 Thunderstorm Wind (55MG)Hail 1.5 in diameter accompanied the high wind.Thunderstorms developed in a uncapped atmosphere during afternoon heating. Storms became organized in the presence ofoutflow boundaries. Note: The measured wind gust of 55 knots is equivalent to 63 mph.Stevens County5 SW Woods 16 0400CST0730CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.5 was reported.Stevens County3 S Woods 16 0400CST0730CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.0 was reported.Early morning thunderstorms produced heavy rainfall in the Stevens county area.Barber County1 E Kiowa Arpt 17 0000CST0600CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.05 was reported.166

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SouthwestBarber County8 WNW Hardtner 17 0000CST0645CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.25 was observed.Clark County9 NNE Sitka 17 0000CST0600CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.35 was observed.Clark County6 ESE Acres 17 0000CST0600CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.83 was observed.Clark County10 SSE Sitka 17 0000CST0600CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.90 was reported.Comanche County16 SE Wilmore 17 0000CST0625CST 0 0 0.00K 0.00K Heavy RainRainfall of 4.21 was observed.Comanche County4 NE Coldwater 17 0000CST0645CST 0 0 0.00K 0.00K Heavy RainRainfall of 4.07 was observed.Ford County3 S Ford 17 0000CST0600CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.80 was observed.Kiowa County1 SSW Haviland Arpt 17 0000CST0600CST 0 0 0.00K 0.00K Heavy RainRainfall of 3.48 was observed.Kiowa County1 W Haviland 17 0000CST0625CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.77 was observed.Kiowa County4 N Greensburg 17 0000CST0600CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.53 was observed.Pratt CountySawyer 17 0000CST0625CST 0 0 0.00K 0.00K Heavy RainRainfall of 2.30 was observed.An MCS moved slowly into the area during the late night of the 16th and was ending during the morning hours on the 17th.167

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SouthwestHamilton County7 NNE Syracuse 19 1650MST 0 0 Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Kearny County7 W Lakin 19 1846CST 0 0 Thunderstorm Wind (61MG)Note: The measured wind gust of 61 knots is equivalent to 70 mph.Kearny County1 SW Lakin 19 1905CST 0 0 Thunderstorm Wind (65EG)Power lines were blown down.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Kearny County2 SSW Deerfield 19 1915CST 0 0 Thunderstorm Wind (56EG)Winds were estimated to be 65 mph.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Finney County3 N Garden City 19 2026CST 0 0 Thunderstorm Wind (63MG)Pawnee County3 S Burdett Rucker Arpt 2324A weak front and upper level disturbance helped to generate scattered thunderstorms during the evening, a few of whichbecame severe. Note: The measured wind gust of 63 knots is equivalent to 72 mph.0800CST2000CST 0 0 Heavy RainRainfall of 2.80 was reported.Finney County3 E Rodkey 23 1508CST 0 0 Hail (0.88)Finney County2 ENE Rodkey 23 1510CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)A truck was blown off highway 50.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Finney County1 NNW Garden City 23 1538CST 0 0 2.00K 0.00K Thunderstorm Wind (61EG)Windows were blown out of a car.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Finney County2 NW Garden City 23 1538CST 0 0 Thunderstorm Wind (61EG)Damage was done to a chain link fence.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Ellis County3 S Hays 23 1903CST 0 0 Thunderstorm Wind (59MG)Note: The measured wind gust of 59 knots is equivalent to 68 mph.Ellis County1 W Hays 23 1908CST 0 0 1.50M 0.00K Thunderstorm Wind (87EG)168

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KANSAS, SouthwestThe most expensive damage was at Fort Hays State University, where the high winds blew off most of the roof from WeistHall. Vehicles in an adjacent parking lot were damaged by roof debris. Extensive water damage occurred to the interior of thebuilding. Some students and offices were relocated as a consequence of the damage. The rainfall was so heavy that drains onLewis Field were overwhelmed, and water accumulated under the special astro turf covering the field and lifted it from thefield. salvaged.Note: The estimated wind gust of 87 knots is equivalent to 100 mph.Ellis County2 WNW Hays 23 1908CST 0 0 10.00K 0.00K Thunderstorm Wind (78EG)Twenty power poles were blown down.Note: The estimated wind gust of 78 knots is equivalent to 90 mph.Ellis County3 S Hays 23 1910CST 0 0 Thunderstorm Wind (70MG)Note: The measured wind gust of 70 knots is equivalent to 81 mph.Ellis CountyCatharine 23 1925CST 0 0 Thunderstorm Wind (56EG)Edwards County3 ESE Ardell 2324Pawnee County1 NW Sanford 2324Pawnee County1 W Burdett 2324Power lines were blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.2000CST0800CST 0 0 Heavy RainRainfall of 5.00 was observed.2000CST0800CST 0 0 Heavy RainRainfall of 3.00 was reported.2000CST0800CST 0 0 Heavy RainRainfall of 2.98 was observed.Pawnee County1 NW Sanford 23 2249CST 0 0 Thunderstorm Wind (65EG)KENTUCKY, CentralThree to four inch diameter tree branches were blown down.Very severe wind gusts were reported with some of the severe thunderstorms that occurred during the evening. Heavy rainfallalso accumulated during the evening and overnight. Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Nelson County1 SE Bardstown 04 1515EST 0 0 Thunderstorm Wind (55EG)Several trees were blown down- mainly on the northern side of Bardstown.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Adair CountyKnifley 04 2215CST 0 0 Thunderstorm Wind (55EG)An emergency manager reported a house with a wall blown down and a roof partially blown off. Also, numerous trees andpower lines were down in the Casey Creek Rd. area.An extremely hot air mass across the Ohio Valley was in place on August 4 with excessive heat warnings issued for portions ofcentral Kentucky. By the afternoon convective temperatures were reached and scattered strong storms developed. A couple ofthese storms became strong enough to produce damaging wind gusts. Note: The estimated wind gust of 55 knots is equivalentto 63 mph.169

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, CentralHenry CountyNew Castle 05 0855EST 0 0 Thunderstorm Wind (52EG)Several trees were blown down in the New Castle area.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Harrison County1 N Cynthiana 05 0945EST 0 0 Thunderstorm Wind (52EG)A tree fell on a car in Cynthiana. Several other trees were also blown down throughout the county.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Logan County3 WSW Danby 05 0954CST 1 1 LightningA 16 year old Amish girl was struck in the head and killed by lightning while working in a field. She was pronounced dead atthe scene. F16OUAllen County4 ENE Mt Zion 05 1033CST 0 0 Thunderstorm Wind (52EG)Trees were blown down in Allen county.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clinton County1 NNW Huntersville 05 1055CST 0 0 Thunderstorm Wind (52EG)Several trees were blown down near Huntersville.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Adair County1 SE Cane Vly 05 1130CST 0 0 Thunderstorm Wind (60EG)A tree was blown down.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Taylor County5 SSE Romine 05 1220EST 0 0 Thunderstorm Wind (52EG)A tree was blown down and blocking Hwy. 55 10 miles south of Campbellsville.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Casey CountyBethelridge 05 1255EST 0 0 Thunderstorm Wind (52EG)Trees were blown down in Casey County in locations both east and west of Liberty.A surface cold front extended across Illinois into central Missouri early in the morning August 5. This moved into southernIndiana and into central Kentucky during the mid morning hours. This front interacted with warm humid air and moderateinstability across central Kentucky to produce strong to severe thunderstorms with damaging wind gusts. In addition, alightning strike in south central Kentucky killed a teenager who was working in her family's fields. Note: The estimated windgust of 52 knots is equivalent to 60 mph.Oldham CountyWestport 11 1420EST 0 0 Thunderstorm Wind (52EG)A few large trees were blown down in the town of Westport.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Taylor County1 N Campbellsville 11 1420EST 0 0 Thunderstorm Wind (52EG)Trees and power lines were blown down in three areas around Campbellsville. One tree fell on a car on Dixie Ave.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.170

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, CentralMonroe County1 ESE Grandview 11 1614CST 0 0 Thunderstorm Wind (52EG)A tree was blown down on Hwy. 100.A weak shortwave moved across the Ohio Valley during the day on August 11. This wave steepened mid level lapse rates,helping to generate convection across central Kentucky. A few of the stronger storms produced damaging wind gusts. Note:The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 E Indian Hills 12 1345EST 0 0 Thunderstorm Wind (52EG)Several large tree limbs were down near Ballard High School and on Shepherds Lane.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Hart CountyDogcreek 12 1525CST 0 0 Thunderstorm Wind (52EG)Several trees were blown down at the Dog Creek campground on Nolin Lake.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Hardin CountyRineyville 12 1540EST 0 0 Thunderstorm Wind (52EG)Part of a barn's roof was blown off.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Grayson CountyLeitchfield 12 1610CST 0 0 0.00K 0.00K Flash FloodFlooding was reported in a parking lot near the Leitchfield Sheriff's office. This forced a rapid removal of patrol cars.Breckinridge CountyHigh Plains 12 1710CST 0 0 Thunderstorm Wind (52EG)A barn was destroyed on High Plains Rd. just northeast of Custer. Multiple power outage were also reported in Custer.A weak shortwave crossed south central Kentucky August 12. This combined with the hot moist atmosphere to producescattered thunderstorms during the afternoon hours. Scattered damaging winds accompanied these storms. Additionally, thevery moist atmosphere led to torrential rainfall and isolated flash flooding in Grayson County. Note: The estimated wind gustof 52 knots is equivalent to 60 mph.Fayette County2 W Elmendore 13 1226EST 0 0 Thunderstorm Wind (52EG)Trees were blown down on Paris Pike and Russell Cave Roads.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Oldham County2 WSW Brownsboro 13 1900EST 0 0 Thunderstorm Wind (52EG)Several large trees were blown down in the Glen Oaks area of northeast Jefferson county.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Oldham County1 E Brownsboro 13 1905EST 0 0 Thunderstorm Wind (52EG)Trees were downed along Interstate 71.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Oldham County2 W Frazertown 13 1909EST 0 0 Thunderstorm Wind (52EG)Large pine trees were blown down and there was roof damage to horse barns at Silverbrook Stables on Hwy. 22 near theOldham and Jefferson County line.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.171

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, CentralOldham County1 SW Glenarm 13 1910EST 0 0 Thunderstorm Wind (52EG)Trees and power lines were blown down in Crestwood.A weak upper level wave moved out of Missouri into the lower Ohio valley during the afternoon hours of August 13. This,combined with afternoon temperatures that reached convective temperatures, spawned scattered thunderstorms. Some of thesethunderstorms reached severe levels with damaging wind gusts produced. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Ohio County1 NNE Narrows 14 1405CST 0 0 Thunderstorm Wind (52EG)A tree was blown down and blocking Bud Baughn Rd.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Breckinridge County2 SW Roff 14 1420CST 0 0 Thunderstorm Wind (52EG)A tree and power lines were blown down in the Rough River Lake area.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Henry CountySligo 14 1525EST 0 0 Thunderstorm Wind (52EG)Downed trees were blocking Highway 42 at Sligo.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Barren County2 ENE Glasgow 14 1550CST 0 0 Thunderstorm Wind (52EG)Several trees were blown down on New Salem Rd. The time was estimated based on radar.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 NNW Tucker Station 14 1603EST 0 0 Thunderstorm Wind (52EG)A tree was blown down in the 900 block of Blankenbaker Pkwy.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Bullitt CountyMt Washington 14 1630EST 0 0 5.00K 0.00K LightningTwo buildings were struck by lightning in Mt. Washington.Jefferson County1 N Pleasure Ridge Park 14 1631EST 0 0 Thunderstorm Wind (52EG)Trees were reported down at Kenwood Dr. and New Cut Rd.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 W Ashville 14 1638EST 0 0 Thunderstorm Wind (52EG)A tree was blown down and blocking half of Johnson School Rd.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 NNW Okolona 14 1700EST 0 0 0.00K 0.00K Flash FloodSix inches of water was flowing over the road at Outer Loop and Preston Hwy.Barren CountyDry Fork 14 1715CST 0 0 Thunderstorm Wind (52EG)Several trees were blown down on Thomerson Park Rd. The time was estimated based on radar.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.172

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, CentralJefferson County1 SSE Smyrna 14 1719EST 0 0 Heavy RainIn just 30 minutes, 2.24 inches of rain fell at the Louisville NWS office.Marion CountyLebanon 14 1719EST 0 0 Thunderstorm Wind (52EG)Trees were blown down and blocking W. Chandler St.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Monroe CountyFlippin 14 1720CST 0 0 0.00K Thunderstorm Wind (52EG)Two trees were blown down at HWY 100 and Stringtown Flippin Rd.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Monroe County2 N Sulphur Lick 14 1750CST 0 0 Thunderstorm Wind (52EG)A trained spotter reported an estimated wind gust of 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Monroe County1 W Tompkinsville 14 1755CST 0 0 Thunderstorm Wind (52EG)Trees and power lines were blown down all over Tompkinsville.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lincoln County1 E Waynesburg 14 1901EST 0 0 Thunderstorm Wind (52EG)Trees were blown down in Waynesburg near Hwy. 27 S. The time is estimated based on radar.The trailing edge of a Mesoscale Convective Complex across Indiana and Illinois interacted with a moist very unstableenvironment over central Kentucky. Isolated showers and thunderstorms developed into a broken line that slowly moved acrossthe region. Slow moving storms produced torrential rainfall and led to some isolated flash flooding. Wet microbursts alsoproduced wind damage scattered across the region. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Monroe County1 NW Gamaliel 18 0530CST 0 0 Heavy RainA trained spotter reported 3.15 inches of rain over 2 1/2 hours. Minor flooding was reported.Madison County2 WNW Reeds Crossing 18 0651EST 0 0 0.00K 0.00K FloodCatalpa Loop was closed due to flooding. Numerous other roads had minor flooding in the city.Monroe County1 NW Gamaliel 18 0854CST 0 0 Heavy RainThe public reported 6.31 inches of rain had fallen since midnight.Barren County3 ESE Park City3 NNW Oil City18 0904CST0915CST 0 0 0.00K 0.00K Flash FloodWater was running over the road at Gateway Ct. The road department had to put up barriers.173

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, CentralWarren County1 NNE Bowling Green 18 1039CST 0 0 0.00K 0.00K Flash FloodThere were flooded cars in the Fairview Plaza Shopping Center at US 31W and Fairview Ave.Warren County1 E Girkin 18 1051CST 0 0 0.00K 0.00K Flash FloodKentucky 743, Boiling Springs Rd., was flooded near Little Beaverdam Creek.Barren County1 NW Red Cross 18 1158CST 0 0 0.00K 0.00K Flash FloodHighway 68/80 was impassable near the Warren County line. Other impassable roads included Mayfield Mill Rd. near 68/80 ineastern Barren County and Highway 1297 west of Glasgow.Allen County1 NE Red Hill 18 1300CST 0 0 0.00K 0.00K FloodWater over KY 585 between mile markers 7 and 8 led to the road being closed.A stalled frontal boundary stretched from south central to eastern Kentucky on the morning of August 18. Tropical moisturestreaming north over the boundary enhanced by an upper level shortwave led to rounds of heavy showers and thunderstormsacross south central Kentucky. Torrential rainfall produced flash flooding and flooding across this area.Monroe CountyFlippin 19 0300CST 0 0 0.00K 0.00K Flash FloodNumerous roads were flooded in Flippin. One water rescue was reported. An estimated 2 to 3 inches of rain fell in 2 hours.KENTUCKY, EasternA low level circulation moving northeast across south central Kentucky interacted with a low level jet. With high precipitablewater values, torrential rainfall occurred with showers that developed. This led to isolated flash flooding in south centralKentucky.KYZ044-050>052-058>060-068>069-079>080-083>088-104-106>117-119>120Bath - Bell - Breathitt - Clay - Elliott - Estill - Fleming - Floyd - Harlan - Jackson - Johnson - Knott - Knox- Laurel - Lee - Leslie - Magoffin - Martin - McCreary - Menifee - Montgomery - Morgan - Owsley - Perry- Pike - Powell - Pulaski - Rockcastle - Rowan - Wayne - Whitley - Wolfe04 1100EST1700EST 0 0 0.00K 0.00K Excessive HeatA large area of high pressure, both at the surface and aloft, brought record breaking heat to eastern Kentucky during theafternoon and evening hours of August 4th. High temperatures across the area were between 95 and 100 degrees for numerouslocations. All 17 counties in the Excessive Heat Warning for that day met or exceeded warning criteria. In fact, the only countyof the 33 counties covered by the Jackson weather office that did not meet heat warning criteria on August 4th was Letcher.Heat indices ran between 105 and 115, with a few areas approaching 120 degrees, on this day. The summer of 2010 will likelyrank as one of if not the hottest summer on record in eastern Kentucky.Pike County3 SE Gulnare 04 1345EST1350EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A large tree was blown down, blocking Hwy 194 between Millers Creek and Lowes Branch.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pike County1 NW Gulnare 04 1420EST1425EST 0 0 3.00K 0.00K Thunderstorm Wind (53EG)Trees were blown down on KY Hwy 94 a mile northwest of Gulnare.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Pike County4 WNW Meta 04 1425EST1430EST 0 0 3.00K 0.00K Thunderstorm Wind (53EG)Tree were blown down along KY Hwy 194 four miles west northwest of Meta.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.174

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternRowan County7 NE Morehead 04 1527EST1532EST 0 0 3.00K 0.00K Thunderstorm Wind (51EG)A utility pole was blown down along Buffalo Branch Rd 7 miles northeast of Morehead.Note: The estimated wind gust of 51 knots is equivalent to 59 mph.Rowan County2 SW Elliottville 04 1555EST1600EST 0 0 5.00K 0.00K Thunderstorm Wind (53EG)Trees were reported to have been blown down in the Dry Creek community.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Elliott County4 W Sandy Hook 04 1610EST1615EST 0 0 3.00K 0.00K Thunderstorm Wind (53EG)County dispatch reports that trees were blown down near Sandy Hook.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Perry County1 SE Hazard 04 1625EST1630EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Large limbs were blown down in the community of Diablock.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pike CountyPhyllis 04 1715EST1720EST 0 0 5.00K 0.00K Thunderstorm Wind (53EG)Trees were blown down along KY Hwy 194 in the Grapevine.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Pike County2 WNW Biggs 04 1725EST1730EST 0 0 5.00K 0.00K Thunderstorm Wind (53EG)Trees were reported down along KY Hwy 194 on Hunt Branch Mtn.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Pike County2 SSE Mouthcard 04 1740EST1745EST 0 0 5.00K 0.00K Thunderstorm Wind (53EG)Trees were reported down along KY Hwy 460 near the Virginia state line.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Rowan CountyCranston 04 1800EST1805EST 0 0 3.00K 0.00K Thunderstorm Wind (53EG)Trees were blown down.During the afternoon and evening hours of August 4th, scattered severe thunderstorms caused tree and power line damage forseveral counties across eastern Kentucky. Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Fleming CountyFlemingsburg 05 1025EST1030EST 0 0 4.00K 0.00K Thunderstorm Wind (60EG)Four trees were blown down from Flemingsburg towards Dalesburg on Hwy 57 and Cherry Grove Rd.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.175

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternFleming CountyDalesburg 05 1025EST1030EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Hwy 57 in Dalesburg.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Breathitt County2 W Jackson 05 1229EST1234EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Highway 30 W.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Breathitt CountyJackson 05 1229EST1234EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Multiple trees were blown down near Jackson.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Pulaski CountySomerset 05 1305EST1310EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A member of the public phoned in a report of a 60 mph wind gust near Southwest High School in Somerset.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Rockcastle County1 S Brodhead 05 1308EST1313EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Hwy 3245.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pulaski CountySomerset 05 1312EST1317EST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)Numerous trees were blown down on Ringo Rd, University Drive, and Hwy 2993.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Wayne County4 SW Monticello 05 1320EST1325EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on KY Hwy 858.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wayne CountyMonticello 05 1325EST1330EST 0 0 7.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down in and near Monticello, blocking roads.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Jackson CountyMc Kee 05 1329EST1334EST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)Numerous trees were blown down on Hwy 30 and Cornelius Rd.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.176

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternPike County1 S Aflex 05 1330EST1335EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down near Aflex.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wayne CountyCooper 05 1330EST1335EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on KY Hwy 1258.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clay CountyBurning Spgs 05 1355EST1400EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Pike CountyKimper 05 1355EST1400EST 0 0 4.00K 0.00K Thunderstorm Wind (55EG)Trees were reported down along KY Hwy 194 near Kimper.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Clay CountyOneida 05 1400EST1405EST 0 0 25.00K 5.00K Thunderstorm Wind (55EG)A few large trees and several large limbs were blown down. Corn was blown flat in a field and shingles were removed fromsome roofs in the area.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Knox County5 NNW Barbourville 05 1405EST1410EST 0 0 3.00K 0.00K Thunderstorm Wind (53EG)A few trees were blown down north northwest of Barbourville.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Pike County2 E Phyllis 05 1405EST1410EST 1 0 20.00K 0.00K Thunderstorm Wind (53EG)A man was killed when a tree fell on his car as he was driving past the Grapevine Elementary School on Hwy 194.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Pike CountyBiggs 05 1410EST1415EST 0 0 5.00K 0.00K Thunderstorm Wind (53EG)Trees were blown down along KY Hwy 194.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Whitley CountyRockholds 05 1410EST1415EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down in Rockholds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.177

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternWhitley County3 E Rockholds 05 1425EST1430EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)One tree was blown down near the intersection of KY Hwy 779 and Whetstone Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bell County3 E Meldrum 05 1435EST1440EST 0 0 4.00K 0.00K Thunderstorm Wind (55EG)Four trees were blown down.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Perry County6 WNW Hazard 05 1435EST1440EST 0 0 30.00K 0.00K Thunderstorm Wind (60EG)Numerous trees and power lines were blown down in the Busy, Big Willard, and Briar Fork communities.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Perry CountyHazard 05 1440EST1445EST 0 0 10.00K 0.00K Thunderstorm Wind (60EG)Numerous trees were blown down in the Hazard and Viper areas.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Harlan CountyEvarts 05 1505EST1510EST 0 0 3.00K 0.00K Thunderstorm Wind (53EG)Three trees were blown down in Evarts.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Letcher CountyThornton 05 1515EST1520EST 0 0 3.00K 0.00K Thunderstorm Wind (53EG)Three trees were blown down in Thornton.The atmosphere was primed for strong to severe thunderstorm activity on August 5th. At the surface, a very warm and moist airmass was in place, as evidenced by the 70+ degree dewpoints that were being seen in the surface obs and the -4 to -6 liftedindices that were showing up in the SPC forecast maps. A 25-40 kt low level jet and a bullseye of moisture convergent werealso present. The storms began firing along a cold front that was approaching from the northwest. The most widespread activitytook place during the afternoon hours. All of the damage reports received that day were of downed trees. Note: The estimatedwind gust of 53 knots is equivalent to 61 mph.KYZ050-052-058-068-079-083-085>086-104-106-110-113>116Clay - Elliott - Estill - Floyd - Knott - Knox - Montgomery - Morgan - Owsley - Perry - Powell - Pulaski -Rockcastle - Rowan - Wayne - Whitley09 1100EST1700EST 0 0 0.00K 0.00K HeatDuring the afternoon and early evening hours of August 9th, a numerous locations around eastern Kentucky experienced veryhot temperatures. Highs were between 93 and 96 degrees with heat index values around 100 degrees.KYZ044-050-052-058-079-083>086-104-106>108-110>120Breathitt - Clay - Elliott - Estill - Fleming - Floyd - Johnson - Knott - Knox - Lee - Leslie - Letcher - Martin- McCreary - Montgomery - Morgan - Owsley - Perry - Pike - Powell - Pulaski - Rowan - Wayne - Whitley- Wolfe10 1100EST1700EST 0 0 0.00K 0.00K HeatA very large and strong area of high pressure brought a heat wave to eastern Kentucky on August 10th. During the afternoonand evening hours on this day, high temperatures in numerous locations soared to between 93 and 98 degrees, with heat indexvalues around 100 degrees.178

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, Eastern11 1100EST1700EST 0 0 0.00K 0.00K HeatKYZ050>052-058>060-068-079>080-083-085>086-104-106>117-119Bath - Breathitt - Clay - Elliott - Estill - Floyd - Johnson - Knott - Knox - Laurel - Lee - Leslie - Magoffin -Martin - Menifee - Montgomery - Morgan - Owsley - Perry - Powell - Pulaski - Rockcastle - Rowan -Wayne - Whitley - Wolfe11 1100EST1700EST 0 0 0.00K 0.00K HeatNumerous locations experienced highs between 93 and 97 and heat indices around 100 degrees during the afternoon and earlyevening hours of August 11th.Morgan County1 E Lenox 11 1555EST1600EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Hwy 650 one mile off of Hwy 172 near Lenox.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Elliott CountyBruin 11 1650EST1655EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down at Hwy 409 in Bruin.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Morgan CountyCottle 11 1713EST1718EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Hwy 460 east in Cottle.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Knott CountyMousie 11 1845EST1915EST 0 0 0.00K 0.00K Heavy RainA spotter reported that one inch of rain fell in Mousie between 745 and 815 pm.Pike County1 NNW Lookout 11 1846EST1851EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)One tree was reported down near Lookout.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pike County1 NNW Elk Horn City 11 1903EST1908EST 0 0 2.00K 0.00K Thunderstorm Wind (53EG)Two trees were reported down along KY Hwy 80 just outside of Elkhorn City.Several lines and complexes of thunderstorms formed to the east of a weak surface trough, and east of a stationary frontalboundary that stretched from the lower Great Lakes to the Mid Atlantic coast. A few of these storms caused isolated treedamage and heavy rainfall at several locations across eastern Kentucky on August 11th. Note: The estimated wind gust of 53knots is equivalent to 61 mph.KYZ044-050-052-058-068-079>080-083>086-088-104-106>108-111-113>116-118Clay - Elliott - Estill - Fleming - Harlan - Johnson - Knott - Knox - Laurel - Lee - Letcher - McCreary -Montgomery - Morgan - Owsley - Perry - Powell - Pulaski - Rockcastle - Rowan - Wayne - Whitley - Wolfe12 1100EST1700EST 0 0 0.00K 0.00K Excessive Heat179

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternStrong high pressure continued to bring very hot and humid weather to eastern Kentucky during the afternoon and earlyevening hours of August 12th. High temperatures for numerous counties reached 93 to 98 degrees, with heat index values at orabove 100 degrees.Perry County2 NNW Bulan 12 1530EST1535EST 0 0 3.00K 0.00K Thunderstorm Wind (53EG)Dispatch reported that a few trees were blown down near Bulan.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Perry CountyHazard 12 1535EST1540EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Dispatch reported that a tree was blown down along Combs Rd in Hazard.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Estill CountyIrvine 12 1813EST1818EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)Dispatch reported that a tree had been blown down onto a home.Scattered strong and isolated severe thunderstorms moved across eastern Kentucky on August 12th. Isolated incidents of treedamage was reported in Estill and Perry counties. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.KYZ044-050-052-058-068-080-083-086-104-110>115Breathitt - Elliott - Estill - Fleming - Floyd - Knott - Knox - Laurel - Lee - Montgomery - Owsley - Perry -Powell - Rockcastle - Rowan - Wayne13 1100EST1700EST 0 0 0.00K 0.00K Excessive HeatThe same ridge of high pressure that brought oppressive heat and humidity to eastern Kentucky most of the week, againbrought scorching heat to the coalfields on August 13th. High temperatures were in the low to mid 90s with heat indices onceagain around 100 degrees.Whitley CountyRockholds 13 1415EST1420EST 0 0 7.00K 0.00K Thunderstorm Wind (55EG)Several pine trees were blown down on Rt 511 near Cripple Creek Rd.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Whitley County4 SSW Corbin 13 1415EST1420EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A large tree was blown onto Hwy 26 at Eaton, completely blocking the roadway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Knox CountyBaileys Switch 13 1445EST1450EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Dispatch reports that large limbs were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Powell CountyClay City 13 1500EST1505EST 0 0 7.00K 0.00K Thunderstorm Wind (50EG)Dispatch reported that a tree fell on a vehicle on Main St, injuring two of the passengers.180

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternSeveral small clusters of strong to severe thunderstorms brought down a few trees in Whitley, Knox, and Powell counties. Twopeople were injured when a tree fell on a car in Clay City. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.KYZ044-050-052-058-079-083-085>086-104-106-108-110>111-113>116-119Clay - Elliott - Estill - Fleming - Floyd - Knott - Knox - Laurel - Lee - Martin - Montgomery - Morgan -Owsley - Perry - Pulaski - Rowan - Wayne - Whitley - Wolfe14 1100EST1700EST 0 0 0.00K 0.00K Excessive HeatThe residents of eastern Kentucky had to endure one more day of excessive heat and humidity on August 14th. Hightemperatures were again in the low to mid 90s with a heat index of around 100.Estill County8 SW Irvine 14 1855EST1900EST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)The emergency management office reported that three trees were blocking the Happy Top Roadway and had to be removed 8miles southwest of Irvine.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Fleming CountyGoddard 14 1855EST1900EST 0 0 20.00K 0.00K Thunderstorm Wind (55EG)The county dispatch office reported numerous trees down countywide.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Fleming CountyGoddard 14 1855EST1900EST 0 0 25.00K 0.00K Thunderstorm Wind (55EG)The county dispatch office reported numerous trees down countywide.Pulaski County2 WSW Ringgold2 SW Sugar HillNote: The estimated wind gust of 55 knots is equivalent to 63 mph.14 1900EST1950EST 0 0 0.00K 0.00K Flash FloodWater was reported over roads on S Hwy 27, N Hwy 1247, and Hwy 39 in the Somerset area. Reports indicated that 6 to 12inches of water was either standing on or flowing across the aforementioned roads.Rowan CountyHaldeman 14 1925EST1930EST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)Trees were blown down in Haldeman.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Pulaski County5 SW Nancy 14 1935EST2000EST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)The roof was blown off of a home on Old Ridge Road 5 miles southwest of Nancy.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Pulaski CountySomerset 14 1935EST1955EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Power outages were reported in and around Somerset including along Hwy 27. Crews were still out at report issuance restoringpower to residences and businesses around Somerset.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.181

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternPulaski CountySomerset 14 1935EST1955EST 0 0 125.00K 0.00K Thunderstorm Wind (55EG)Trees and power lines were blown down mainly in the Somerset area. Areas that received tree and power line damage includedSlate Branch Rd south of Somerset, Hwy 1643 east of Somerset, Ferguson, and Bourbon Rd in Oakhill.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Wolfe CountyToliver 14 1940EST1950EST 0 0 6.00K 0.00K Thunderstorm Wind (53EG)Numerous large tree limbs were blown down onto area roadways.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Rowan CountyMorehead 14 2025EST2030EST 0 0 5.00K 0.00K Thunderstorm Wind (53EG)Jackson County1 WNW WelchburgEgyptPower lines were blown down in Morehead.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.14 2040EST2255EST 0 0 0.00K 0.00K FloodThe county dispatch office reported 3 to 4 feet of water over Welchburg Rd in Tyner. Heavy rain began falling around 920 pm.The water was still over the road as of 11 pm.Martin CountyBeautyWarfield14152255EST0024EST 0 0 0.00K 0.00K Flash FloodSome people had to be rescued from their homes due to rising flood waters in Beauty.A warm and unstable air mass, combined with a strong cold front, set the stage for severe weather across eastern Kentucky onAugust 14th. Strong to severe thunderstorms downed trees and power lines, caused flooding, and did damage to a few homes.Martin County1 W Inez 14 2300EST2345EST 0 0 0.00K 0.00K FloodStreams were over roads and bridges in Inez for a short period of time.Isolated strong to severe thunderstorms felled trees in Pulaski, Estill and Rockcastle counties during the afternoon and eveningof August 15th.Martin County17 WNW Milo10 N Job14152300EST0024EST 0 0 0.00K 0.00K Flash FloodNumerous roads around the county were closed due to flood water flowing across them. This included Hwy 40.A warm and unstable air mass, combined with a strong cold front, set the stage for severe weather across eastern Kentucky onAugust 14th. Strong to severe thunderstorms downed trees and power lines, caused flooding, and did damage to a few homes.Estill County8 S Irvine 15 1515EST1520EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)An employee of the county garage stated that an 8 inch diameter tree fell across Jake's Heavenly Highway. The employee liveson this road and cut the tree and removed it from the roadway himself.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.182

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternEstill County3 ESE Pryse 15 1535EST1540EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down and onto Old Landing Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockcastle County2 WNW Brodhead 15 1715EST1720EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)The local dispatch office reported that a tree had been blown down near Brodhead.Isolated strong to severe thunderstorms felled trees in Pulaski, Estill and Rockcastle counties during the afternoon and eveningof August 15th. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bell CountyPonzaVarilla18 0500EST1006EST 0 0 0.00K 0.00K Flash FloodHeavy rain in Bell County led to the flooding of a barn and field in the Calvin area.Leslie CountyThousandsticks 18 0500EST1308EST 0 0 0.00K 0.00K Heavy RainA trained spotter measured 2.02 inches of rainfall in Thousandsticks over the past 24 hrs.Mccreary CountyStearns 18 0500EST1345EST 0 0 0.00K 0.00K Heavy RainA volunteer weather observer reported that 3.39 inches of rain had fallen in Stearns since 7 am.Mccreary CountyStearns 18 0500EST1345EST 0 0 0.00K 0.00K Heavy RainThe McCreary County EM measured 2.77 inches of rain in Stearns between 6 am and 245 pm.Pulaski County5 W Bee Lick 18 0500EST1100EST 0 0 0.00K 0.00K Heavy RainA trained spotter measured 2 inches of rainfall between 6 am and noon.Pulaski County7 ESE Somerset 18 0500EST1240EST 0 0 0.00K 0.00K Heavy RainA volunteer weather observer reported that 3.8 inches of rain had fallen 7 miles east southeast of Somerset since 7 am.Breathitt CountyJackson 18 0732EST 0 0 0.00K 0.00K Heavy RainAn NWS employee reported 3 inches of water over part of Hwy 15 near the northwest end of Jackson.Whitley CountyCorbin 18 0742EST 0 0 0.00K 0.00K FloodA trained weather spotter reported 3 to 12 inches of water over Bacon St in Corbin.183

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternWhitley County1 WSW Corbin 18 0744EST0944EST 0 0 0.00K 0.00K Flash FloodThe EOC and local fire dept reported that several roads in Corbin had water running across them; this included portions ofMaster St, the intersection of 5th and Steel Streets, and the underpass on Roy Kidd Ave between Main St and the post office.Whitley CountyCorbin 18 0744EST1116EST 0 0 0.00K 0.00K FloodThe Corbin police dept reported that flooding was still occurring throughout Corbin.Whitley CountyCorbin 18 0745EST0920EST 0 0 0.00K 0.00K Flash FloodNumerous streets in the city of Corbin were still experiencing flash flooding.Whitley County1 SW Corbin 18 1000EST1237EST 0 0 0.00K 0.00K FloodThe Corbin Police Dept reported that parts of Bacon Street near Corbin were still under water. Most of the flood waters inCorbin had already receded.Scattered strong thunderstorms brought flooding to an area of eastern KY south of the Hal Rogers Parkway and Highwaycorridor on August 18th. Numerous reports of flooding were received from Whitley and Bell counties.Whitley CountyWilliamsburg1 NNW Savoy19 0830EST0930EST 0 0 0.00K 0.00K FloodFlowing water of an undetermined depth made the 3000 block of Hwy 26 impassable in Williamsburg.An area of slow moving thunderstorms caused flooding in Williamsburg on the morning of August 19th.Whitley CountyCorbin 21222140EST0140EST 0 0 0.00K 0.00K FloodA portion of Master St in Corbin had 1 to 1.5 feet of water across it. Craig Rd in west central Whitley county also had wateracross it. Both roads were still open when the reports were phoned in.Whitley CountyClio 21222325EST0733EST 0 0 0.00K 0.00K FloodThe local dispatch office reported that three feet of water was across the intersection of US Hwy 25W and KY Hwy 204. Bothroads were closed prior to this time due to high water.Whitley County1 WNW Wofford 21222325EST0733EST 0 0 0.00K 0.00K FloodThe dispatch office reported that KY Hwy 26 was closed due to high water in the Jacks Fork area.Whitley County2 NNE Krupp 21222325EST0733EST 0 0 0.00K 0.00K FloodThe dispatch office reported that Craig Road was closed at its intersection with Log Cabin Road due to high water.184

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, EasternA small cluster of slow moving thunderstorms with intense rainfall caused flooding in portions of Whitley county during thenight of August 21st. Most of the flooding occurred in central Whitley county.KENTUCKY, NortheastCarter CountyGrayson 04 1550EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down in town. A metal roof was damaged.In a hot and humid air, thunderstorms moved through southeast Ohio and mainly into West Virginia. However, one southerncluster did affect northeast Kentucky. Low level convergence was aided by a leftover boundary from early morningconvection. The thunderstorms moved southeast around 25 mph. Wind gusts were the main hazard. The tall thunderstormsalso produced considerable cloud to ground lightning. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lawrence CountyLouisa1 N Busseyville11 1845EST1945EST 0 0 5.00K 0.00K Flash FloodRoads were flooded by overflowing small streams and by poor drainage. No dwellings were flooded.With plenty of sunshine, a convective complex developed during the heat of the afternoon over central Ohio in a weak windflow. The storms intensified as they drifted southeast into southern Ohio and Kentucky. The rain did bring some temporaryrelief from the heat. However, minor flash flooding occurred. Rain rates of up to 2 inches in an hour were likely.Carter CountyGrayson 14 1945EST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down. A few trees fell onto power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greenup CountyFlatwoods 14 2005EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Boyd CountySummit1 ENE WinslowA few trees and several large branches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.14 2020EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees and large branches were blown down.Thunderstorms developed during the afternoon over western Ohio and southeast Indiana. This was well south of a front, butalong a boundary leftover from previous convection. The storms intensified as they moved into northeast Kentucky during theevening hours. Wind damage was the main hazard. However, brief localized downpours of an inch in 30 minutes did cause theusual minor street flooding. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.KENTUCKY, NorthernRobertson County3 NNW Mt Olivet 05 0955EST1000EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Multiple trees were reported down in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mason County2 S Maysville 05 1015EST1022EST 0 0 8.00K 0.00K Thunderstorm Wind (55EG)Numerous trees were knocked down and siding was off of a house due to damaging thunderstorm winds. A roof was also takenoff a barn due to the winds.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.185

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, NorthernMason CountyMays Lick 05 1015EST1020EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mason County1 S Maysville 05 1025EST1026EST 0 0 Thunderstorm Wind (65EG)The spotter estimated the wind gust.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Lewis County3 WNW Tollesboro 05 1038EST1042EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A few trees were reported down due to damaging thunderstorm winds.A complex of storms moved across Kentucky during the morning hours of the 5th. The main threat was damaging winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Boone CountyBurlington 14 1700EST1705EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Power poles were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lewis County5 S Trinity 14 1915EST1920EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Several trees were reported down countywide due to damaging thunderstorm winds.Lewis CountyRibolt3 E TollesboroNote: The estimated wind gust of 50 knots is equivalent to 58 mph.14 1917EST2000EST 0 0 5.00K 0.00K Flash FloodWater was reported to be rushing across roads due to heavy rainfall. There was also some flooding of underpasses. Onerainfall measurement was of 5.64 inches of precipitation.A warm and moist air mass was in place across the region during the afternoon hours. Temperatures were in the upper 80s tolower 90s with dewpoints in the low to middle 70s. A weak mid level short wave combined with residual boundaries allowedfor scattered thunderstorm development through the mid afternoon hours. These thunderstorms continued into the earlyevening hours.KENTUCKY, SouthwestKYZ001>016-018>020Ballard - Caldwell - Calloway - Carlisle - Crittenden - Daviess - Fulton - Graves - Henderson - Hickman -Hopkins - Livingston - Lyon - Marshall - McCracken - McLean - Trigg - Union - Webster03310000CST2359CST 0 0 0.00K Drought186

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, SouthwestModerate drought conditions developed over much of western Kentucky. Rainfall for the months of June, July and August wasvariable, consisting of isolated to widely scattered showers and thunderstorms. Many locations were one to over three inchesbelow normal for the month of August. The Office of the State Climatologist and the Kentucky Energy and EnvironmentCabinet designated most western KY counties a drought management area because water supplies were down. The governor ofKentucky sought a federal disaster declaration for west Kentucky due to substantial agricultural losses due to drought. Drypastures and diminished stock ponds were problematic for livestock producers. A farmer with corn in Daviess County revealedthat his corn yield was down about 30 percent from last year's yield of 160 to 170 bushels per acre. The extension agent inMcLean County stated that the drought really cut into the soybean and corn crops. He stated that the soybean harvest could bedown by more than 50 percent and the corn off by 40 percent. Hot conditions increased evaporation rates and crop stress. Dueto increased wildfire risk, a ban on outdoor burning was imposed in a number of counties from Crittenden and Lyon west to theMississippi River. An upper level ridge of high pressure remained firmly entrenched over the southern states during most of themonth.03041000CST2000CST 0 0 0.00K 0.00K Excessive HeatKYZ002>022Ballard - Caldwell - Calloway - Carlisle - Christian - Crittenden - Daviess - Graves - Henderson - Hickman- Hopkins - Livingston - Lyon - Marshall - McCracken - McLean - Muhlenberg - Todd - Trigg - Union -Webster03041000CST2000CST 1 0 0.00K 0.00K Excessive HeatExcessively high heat indices were recorded in the late morning and afternoon hours of both the 3rd and 4th. On the 3rd, theheat index peaked at 115 degrees at the Paducah airport, 118 at the Owensboro airport, and 112 degrees at the Fort Campbellairfield near Hopkinsville. Heat indices only fell to between 85 and 90 degrees at sunrise. On the 4th, heat indices peaked at114 at Paducah, 119 at Owensboro, and 114 near Hopkinsville. Actual air temperatures reached 104 degrees at Paducah and103 at Owensboro. In Graves County, a 64-year-old man collapsed in his home from heat-related stress after doing yard work.The man suffered from pre-existing medical conditions, but the cumulative effect of the heat was a primary factor. A large fishkill at a small pond in Ballard County was blamed on the heat. About 200 fish died in the one-acre pond. There were reportsthat several dogs died because of the heat. A large, strong high in the upper levels of the atmosphere overspread the southernhalf of the nation.Marshall CountyHardin 03 1551CST 0 0 34.00K 5.00K Thunderstorm Wind (61EG)Several trees were blown down, completely blocking a side street. A few power poles were snapped. A barn was severelydamaged, and at least ten acres of corn were flattened.An isolated severe microburst occurred during the extreme heat and humidity late in the afternoon. The storm that produced themicroburst formed in an extremely unstable air mass with light winds aloft. Note: The estimated wind gust of 61 knots isequivalent to 70 mph.Christian County1 S Bluff Spg 04 1555CST 0 0 0.00K 0.00K Hail (0.88)Christian County1 S Bluff Spg 04 1555CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Trigg County1 SE Laurel Furnace 04 1635CST 0 0 20.00K 0.00K Thunderstorm Wind (52EG)Tree limbs were blown down, damaging a vehicle. Small trees were down, and larger trees were damaged. The wind damageoccurred in the Land Between The Lakes National Recreation Area near the Tennessee state line.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Caldwell County4 SE Princeton 04 1638CST 0 0 10.00K 0.00K Thunderstorm Wind (61EG)A microburst demolished a wood barn.Isolated thunderstorms pulsed up to severe levels. The storms occurred in a hot and very unstable air mass ahead of a weak coldfront that extended from central Indiana to southeast Missouri. Winds aloft were very weak due to an upper level high. Note:The estimated wind gust of 61 knots is equivalent to 70 mph.187

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, SouthwestKYZ001>022 Ballard - Caldwell - Calloway - Carlisle - Christian - Crittenden - Daviess - Fulton - Graves - Henderson -Hickman - Hopkins - Livingston - Lyon - Marshall - McCracken - McLean - Muhlenberg - Todd - Trigg -Union - Webster09151000CST2000CST 0 49 0.00K 0.00K Excessive HeatA strong and very persistent high in the upper levels of the atmosphere was responsible for seven consecutive days of heatindices at or above 105 degrees. The high was centered over the Lower Ohio Valley for the first few days of the heat wave,then it shifted slightly southward and weakened. The summer as a whole was among the hottest on record. The heat indexpeaked mostly between 105 and 110 degrees at airport sites during each afternoon of the event. Heat indices during the earlymorning hours were mostly in the mid to upper 80's. There were at least 13 heat-related illnesses treated by hospitals in thePaducah area. Twenty-nine cases of heat exhaustion were treated in the Owensboro area, and seven cases in the Hopkinsvillearea.Trigg County3 NNW Cadiz 12 1400CST 0 0 2.00K 0.00K Thunderstorm Wind (52MG)A mobile spotter measured a wind gust of 60 mph on Highway 139 about three miles south of Interstate 24. Numerous treelimbs were down.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Trigg CountyCanton 12 1405CST 0 0 20.00K 0.00K Thunderstorm Wind (52EG)A boat dock on Lake Barkley was twisted and blown onto shore. A pontoon boat that had been docked there ended up next to aneighbor's dock. Numerous tree limbs were blown down.Isolated microbursts were produced by thunderstorms that formed in a hot and very unstable air mass. The atmosphere wascharacterized by a weak flow regime resulting from persistent ridging in the mid and upper levels. Note: The estimated windgust of 52 knots is equivalent to 60 mph.Lyon County2 ESE Saratoga 14 1325CST 0 0 50.00K 0.00K Thunderstorm Wind (61EG)A microburst produced a very small but intense damage path along Eddy Creek near the Caldwell County border. Twistedmetal and lumber from a destroyed roof were blown across a roadway. The roof was a pitched tin roof that was added over aflat roof. Metal debris was wrapped around a stop sign. At least one outbuilding was destroyed, and others had roofs missing ordamaged. The damage area was less than one-half mile long.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Graves County4 SW Hickory 14 1404CST1406CST 0 0 15.00K 0.00K Thunderstorm Wind (65EG)A couple of dozen tree limbs were blown down. An aluminum shed was demolished and blown one-third to one-half mile. Atrampoline was blown into a roof and over a tree. Moderate shingle damage occurred to a house and barn. The microburstdamage area was about one mile long and two miles wide. Peak winds were estimated near 75 mph.Graves CountyWingoWater VlyNote: The estimated wind gust of 65 knots is equivalent to 75 mph.14 1430CST1445CST 0 0 10.00K 0.00K Thunderstorm Wind (54MG)A wind gust to 62 mph was measured at a mesonet site six miles southwest of Mayfield. Wind gusts were estimated around 60mph from Wingo to Water Valley. Tree limbs and small trees were blown down.Note: The measured wind gust of 54 knots is equivalent to 62 mph.Graves CountyWingo 14 1440CST 0 0 0.00K 0.00K Hail (0.75)Hickman County4 SSE Beelerton 14 1450CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated near 60 mph. Tree limbs and small trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.188

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010KENTUCKY, SouthwestFulton CountyFulton 14 1454CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated near 60 mph. Small trees and tree limbs were blown down.Microbursts occurred in association with a cluster of thunderstorms that formed in a very hot and unstable air mass. The stormswere aided by very weak surface troughing that extended from southeast Missouri across the Lower Ohio Valley. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.KYZ021Muhlenberg31 1300CST2300CST 0 0 10.0K 0.00K WildfireA wildfire just off U.S. Highway 62 in the eastern part of the county burned 265 acres. Moderate drought conditions and a drysouthwest breeze created favorable conditions for wildfires. An upper level ridge of high pressure remained firmly entrenchedover the southern states during most of the month.LOUISIANA, NortheastLAZ007>009-015>016-023>026Catahoula - Concordia - East Carroll - Franklin - Madison - Morehouse - Richland - Tensas - WestCarroll01040000CST2000CST 0 0 0.00K 0.00K Excessive HeatA four day stretch of extreme temperatures occurred across the region to start off the month of August. High pressure wasfirmly entrenched across the southeast and allowed temperatures to soar into the triple digits across much of the region. Acrossthe NWS Jackson, MS forecast area, 19 record highs were set between August 1st and 4th. Additionally, relatively highhumidity levels made conditions even more oppressive, with heat index readings surpassing 110 degrees in many areas.01310000CST2359CST 0 0 0.00K 500.0K DroughtLAZ008-015>016-023>026Catahoula - Concordia - East Carroll - Franklin - Madison - Richland - Tensas - West Carroll01310000CST2359CST 0 0 0.00K 4.0M DroughtVery dry conditions continued across northeast portions of Louisiana during August. The dry stretch resulted in a combinationof severe (D2) and extreme (D3) drought conditions continuing across northeast Louisiana despite a few locations receivingabove normal rainfall for the month. Crops were put under more stress from the hot and dry conditions. The likely impact willbe less crop yields when harvest arrives in early Fall.Morehouse Parish2 SSE Wardville 03 1430CST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Two trees and a number of large limbs were down. One house had the back awning blown over the house into the front yard.Showers and thunderstorms developed during the afternoon and evening hours of August 3rd. Some of these storms produceddamaging winds. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin Parish4 N Winnsboro 05 1345CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One large tree fell on Highway 868.Showers and thunderstorms developed during the afternoon hours of August 5th. Some of the thunderstorms brought heavyrain, damaging winds, and some hail. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison Parish1 E Tallulah 09 1632CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Numerous large limbs were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.189

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, NortheastEast Carroll Parish1 SW Alsatia 09 1832CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Power lines were down across Highway 580 near Alsatia.Showers and thunderstorms developed during the afternoon and evening hours of August 9th. Some of the thunderstormsbrought heavy rain and damaging winds. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Concordia Parish2 W Ferriday2 W Ridgecrest18 0700CST1030CST 0 0 250.00K 0.00K Flash FloodVery heavy rainfall fell during the morning hours as the remnants of Tropical Depression 5 slowly moved across the area.Rainfall totals from 3 to nearly 6 inches occurred around Ferriday and portions of northern Concordia Parish. Flash floodingresulted from the heavy rainfall with many roads and streets under water and eventually closed due to high water. Many homeswere threatened by high water with a few receiving minor flooding.Concordia Parish1 E Clayton 18 0900CST 0 0 0.00K 0.00K Heavy RainConcordia Parish2 SE Concordia Jct2 WNW RidgecrestObserver measured 5.20 inches of rainfall.18 1030CST1550CST 0 0 1.00K 0.00K FloodAfter the rain ended, flooding water remained and surrounded some homes in the Ridgecrest area.Tensas Parish2 SSE Helena 18 1620CST 0 0 0.00K 0.00K Heavy RainJust north of Waterproof, 7.5 inches of rain was measured.Morehouse Parish1 SW Bastrop 19 1700CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Bastrop police department reported some trees blown down around the city.The remnants of Tropical Depression 5 pushed northward over the western portion of the region during the period. This causedsome torrential downpours which produced some flooding over portions of northeast Louisiana. Note: The estimated wind gustof 50 knots is equivalent to 58 mph.West Carroll Parish1 NW Pioneer 22 1621CST 0 0 30.00K 0.00K Thunderstorm Wind (60EG)LOUISIANA, NorthwestNumerous trees and limbs were blown down in the Pioneer Community and surrounding area.The combination of a weak front, strong upper disturbance, and daytime heating, increased instability and brought a round ofsevere storms to the region on the afternoon and evening of August 22. Note: The estimated wind gust of 60 knots isequivalent to 69 mph.Ouachita Parish2 SE Cheniere 05 1520CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Large tree limbs were downed on Hwy. 546 near Cheniere Lake.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ouachita Parish1 SW Monroe 05 1540CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several trees were downed along with power outages in Monroe, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.190

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, NorthwestUnion Parish2 WSW Canbeal 05 1600CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Trees and powerlines were downed on Landfill Road north northeast of Farmerville, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lincoln Parish1 S Henry 05 1615CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Several trees were downed on the northwest side of the parish.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Lincoln Parish2 NE Choudrant 05 1620CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Several trees were downed northeast of Choudrant, Louisiana.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Lincoln Parish1 NW Ruston 05 1700CST 0 0 0.00K 0.00K Thunderstorm Wind (54EG)Numerous trees were downed across the entire parish.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Bienville Parish4 NNE Walsh 05 1715CST 0 0 0.00K 0.00K Thunderstorm Wind (54EG)Multiple trees downed along Hwy. 507 northeast of Bienville, Louisiana.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Bienville Parish3 NE Mt Olive 05 1735CST 0 0 0.00K 0.00K Thunderstorm Wind (54EG)Multiple trees and power lines downed on Hwy. 127 near Mount Olive.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Bienville Parish3 NE Mt Olive 05 1745CST 0 0 15.00K 0.00K Thunderstorm Wind (53EG)An 18 wheeler ran into a downed tree on Hwy. 147 causing considerable damage to the truck. There were no injuries reported.Triple digit afternoon temperatures and a moist atmosphere resulted in a very unstable airmass across northern Louisiana duringthe afternoon and evening hours of August 5th. Storms developed during the heating of the day and these storms producestrong and damaging wind gusts that downed trees and powerlines across portions of the region. Note: The estimated wind gustof 53 knots is equivalent to 61 mph.Bossier Parish1 SW Benton 06 1322CST 0 0 3.00K 0.00K LightningThe local Dairy Queen and Sonic restaurants in Benton were struck by lightning. Damage was determined to be fairly minimal.Bossier Parish1 SW Benton 06 1324CST 0 0 0.00K 0.00K Hail (0.75)Penny sized hail was reported at the Brookshires grocery storm on Hwy. 3 in Benton, Louisiana.Caddo Parish1 NW Norton 06 1420CST 0 0 20.00K 0.00K LightningLightning hit a home at the intersection of Ascension Circle and St. Tammany Court in southeast Shreveport. The lightningstrike resulted in a fire that took about one half hour to contain.191

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, NorthwestA very tropical like airmass resided across the four state region during the afternoon and evening hours of August 6th. A weakfrontal boundary was stalled across northern Texas into southern Arkansas. This combined with a weak disturbance aloft toproduce showers and thunderstorms in a very unstable environment. Storms that developed were prolific lightning producersand as they decayed, produced strong and damaging wind gusts along with some small hail.LAZ002LAZ004Bossier14 1400CST 1 0 0.00K 0.00K Excessive HeatA large ridge of high pressure both at the surface and aloft allowed for excessively hot temperatures across northwest Louisianathrough much of August. Daily afternoon temperatures often climbed above 100 degrees with heat index values climbingbetween 105 to 110 degrees in the afternoon. F87PHClaiborne15 1400CST 1 0 0.00K 0.00K Excessive HeatA large ridge of high pressure both at the surface and aloft allowed for excessively hot temperatures across northwest Louisianathrough much of August. Daily afternoon temperatures often climbed above 100 degrees with heat index values climbingbetween 105 to 110 degrees in the afternoon. M64PHOuachita Parish1 SW Lakeshore 16 1255CST 0 0 60.00K 0.00K Thunderstorm Wind (54EG)Trees were downed on 2 homes and nearby powerlines on the 200 block of Malvern Street in South Monroe. One home washeavily damaged as the tree crashed through the roof. There were no report of injuries.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Ouachita Parish1 ENE Steven 16 1305CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A tree was downed on New Natchitoches Road in West Monroe.Several strong to severe thunderstorms developed across northwest and north central Louisiana during the afternoon and earlyevening hours of August 16th. These storms developed behind a nearly stationary frontal boundary and were moving fromnortheast to southwest across the northern half of the state. A weak shear axis existed across the state at that time and thestorms developed in a moderately unstable airmass. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.LAZ002Bossier16 1400CST 2 0 0.00K 0.00K Excessive HeatA large ridge of high pressure both at the surface and aloft allowed for excessively hot temperatures across northwest Louisianathrough much of August. Daily afternoon temperatures often climbed above 100 degrees with heat index values climbingbetween 105 to 110 degrees in the afternoon. M58PHLa Salle ParishOlla Arpt 16 1427CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A tree was downed on Slay Road just east of Olla, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.La Salle Parish2 NW Rhinehart 16 1446CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A tree was downed on Hwy. 460 east southeast of Jena, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Natchitoches Parish1 WSW Natchitoches 16 1537CST 0 0 0.00K 0.00K Thunderstorm Wind (51EG)Several large tree limbs were downed on the 300 block of Fifth Street. Powerlines were also downed in town. Trees were alsoreported downed near Cloutierville, Chopin and Campti, Louisiana.Note: The estimated wind gust of 51 knots is equivalent to 59 mph.192

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, NorthwestCaddo ParishShreveport 16 1615CST 0 0 0.00K 0.00K Thunderstorm Wind (51EG)A tree was downed into powerlines on Ellerbe Road near Flournoy Lucas Road in southeast Shreveport.Note: The estimated wind gust of 51 knots is equivalent to 59 mph.Caddo Parish1 NE Shipp 16 1654CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)A home weather station measured a wind gust to 59 mph just west of Blanchard, Louisiana.Several strong to severe thunderstorms developed across northwest and north central Louisiana during the afternoon and earlyevening hours of August 16th. These storms developed behind a nearly stationary frontal boundary and were moving fromnortheast to southwest across the northern half of the state. A weak shear axis existed across the state at that time and thestorms developed in a moderately unstable airmass. Note: The measured wind gust of 51 knots is equivalent to 59 mph.Union Parish2 NNW Rum Center 22 1705CST 0 0 0.00K 0.00K Thunderstorm Wind (54EG)Numerous trees were downed near Rum Center east southeast of Junction City, Louisiana.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Union Parish1 S Conway 22 1710CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Trees were downed near Conway.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Union Parish2 WSW Cooley 22 1725CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Trees were downed north of Bernice, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Claiborne Parish1 E Corney Lake 22 1728CST 0 0 0.00K 0.00K Thunderstorm Wind (51EG)Trees and powerlines were downed in the Weldon, Louisiana community.Note: The estimated wind gust of 51 knots is equivalent to 59 mph.Claiborne Parish4 ESE Mahan 22 1730CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Trees were downed near Antioch, Louisiana.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Claiborne Parish2 NE Lisbon 22 1740CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several trees were downed northeast of Lisbon, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Union Parish2 SW Bernice 22 1740CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Trees were downed near Hwy. 167.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Claiborne Parish1 W Athens 22 1900CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Trees were downed near Athens, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.193

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, NorthwestBienville ParishArcadia 22 1910CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Large tree limbs were downed along with power outages reported in Arcadia, Louisiana.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bossier Parish2 SE Bolinger 22 1910CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Trees and powerlines were downed east of Plain Dealing, Louisiana.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Webster Parish1 E Springhill 22 1910CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Trees and powerlines were downed in Springhill, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Bossier Parish1 S Plain Dealing 22 1915CST 0 0 10.00K 0.00K LightningLightning started a small fire when it hit a house on Hwy. 3 near Plain Dealing. There were no injuries reported.Bossier Parish2 N Rocky Mt 22 1920CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Trees and powerlines were downed in Rocky Mount, Louisiana.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Bossier Parish1 SW Benton 22 1950CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Trees were downed along with a fence with iron posts that were bent over.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Bossier Parish2 NE Curtis 22 2015CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Winds were estimated near 60 mph approximately 5 miles south southeast of Bossier City, Louisiana.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Webster Parish1 S Doyline 22 2023CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)LOUISIANA, SoutheastTrees were uprooted in Doyline, Louisiana.Severe thunderstorms developed during the heating of the day across Southwest Arkansas into Northwest Louisiana. Thisactivity developed ahead of a frontal boundary that was pulled up nearly stationary across central Arkansas. Afternoontemperatures were between 100 and 105 degrees so instability was excessive across the region. Note: The estimated wind gustof 52 knots is equivalent to 60 mph.LAZ061-069Lower Plaquemines - Upper Jefferson01021100CST1200CST 1 0 90.0K 0.00K Excessive HeatHot and humid weather produced high temperatures near 100 degrees and heat index values near 110 degrees in portions ofsoutheast Louisiana.Tangipahoa ParishHammond Muni Arpt 04 2000CST 0 0 10.00K 0.00K Thunderstorm Wind (60EG)Thunderstorm winds flipped one airplane. An awning was torn from the terminal building which ripped off an attic vent andleft a hole in the roof. This allowed rain water to damage a meeting room.194

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, SoutheastThunderstorms moving southward across southeast Louisiana produced damaging winds at Hammond Airport. Note: Theestimated wind gust of 60 knots is equivalent to 69 mph.East Baton Rouge Parish1 SSE Istrouma 05 0815CST0915CST 0 0 0.00K 0.00K Flash FloodHeavy rain flooded Wooddale Avenue with flood water entering a food market.Thunderstorms produced heavy rain resulting in minor flooding in the Baton Rouge area.Livingston Parish8 W Killian 05 0830CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Trees were downed by thunderstorm winds on Highway 444 between Highway 63 and Bull Run Road.A thunderstorm produced minor damage over southeast Louisiana. Note: The estimated wind gust of 52 knots is equivalent to60 mph.Jefferson ParishMetairie 12 0430CST0530CST 0 0 10.00K 0.00K Flash FloodWater intruded into the first floor of an apartment comlex in southeast Metairie near Ochsner Medical Center. There were alsoseveral flooded streets in Bridge City.A slow moving thunderstorms associated with the remnant circulation of Tropical Depression 5 produced produced heavy rainacross Metro New Orleans and some flooding in the Metairie area.East Baton Rouge Parish1 ENE Baker 13 0600CST 0 0 20.00K 0.00K LightningLightning caused electrical damage to a home, and knocked down a tree which fell onto an automobile and a home in Baker.Lightning caused damage to a home and knocked a tree onto an automobile and a home in East Baton Rouge Parish.Tangipahoa ParishHammond1 ESE Robert13 0955CST1100CST 0 0 0.00K 0.00K Flash FloodFive inches of rain from the remnants of Tropical Depression Five flooded yards and approached homes near Hammond HighSchool east of Hammond.Over five inches of rain from the remnants of Tropical Depression Five produced flooding over portions of southeast Louisiana.Tangipahoa ParishHammond 16 2000CST 0 0 10.00K 0.00K LightningLightning downed several trees and triggered power outages in Hammond, and between Tickfaw and Independence.Lightning from scattered thunderstorms damaged several trees in Tangipahoa Parish.East Baton Rouge Parish1 NE Maryland1 NNE University17 1600CST1700CST 0 0 0.00K 0.00K Flash FloodSeveral reports of street flooding were received in Baton Rouge.Pointe Coupee Parish1 NW New Roads 17 1730CST1830CST 0 0 0.00K 0.00K Flash FloodA trained spotter reported that a house was taking on water on Napoleon Street in New Roads.195

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, SoutheastPointe Coupee Parish1 NW New Roads 17 1900CST2000CST 0 0 0.00K 0.00K Flash FloodPointe Coupee Law Enforcement reported ongoing street flooding and water in homes along several local streets, includingNew Roads Street...Louisiana Street...Richey Street...Janis Street and Berthier Street.Pointe Coupee Parish2 E Wickliffe 17 1900CST 0 0 20.00K 0.00K LightningPointe Coupee Law Enforcement reported a home on fire on Cooks Landing Drive in Ventress due to lightning.Pointe Coupee ParishMorganza1 N ArgyleWest Feliciana ParishSt Francisville3 SSW RiddleSlow moving thunderstorms associated with Tropical Depression Five produced flooding in Pointe Coupee and East BatonRouge Parishes.18 1325CST1430CST 0 0 0.00K 0.00K Flash FloodLouisiana Highway 10 was flooded near Morganza.18 1334CST1430CST 0 0 0.00K 0.00K Flash FloodLow water bridges were flooded in rural areas near St. Francisville.Slow moving thunderstorms associated with the remnant circulation of Tropical Depression Five produced heavy rainfall.Several reports of flash flooding in southeast Louisiana occurred during during the afternoon hours. This was the secondpassage of the remnant circulation of Tropical Depression 5 across the region.Tangipahoa ParishHammond1 S Natalbany19 1700CST1800CST 0 0 0.00K 0.00K Flash FloodThunderstorms produced street flooding in several areas of Hammond and surrounding portions of Tangipahoa Parish.Slow moving thunderstorms triggered minor flooding in several areas of Tangipahoa Parish.Terrebonne Parish4 W Boudreaux 20 1300CST 0 0 40.00K 0.00K LightningLightning sparked a fire that caused major damage to the second story of a home in Dularge.Lightning triggered a fire that damaged a home in Terrebonne Parish.Livingston Parish2 SE Port Vincent 23 1621CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)St. Charles ParishGood Hope1 ESE Mimosa ParkA few trees were reported down with one onto a shed and another onto a carport. Report was relayed by a Baton Rouge TVstation. Event time was estimated by radar.A strong thunderstorm produced wind damage in the Baton Rouge area. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.29 0405CST0600CST 0 0 20.00K 0.00K Flash FloodSeven inches of rain produced flooding of five homes in Des Allemands, Bayou Gauche, Boutte and Paradis.Lafourche ParishMathews2 ENE Cut Off29 1400CST1500CST 0 0 0.00K 0.00K Flash FloodHeavy rain produced flooding in central and southern portions of Lafourche Parish. Several roads were closed by the flooding.196

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, SoutheastSlow moving thunderstorms produced isolated flooding south and west of New Orleans.Jefferson Parish1 S Metairie1 ESE Southport30 1400CST1540CST 0 0 20.00K 0.00K Flash FloodTwo businesses were flooded near Jefferson Highway and Metairie Road.A slow moving thunderstorm produced localized flash flooding in the New Orleans metro area.LOUISIANA, SouthwestJefferson Davis Parish1 N Jennings Arpt 05 1200CST1400CST 0 0 1.00K 0.00K FloodLake Charles American Press reported widespread street flooding throughout the city of Jennings due to heavy rainfall fromafternoon thunderstorms.Beauregard Parish4 NNE Dry Creek 05 1310CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Beauregard Parish Sheriff Office reported a tree was blown down along Highway 113 between Sugartown and Dry Creek.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Beauregard Parish1 NNW Dry Creek 05 1325CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Beauregard Parish Sheriff Office reported a tree was blown down on Joe Gray Road near Dry Creek.Clusters of strong to severe thunderstorms moved across southwest Louisiana throughout the day on August 5, producingseveral reports of wind damage and flooding. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson Davis Parish2 S Jennings 13 1415CST 0 0 250.00K 0.00K LightningKPLC-TV and Jennings Daily News reported lightning struck three large oil storage tanks at the intersection of Highway 26and Highway 1126 south of Jennings and set them on fire. Three fire departments responded and put out the blaze.Scattered thunderstorms across southwest Louisiana during the afternoon hours on August 13 produced a lightning strike thatstarted a large oil fire in Jefferson Davis Parish.Iberia Parish2 NNW Patoutville 16 0500CST 0 0 200.00K 0.00K LightningDaily Iberian newspaper and Iberia Parish Sheriff Office reported lightning struck a home on College Road near US 90 inGrand Marais, burning the house to the ground.A cluster of strong thunderstorms that developed across south central Louisiana during the early morning hours on August 16produced a lightning strike that caused a house fire in Iberia Parish.Avoyelles Parish2 NW Bunkie3 NE Fifth Ward18 0000CST1600CST 0 0 750.00K 0.00K Flash FloodThe remnants of Tropical Depression Five stalled across Avoyelles Parish on August 18, causing nearly sixteen hours of heavyrainfall. The resulting rainfall totals of up to 15 inches resulted in widespread flash flooding throughout the parish, with a totalof 25 homes and 15 business reportedly flooded.Homes seeing flooding included apartments on Tony Roy Road in Mansura, several homes along Highway 114 betweenMansura and Hessmer, and a duplex in Simmesport. A woman had to be rescued from her flooded home on Large Road inMansura. Businesses receiving flooding included KLIL radio station in Moreauville, Poret Drug Store in Cottonport, BunkieRecord Newspaper in Bunkie, and all 7 businesses on Main Street in Bunkie.197

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LOUISIANA, SouthwestRoadway closures included Highway 114, Leglise Street, Tony Road, Large Road, Merrick Street, and St. Jean Street inMansura; and Highway 107 in Plaucheville. Six to seven vehicles stalled in high water along Highway 114 between Mansuraand Hessmer, and other vehicles reportedly became stranded in flood waters on Large Road and Schexnyder Road in Mansura,and Little River Road in Spring Bayou.Avoyelles Parish1 WNW Bunkie 18 0000CST1450CST 0 0 0.00K 0.00K Heavy RainA rainfall total of 9.55 inches was measured at the Bunkie Water Plant.Avoyelles Parish2 E Moncla 18 0900CST 0 0 1.00K 0.00K LightningMarksville Weekly News reported three head of cattle were struck by lightning and killed in a field on Johnson Road north ofMarksville.Avoyelles Parish3 SE Moncla 19 1500CST 0 0 150.00K 0.00K LightningMarksville Weekly News reported a house at 1556 Highway 1192 was struck by lightning and destroyed. Three firedepartments responded to fight the fire.The remnant circulation of Tropical Depression 5 moved northwest into Avoyelles Parish and stalled during the early morninghours on August 18. Nocturnal convection exploded in coverage near the circulation center, and continued throughout much ofthe day, resulting in widespread flash flooding across Avoyelles Parish. Radar estimated as much as 15 inches of rain fell onAugust 18 between midnight and 4 PM CDT across western and central portions of the parish. Estimates from local media andthe Red Cross indicate a total of 25 homes and 15 businesses were flooded, mainly in the Mansura, Hessmer, Marksville, andBunkie areas.In addition to the flooding, lightning struck and killed three heads of cattle on August 18 and destroyed a house on August 19.Lafayette Parish1 WSW Pitette 23 0111CST 0 0 150.00K 0.00K LightningLafayette Daily Advertiser reported that scattered thunderstorms which occurred in the early morning hours on August 23produced lightning which struck and destroyed a home on Timberwood Circle in Lafayette.Cameron Parish4 SE Grand Chenier Arpt 23 0240CST 0 0 0.00K 10.00K LightningRapides Parish2 WNW Weil1 W (AEX)England Afb AlxLake Charles American Press reported that scattered thunderstorms which occurred in the early morning hours on August 23produced lightning which struck marsh land in Rockefeller National Wildlife Refuge and created a large marsh fire. Smokefrom the fire affected the Sulphur and Carlyss areas.Scattered thunderstorms associated with the remnants of Tropical Depression Five produced lightning which struck anddestroyed a home in Lafayette.29 0200CST0600CST 0 0 25.00K 0.00K Flash FloodRapides Parish Emergency Management reported 5 homes were flooded on Cooper Road and Schoolhouse Road west ofAlexandria International Airport, with Bayou Rapides Road, Cooper Road, and Schoolhouse Road reportedly underwater.Several of the flooded homes received sandbags for protection from floodwaters. The Alexandria Airport ASOS measured 2.83inches of rain in one hour between 516 AM CDT and 616 AM CDT, and a rainfall total of 5.28 inches.Thunderstorms repeatedly developing and moving across the same areas of western Rapides Parish caused flash flooding nearthe Alexandria International Airport. Five homes were reportedly flooded.198

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MAINE, SouthYork County2 SSE East Lebanon 09 1700EST1705EST 0 6 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm downed several trees in a campground near Lebanon. One of the trees landed on a tent and car resultingin 6 injuries.An isolated severe thunderstorm moved into western York County during the evening producing high winds which broughtdown several trees in a campground. One of the trees landed on a car and tent resulting in 6 injuries, one of which was serious.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Somerset County3 NE New Portland 10 1605EST1609EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm downed trees and wires on River Road near New Portland.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Somerset CountyMadison 10 1625EST1629EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm downed trees and wires on Main Street in Madison.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Kennebec County2 NNW Clinton 10 1705EST1710EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm downed trees on Horseback Road near Clinton.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Waldo County3 ENE Burnham 10 1708EST1711EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)MARYLAND, CentralA severe thunderstorm downed trees in the vicinity of Johnson Flat Road and Route 100 near Burnham.A cold front moving through northern New England produced scattered convection across northern and central Maine. A few ofthese thunderstorm cells became severe and produced mainly wind damage. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.Allegany County1 NNE Luke 04 1655EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down in Westernport.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany County1 N Midland 04 1655EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down in Midland.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany CountyBarton 04 1655EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down in Barton.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.199

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, CentralAllegany CountyDetmold 04 1656EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down in Lonaconing.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany CountyNational 04 1658EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down near Midlothian.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany CountyMidland 04 1700EST 0 0 3.00K Thunderstorm Wind (56EG)Six trees were down on Route 36.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany CountyFrostburg 04 1702EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down in Frostburg.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany CountyMt Savage 04 1705EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down in Mount Savage.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany County1 SSW Cresaptown 04 1707EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down in Cresaptown.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany County1 WSW Cumberland 04 1710EST 0 0 Thunderstorm Wind (68MG)A wind gust of 78 mph was measured near Ridgeley.Note: The measured wind gust of 68 knots is equivalent to 78 mph.Allegany County1 N Alleghany Grove 04 1711EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down in LaVale.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany County1 SSW Long 04 1712EST 0 0 3.00K Thunderstorm Wind (56EG)Trees were down along Klosterman Avenue in LaVale.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Allegany CountyCumberland 04 1715EST 0 0 5.00K Thunderstorm Wind (56EG)Numerous trees were down in Cumberland.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Carroll County1 ESE Linwood 04 1914EST 0 0 0.50K Thunderstorm Wind (52EG)A tree was down on Watson Lane near Pipe Creek Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.200

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, CentralCarroll County1 ESE New Windsor 04 1920EST 0 0 0.50K Thunderstorm Wind (52EG)A tree was down on Rome Road.High pressure over the Atlantic Ocean continued to pump in hot and humid air over the Mid-Atlantic. A series of upper-leveldisturbances in the jet stream passed through Maryland triggering showers and thunderstorms during this time. There wasenough instability from the hot and humid air for some thunderstorms to contain damaging winds during the afternoon andevening hours. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Prince George's County1 NE Oxon Hill 05 1446EST 0 0 2.00K Thunderstorm Wind (70EG)Trees were down on Commanche Drive.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Prince George's County1 SSE Forest Hgts 05 1448EST 0 0 20.00K Thunderstorm Wind (70EG)A large tree fell into a home on Ottawa street in Forest Heights. Four people had to be rescued from the home. One person wastransported to the hospital.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Prince George's CountyOxon Hill 05 1450EST 0 0 5.00K Thunderstorm Wind (70EG)Numerous trees were broken off and uprooted within a five block radius in the Southlawn Neighborhood.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Prince George's County1 ENE Piscataway 05 1453EST 0 0 15.00K Thunderstorm Wind (61EG)A tree fell onto a vehicle on Floral Park Drive. One person was injured.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Calvert CountyDunkirk 05 1519EST 0 0 10.00K Thunderstorm Wind (56EG)Numerous trees were down throughout the Dunkirk area.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Calvert County1 W Chaney 05 1519EST 0 0 5.00K Thunderstorm Wind (52EG)Trees were down along Chaney Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Calvert County1 ESE Dunkirk 05 1520EST 0 0 5.00K Thunderstorm Wind (61EG)Large trees and limbs were snapped or uprooted along Appleway and also along side streets.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Charles County1 SSE Cobb Is 05 1622EST 0 0 2.00K Thunderstorm Wind (52EG)Trees were down on Cobb Island.A hot and humid air mass remained over Maryland on the 5th. A series of upper-level disturbances in a zonal flow passedthrough the Mid-Atlantic during this time. Showers and thunderstorms developed during the afternoon and evening hours.There was enough instability from the hot and humid air mass for some thunderstorms to contain damaging winds. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.Frederick County2 ENE Braddock Hgts 12 0447EST 0 0 1.00K Thunderstorm Wind (50EG)A tree was down along Old Receiver Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.201

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, CentralFrederick County1 NE Reels Mill 12 0504EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down along Reichs Ford Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Montgomery County1 S Purdum 12 0515EST 0 0 1.00K Thunderstorm Wind (52EG)Several eight inch tree limbs were down due to thunderstorm winds near Damascus.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Frederick County3 WSW Fountain Mills 12 0522EST 0 0 5.00K Thunderstorm Wind (61EG)Numerous trees were down along Routes 80 and 75.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Frederick County1 S Monrovia 12 0522EST 0 0 15.00K Thunderstorm Wind (61EG)Structures were damaged at a drag racing facility near Green Valley.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Frederick CountyUrbana 12 0524EST 0 0 5.00K Thunderstorm Wind (61EG)Trees were down near Urbana.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Montgomery CountyDamascus 12 0525EST 0 0 Thunderstorm Wind (52EG)A wind gust of 60 mph was estimated by a National Weather Service employee near Damascus.A backdoor cold front stalled out over the region on the 12th while and upper-level disturbance passed through the area. A hotand humid air mass ahead of the cold front produced moderate amounts of instability. Some thunderstorms that developed wereable to produce damaging wind and large hail. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Montgomery County1 SE Cedar Grove 12 0530EST0630EST 0 0 0.00K 0.00K Flash FloodMeasured rainfall of 2.5 inches in 30 minutes resulted in Kings Valley Road being closed, due to 18 inches of water flowingacross the road.A northwest to southeast oriented cold front drifted into the area as an upper level disturbance moved southeast across theregion. Thunderstorms initiated along the boundary during the morning, producing torrential downpours northern parts of theWashington metropolitan area. Rainfall amounts of 2 to 4 inches in under 3 hours were enough to produce flash flooding.Additional thunderstorms developed in the evening over saturated ground in the Baltimore metropolitan area, resulting in moreflash flooding.Montgomery County1 WNW Montgomery Vlg 12 0553EST 0 0 Thunderstorm Wind (50MG)A wind gust of 58 mph was measured at Montgomery Village.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Montgomery County1 SE Clopper 12 0555EST 0 0 25.00K Thunderstorm Wind (66EG)A tree fell into the Garden Apartments. The tree was eighty feet in diameter.Note: The estimated wind gust of 66 knots is equivalent to 76 mph.202

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, CentralMontgomery County1 NNW Gaithersburg 12 0558EST 0 0 5.00K Thunderstorm Wind (70EG)Numerous trees and branches were down, including a snapped large Oak Tree and an uprooted Pine Tree.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Montgomery County1 NNE Gaithersburg 12 0600EST 0 0 7.00K Thunderstorm Wind (78EG)Widespread damage to trees was reported in the vicinity of Old Towne Avenue in Gaithersburg.Note: The estimated wind gust of 78 knots is equivalent to 90 mph.Montgomery County1 SW Spencerville 12 0605EST 0 0 1.00K Thunderstorm Wind (50EG)Small trees were down near Spencerville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Montgomery CountyWheaton Hills 12 0615EST 0 0 Hail (1.00)Quarter size hail was reported near Glenmont.Montgomery County1 N White Oak 12 0622EST 0 0 5.00K Thunderstorm Wind (61EG)Tree damage was reported between Northwest Drive and Prelude Drive along US-29.A backdoor cold front stalled out over the region on the 12th while and upper-level disturbance passed through the area. A hotand humid air mass ahead of the cold front produced moderate amounts of instability. Some thunderstorms that developed wereable to produce damaging wind and large hail. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Prince George's County1 S Ammendale 12 0636EST0736EST 0 0 0.00K 0.00K Flash FloodRoute 1 at Lincoln Avenue was closed in both directions as a result of high water. A rainfall total was reported from near thearea of 3.51 inches.Prince George's CountyBranchville 12 0642EST0742EST 0 0 10.00K 0.00K Flash FloodPrince Georges County Fire Department reported cars stranded in College Park from flash flooding. A rain gauge in the areaobserved 3.56 inches of rain.A northwest to southeast oriented cold front drifted into the area as an upper level disturbance moved southeast across theregion. Thunderstorms initiated along the boundary during the morning, producing torrential downpours northern parts of theWashington metropolitan area. Rainfall amounts of 2 to 4 inches in under 3 hours were enough to produce flash flooding.Additional thunderstorms developed in the evening over saturated ground in the Baltimore metropolitan area, resulting in moreflash flooding.Prince George's County3 SSE Meadows 12 0709EST 0 0 Hail (1.75)Golf ball size hail was reported near Andrews Airforce Base.Prince George's County3 SSE Meadows 12 0709EST 0 0 5.00K Thunderstorm Wind (61EG)Large sections of trees were blown down and shutters were blown off from a residence near Andrews Airforce Base.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.203

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, CentralPrince George's County2 WSW Ashbox 12 0721EST 0 0 1.00K Thunderstorm Wind (52EG)Large limbs were blown down just off of Cedarville Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Prince George's CountyAshbox 12 0725EST 0 0 0.50K Thunderstorm Wind (52EG)A large limb was blown down on Brandywine Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Washington County1 S (HGR)Hagerstown Rgnl 12 1521EST 0 0 Thunderstorm Wind (50MG)A wind gust of 50 knots was reported at the Hagerstown Airport.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Carroll County1 NNW Keymar 12 1547EST 0 0 5.00K Thunderstorm Wind (56EG)Trees and wires were down near Keymar.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Frederick County2 NNE Johnsville 12 1547EST 0 0 2.00K Thunderstorm Wind (52EG)Large limbs were down along Beaver Dam Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Carroll CountyBark Hill 12 1548EST 0 0 2.00K Thunderstorm Wind (52EG)Trees and wires were down anear Linwood.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Carroll County1 SE Mc Kinstrys 12 1550EST 0 0 5.00K Thunderstorm Wind (56EG)Trees and wires were down anear Linwood.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Frederick County2 ENE Unionville 12 1550EST 0 0 5.00K Thunderstorm Wind (61EG)Several trees and wires were down. Most of the trees were six inches in diameter.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Carroll County2 WSW New Windsor 12 1552EST 0 0 5.00K Thunderstorm Wind (56EG)Several trees and wires were down near New Windsor.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Frederick CountyUnionville 12 1558EST 0 0 5.00K Thunderstorm Wind (61EG)Trees were down in Unionville.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Frederick County3 S Unionville 12 1603EST1604EST 0.24 440 0 0 15.00KTornado (EF0)Numerous trees were uprooted and large limbs were snapped. The damage to trees and debris showed a convergent and weaklyrotational pattern which suggests there was a weak tornado near and just north of Westvale Court.204

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, CentralFrederick County2 E New London 12 1613EST 0 0 1.00K Thunderstorm Wind (56EG)Smaller branches were blown down due to thunderstorm winds. A flag pole was bent at its base on Charles Drive.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Frederick County2 E New London 12 1613EST 0 0 1.00K Thunderstorm Wind (56EG)A tree was down on Old Annapolis Road near Charles Drive.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Frederick County1 NE Plane Number Four 12 1614EST 0 0 10.00K Thunderstorm Wind (61EG)Numerous large trees were blown down along and across Woodville Road and also near the intersection of Woodville Road andOld Annapolis Road.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Frederick County2 NNE Plane Number Four 12 1615EST 0 0 5.00K Thunderstorm Wind (70EG)Several trees were topped in thunderstorm winds along Amys Terrace.A backdoor cold front stalled out over the region on the 12th while and upper-level disturbance passed through the area. A hotand humid air mass ahead of the cold front produced moderate amounts of instability. Some thunderstorms that developed wereable to produce damaging wind and large hail. Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Harford County1 SW Van Bibber 12 1904EST2004EST 0 0 0.00K 0.00K Flash FloodWater rescue at railroad underpass on Maryland Route 755. Rainfall in the area measured 2.22 inches.Anne Arundel County1 SW Marley 12 2248EST2348EST 0 0 0.00K 0.00K Flash FloodHigh water was reported on Norfolk Road.A northwest to southeast oriented cold front drifted into the area as an upper level disturbance moved southeast across theregion. Thunderstorms initiated along the boundary during the morning, producing torrential downpours northern parts of theWashington metropolitan area. Rainfall amounts of 2 to 4 inches in under 3 hours were enough to produce flash flooding.Additional thunderstorms developed in the evening over saturated ground in the Baltimore metropolitan area, resulting in moreflash flooding.Frederick County1 S Loys 16 1530EST 0 0 5.00K Thunderstorm Wind (61EG)Uprooted and snapped trees along with large limb damage were reported near Rocky Ridge.A surface trough triggered some showers and thunderstorms over Maryland. An isolated thunderstorm did produce damagingwinds due to moderate amounts of instability ahead of the trough. Note: The estimated wind gust of 61 knots is equivalent to70 mph.Montgomery County1 N Somerset 18 0655EST0755EST 0 0 0.00K 0.00K FloodLittle Falls Parkway was flooded between Massachusetts Avenue and River Road. A rain gauge in the area tallied 3.84 inches.Anne Arundel County1 SSE Revell1 NNE Sherwood Forest18 0705EST0805EST 0 0 0.00K 0.00K FloodFlooding was reported at the intersection of Route 2 and College Parkway. Rainfall in the area was measured at 3.75 inches.205

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, CentralPrince George's County1 SW Ammendale 18 0714EST0814EST 0 0 0.00K 0.00K FloodPortions of US Route 1 were flooded between Powder Mill and Ammendale Road. A storm spotter near the region observed3.58 inches of rain.Anne Arundel County1 N Severna Park1 SSW Earleigh Hgts18 0847EST0947EST 0 0 0.00K 0.00K FloodA portion of Ritchie Highway was flooded near Whites Road. A rain gauge in the area measured 3.86 inches.Prince George's County1 SE Oak Crest 18 0857EST0957EST 0 0 0.00K 0.00K FloodBrockbridge Road was flooded near Maryland City Park. A rain gauge in the area measured 4.60 inches.Montgomery County1 SE Woodhaven 18 1008EST1108EST 0 0 0.00K 0.00K FloodBradley Blvd. at Huntington Pkwy. was flooded. A rainfall total from the area was reported to be 4.47 inches.Low pressure moved west to east along a stationary boundary draped across Maryland. Thunderstorms associated with this lowpressure produced very high rainfall rates with the aide of a moisture laden atmosphere. Flooding occurred across northernportions of the Washington metropolitan area during the morning from rainfall amounts of 3 to 4 inches in less than 3 hours.MARYLAND, NortheastTalbot CountySt MichaelsTrappe05 1545EST1615EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A squall line of severe thunderstorms knocked down trees and wires in multiple areas across the southwestern half of TalbotCounty from Saint Michaels through Royal Oak and Trappe. A wind gust of 55 mph was measured in Royal Oak.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Caroline CountyFederalsburg 05 1630EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm knocked down a tree and several large tree limbs in Federalsburg.The northern edge of a squall line of severe thunderstorms affected Talbot and Caroline Counties during the late afternoon ofthe 5th. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.MDZ008-012-015-019-020Caroline - Cecil - Kent - Queen Anne`s - Talbot10 0900EST1900EST 0 0 0.00K 0.00K HeatA three day heat wave for most places from the 9th through the 11th produced high temperatures in the mid to upper 90s andafternoon heat indices of around 105F on the 10th along the Maryland Eastern Shore. A pair of backdoor cold fronts ended thehot weather on the 12th. While there was a heat wave during the last couple of days in August (with some places recording thehighest temperatures of the month then), the 10th was the last time during 2010 that heat indices reached that high. Actualhighest temperatures for the 10th and 11th included 97 degrees at the Baltimore-Washington International Airport andSalisbury (Wicomico County) and 95 degrees at Tolchester Beach (Kent County) and Easton (Talbot County).August did not crack the top ten warmest, but the summer of 2010 was the warmest meteorological summer on record since1895 for the state of Maryland with an average temperature of 76.3 degrees.206

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, NortheastTalbot CountyTilghman 12 0739EST 0 0 5.00K 0.00K Thunderstorm Wind (55MG)A severe thunderstorm knocked down several trees and caused cosmetic and isolated roof damage to homes on TilghmanIsland.Note: The measured wind gust of 55 knots is equivalent to 63 mph.Talbot CountyTilghman 12 0800EST 0 0 5.30K 0.00K LightningLightning struck a home on Bay Front Drive on Tilghman Island and started a fire on the morning of the 12th. It tookfirefighters about 20 minutes to extinguish the blaze. Damage was estimated at $5,300. The thunderstorm complex was aprolific lightning producer through Maryland. Lightning rates as it moved across the Eastern Shore were around 1,000 cloud-togroundstrokes per hour. About 800 homes and businesses lost power in Talbot County. Outages were reported on TilghmanIsland in Tilghman, Sherwood and Wittman. Other outages in Talbot County were reported in Saint Michaels, Neavitt, Bozmanand Trappe. All power was restored by 4 pm EDT on the afternoon of the 12th.A complex of showers and thunderstorms with damaging winds and frequent lightning moved along a stationary frontalboundary on the morning of the 12th through the lower Delmarva Peninsula.MARYLAND, SouthDorchester County1 NE Cornersville 05 1555EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Power poles and power lines were downed on Twin Point Cove Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wicomico County1 NW Allen 05 1710EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Large tree was downed on a house.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Somerset CountyWenona 05 1715EST 0 0 1.00K 0.00K Thunderstorm Wind (58MG)Wind gust of 58 knots (67 mph) was measured at Deal Island CWOP site.Note: The measured wind gust of 58 knots is equivalent to 67 mph.Somerset County1 E Princess Anne 05 1800EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were downed on Warwick Lane.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Worcester County1 N Berlin 05 1800EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large tree limbs were downed.Scattered severe thunderstorms well in advance of a cold front produced damaging winds across portions of the LowerMaryland Eastern Shore. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Dorchester County1 S Bucktown 12 0810EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Power lines were downed which caused power outages in Bucktown.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Somerset CountyMt Vernon 12 0840EST 0 0 3.00K 0.00K LightningLightning struck the Mount Vernon Fire Department building which caused the loss of power and communications.207

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MARYLAND, SouthSomerset County1 N Rehobeth 12 0920EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)MARYLAND, WestTrees were downed at the intersection of Rehobeth Road and Coventry Road. Power outages were reported.Scattered severe thunderstorms associated with a cold front produced damaging winds across portions of the Lower MarylandEastern Shore. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Garrett County1 SE Friendsville 04 1630EST 0 0 75.00K 0.00K Thunderstorm Wind (50EG)Emergency management reported numerous trees, power poles and power lines down in Friendsville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Garrett County1 E Accident 04 1635EST 0 0 75.00K 0.00K Thunderstorm Wind (50EG)Emergency management reported numerous trees, power poles and power lines down near Accident.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Garrett County2 NE Thayerville 04 1645EST 0 0 100.00K 0.00K Thunderstorm Wind (50EG)MASSACHUSETTS, Central and EastEmergency management reported numerous trees, power poles and power lines down in and around Deep Creek Lake Park.A mesoscale convective system moved along a boundary situated over east central Ohio, southern Pennsylvania and NorthernWest Virginia. Severe thunderstorms across eastern Ohio, southwest Pennsylvania, northern West Virginia, and Garrett countyMaryland produced widespread wind damage with 50 thousand homes left without power. The counties that were hardest hitwere Belmont and Jefferson counties in Ohio, where numerous large trees blocked roadways and three large radio stationtowers collapsed. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hampden County2 SW Aldenville 05 1341EST1500EST 0 0 3.00K 0.00K FloodTwo cars were stuck in flood waters on Chicopee Street with water overflowing the floorboards of the cars.Essex County1 W LynnLynn Common05 1516EST1600EST 0 0 7.00K 0.00K FloodIn Lynn, four cars were stuck in flood waters at Commercial and Bennett Streets. Pope Street in Salem was closed due toflooding.Norfolk County1 W Brookline1 NNW Wellesley Farms05 1537EST1609EST 0 0 0.00K 0.00K FloodPortions of Route 9 (Boylston Street) were flooded with up to three feet of water. Newton and South Streets and Clark Roadwere impassable due to flooding.Suffolk County2 ENE South Boston 05 1557EST 1 0 0.00K 0.00K LightningA 50 year old man was struck by lightning while walking in an area known as the Sugar Bowl in South Boston. Lightningstruck him in the head, passing through his back and exiting his feet. He collapsed in cardiac arrest and was revived andhospitalized for several days before dying from his injuries. M50OU208

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MASSACHUSETTS, Central and EastPlymouth County1 NW Hingham 05 1618EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Wires on Hersey Street were downed by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Plymouth County1 S Scituate 05 1627EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Several trees were downed by thunderstorm winds throughout Scituate.A cold front moved through the area producing thunderstorms and heavy rain across Southern New England. Note: Theestimated wind gust of 50 knots is equivalent to 58 mph.Hampshire CountyMiddlefield 16 1323EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A six to eight inch diameter tree on Skyline Trail was downed by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hampshire CountyMiddlefield 16 1345EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Hampshire CountyEasthamptonWesthamptonTrees on Town Hill Road were downed by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.16 1403EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Several trees were downed, including one on Pisgah Road in Easthampton.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hampden County1 SW North Wilbraham 16 1428EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A tree and wires on Lake Drive were downed by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hampden County1 S (CEF)Westovr Afb Chi 16 1429EST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)The Automated Weather Observing System at Westover Air Force Base in Chicopee, MA (KCEF) recorded a wind gust of 59mph. No damage was reported.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Hampshire County1 W Bay State 16 1434EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Wires on Locust Street between Pine and Main Streets were downed by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Worcester CountySouth Worcester 16 1545EST 0 0 10.00K 0.00K LightningLightning struck a building on Gold Street, blowing out the electrical panels of the building and starting a small fire.A warm front moved northward through Southern New England during the morning hours, bringing a warm, moist airmassover the area. Then a cold front swept across during the afternoon, producing showers and thunderstorms over much of thearea.MAZ022Barnstable23 1912EST2101EST 0 0 20.0K 0.00K Strong Wind209

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MASSACHUSETTS, Central and EastNorfolk County1 WNW West Quincy 25 0929EST1036EST 0 0 8.00K 0.00K FloodSeveral streets in the area of Quincy, Braintree, and Milton were flooded with one to two feet of water. One car was stuck inflood waters at Granite and Chickatawbut Roads in Quincy.Essex CountySalem Maritime Nhs 25 0944EST1009EST 0 0 0.00K 0.00K FloodSeveral streets in Peabody were flooded with one to two feet of water.Suffolk County1 ENE Allston2 N Back Bay Annex25 1012EST1046EST 0 0 0.00K 0.00K FloodSeveral streets in Boston were flooded with one to two feet of water, including Storrow Drive coming out of Kenmore Square.The westbound lanes of Stuart Street were closed at Tremont Street due to flooding. The Massachusetts Bay Transit Authoritysubway station at Boylston Street also flooded.A low pressure moving south of Martha's Vineyard and Nantucket combined with a building high pressure over the Canadianmaritime provinces to produce a strong pressure gradient, resulting in strong winds across Southern New England.MASSACHUSETTS, WestBerkshire CountyShaker Vlg 16 1312EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Wires were reported down on Shaker Lane in Pittsfield due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Berkshire County1 E Richmond Furnace 16 1320EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees and wires were reported down in Richmond due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Berkshire CountyWashington 16 1330EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)MICHIGAN, EastMultiple trees were reported down on wires in Washington due to strong thunderstorm winds.Severe thunderstorms developed during the early afternoon hours ahead of an approaching cold front and upper leveldisturbance on Monday, August 16th. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Oakland County1 NW Trot Big Beaver Arpt 15 1353EST 0 0 0.00K 0.00K Hail (1.00)Oakland County1 NW Trot Big Beaver Arpt 15 1358EST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Numerous trees and power lines were reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Macomb County1 W Cady 15 1418EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A couple large tree limbs were reported blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.210

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MICHIGAN, EastMacomb County2 NW Roseville 15 1428EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A trained spotter estimated a 60 mph thunderstorm wind gust.A couple marginally severe thunderstorms tracked through Oakland and Macomb Counties and into Lake St. Clair. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.Tuscola County1 NW Kingston 19 1330EST 0 0 0.00K 0.00K Thunderstorm Wind (54EG)Trees were reported blown down.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Tuscola County3 ESE Kingston 19 1332EST 0 0 1.00K 0.00K Thunderstorm Wind (56EG)Multiple trees were reported blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Saginaw CountyFreeland 19 1600EST 0 0 0.00K 0.00K Hail (0.75)Saginaw County2 E Saginaw 19 1624EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Trees were reported blown down.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Saginaw County2 SSE Carrollton 19 1626EST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Trees were reported blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Saginaw County1 S Buena Vista 19 1628EST 0 0 0.00K 0.00K Hail (1.75)Saginaw County2 ENE Bridgeport 19 1633EST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Trees were reported blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Tuscola County1 SSE Tuscola 19 1655EST 0 0 0.00K 0.00K Hail (0.75)Genesee CountyDavison 19 1733EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Numerous tree limbs were reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lapeer County3 WNW Lapeer 19 1734EST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Numerous trees were reported down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Genesee County1 SE Davison 19 1735EST 0 0 5.00K 0.00K Thunderstorm Wind (61EG)A steel flag pole was bent, along with damage to a roof.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.211

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MICHIGAN, EastGenesee County1 E Davison 19 1735EST 0 0 15.00K 0.00K Thunderstorm Wind (55EG)Numerous large trees limbs were reported down along with power lines.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lapeer County1 NE Elba 19 1738EST 0 0 50.00K 0.00K Thunderstorm Wind (65EG)A roof was blown off a boat shop, along with boats flipped over.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Lapeer County2 SSW Farmers Creek 19 1744EST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Lapeer County1 NW Metamora1 NNE Almont ArptTrees were blown down in Hadley-Metamora State Park.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.19 1745EST1746EST 0 0 75.00K 0.00K Thunderstorm Wind (65EG)Dozens of trees down, along with large signs. A metal light post was also blown down.Oakland County1 NNW Oxford1 N Lake OrionNote: The estimated wind gust of 65 knots is equivalent to 75 mph.19 1803EST1806EST 0 0 100.00K 0.00K Thunderstorm Wind (61EG)Widespread trees down, with all trees in downtown Oxford damaged.Oakland County1 NNW Oxford1 N Lake OrionNote: The estimated wind gust of 61 knots is equivalent to 70 mph.19 1803EST1806EST 0 0 100.00K 0.00K Thunderstorm Wind (61EG)Widespread trees down, with all trees in downtown Oxford damaged.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Oakland County1 W Lake Orion 19 1807EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Eight to ten inch diameter tree limbs blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Oakland County4 NE Goodison 19 1815EST 0 0 2.00K 0.00K Thunderstorm Wind (56EG)Numerous trees were blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Oakland County4 NE Goodison 19 1815EST 0 0 2.00K 0.00K Thunderstorm Wind (56EG)Numerous trees were blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Macomb CountyMt Vernon 19 1820EST 0 0 50.00K 0.00K Thunderstorm Wind (61EG)Numerous trees reported down in Stony Creek Metropark, along with boats blown over.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.212

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MICHIGAN, EastMacomb County1 SE Mt Vernon 19 1821EST 0 0 3.00K 0.00K Thunderstorm Wind (65EG)Widespread trees were blown down.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Macomb County1 SW Washington 19 1822EST 0 0 5.00K 0.00K Thunderstorm Wind (61EG)Trees and power lines were reported down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Macomb County1 S Disco 19 1825EST 0 0 0.00K 0.00K Hail (0.75)Macomb County3 S Romeo 19 1825EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Numerous tree limbs were reported blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Macomb County2 WSW Utica Arpt 19 1825EST 0 0 3.00K 0.00K Thunderstorm Wind (56EG)Numerous trees were reported down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Macomb County1 S Disco 19 1825EST 0 0 1.00K 0.00K Thunderstorm Wind (56EG)Numerous trees reported down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Macomb County1 SW Utica Arpt 19 1829EST1835EST 2.55 250 0 0 500.00K 0.00K Tornado (EF1)A tornado touched down near the intersection of 22 Mile and Hayes Road at 729 pm, tracking south-southeast before lifting at735 pm just east of Hayes Road on M-59. Maximum winds were estimated to be up to 90 mph. Damage included multiplehomes with roof damage, along with downed trees and power lines.Macomb CountyUtica 19 1831EST 0 0 0.00K 0.00K Hail (0.75)Macomb County3 SE Utica 19 1831EST 0 0 0.00K 0.00K Hail (0.75)Macomb CountyUtica 19 1831EST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)Trees and powerlines were reported blown down.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Macomb County2 E Disco 19 1831EST 0 0 2.00K 0.00K Thunderstorm Wind (56EG)Numerous trees were reported down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Macomb County2 SW Utica Arpt 19 1832EST 0 0 0.00K 0.00K Hail (1.00)213

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MICHIGAN, EastMacomb County2 SW Utica Arpt 19 1832EST 0 0 2.00K 0.00K Thunderstorm Wind (64MG)A trained spotter measured a 74 mph thunderstorm wind gust and reported trees down.Note: The measured wind gust of 64 knots is equivalent to 74 mph.Macomb County3 SW Mt Clemens 19 1840EST 0 0 0.00K 0.00K Thunderstorm Wind (61MG)A trained spotter measured a 70 mph thunderstorm wind gust.Note: The measured wind gust of 61 knots is equivalent to 70 mph.Macomb County4 WNW Mt Clemens 19 1840EST1848EST 5.01 200 0 0 300.00K 0.00K Tornado (EF0)A tornado touched down on Dorchestour Court at 740 pm, just east of Romeo Plank and north of Canal Road. The tornadotracked southeast before lifting at 748 pm just west of the intersection of 14 Mile Road and Harper Avenue. Maximum windswere estimated up to 85 mph. A few homes sustained window, garage, and shingle damage. Wooden fences were blown over.Numerous trees were blown down.Macomb County1 SE (MTC)Mt Clemens/self 19 1845EST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Several large trees blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Macomb County1 SW Washington 19 1845EST 0 0 3.00K 0.00K Thunderstorm Wind (54EG)Trees and powerlines reported down.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Macomb County3 WNW Mt Clemens 19 1845EST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Numerous trees blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Macomb County1 W Mt Clemens 19 1846EST 0 0 50.00K 0.00K Thunderstorm Wind (56EG)Large tree fell onto a house, causing significant damage.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Macomb County3 NE Roseville 19 1848EST 0 0 0.00K 0.00K Hail (0.75)Macomb County3 NE Roseville 19 1848EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A trained spotter estimated a 60 mph thunderstorm wind gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Macomb County2 SSE Mt Clemens 19 1848EST 0 0 2.00K 0.00K Thunderstorm Wind (56EG)Large trees were uprooted as well as a tree snapped.A supercell developed over far northern Saginaw late in the afternoon, then tracked southeast along a frontal boundary. Thisstorm produced a swath of wind damage, large hail, and eventually spawning two tornadoes as it moved through MacombCounty. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.214

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MICHIGAN, Extreme SouthwestBerrien CountyLakeside 04 0804EST0805EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)A trained spotter reported a tree blown down near the intersection of Lakeshore Drive and Lakeside road. In addition to the treedamage, blown transformers and downed power lines were tangled in some of the nearby trees.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Berrien County2 NE Livingston 04 0814EST0815EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)A large tree was blown down, with power lines tangled in the tree, near the intersection of Date and West Linco Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Berrien County1 NW Coloma 04 0837EST0838EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)A trained spotter reported a tree fell onto a house, taking power lines down with it. The downed power lines were trapping threepeople on the porch of the home. They were rescued without injury.A complex of strong to locally severe thunderstorms moved across far southern Lower Michigan producing wind damage insome locations. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Cass County1 NE Union 11 1335EST1336EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)A trained spotter reported a healthy two to three foot diameter fell onto two trailers at Willow Lake Campgrounds.A weak upper level system and moderate instability allowed for thunderstorms to develop. A lack of overall shear resulted inthe storms producing isolated wind damage as cells collapsed or cold pools established. Note: The estimated wind gust of 55knots is equivalent to 63 mph.MIZ077Berrien16 0000EST 1 0 0.00K 0.00K Rip CurrentA strong pressure gradient developed across the Great Lakes, causing strong northwesterly winds and an increased risk of ripcurrents across far southeastern Lake Michigan. At least one rip current developed, this one being at a private beach inChikaming Township, near Harbert in Berrien County. M9IWMICHIGAN, NorthMIZ025Benzie17 1300EST 0 1 0.00K 0.00K Rip CurrentRip currents produced a near-fatality on Lake Michigan.Leelanau CountyLeland 20 1830EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)A few trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chippewa CountyRudyard 20 1925EST 0 0 16.00K 0.00K Thunderstorm Wind (58EG)A barn was destroyed, and several trees were snapped off.Thunderstorms developed well north of a warm front that was moving into Southwest Lower Michigan. A couple of stormsproduced wind damage. Note: The estimated wind gust of 58 knots is equivalent to 67 mph.215

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MICHIGAN, UpperMIZ005-006Alger - Marquette05 1430EST1530EST 4 0 0.00K 0.00K Rip CurrentHigh waves and rip currents led to the drownings of two swimmers near Presque Isle in Marquette and two swimmers in GrandMarais on the afternoon of the 5th. M16IW, M15IWGogebic County8 SW Dunham 13 1638CST1640CST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)A tree fell down on Chaney Lake Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Gogebic County1 SE Ironwood 13 1820CST1822CST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Gogebic County1 W Wakefield3 E MareniscoA tree was blown down on power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.13 1847CST1852CST 0 0 2.00K 0.00K Thunderstorm Wind (60EG)Multiple trees were blown down on Highway US-2 between Wakefield and Marenisco.A cold front moving across the region triggered several severe thunderstorms over western Upper Michigan on the evening ofthe 13th. Note: The estimated wind gust of 60 knots is equivalent to 69 mph.MIZ001-003Keweenaw - Northern Houghton16 1410EST1430EST 0 0 15.0K 0.00K Strong WindA deep low pressure system moving through Ontario produced damaging west winds over the Keweenaw Peninsula on theafternoon of the 16th.Schoolcraft County2 NE Hiawatha 20 1748EST1750EST 0 0 0.00K 0.00K Hail (1.00)Schoolcraft County3 SE Germfask 20 1806EST1808EST 0 0 0.00K 0.00K Hail (1.75)Luce County8 W Deer Park 20 1855EST1859EST 0 0 3.00K 0.00K Thunderstorm Wind (56EG)The Michigan DNRE reported several large trees down near Blind Sucker Flooding.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Luce County2 WNW Deer Park 20 1901EST1904EST 0 0 2.00K 0.00K Thunderstorm Wind (56EG)A camper was flipped over by thunderstorm winds at Muskallonge State Park.Several severe thunderstorms produced damaging wind and large hail over portions of eastern Upper Michigan on the eveningof the 20th. The storms formed ahead of an approaching warm front and affected mainly portions of northern Luce County andsouthern Schoolcraft County. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.MIZ005Marquette27 1740EST1745EST 1 0 0.00K 0.00K Rip Current216

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MICHIGAN, UpperAn 18-year old Northern Michigan University student drowned at Picnic Rocks in Marquette on the evening of the 27th. Southwinds gusting over 20 mph produced a strong longshore current which contributed to the drowning death. M18IWIron CountyIron River 31 2220CST2222CST 0 0 15.00K 0.00K Thunderstorm Wind (55EG)MICHIGAN, WestThunderstorm winds knocked over a large tree onto a house near Iron River on the evening of the 31st.A severe thunderstorm knocked over a large tree onto a house in Iron County late in the evening of the 31st. Note: Theestimated wind gust of 55 knots is equivalent to 63 mph.Kalamazoo County9 WSW Miller Corner 04 0900EST 0 0 Thunderstorm Wind (52EG)Three trees were blown down one mile east southeast of Paw Paw, blocking roads in that area.The far northern end of a weakening bow echo clipped Van Buren county before diminishing, resulting in localized winddamage near Paw Paw, where three trees were blown down and blocked area roads. The storm weakened to below severelevels as it moved further east into Kalamazoo county. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Isabella County3 SSW Mt Pleasant 11122025EST0230EST 0 0 4.00M 0.00K Flash FloodIsabella county emergency management and law enforcement reported that several roads were flooded and washed out and thatthe Central Michigan Community Hospital also was partially flooded due to over 4 inches of rain that fell in just two and a halfhours during the evening hours of August 11th. Extensive flooding damage occurred at Central Michigan University in Mt.Pleasant, where 39 campus buildings incurred extensive damage. The flash flood damage required repairing or replacingceilings, floors, walls, insulation, equipment, electrical and mechanical systems and storm sewers at a cost of 3.5 milliondollars.Flash flooding occurred in downtown Mt. Pleasant from the evening hours of August 11th into the early morning hours ofAugust 12th due to approximately four inches of rain which fell in just two and a half to three hours time. A trained spotter onemile south of downtown Mt. Pleasant reported that 4.16 inches of rain fell from 8 pm to 10:30 pm on August 11th. Flashflooding caused over three million dollars worth of damage to 39 buildings on the campus of Central Michigan University.Street flooding was reported in downtown Mt. Pleasant and the intersection of Isabella and Baseline roads was washed out.The heavy rain flooded portions of Central Michigan Community Hospital and left up to a foot of water on some roads on theeast side of downtown Mt. Pleasant including at High and Bellows streets.MINNESOTA, Central and South CentralTodd County1 E Bertha 07 1820CST1821CST 0 0 0.00K 0.00K Funnel CloudMorrison County3 NW Lastrup 07 1903CST 0 0 0.00K 0.00K Hail (1.00)Douglas County4 W Evansville 07 1905CST1912CST 4.32 50 0 0 25.00K 0.00K Tornado (EF1)A National Weather Service Storm Damage Survey from the Grand Forks, North Dakota Office determined that an EF-1tornado touched down about one mile north of Wendell in Grant County, and had an intermittent track east-southeast throughGrant County. It then moved east across northwestern Douglas County to the south side of Evansville, before lifting. Total pathlength from Grant County into Douglas County was about 21 miles. Damage was confined to large trees, but several powerpoles were blown down in Evansville, causing a city wide power outage.217

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralTodd County5 SW Bertha 07 1912CST1913CST 0 0 0.00K 0.00K Funnel CloudA funnel cloud was reported near County Road 22, and County Road 1.Douglas County2 N Brandon 07 1915CST1917CST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)Several trees and power lines were blown down north of Brandon, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Douglas County1 E Brandon 07 1920CST 0 0 0.00K 0.00K Hail (1.00)Douglas County2 E Garfield 07 1923CST 0 0 0.00K 0.00K Funnel CloudDouglas County3 NNE Holmes City 07 1926CST 0 0 0.00K 0.00K Funnel CloudDouglas County1 NE Garfield 07 1936CST 0 0 0.00K 0.00K Hail (1.00)Douglas County1 S Alexandria 07 1937CST 0 0 0.00K 0.00K Funnel CloudDouglas CountyCarlos 07 1951CST 0 0 0.00K 0.00K Hail (0.75)Winds were estimated around 45 mph, along with dime size hail and 1.18 inches of rainfall.Stearns County1 SSE St Joseph 07 2003CST 0 0 0.00K 0.00K Hail (0.75)Stearns County1 SSE St Joseph 07 2022CST 0 0 0.00K 0.00K Hail (0.75)Morrison County1 SE Lastrup 07 2105CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)A Minnesota Department of Transportion Weather Sensor, measured a wind gust of 51 knots near Lastrup, Minnesota.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Stearns CountySt Joseph 07 2123CST2125CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was uprooted near St. Joseph, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mille Lacs County1 SW Milaca Muni Arpt 07 2130CST2133CST 0 0 25.00K 0.00K Thunderstorm Wind (56EG)Severe straight-line winds caused a patio awning to blow away, a port-a-potty to blow over, and several 2-3 inch diameter treelimbs to be torn off a large tree. In addition, the northern portion of Milaca, Minnesota, lost power.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.218

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralSherburne County2 NNE Elk River 07 2240CST 0 0 0.00K 0.00K Hail (0.88)Washington CountyForest Lake 08 0028CST0030CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was uprooted near Forest Lake, Minnesota.Several short-lived supercell thunderstorms moved across portions of west-central and into east-central Minnesota during themid to late evening hours of Saturday, August 7th. One of the severe thunderstorms produced a tornado near Evansville,Minnesota, with reports of straight-line wind damage as far east as the northern portions of the Twin Cities. These stormsmoved into west-central Wisconsin and produced more damaging winds. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Wright County1 NE Buffalo 08 1723CST1725CST 0 0 0.00K 0.00K Funnel CloudWright CountyMontrose 08 1730CST1732CST 0 0 0.00K 0.00K Funnel CloudHennepin County2 WSW Osseo 08 1755CST1756CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several trees were blown down near the intersection of Interstate 494 & 694.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Washington County2 N Lake Elmo 08 1801CST 0 0 0.00K 0.00K Hail (0.88)Washington County1 E Bayport 08 1805CST1806CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An 8 inch diameter tree was blown down near Bayport, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Washington County2 W Afton 08 1808CST1809CST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)A local trained spotter measured a 54 knot wind gust near Afton, Minnesota.During the late afternoon and early evening hours of Sunday August 8th, severe thunderstorms developed across the northernsuburbs of the Twin Cities. Movement of the storms were very slow due to weak low level flow in the first 5000 ft. Most of thethunderstorms were outflow dominant and caused mainly downburst wind damage, and a few reports of funnel clouds in thewestern suburbs. The storms drifted to the southeast into west-central Wisconsin and caused a severe wind gusts, along with afew funnel cloud reports. Note: The measured wind gust of 54 knots is equivalent to 62 mph.Redwood CountyClements 10 1307CST1308CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Several large trees were blown down from near Clements, to one mile north of Clements, including one tree that fell on a car.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sibley County1 E Green Isle 10 1507CST1509CST 0 0 0.00K 0.00K Funnel CloudSeveral reports of funnel clouds were observed around Green Isle, to Hamburg.219

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralSibley County3 NE Green Isle 10 1510CST1512CST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)Numerous large 12-18 inch diameter trees were blown down along Highway 25 and near the intersection of Highway 25, and158th Street. Also, a few power lines were knocked down due to the trees.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Isanti County2 ESE Oxlio 10 1610CST1611CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)A few power lines were blown down due to severe straight-line winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Chisago County1 NNW Lindstrom 10 1751CST 0 0 0.00K 0.00K Thunderstorm Wind (59MG)A trained spotter measured a 59 knot wind gust at the intersection of Highway 8 and 14.Note: The measured wind gust of 59 knots is equivalent to 68 mph.Dakota County3 NW Farmington 10 2110CST2111CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)A large tree limb was blown down, and fell on a truck near 225th Street, and Chippendale Avenue.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ramsey CountyLittle Canada 10 2115CST2300CST 0 0 0.00K 0.00K Flash FloodSix inches of flowing water occurred at the intersection of County Road C2 and Marion Street. Rainfall reports from severalobservers in Ramsey County had between three and five inches between 8 and 11 pm. One observer reported 4 inches ofrainfall in less than two hours.Dakota County1 NW Farmington 10112200CST0000CST 0 0 0.00K 0.00K Flash FloodCounty Road 50 was covered with six inches of water at one point east of Pilot Knob Road, near Farmington, Minnesota. Inaddition, 9 inches of water was reported along Chippendale Ave West, near Ash St, and Elm St. 1 to 2 feet of water wasreported in fields south of 225th St. West. During the evening, several observers across Dakota County had measured rainfallamounts between three and five inches between 8 and 11 pm.Hennepin County2 ENE Minneapolis 10112245CST0000CST 0 0 0.00K 0.00K Flash FloodA few buses and police cars were stuck in water near Central Ave and 20th Street, north of downtown Minneapolis, Minnesota.Several observers across Hennepin County, especially near the downtown area, had between two and locally five inches ofrainfall between 8 and 11 pm.Several rounds of heavy rainfall led to signficant flash flooding in portions of east-central Minnesota, and west-centralWisconsin. Several areas in the Twin Cities had signficant street flooding with isolated rainfall amounts of 2 to 5 inchesoccurring around the City of Minneapolis where several police cars and buses stalled in the flood waters. Prior to the flooding,lines of strong to severe thunderstorms moved across southern and portions of east central Minnesota, where localized winddamage occurred.Watonwan County3 SE Sveadahl 11 1258CST1301CST 0.09 20 0 0 5.00K 0.00K Tornado (EF0)A funnel had been visible for several minutes before it touched down. The tornado stirred up some dirt, knocked over somesmall items, and tore off a few shingles.220

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralAn isolated thunderstorm developed in Watonwan County and produced a brief tornado touchdown near St. James, Minnesota.Lac Qui Parle County2 SSW Madison 12 1654CST1656CST 1.11 25 0 0 0.00K 0.00K Tornado (EF0)Local law enforcement officials and other spotters observed a rope-like tornado occasionally touching down southwest ofMadison. A damage survey noted a path through corn fields. It also knocked down several large trees and branches, dissipatingnear the northwest end of the Madison golf course.Redwood CountyWalnut Grove 12 1700CST1701CST 0 0 0.00K 0.00K Funnel CloudLac Qui Parle County3 ESE Rosen3 WSW Bellingham12 1705CST1706CST 0.36 25 0 0 25.00K 0.00K Tornado (EF0)Local law enforcement officials, spotters and chasers observed a brief tornado touchdown southwest of Bellingham. Thetornado ripped off a building's porch roof.Redwood County3 WNW Delhi 12 1719CST1720CST 0 0 15.00K 0.00K Thunderstorm Wind (56EG)Several trees and power lines were blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Lac Qui Parle CountyLouisburg 12 1722CST1724CST 0.57 35 0 0 100.00K 0.00K Tornado (EF0)Local law enforcement officials, spotters and chasers observed a brief tornado touchdown on the southern edge of Louisburg.It picked up a grain bin at the Louisburg elevator and threw it 100 yards. Some trees were also uprooted near the same area.Renville CountyOlivia1 E Olivia Muni Arpt12 1735CST1736CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Several large trees with diameters greater than 20 inches were blown down near Olivia, Minnesota.Stevens County1 ENE Morris1 SE Morris ArptNote: The estimated wind gust of 61 knots is equivalent to 70 mph.12 1747CST1748CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Several large tree limbs were blown down near Morris, Minnesota, and a measured wind gust of 60 mph occurred at the Morrisairport.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Mcleod County1 N Hutchinson 12 1810CST1811CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several large tree branches were blown down around Hutchison, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Douglas County1 SE Forada 12 1828CST1830CST 0 0 15.00K 0.00K Thunderstorm Wind (56EG)Several trees and power lines were blown down near Hudson Township.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.221

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralDouglas County3 SE Alexandria 12 1830CST 0 0 0.00K 0.00K Hail (1.00)Wright County1 SE Howard Lake 12 1835CST1836CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several large tree branches were blown down near Howard Lake, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sherburne County3 NNE Becker 12 1839CST1840CST 0 0 0.00K 0.00K Funnel CloudStearns County3 SE Paynesville Arpt 12 1839CST1840CST 0 0 0.00K 0.00K Funnel CloudStearns County2 N Brooten3 WNW Elrosa12 1844CST1854CST 6.23 100 0 0 500.00K 0.00K Tornado (EF1)A National Weather Service Storm Survey determined that an EF-1 tornado touched down approximately two miles north ofBrooten, and tracked to the northeast to approximately 2.5 miles west of Elrosa, Minnesota. Hundreds of trees were snapped oruprooted. Several farmsteads were damaged. Roofs were blown off of barns, and several sheds and outbuildings, includinggrain bins were blown down.Wright County1 NW Buffalo Muni Arpt 12 1845CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A few large tree branches were blown down near Buffalo, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Wright County1 E Monticello 12 1852CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)A 14 inch diameter tree was uprooted near Monticello, Minnesota.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Stearns County1 SSE St Agusta 12 1858CST1900CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A National Weather Service Storm Survey determined that rear flank downdraft winds associated with the St Augusta tornadocaused a couple dozen trees to blow down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Stearns County2 N Holdingford 12 1859CST 0 0 0.00K 0.00K Hail (0.75)Stearns CountySt Agusta 12 1900CST1901CST 0.18 30 0 0 50.00K 0.00K Tornado (EF0)A National Weather Service Storm Survey Team determined that an EF-0 tornado touched down on the east side of St.Augusta, Minnesota. Total path length was less than one-quarter of a mile, with several dozen trees blown down in aneighborhood on the east side of St. Augusta.Stearns County2 NNE Marty2 SSW Pleasant Lake12 1901CST1906CST 0 0 25.00K 0.00K Thunderstorm Wind (56EG)222

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralStearns County2 ENE Pleasant Lake2 S Waite ParkA National Weather Service Storm Survey Team determined that downburst winds caused dozens of trees to blow down fromthe eastern edge of Grand Lake to approximately three miles east of Rockville, Minnesota. One house suffered significantdamage.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.12 1908CST1909CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A National Weather Service Storm Survey Team determined that downburst winds caused a couple dozen trees to topple justnorthwest of the intersection of Highway 15 and Interstate 94.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sherburne County4 WNW Cable 12 1910CST1911CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A National Weather Service Storm Survey Team determined that downburst winds caused about two dozen trees to topple inthe southeast part of St. Cloud.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mille Lacs County1 SW Milaca Muni Arpt 12 1932CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An 18 inch diameter tree was blown down near Milaca, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Isanti County1 NNW Walbo 12 1935CST1936CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several large tree limbs were blown down near Walbo, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Chisago County8 SSW Rush Pt 12 1941CST1950CST 0 0 0.00K 0.00K Thunderstorm Wind (65EG)Renville CountySacred Heart 1213A large swath of trees were uprooted from east of Cambridge, or near County Road 2 and Highway 95, northeast to CountyRoad 4 and 7 east of Stanchfield, Minnesota.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.2215CST0100CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rainfall occurred between 10 PM CST to 12 Midnight CST across a large area of Renville County. A sectionof Highway 212 near Sacred Heart was closed due to the flood waters. Some areas along Highway 212 had knee deep waterduring the height of the storm.Renville CountySacred Heart 12 2230CST 0 0 0.00K 0.00K Hail (0.75)Watonwan County7 SSE Darfur 12 2257CST 0 0 0.00K 0.00K Hail (1.00)Renville County1 W Olivia 12132300CST0100CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rainfall occurred between 10 PM CST to 12 Midnight CST across a large area of Renville County. A sectionof Highway 212 near Olivia, Minnesota, had 12 inches of flowing water over it during the height of the storm. Some areas inRenville County measured over five inches of rainfall during the overnight hours.223

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralRenville CountyRenville 12132300CST0100CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rainfall occurred between 10 PM CST to 12 Midnight CST across a large area of Renville County. A sectionof Highway 212 near Renville, Minnesota, was closed due to the flood waters. Some areas along Highway 212 had 10 inches offlowing water over it during the height of the storm.Martin County1 NW Fairmont2 N Fairmont Arpt12 2330CST2332CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Lots of trees and power lines were blown down, especially west of Fairmont, Minnesota. In addition, a warehouse roof andlarge garage was damaged at an industrial park. Some damage also occurred at the Martin County fairgrounds.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Mcleod CountyBrownton 13 0000CST0200CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rainfall occurred between 11 PM CST to 1 AM CST across a large area of Mcleod County. Significant streetflooding occurred in the town of Brownton, Minnesota where a few streets were closed during the height of the storm.Carver County1 N Norwood1 WNW Young America13 0020CST0022CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several large tree branches were blown down near Norwood, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Blue Earth County3 SW Minneopa 13 0021CST 0 0 0.00K 0.00K Hail (0.75)Carver CountyNorwood 13 0100CST0330CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rain fell across a large portion of Carver County between 1 and 4 AM CST. Some areas in the town of YoungAmerica/Norwood, Minnesota had 12-18 inches of flowing water over its streets during the height of the storm.Carver CountyCologne 13 0100CST0330CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rain fell across a large portion of Carver County between 1 and 4 AM CST. Some areas in the town ofCologne, Minnesota had 12 inches of flowing water over its streets during the height of the storm.Carver County3 N Chaska 13 0115CST0330CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rain fell across a large portion of Carver County between 1 and 4 AM CST. The town of Chaska, Minnesota,north of Highway 212 had four feet of flowing water over it during the height of the storm.Carver County1 SW Carver 13 0120CST0121CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Several large trees were blown down in Carver, Minnesota.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.224

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralCarver County2 SSW Carver 13 0130CST0400CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rain fell across a large portion of Carver County between 1 and 4 AM CST. Some areas in the town ofCarver, Minnesota had 8 inches of flowing water over most of their city streets during the height of the storm.Steele County3 W Ellendale 13 0130CST0132CST 0 0 50.00K 0.00K Thunderstorm Wind (56EG)A roof was blown off a grainery and a large tree was uprooted west of Ellendale, Minnesota.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Rice County3 SW Shieldsville 13 0155CST0157CST 0 0 0.00K 0.00K Thunderstorm Wind (63MG)Hennepin County2 SE Deephaven1 SSW TonkawoodSeveral large tree branches were blown down near Shieldsville, Minnesota. In addition, a trained spotter measured a wind gustof 63 knots.Note: The measured wind gust of 63 knots is equivalent to 72 mph.13 0200CST0400CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rain fell across a large portion of Hennepin County between 2 and 4 AM CST. The town of Minnetonka,Minnesota had 12 inches of flowing water over Highway 7 during the height of the storm.Scott County1 SE Belle Plaine 13 0200CST0430CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rain fell across a large portion of Scott County between 2 and 5 AM CST. Some areas in the town of BellePlaine, Minnesota had significant street flooding during the height of the storm. Some areas in Scott County measured nearlyfour inches of rainfall overnight.Dakota County3 NW Farmington 13 0204CST0208CST 1.52 125 0 1 750.00K 0.00K Tornado (EF1)A Storm Survey determined that an EF-1 tornado tracked to the northeast from three miles northwest of Farmington, to 3.3miles north of Farmington, Minnesota.The damage consisted of the following;A few homes had large sections of roof structure removed. Numerous homes had significant roof damage, with loss of vinyl ormetal siding. In addtion, numerous garage doors had collapsed or were pushed inward. One home had their entire garageshifted off its foundation by over 5 inches. Another home had their entire garage collapse, only leaving the main home intact.Due to several structures that had their foundations shifted and walls completely blown down, this tornado was rated a high endEF-1, which is approximately 105 mph. Most of the tornado damage was high end EF-0, or low end EF-1, or approximately 70to 90 mph. Hundreds of trees were either uprooted or blown down. Several trees had diameters in excess of 30 inches.Goodhue CountyRoscoe1 SE Wanamingo13 0215CST0220CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Several large trees that were blown down between Wanamingo and Roscoe, Minnesota.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.225

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralGoodhue CountyHader 13 0217CST0220CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several trees were blown down at the intersection of 410th street and County Road 8.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Goodhue County1 SE Trout Brook 13 0225CST0226CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down at County Road 45 and County Road 5 near Hay Creek Trail.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Dakota County4 WNW Rosemount 13 0230CST0530CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rain fell across a large portion of Dakota County between 2 and 5 AM CST. Some areas between AppleValley and Rosemount, Minnesota had flood waters reaching as high as car doors during the height of the storm.Rice CountyFaribault 13 0230CST0530CST 0 0 0.00K 0.00K Flash FloodSeveral inches of rain fell across a large portion of Rice County between 2 and 5 AM CST. Some areas in the town ofFaribault, Minnesota had significant street flooding during the height of the storm. Some areas of Rice County measuredbetween three and 4.50 inches of rainfall overnight.Mcleod CountyLester Prairie 13 0321CST 0 0 0.00K 0.00K Hail (1.50)Pope County1 NW Hareb 13 0445CST 0 0 0.00K 0.00K Hail (0.75)Pope County5 SSE SedanTerrace13 0510CST0516CST 0 0 0.00K 0.00K Hail (1.00)Several reports of nickel to quarter size hail was observed near Terrace and east of Terrace, Minnesota.Stearns CountyBrooten 13 0529CST 0 0 0.00K 0.00K Hail (0.75)Three waves of thunderstorms moved across southern and central Minnesota during the late afternoon of August 12th, throughearly Friday morning, August 13th. Severe periods of severe weather occurred in the afternoon and evening before it becamemore of a heavy rainfall, and flash flooding event. Several reports of tornadoes, wind damage and large hail occurred from west-central Minnesota, through south central, and east-central Minnesota. A tornado occurred in the town of Farmington,Minnesota during the odd hour of 3 am.Kandiyohi County4 ENE Hawick 13 1325CST 0 0 0.00K 0.00K Hail (0.75)Stearns CountyHoldingford 13 1348CST1350CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A 20 inch diameter tree was blown down near Holdingford, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.226

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralStearns County3 NNW St StephenSartell13 1355CST1400CST 0 0 50.00K 0.00K Thunderstorm Wind (61EG)Hundreds of trees were broken or snapped in an eight mile wide swath extending from County Road 17 to Sartell on the easternedge of Stearns County. A silo and a shed's roof were blown down.Benton County3 S Rice5 N FruitvilleNote: The estimated wind gust of 61 knots is equivalent to 70 mph.13 1400CST1410CST 0 1 50.00K 0.00K Thunderstorm Wind (70MG)Many hundreds, perhaps thousands of trees were uprooted, snapped or broken in an eight mile wide swath that extended fromthe western edge of the county, near Rice to Watab, to just north of Sartell, to north central Benton County, in GrahamTownship, centered near State Highway 25 and County Road 77. In addition, a local Minnesota Department of TransportationWeather Station near Rice, measured a wind gust of 64 knots. A semi-truck was blown over near Rice along Highway 10,resulting in one injury. Plus, a spotter on the northeast shore of Little Rock Lake measured a wind gust of 81 mph before histower collapsed and the anemometer ceased to function. The intense wind blew from the southwest. Hundreds of large andhealthy trees were broken or snapped, blocking roads. The storm survey team concluded a downburst hit the area.Morrison CountyRoyalton3 N Little RockNote: The measured wind gust of 70 knots is equivalent to 81 mph.13 1400CST1410CST 0 0 250.00K 0.00K Thunderstorm Wind (65EG)Significant straight-line wind damage occurred from near Royalton, east along and near East Nature Road for roughly 13 miles.Damage included a chicken barn roof blown off, shingles off a home, and several large trees uprooted.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Stearns County4 SSW St Agusta 13 1400CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An 8 inch diameter tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Benton County1 ENE Gilman 13 1412CST1413CST 0 0 0.00K 0.00K Thunderstorm Wind (70MG)A wind gust of 81 mph was measured in the city of Gilman, Minnesota.Mille Lacs County3 WNW Milaca Muni Arpt2 NNW MilacaNote: The measured wind gust of 70 knots is equivalent to 81 mph.13 1433CST1437CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Several large trees were broken, a shed was destroyed, and some siding on a house was ripped off. In addition, a large tree wasblown down in the city of Milaca.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Sherburne County1 SSE Clear Lake 13 1440CST1443CST 0 0 0.00K 0.00K Hail (1.00)Several reports of nickel, up to quarter size hail fell around the Clear Lake area of Minnesota.Sherburne CountyClear Lake 13 1443CST 0 0 0.00K 0.00K Funnel Cloud227

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralKanabec County2 N MoraMora Arpt13 1449CST1455CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Several trees were blown down around Mora, Minnesota. In addition, the local AWOS at Mora measured a wind gust of 56mph at 255 PM CST, with a report of 57 mph wind gust northeast of Mora on a local RAWS Station.Kanabec County3 E Brunswick2 WNW GrasstonNote: The estimated wind gust of 61 knots is equivalent to 70 mph.13 1452CST1454CST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)A storm survey indicated that a downburst caused dozens of trees to be blown down in southeastern Kanabec County. A fewsheds were destroyed, and the roof of a barn collapsed.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Washington County2 ESE Hugo 13 1530CST 0 0 0.00K 0.00K Hail (0.75)Blue Earth County1 NW Rapidan 13 1626CST 0 0 0.00K 0.00K Funnel CloudBlue Earth County4 NW Rapidan 13 1635CST1637CST 0.08 25 0 0 0.00K 0.00K Tornado (EF0)Tornado touched down just southeast of the intersection of Highways 60 and 169. It hit a field and lofted numerous corn stalks.After dissipating, the parent circulation moved to the vicinity of the intersection of County Road 90 and State Highway 22, butno additional touchdowns were noted. Tornado was photographed by spotter.A line of severe thunderstorms developed east of Alexandria, Minnesota, and quickly moved east-northeast across centralMinnesota and produced measured winds in excess of 80 mph at times.Several thousand trees were either uprooted or blown down from eastern Stearns County, eastward across western Benton, andsouthern Morrison County. There was a semi blown over near Rice, a large communication tower blown down, and severalsheds and barns damaged or destroyed.Blue Earth County4 SSW Butternut 19 0222CST0223CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Thunderstorms had developed across southern Minnesota during the early morning hours of August 19th. A measured windgust of 60 mph occurred along the border of Watonwan and Blue Earth Counties before the storms weakened. Note: Themeasured wind gust of 52 knots is equivalent to 60 mph.Lac Qui Parle County1 SE Madison 19 2215CST2217CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several large tree limbs were blown down at the Madison County Golf Course.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Stearns CountyBrooten 19 2325CST2327CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several trees were blown down around Brooten, Minnesota.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Stearns County2 E Melrose 19 2355CST2357CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A truck on County Road 65, east of Melrose, Minnesota was blown off the road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.228

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, Central and South CentralIsanti County1 S Cambridge 20 0204CST0205CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Chisago County1 S North Branch 20 0218CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down.A complex of thunderstorms that developed across eastern South Dakota, moved northeast into portions of west-centralMinnesota, and central Minnesota during the late evening and early morning hours of August 19th and 20th. Several reports ofdowned trees occurred from west of Montevideo, northeast to around St. Cloud Minnesota. Note: The estimated wind gust of52 knots is equivalent to 60 mph.Waseca County3 ENE Waldorf 31 1557CST1558CST 0 0 250.00K 0.00K Thunderstorm Wind (56EG)Two large hog barns were blown down northeast of Waldorf, Minnesota.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Freeborn County1 NE Albert Lea 31 1615CST1715CST 0 0 0.00K 0.00K Heavy RainAn observer measured 2.15 inches of rainfall in less than one hour.Freeborn County(AEL)Albert Lea Arpt 31 1615CST1616CST 0 0 10.00K 0.00K Thunderstorm Wind (51MG)Several large trees and power lines were blown down on the northside of Albert Lea, Minnesota. The local AWOS airportmeasured a wind gust of 59 mph near the same time.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Freeborn County1 NE Albert Lea 31 1630CST1730CST 0 0 0.00K 0.00K Heavy RainA local observer reported ponding of water along city streets in north Albert Lea, Minnesota.Goodhue County1 S Zumbrota 31 1630CST1830CST 0 0 0.00K 0.00K Heavy RainMINNESOTA, NortheastA local observer measured 2.72 inches of rainfall in three hours.A strong cold front moved across eastern Minnesota during the late afternoon of Tuesday, August 31st. A line of strong tosevere thunderstorms developed along the Iowa border and moved northeast across South Central, and into East CentralMinnesota. Most of the storm only produced very heavy rainfall and gusty winds. However, a few storms caused damage to ahog farm building, and trees damage in Albert Lea, Minnesota. The storms quickly moved into west central Wisconsin duringthe evening hours but were non severe.MNZ012-021Northern Cook/Northern Lake - Southern Cook01310000CST2359CST 0 0 0.00K 0.00K DroughtA lack of appreciable rain led to a continuation of the Severe (D3) drought conditions across parts of the Arrowhead, accordingto the U.S. Drought Monitor.229

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, NortheastSt. Louis County1 WNW North HibbingRuby Jct01022355CST0400CST 0 0 0.00K 0.00K Flash FloodTraining thunderstorms caused many streets in Hibbing to be inundated with water.Cass CountyPine River 07 2013CST 0 0 1.50K Thunderstorm Wind (50EG)Several people reported trees down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Crow Wing CountyCross Lake 07 2025CST 0 0 0.50K Thunderstorm Wind (50EG)St. Louis CountySmithville1 NE New DuluthA tree was blown down on County Road 1.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.07082239CST0100CST 0 0 0.00K 0.00K Flash FloodPortions of Grand Avenue near the Smithville, Riverside, and Morgan Park areas of West Duluth were closed due to highwater. Some cars became partially submerged and stalled due to 2.5 to 3 feet of water covering 88th Avenue West in MorganPark. Nearly 4.5 inches of rain fell in West Duluth between 10:00 pm and 12:20 am CDT.A few thunderstorms became severe, producing damaging winds in the Brainerd Lakes region and some flash flooding in WestDuluth.Koochiching County5 WSW Little Fork 08 1858CST 0 0 Hail (1.75)The hail fell for 10 minutes, with U.S. Highway 71 completely covered. Very strong wind gusts accompanied the hail.An isolated severe thunderstorm moved through the Borderland.Pine County7 SW Pine City 12 2000CST 0 0 0.50K Thunderstorm Wind (50EG)A tree was blown down on State Highway 70 near the intersection of Pine County Road 1.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pine CountyPine City 12 2000CST 0 0 0.50K Thunderstorm Wind (50EG)A large tree was blown down at the intersection of Knob Road and Rolling Hills Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pine County4 WSW Pokegama 12 2000CST 0 0 2.00K Thunderstorm Wind (50EG)Power lines were blown down in the Grasston area.An isolated severe thunderstorm produced damaging wind gusts across portions of east-central Minnesota. Note: The estimatedwind gust of 50 knots is equivalent to 58 mph.Pine County4 SE Pine City 13 1327CST 0 0 0.00K 0.00K Hail (1.00)The hail fell along State Highway 70 east of Rock Creek.Pine County3 ENE Rock Creek 13 1405CST1900CST 0 0 0.00K 0.00K Flash FloodWater was flowing over State Highway 70, about 3 miles east of Interstate 35.230

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, NortheastPine County8 WSW Pine City 13 1503CST 0 0 2.00K Thunderstorm Wind (50EG)Trees were blown down in Grasston Township.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pine County1 W Pine City 13 1507CST 0 0 2.00K Thunderstorm Wind (50EG)Power lines were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pine CountyHinckley 13 1515CST 0 0 2.00K Thunderstorm Wind (50EG)Power lines were blown down.Severe thunderstorms produced large hail, damaging winds, and some flash flooding in east-central Minnesota. Note: Theestimated wind gust of 50 knots is equivalent to 58 mph.Aitkin CountyMc Gregor 20 0156CST 0 0 Thunderstorm Wind (50EG)MINNESOTA, NorthwestOtter Tail County6 NW Ottertail 0102Some trees were blown down.A thunderstorm became severe and produced damaging wind gusts. Note: The estimated wind gust of 50 knots is equivalent to58 mph.2200CST0600CST 0 0 1.00K 25.00K Flash FloodRainfall amounts from 4 to 5 inches produced flooding to area fields and farm access roads.Persistent thunderstorms north of a warm front produced heavy rains over portions of Otter Tail County.Roseau County2 NE (D45)Carlson Fld War 03 0015CST 0 0 Hail (1.00)Quarter sized hail was still on the ground at 6 am CDT.Roseau County2 NE (D45)Carlson Fld War 03 0015CST 0 0 Thunderstorm Wind (55EG)A few trees were snapped off and numerous branches were taken down on Springsteel Island north of Warroad.An upper level disturbance tracked along the Canadian border during the early morning hours of the 3rd, and produced isolatedhail and strong winds. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Wilkin County3 WNW Tenney 07 1725CST 0.2 25 0 0Tornado (EF0)This tornado touched down briefly in an open field, roughly seven miles east of a larger and much longer lasting tornado.Wilkin County4 SSE Breckenridge 07 1732CST 0 0 0.00K 0.00K Funnel CloudThe persistent funnel cloud tracked east-northeast to near Foxhome before dissipating.Wilkin County4 SW Doran 07 1735CST 0 0 Hail (1.75)231

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, NorthwestWilkin County5 SW Doran 07 1737CST1750CST 2.5 600 0 0Tornado (EF4)This tornado began in Richland County, North Dakota, at 625 pm CDT, where it had a path length of 2.5 miles. It continued inWilkin County, Minnesota, where it finally lifted about 2.5 miles southwest of Doran. The total path length was roughly fivemiles and peak winds were estimated at 175 mph.Otter Tail County3 NW Western 07 1738CST 0 0 0.00K 0.00K Funnel CloudWilkin County3 N Nashua 07 1746CST1748CST 1 15 0 0Tornado (EF0)This tornado tracked for about a mile through mainly open fields. This was the latter of three distinct tornadoes which occurredfrom at least four distinct funnel clouds in Wilkin County during a roughly 15 to 20 minute period. Peak winds were estimatedat 75 mph.Otter Tail County4 NE Western7 SSE Fergus Falls07 1758CST1812CST 4 75 0 0Tornado (EF1)This tornado tracked intermittently for about 4 miles, mainly over open fields. However, the tornado did knock down sometrees in shelterbelts and left swirls in crops. The tornado and debris cloud was viewed from near Elbow Lake. Peak winds wereestimated at 90 mph.Otter Tail County2 NE Rothsay 07 1830CST 0 0 0.00K 0.00K Funnel CloudA wall cloud and developing funnel were reported.Otter Tail County3 NE Rothsay 07 1833CST 0.2 25 0 0Tornado (EF0)A brief tornado touchdown occurred in an open field. No significant damage was observed.Grant County1 N Wendell3 ENE Erdahl07 1835CST1905CST 16.67 100 0 0Tornado (EF1)This tornado tracked intermittently for nearly 16 miles, to about 3 miles east of Erdahl. At this point, it continued into DouglasCounty. The tornado broke down numerous trees and large tree limbs along its path. At times, the tornado was wrapped in veryheavy rains. Peak winds were estimated at 100 mph.Otter Tail County3 SW Wrightstown 07 1859CST1905CST 2.19 75 0 0Tornado (EF1)Several large tree limbs were twisted or broken down in tree stands and shelterbelts. Peak winds were estimated at 90 mph.Wadena County2 WSW Wadena 07 1901CST 0 0 Hail (1.00)Wilkin County7 NW Nashua 0708The hail fell one mile east of the Wadena airport.1910CST0400CST 0 0 2.00K 50.00K Flash FloodMultiple heavy downpours of 3 to 4 inches of rain produced localized flooding of farm fields and farm access roads near theRabbit River drainage.232

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, NorthwestWadena County1 SE Blue Grass 07 1925CST 0 0 Hail (1.00)By late in the day on the 7th, an east-west lying warm front had set up just north of the South Dakota border, extendingeastward into west central Minnesota. South of the warm front, temperatures were in the mid to upper 80s with dew points inthe lower 70s. Thunderstorms formed along and north of the warm front and several produced tornadoes.Otter Tail County2 NW Urbank 12 0540CST 0 0 Hail (1.00)The hail occurred 1.5 miles north of Lake Jessie in Leaf Mountain Township.Clay County5 NW Sabin 12131418CST0400CST 0 0 5.00K 10.00K Flash FloodStreets flooded in the town of Sabin. In rural areas around Sabin, ditches filled with water and flooded several rural roads.Clay County1 SSW Moorhead 12 2000CST 0 0 Thunderstorm Wind (55EG)A large tree was blown down in Moorhead.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Otter Tail County3 ESE Phelps 12 2145CST 0 0 Thunderstorm Wind (60EG)Strong east winds flipped multiple boat lifts and damaged several docks on the west end of Otter Tail Lake.A strong low level jet and good warm advection helped to spawn a couple strong thunderstorms in the early morning hours ofthe 12th. Then there was a brief break before strong thunderstorms began to flare up again by the early afternoon.Thunderstorms kept firing north of a warm front located over northeast South Dakota and southern Minnesota, as the low leveljet and warm advection stay strong through the day. These storms produced very heavy rainfall rates and some flash flooding aswell as sporadic reports of strong winds into the evening. Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Marshall County1 NNW Thief Lake 17 1625CST 0 0 Hail (0.88)The observer also reported 0.7 inches of rain in 15 minutes.Marshall County3 NW Thief Lake 17 1630CST 0 0 Hail (2.00)The hail was very jagged or had spikes.Marshall County3 W Thief Lake 17 1630CST 0 0 Hail (2.00)Marshall County5 ESE Rosewood 17 1631CST 0 0 0.00K 0.00K Funnel CloudMultiple funnel clouds were reported.Marshall County6 N Viking 17 1635CST 0 0 Hail (1.25)Pennington County3 ESE Mavie 17 1750CST 0 0 Hail (1.00)A weak surface low dropped southeast into extreme northwest Minnesota late in the afternoon of the 17th, with a warm frontextending out to its east. Winds of nearly opposite directions impinged upon the boundary, creating nice surface windconvergence. Thunderstorms formed along this boundary and produced hail and funnel clouds.233

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, NorthwestWilkin County2 SW Doran 18 0900CST 0 0 Hail (1.00)Grant County1 NE Herman 18 1013CST 0 0 Hail (0.75)Grant County3 WSW Herman 18 1015CST 0 0 Hail (0.88)A nearly stationary boundary set up from northeast South Dakota into west central Minnesota during the morning of the 18th.Showers and thunderstorms formed north of the surface boundary and tracked east with time, some producing large hail.Beltrami CountyShooks 30 2125CST 0 0 Thunderstorm Wind (52MG)MINNESOTA, SoutheastThe wind gust was measured by a MNDOT RWIS mesonet sensor.Conditions were ripe for severe weather during the late afternoon and early evening of the 30th, as afternoon temperatures hadpeaked out in the 80s with some dew point readings around 70F. In addition, a surface boundary had set up along a Jamestown(ND) to Roseau (MN) line. Just above the surface layer, the low level jet was quite strong, with wind speeds of 50 to 60 knots.Instead of forming along the surface boundary, most of the thunderstorms fired out well to the east of the surface boundary, inan area of overall weaker bulk shear. Therefore, most of the thunderstorms were weaker than expected. However, along theleading edge of one of the lines of thunderstorms that formed, some of the strong winds aloft did mix down to the surface andproduce strong wind gusts. Note: The measured wind gust of 52 knots is equivalent to 60 mph.MNZ086Dodge12 1100CST1430CST 0 0 0.00K 0.00K HeatThe combination of very warm temperatures and high dew points led to extreme apparent temperature values across southeastMinnesota on the 12th. The apparent temperature at Dodge Center (Dodge County) was at or above 105 degrees for three hoursin the afternoon.Dodge County2 E Berne 13 0220CST 0 0 0.25K 0.00K Thunderstorm Wind (50EG)The tops of some trees were snapped off.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Olmsted CountyOronoco 13 0253CST 0 0 5.00K 0.00K Thunderstorm Wind (60EG)Many large trees were blown down in the city of Oronoco. Damage occurred to the soffit, facia, siding, and garage door of ahome. Also, a camper tumbled and was moved from its original location.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Wabasha County1 W Reads Lndg 13 0300CST0600CST 0 0 0.00K 0.00K Heavy RainBetween the hours of 3:00 a.m. and 6:00 a.m. CST, 4.30 inches of rain was measured. In this same time frame, 4.16 inches wasmeasured in Wabasha, 3.81 inches was measured in Theilman, and 3.43 inches was measured at a location 2.5 miles southsoutheast of Kellogg.Wabasha CountyLake City 13 0316CST0320CST 0 0 1.05M 0.00K Thunderstorm Wind (65EG)Hundreds of trees and at least a half dozen power poles were blown down throughout the city of Lake City. Damage was alsoreported to several homes as well as to a 100,000 bushel grain bin and a dryer at a local business. The grain bin was destroyed.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.234

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, SoutheastWabasha County1 W Reads Lndg 13 0330CST 0 0 3.00K 0.00K Thunderstorm Wind (42MG)Despite only measuring a 48 mph gust, several 9 inch diameter trees were blown down, one of which blocked County Road 77.Also, some roofing material was blown off a house.Note: The measured wind gust of 42 knots is equivalent to 48 mph.Olmsted CountyStewartville 13 0430CST0435CST 0 0 20.00K 0.00K Thunderstorm Wind (70EG)Numerous trees were blown down throughout the city of Stewartville. Also, two mobile homes were significantly damaged byuprooted trees in the Southern Hills Mobile Home Community. Phone service was spotty for a time, while parts of the city lostpower.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Olmsted County2 N Stewartville 13 0430CST 0 0 5.00K 0.00K Thunderstorm Wind (70EG)A semi truck was blown over near the interchange of U.S. Highway 63 and Interstate 90, just north of Stewartville.Winona County2 E Winona2 NW HomerNote: The estimated wind gust of 70 knots is equivalent to 81 mph.13 0500CST0700CST 0 0 0.00K 0.00K FloodStreet flooding occurred in the city of Winona after 1.08 inches of rain fell.Wabasha County2 ESE Bear Vly 13 0508CST0800CST 0 0 0.00K 0.00K FloodWater was over U.S. Highway 63 north of Zumbro Falls. The cooperative observer from Zumbro Falls reported that 3.20inches of rain fell between 3:00 a.m. and 6:00 a.m. CST.Winona CountyPickwick 13 0525CST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Dodge County1 N Hayfield5 SSW Dodge Center ArptLarge trees were blown down.A very strong line of thunderstorms moved through southeast Minnesota during the early morning hours of August 13th.Strong winds blew down trees and some significant structural damage, while widespread heavy rain amounts of 3 to 4 inchescaused some flash flooding, road closures, and rises along rivers, streams and creeks. Note: The estimated wind gust of 50knots is equivalent to 58 mph.13 1422CST1446CST 4.87 140 0 0 110.00K 24.00K Tornado (EF1)The tornado damage path began just south of State Highway 30 west of Hayfield. The tornado did move off to the northeastnearing State Highway 56 before taking a north northwest track until it lifted just south of County Road 6. Damage was notedto soybean and corn fields, numerous trees and limbs were snapped and uprooted, roofing damage occurred to a metalbarn/shed, while an old barn was lifted off of its foundation for a complete loss. Also, a local residence had some small beamsknocked out from underneath a porch on the front of the house.Dodge CountyDodge Center 13 1435CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)The automated weather observing equipment at the Dodge Center Airport measured a wind gust of 58 mph.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Olmsted County3 ESE Salem Corners 13 1437CST1446CST 0 0 0.00K 0.00K Funnel CloudAir traffic controllers at the Rochester International Airport could see a funnel cloud to the southwest of the airport.235

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, SoutheastDodge County3 SE Kasson 13 1450CST 0 0 0.00K 0.00K Hail (0.75)Olmsted CountyByron 13 1500CST1836CST 0 0 0.00K 0.00K Heavy RainHeavy rain fell in the city of Byron, with 3.10 inches measured.Olmsted County1 E Dover 13 1530CST1747CST 0 0 0.00K 0.00K Heavy RainHeavy rain fell across the area, with 3.30 inches of rain measured 1 mile east of Dover. In the same time frame, 2.20 inches ofrain fell at Chester Woods Park, located 2 miles east of Chester.Olmsted County2 SE Rock Dell 13 1550CST 0 0 0.00K 0.00K Funnel CloudA funnel cloud was seen near the Dodge County line by spotters and amateur radio operators.Olmsted County1 S Rock Dell 13 1640CST 0.02 25 0 0 0.00K 0.00K Tornado (EF0)No damage was found after the tornado touched down briefly in a field.Olmsted County3 SSE Rochester 13 1721CST2130CST 0 0 0.00K 0.00K FloodStreet flooding occurred through portions of Rochester. Also, at one local business, the water rose high enough to get into cars.Olmsted County1 NNE Simpson 13 1721CST 0 0 0.00K 0.00K Hail (1.00)The hail fell at the intersection of U.S. Highway 52 and Interstate 90.Olmsted County1 N Eyota 13 1741CST 0 0 0.00K 0.00K Hail (0.88)Winona County1 SSE The Arches 13 1742CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down and water was over some roads in the Farmers Park area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Winona County3 SSE St Charles 13 1800CST 0 0 0.00K 0.00K Hail (0.75)A surface boundary extended into southeast Minnesota from an area of low pressure over southwest Minnesota on theafternoon of August 13th. Favorable shear and instability existed along this boundary for supercell thunderstorms, which diddevelop in the early afternoon hours. These thunderstorms produced tornadoes, along with severe thunderstorm winds, largehail and flooding.Olmsted County3 SSE Little Vly 13141815CST0045CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Middle Fork of the Whitewater River out of its banks near the Whitewater State Park on August13th into the early morning of the 14th. The river exceeded the flood stage by over a foot, cresting at 14.91 feet.236

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, SoutheastA very strong line of thunderstorms moved through southeast Minnesota during the early morning hours of August 13th.Strong winds blew down trees and some significant structural damage, while widespread heavy rain amounts of 3 to 4 inchescaused some flash flooding, road closures, and rises along rivers, streams and creeks.Winona County1 SSE St Charles 13 1830CST2230CST 0 0 0.00K 0.00K FloodFillmore County2 WSW Chatfield 1314Street flooding was reported in the city of St. Charles.2234CST0230CST 0 0 0.00K 0.00K FloodWater was over County Road 2 west of Chatfield.A surface boundary extended into southeast Minnesota from an area of low pressure over southwest Minnesota on theafternoon of August 13th. Favorable shear and instability existed along this boundary for supercell thunderstorms, which diddevelop in the early afternoon hours. These thunderstorms produced tornadoes, along with severe thunderstorm winds, largehail and flooding.Houston County3 NE Hokah 20 1341CST 0 0 0.25K 0.00K Thunderstorm Wind (52EG)MINNESOTA, SouthwestA few trees were blown down northeast of Hokah.Severe thunderstorms developed during the early afternoon of August 20th and produced some isolated wind damage inHouston County. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Rock County2 ENE Manley 10 0400CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including up to 2 inch diameter branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Rock County4 E Luverne Arpt 10 0452CST0549CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding of numerous roads, including parts of U.S. Highway 75. Several low areas including someyards were flooded, as well as small streams in the area. Some of the flooded roads were in Blue Mound State Park.Rock County2 NNW Hills 10 0500CST0549CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding of several low lying areas including fields, yards, and some roads.Nobles CountyLismore 10 0500CST 0 0 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew down tree branches and power lines, with resulting power outages.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Nobles CountyRushmore 10 0506CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including a few trees blown down.Thunderstorms produced damaging winds, and heavy rain which produced flash flooding, in Rock and Nobles Counties insouthwest Minnesota during the early morning of August 10th. Note: The estimated wind gust of 56 knots is equivalent to 64mph.237

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, SouthwestPipestone County5 SSW Ihlen 12 1600CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds blew down power lines.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lincoln County2 NW Lake Benton 12 1605CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Pipestone County1 S Edgerton 12 1615CST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds blew the roof off a bowling alley, and caused tree damage.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Rock CountyHardwick 12 1615CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including up to 4 inch diameter branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lyon County3 WNW Russell 12 1630CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lyon County1 N Tracy 12 1650CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Murray County1 E Dovray 12 1656CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Lyon County1 N Tracy 12 1700CST 0 0 0.00K 0.00K Thunderstorm Wind (60EG)Thunderstorm winds caused tree damage, including several branches blown down.Thunderstorms produced damaging winds at several locations in southwest Minnesota during the late afternoon of August 12th.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Lincoln County3 S Hendricks 19 2139CST2144CST 0 0 0.00K 0.00K Thunderstorm Wind (66MG)Thunderstorm winds caused tree damage.Note: The measured wind gust of 66 knots is equivalent to 76 mph.Lincoln County1 S Ivanhoe 19 2200CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several branches blown down.Thunderstorms produced damaging winds in Lincoln County of southwest Minnesota on the evening of August 19th. Note:The estimated wind gust of 52 knots is equivalent to 60 mph.238

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MINNESOTA, West CentralBig Stone County2 SE Beardsley 01 1525CST 0 0 Hail (1.00)Big Stone County3 ESE Beardsley 01 1530CST 0 0 Thunderstorm Wind (52EG)Many large tree branches were downed by sixty mph winds.A severe thunderstorm brought large hail and damaging winds east and southeast of Beardsley in Big Stone county. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.Big Stone County1 W Ortonville Arpt 12 1640CST 0 0 Hail (1.00)Big Stone County3 SSE Beardsley 12 1645CST 0 0 Thunderstorm Wind (61EG)Seventy mph winds were estimated southeast of Beardsley with no damage reported.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Big Stone County4 SE Odessa 12 1700CST 0 0 Hail (0.88)Big Stone County4 SE Odessa 12 1700CST 0 0 Thunderstorm Wind (52EG)MISSISSIPPI, CentralSixty mph winds downed several large tree branches.Severe thunderstorms brought quarter size hail along with winds up to seventy mph to parts of Big Stone county. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.MSZ018-025>066-072>074Adams - Attala - Bolivar - Carroll - Choctaw - Claiborne - Clarke - Clay - Copiah - Covington - Forrest -Franklin - Grenada - Hinds - Holmes - Humphreys - Issaquena - Jasper - Jefferson - Jefferson Davis -Jones - Kemper - Lamar - Lauderdale - Lawrence - Leake - Leflore - Lincoln - Lowndes - Madison -Marion - Montgomery - Neshoba - Newton - Noxubee - Oktibbeha - Rankin - Scott - Sharkey - Simpson -Smith - Sunflower - Warren - Washington - Webster - Winston - Yazoo01040000CST2000CST 3 0 0.00K 0.00K Excessive HeatA four day stretch of extreme temperatures occurred across the region to start off the month of August. High pressure wasfirmly entrenched across the southeast and allowed temperatures to soar into the triple digits across much of the region. Acrossthe NWS Jackson, MS forecast area, 19 record highs were set between August 1st and 4th. On August 2nd, the 2nd warmestaverage temperature was recorded. The low was 78 and the high 105, this resulted in an average temperature of 91.5 degrees.Additionally, relatively high humidity levels made conditions even more oppressive, with heat index readings surpassing 110degrees in many areas. This extreme heat resulted in 3 fatalities across the forecast area. M84OU01310000CST2359CST 0 0 0.00K 500.0K DroughtMSZ019-034-040-041Issaquena - Sharkey - Sunflower - Washington01310000CST2359CST 0 0 0.00K 2.0M DroughtVery dry conditions continued across west-central portions of Mississippi during August. The dry stretch resulted in severe(D2) drought conditions continuing across parts of the Mississippi Delta region despite a few locations receiving above normalrainfall for the month. Crops were put under more stress from the hot and dry conditions. The likely impact will be less cropyields when harvest arrives in early Fall.Hinds CountyTerry 02 1710CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down across Terry Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.239

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralHinds CountyTerry 02 1715CST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Six large oak trees were blown down in Terry. Power lines were also reported down in the same area.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Copiah County3 SE Allen 03 1345CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A power line was reported down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Choctaw County2 NW Weir 03 1405CST 0 0 15.00K 0.00K Thunderstorm Wind (55EG)Some trees were down on power lines. In the same area, a porch was blown off of a house.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Webster County1 E Bellefontaine 03 1508CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A few trees, a power line, and a power pole was blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson Davis County4 N Mt Carmel 03 1520CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Three trees were blown down around Clem.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson Davis County1 NE Carson 03 1547CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A few power lines were blown down around Carson.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clarke County1 W Sable 03 1600CST 0 0 4.00K 0.00K Thunderstorm Wind (40EG)One tree was blown down which took out a power pole.Note: The estimated wind gust of 40 knots is equivalent to 46 mph.Rankin County2 E Flowood 03 1625CST 0 0 15.00K 0.00K Thunderstorm Wind (43EG)An 18 wheeler was blown over along Interstate 20.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Jasper County1 ENE Bay Spgs 03 1626CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)An awning was blown off of the Jasper County Sheriff's Office.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hinds County1 W Dry Grove 03 1632CST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)A power line was blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jones County1 NE Tuckers 03 1635CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An estimated wind gust of 60 miles per hour was reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.240

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralNewton CountyHickory 03 1637CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A few trees were blown down, with 1 large limb falling on a truck causing some damage.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jones County1 W Sandersville 03 1640CST 0 0 25.00K 0.00K Thunderstorm Wind (52EG)Trees were down along the Norfolk Southern Railroad. Train traffic was backed up to New Orleans due to the blocked railroad.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lauderdale County1 SE Collinsville 03 1700CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were blown down in the Collinsville area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jones County2 SSW Sandersville 03 1705CST 0 0 0.00K 0.00K Hail (1.00)Jones County1 E Errata 03 1705CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down and power outages were reported.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jones County2 SSE Errata 03 1710CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were down along Magnolia Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Forrest County1 ESE Petal 03 1845CST 0 0 25.00K 0.00K LightningTwo houses were struck by lightning near Petal.Forrest County1 ESE Petal 03 1845CST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)Four trees were reported down, and there was damage to a gas station roof.Scattered showers and thunderstorms developed during the afternoon and evening hours of the 2nd and 3rd. Some of the stormsproduced wind damage as this activity occurred in triple digit heat. Some lightning damage was also reported. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.Rankin County4 SW Johns 04 1244CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Some trees were blown down on Cato Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Leake County2 W Edinburg 04 1340CST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)The roof of an outbuilding was damaged, a utility line was blown down, and tree damage occurred.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin County1 SE Flowood 04 1405CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Large limbs and power lines were down on Pemberton Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.241

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralHinds County1 N Taylorsville 04 1410CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees were down in south Jackson. Numerous power outages were reported in the Jackson Metro Area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Forrest County2 WNW Hattiesburg 04 1420CST 0 0 4.00K 0.00K Thunderstorm Wind (45EG)A few tree limbs took down a power line along North 40th Avenue.Note: The estimated wind gust of 45 knots is equivalent to 52 mph.Jefferson Davis County4 N Mt Carmel 04 1420CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down along Hartzog-Magee Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Newton CountyUnion 04 1420CST 0 0 100.00K 0.00K Thunderstorm Wind (50EG)Several trees and limbs were down. One large tree fell on a house and destroyed it.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Newton County1 E Stratton 04 1430CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down on Stratton Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Forrest County5 S Bonhomie 04 1435CST 0 0 10.00K 0.00K LightningA mobile home was struck by lightning.Forrest County1 SW Hattiesburg 04 1435CST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on a house.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hinds County1 N Clinton 04 1440CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A number of trees and power lines were down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hinds CountyTerry 04 1445CST 0 0 1.00K 0.00K Thunderstorm Wind (45EG)A couple trees were blown down in Terry, with a tree also blocking Terry Road.Note: The estimated wind gust of 45 knots is equivalent to 52 mph.Newton County6 N Chunky 04 1450CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down on Chunky-Duffee Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jasper County1 N Turnerville 04 1510CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down along Mississippi Highway 18 near Antioch Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.242

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralJasper County2 E Bay Spgs 04 1530CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down along Highway 528. Power outages were also reported in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Holmes County1 W Goodman 04 1545CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down around Goodman.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jasper County2 NNE Heidelberg 04 1545CST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were blown down along County Road 35.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hinds County1 S Utica 04 1604CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Several large limbs and a couple of trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lowndes County3 SSW New Hope 04 1825CST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were blown down along Highway 69 and on power lines, resulting in power outages.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Noxubee County2 SW Macon Muni Arpt 04 1850CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Several large limbs were blown down.Showers and thunderstorms developed during the afternoon and evening hours of August 4th. Some of the storms produceddamaging winds. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Simpson County1 ENE Magee 05 1200CST 0 0 15.00K 0.00K Thunderstorm Wind (55EG)Power lines were blown down along Dry Creek Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Simpson County1 SW Merit 05 1210CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Trees were blown down along Highway 43.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Simpson County1 SE Braxton 05 1216CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down along Cox Road near Highway 49.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Copiah County1 E Gallman 05 1222CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A few trees were blown down in Gallman.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Copiah County1 N Crystal Spgs 05 1225CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was down on Interstate 55 west of Crystal Springs.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.243

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralRankin County1 ENE Lakeland 05 1240CST 0 0 15.00K 0.00K LightningLightning struck an apartment in Richland, causing minor damage.Hinds County1 WNW Spring Ridge 05 1240CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down on Owens Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin CountyFlorence 05 1240CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A few trees were down just outside of the city limits.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin CountyValue 05 1255CST 0 0 0.00K 0.00K Hail (0.75)Rankin County2 N Rice Hill 05 1255CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down in the Crossgates Subdivision.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin County1 N Value 05 1300CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down along Highway 471 near Brandon.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hinds County1 W Dry Grove 05 1305CST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were down in the Dry Grove Community.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin County2 WNW Rice Hill 05 1305CST 0 0 17.00K 0.00K Thunderstorm Wind (50EG)Trees were down in Pearl, and a tree fell on two vehicles.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin County3 WSW Luckney 05 1305CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Power lines were down along Lakeland Drive in Flowood near the Pearl River.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison County2 E Madison 05 1310CST 0 0 75.00K 0.00K LightningLightning caused a house fire on Knights Bridge Road in Madison, resulting in major structural damage.Hinds County2 NNW Jackson 05 1315CST1325CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Trees were down in several spots in Jackson. Power lines were down on Northside Drive.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.244

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralRankin County3 NE Flowood 05 1325CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was down along Airport Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison County4 WSW Farmhaven 05 1338CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison County1 E Flora 05 1345CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An estimated wind gust of 60 miles per hour was reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Madison County1 W Camden 05 1350CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several trees were down in the Camden area. A few trees were across roadways.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Choctaw CountySherwood 05 1406CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Trees and power lines were reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Madison County1 E Mansdale 05 1410CST1440CST 0 0 3.00K 0.00K Flash FloodWater was covering the road at the intersection of Cedar Hill Road and Mannsdale Road.Warren County4 ESE Grange Hall 05 1415CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down along Fontsylvania Road. Power outages were also reported in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Warren County2 SSE Vicksburg 05 1420CST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)Utility lines were down in the city of Vicksburg.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Oktibbeha County3 ENE Osborn 05 1430CST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)A couple of trees and power lines were down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Attala County1 NW Kosciusko 05 1440CST 0 0 10.00K 0.00K Thunderstorm Wind (53EG)Power lines were down in Kosciusko. Power outages were reported across Attala County.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Grenada County2 NNW Tie Plant 05 1440CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were down along Carrollton Avenue in Grenada. There were several power outages in the area as well.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.245

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralChoctaw County2 ESE Tollison 05 1452CST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Several trees and power lines were blown down.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Clay County2 ENE Tibbee 05 1457CST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)Several trees and power lines were blown down, with widespread power outages.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lowndes County2 SSW Billups 05 1525CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A few trees and power lines were down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lowndes County3 WSW Columbus/lowndes Co 05 1540CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A few trees and power lines were down.Numerous showers and thunderstorms developed during the afternoon hours of August 5th. This round of storms essentiallybroke the heat wave which started the month. The atmosphere was primed for severe storms this day and several thunderstormsbrought damaging winds, hail, and locally heavy rain. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bolivar CountyShelby 07 0900CST1000CST 0 0 5.00K 0.00K Flash FloodNumerous streets in Shelby were flooded with up to 3 feet of water.Neshoba County1 E Philadelphia 07 1436CST 0 0 10.00K 0.00K LightningA tree and a vehicle were struck by lightning and caught on fire at a residence in Philadelphia.Rankin County2 SSE Greenfield 09 1625CST 0 0 0.00K 0.00K Hail (0.75)Dime to penny sized hail was reported.Rankin CountyMontery 09 1627CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A few trees and power lines were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Claiborne County1 N Pattison 09 1630CST 0 0 7.00K 0.00K Thunderstorm Wind (50EG)A few trees were down on power lines.Showers and thunderstorms developed during the afternoon and evening hours of August 7th and 9th. Some of thethunderstorms brought heavy rain, damaging winds, and some hail. Note: The estimated wind gust of 50 knots is equivalent to58 mph.Adams County2 SSE Natchez 13 0811CST 0 0 0.00K 0.00K Heavy RainThe Natchez E.O.C. reported 2.54 inches of rain since 7 am.Adams County1 SSW Natchez 13 0820CST0920CST 0 0 5.00K 0.00K Flash FloodA portion of North Wall Street had 14 to 16 inches of water covering the road. The water did approach the base of one home.246

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralJefferson County2 SSW Fayette2 SE Harriston13 0955CST1010CST 0 0 5.00K 0.00K Flash FloodSeveral low lying county roads were covered with water. An estimated 3 to 5 inches of rain was reported.Smith County3 SSW Raleigh 13 1230CST 0 0 1.10M 0.00K LightningA storage tank was struck by lighting and caused the tank to catch fire. The initial fire spread to two other tanks engulfing three1000 gallons tanks into a huge fire. Each tank had a small amount of crude oil and salt water in them.Jefferson Davis County1 S Prentiss 13 1245CST1440CST 0 0 200.00K 0.00K Flash FloodLocally heavy rainfall, between 3 and 4 inches, quickly fell across portions of Jefferson Davis County, especially acrossPrentiss. Numerous streets were under water with several roads closed. Traffic had to be redirected around town. A fewbusinesses were flooded due to the high water.Jefferson Davis County1 E Prentiss 13 1330CST 0 0 0.00K 0.00K Heavy RainThe Prentiss Fire Department measured 3.72 inches of rain.Rankin CountyPuckett 13 1335CST 0 0 7.00K 0.00K Thunderstorm Wind (50EG)Multiple power lines were down in the Puckett area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson Davis County2 SW Mt Carmel 13 1400CST 0 0 0.00K 0.00K Heavy RainThere was 2.90 inches of rain reported on Hall Lane northeast of Prentiss.Madison County2 ESE Shocco 13 1406CST 0 0 15.00K 0.00K Thunderstorm Wind (57EG)Trees were uprooted and numerous power lines were down around Holmes Hollow Lane, Whiddon Road, Saint CatherineRoad, and Allenwood Drive. One home experienced damage due to a fallen tree.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Lauderdale County1 NE Meridian 13 1541CST1650CST 0 0 20.00K 0.00K Flash FloodSeveral roads in downtown Meridian were under water. One motorist was trapped in a car, but was able to get out safely.Lauderdale County2 NNE Lost Gap 13 1600CST1700CST 0 0 25.00K 0.00K Flash FloodStanding water was reported at the intersection of Interstates 59 and 20 near Meridian, with 3 accidents reported.Lauderdale County1 NE Meridian 13 1630CST1730CST 0 0 40.00K 0.00K Flash FloodThere were reports of several vehicles stranded due to flash flooding in Meridian.247

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralWinston County1 S Louisville 14 1645CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A few trees were reported down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Noxubee County2 WSW Bigbee Vly 14 1924CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Numerous large limbs were down, partially blocking Highway 388 for a short period of time.Showers and thunderstorms occurred across the region on August 13th and 14th. Some of the storms produced damaging windsand torrential rain, which resulted in some flash flooding. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Winston County1 WNW Ross 15 1400CST 0 0 10.00K Thunderstorm Wind (52EG)A few trees were downed on power lines.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Neshoba County5 NW Philadelphia 15 1440CST 0 0 3.00K 0.00K LightningLightning struck a home and caused minor damage.Neshoba County1 E Longino 15 1445CST 0 0 20.00K Thunderstorm Wind (52EG)Several trees down in the area including a 36 inch diameter tree that was blown onto a house. Also, lightning struck a housenorthwest of Philadelphia.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Choctaw County1 SW Weir 15 1520CST 0 0 5.00K Thunderstorm Wind (43EG)A large oak tree fell on a deck and damaged the deck.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Kemper County2 WSW Klondike 15 1521CST 0 0 5.00K Thunderstorm Wind (43EG)One tree fell on a power line.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Lauderdale County1 N Suqualena 15 1525CST 0 0 20.00K Thunderstorm Wind (56EG)Scott County2 S Forest Muni Arpt1 NE OthoTrees and power lines were downed in the area.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.15 1542CST1549CST 0 0 15.00K Thunderstorm Wind (55EG)Several trees were downed along with a few signs one to two miles south of Forest along Highway 35S. A few trees were alsodowned along Highway 501 east of Homewood.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Forrest County1 SW Brooklyn 15 1558CST 0 0 10.00K Thunderstorm Wind (53EG)Several trees were downed in the area. A few were on power lines, and one was down across Highway 49.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.248

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralSmith County1 ESE Trenton 15 1602CST 0 0 5.00K Thunderstorm Wind (53EG)Rankin County1 ENE FlorenceClearyTrees downed along County Road 563 as well as Highway 481.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.15 1610CST1613CST 0 0 25.00K Thunderstorm Wind (55EG)Nine trees were downed around Florence. A barn off Cleary Road west of Florence was blown down, with parts of the tin roofscattered for over a hundred yards.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Forrest CountyRawls Spgs 15 1625CST 0 0 5.00K Thunderstorm Wind (50EG)A tree and a power line were downed in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Smith County1 E Raleigh 15 1625CST 0 0 50.00K Thunderstorm Wind (55EG)Several trees were downed along Highway 18 in the city of Raleigh. Many utility customers were without power for up to 8hours.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Simpson County3 NW Harrisville 15 1630CST1633CST 0 0 20.00K Thunderstorm Wind (57EG)Several trees and power lines were downed across northwest Simpson County.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Clarke County2 ESE Pachuta 15 1643CST 0 0 Thunderstorm Wind (50EG)A few trees were downed off Highway 18 just southeast of Pachuta.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Copiah County2 NW Georgetown 15 1645CST 0 0 Thunderstorm Wind (50EG)Trees were downed along Brushy Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Simpson County2 SSE Braxton 15 1647CST 0 0 12.00K 0.00K Thunderstorm Wind (55EG)Trees and power lines downed in the area.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Copiah County1 NE Crystal Spgs 15 1650CST 0 0 10.00K 0.00K Thunderstorm Wind (53EG)Power lines and trees downed in Crystal Springs.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Simpson County1 NE Mendenhall 15 1652CST1655CST 0 0 25.00K Thunderstorm Wind (55EG)Trees were blown down along Merit Road near D'Lo, along Cooper Road south of Mendenhall, and trees and power lines weredowned in the town of Mendenhall.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.249

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralLamar County3 NNW Talowah 15 1707CST 0 0 Thunderstorm Wind (50EG)A couple trees were blown down in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Simpson County1 NE Pinola 15 1715CST 0 0 15.00K Thunderstorm Wind (55EG)A few power lines were downed in town.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Covington County1 NE Mt Olive 15 1720CST 0 0 15.00K 0.00K Thunderstorm Wind (53EG)Trees downed onto power lines in the town of Mount Olive.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Copiah CountyGlancy 15 1730CST 0 0 10.00K Thunderstorm Wind (50EG)A couple trees, as well as 2 power lines, were downed in the Glancy community.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson Davis County1 E Prentiss 15 1747CST 0 0 Thunderstorm Wind (50EG)Trees were downed in Prentiss.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lawrence CountySilver Creek 15 1748CST 0 0 Thunderstorm Wind (50EG)A few trees were downed in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lincoln County2 SSW Cam 15 1809CST 0 0 13.00K 0.00K Thunderstorm Wind (50EG)A few trees and some power lines were downed between Brookhaven and Ruth. Exact location is unknown.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson Davis County1 NE Carson 15 1810CST 0 0 Thunderstorm Wind (50EG)Trees were reported down in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Marion County3 ENE Cheraw 15 1811CST 0 0 Thunderstorm Wind (50EG)Several tree limbs downed southeast of Columbia.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lawrence County1 SW Jayess 15 1825CST 0 0 Thunderstorm Wind (50EG)A few trees were reported down in Jayess.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lowndes County3 W Steens 15 1830CST 0 0 25.00K Thunderstorm Wind (50EG)Trees and power lines were downed off Highway 373 and a few trees were downed along Highway 12 northeast of Columbus.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.250

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralMarion CountyColumbia 15 1834CST1850CST 0 0 12.00K 0.00K Thunderstorm Wind (55EG)The Emergency Manager recorded a 60 mph wind gust. Also, several trees were downed along New Hope Road, as well asalong Highway 587 between Morgantown and Foxworth. Numerous tree limbs were downed along with a tree across a road inthe community of Sandy Hook.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lowndes County1 N Interstate City 15 1850CST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Marion County1 SSE FortenberryLovelaceLowndes 911 reported several trees downed in the city.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.15 1910CST1945CST 0 0 5.00K 0.00K Flash FloodSeveral inches of water were flowing across a road 5 miles southeast of Columbia. A few streets were flooded around the townof Columbia as well.Attala County5 ENE Newport 15 1915CST 0 0 Thunderstorm Wind (50EG)A few trees were downed in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lauderdale County1 E Lauderdale 15 1922CST 0 0 Thunderstorm Wind (50EG)Several trees were blown down in the community of Lauderdale.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Noxubee County2 W Bigbee Vly 15 1924CST 0 0 Thunderstorm Wind (50EG)Numerous large tree limbs were downed in the area. Highway 368 was partially blocked for a short while.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Leake County2 WSW Thomastown 15 1925CST 0 0 Thunderstorm Wind (50EG)A few trees were downed in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Leake County2 SSE Edinburg 15 1926CST 0 0 30.00K Thunderstorm Wind (50EG)A few trees and power lines were downed along Highway 427 at Ebenezer Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Leake CountyTuscola 15 1935CST 0 0 Thunderstorm Wind (50EG)A couple trees were blown down in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Webster County3 ESE Cadaretta 15 1940CST 0 0 Thunderstorm Wind (50EG)A few trees were downed across Highway 404 blocking the road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.251

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralScott County1 NE Hillsboro1 SW Raworth15 2015CST2025CST 0 0 15.00K 0.00K Thunderstorm Wind (55EG)Numerous trees were downed along Highway 35 in and around Hillsboro. Numerous trees were also downed around Forest andalong Highway 35 just north of the town. A couple trees were downed just west of Morton as well.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Neshoba County4 NNE Spring Creek 15 2037CST 0 0 Thunderstorm Wind (55EG)Neshoba County1 SE Longino2 WSW WilliamsvilleSeveral trees were downed along CR 577 and 832.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.15 2055CST2103CST 0 0 50.00K 0.00K Thunderstorm Wind (63EG)Numerous trees were blown down around Philadelphia. These included locations along CR 428 and 355 near Highway 485, aswell as along CR 424 and Highway 21 just north of the fairgrounds.Note: The estimated wind gust of 63 knots is equivalent to 72 mph.Webster County1 N Eupora 15 2055CST 0 0 Thunderstorm Wind (50EG)Three trees were downed in Eupora and one of the trees was across a road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Scott County1 NW Kalem 15 2148CST 0 0 Thunderstorm Wind (50EG)Multiple trees were blown down along Kalem Road between Morton and Forest.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Winston County4 SSW Mc Millan 15 2152CST 0 0 Thunderstorm Wind (53EG)Trees were downed along Highway 14 just west of Louisville near Whitehall Church.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Leake County1 W Thomastown 15 2155CST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were downed along old Pickens Road and Highway 429.An extremely warm and moist airmass was in place over the region on the morning of August 15th. Abundant sunshine duringthe morning hours led to the development of extremely high atmospheric instability by early afternoon. This environment led tonumerous severe thunderstorms throughout the day, continuing into the evening hours. Numerous damaging wind reports werereceived, including several reports of damage caused by a strong outflow boundary that surged south across the forecast area.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Adams County2 W Sibley 18 0800CST1530CST 0 0 1.00M 50.00K Flash FloodExtreme heavy rain occurred across portions of southern Adams County as the remnants of TD5 slowly moved across the area.Rainfall totals between 5 and 10 inches fell across this area during the morning hours. Significant flash flooding occurredacross the Sibley area. Many roads were flooded with several washed out with a bridge damaged along Bourke Road. Somehomes and a few businesses were flooded and several mudslides occurred due to the extensive rainfall.252

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralRadar estimated storm total precipitation for the significant rain event across southwest Mississippion August 18th, 2010. Extreme totals between 5 and 10 inches fell across portions of Adams County, MS,during a 4 hour period. This event occurred as the remnants of Tropical Depression 5 slowly moved across the area.Adams County2 W Sibley 18 0800CST0945CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall measured at 7.00 inches. One inch of rain fell prior to 6 am. Six inches of rain fell between 6 am and 1030am.Adams County4 N Sibley 18 0800CST1430CST 0 0 0.00K 0.00K Heavy RainA report from a Cocorahs observer near Sibley of 10.74 inches, which fell over a 24 hour period. A measure of 10.23 inches ofrain fell since 7 am.Adams CountySibley 18 0800CST1030CST 0 0 0.00K 0.00K Heavy RainCocorahs observer measured 8.66 to 9 inches of rainfall.Adams County1 SSW Natchez 18 0840CST1200CST 0 0 110.00K 0.00K Flash FloodAs extreme rain occurred across the southern portion of the county, locations near and just to the south of Natchez receivedlocally heavy rain between 2 and 6 inches. Several roads were flooded along with a few homes. A few of the roads had to beclosed due to high water covering them.Scott County3 ENE Raworth3 ENE Forest19 0800CST1100CST 0 0 800.00K 0.00K Flash FloodVery heavy rainfall, between 3 and 6 inches, occurred across portions of Scott County during the morning hours of August19th. This rainfall event resulted in several homes and businesses flooded along with 15 people being evacuated from highwater. Several vehicles were trapped in flood waters and many roads and streets were closed.253

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralScott County1 WSW Forest Muni Arpt 19 0830CST1100CST 0 0 0.00K 0.00K Heavy RainRainfall amount of 5.66 inches fell at the Bienville National Forest Raws site. It fell mainly between 5 am and 10 am cst.The remnants of Tropical Depression 5 (TD5) pushed northward over the western portion of the region during the period. Onthe 18th, TD5 caused some torrential downpours and extreme rainfall totals across a small portion of the forecast area whichproduced some substantial flooding over portions of southwest Mississippi. The rainfall totals were extreme across portions ofAdams County, with a sizable portion of the county receiving 5 to 10 inches.Early on the 19th, the remnants of TD5 caused some localized flooding in Scott County, which resulted in some evacuationsand several flooded roads. During this event, rainfall totals ranged from 3 to 5 inches.Lauderdale County3 N Kewanee 22 1330CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down along Kewanee Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lauderdale County2 E Zero 22 1400CST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down along Highway 19 south southeast of Meridian.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lauderdale County1 ENE Okatibbee 22 1413CST 0 0 8.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down along T.M. Jones Road south of Meridian. A couple of trees were blown down along 65th Avenue inMeridian.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin CountyValue 22 1420CST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Large tree limbs and branches with diameters of at least 2 inches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison County1 WNW Madison Station 22 1426CST 0 0 1.30K 0.00K Thunderstorm Wind (50EG)A tree was snapped and numerous large limbs were blown down on Gluckstadt and Dewees Roads.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison County2 SSW Madison 22 1440CST 0 0 30.00K 0.00K Thunderstorm Wind (60EG)Large trees were blown down along with power lines at Jones Street and Main Street. There were multiple other reports of treesdown around the city of Madison.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Holmes County3 WNW Franklin 22 1502CST 0 0 2.00K 0.00K Thunderstorm Wind (57EG)Several trees were blown down along Highway 17.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Holmes County2 NNW Franklin 22 1510CST 0 0 1.00K 0.00K Thunderstorm Wind (53EG)Trees were blown down along Highway 17 southeast of Lexington.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.254

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralNewton County2 S Prospect 22 1520CST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin County1 S Puckett 22 1520CST 0 0 3.00K 0.00K Thunderstorm Wind (57EG)A roof was blown off an outbuilding. Limbs were observed down on County Line Road.Note: The estimated wind gust of 57 knots is equivalent to 66 mph.Holmes County1 N Pickens 22 1525CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees and limbs were blown down around Pickens.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Neshoba County3 ESE Fairgrounds 22 1530CST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)Two large pine trees were blown down. A number of small pine and cedar trees were snapped. It was likely caused by anoutflow from a severe storm passing just west of the damaged location.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Newton County2 S Popular Spgs 22 1538CST 0 0 25.00K 0.00K Thunderstorm Wind (60EG)Multiple power lines were blown down along with some trees southeast of Newton.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Madison County1 W Camden 22 1545CST 0 0 12.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down on Highway 17, Loring Road, and Rocky Hill Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Scott County1 S Lake 22 1549CST1551CST 0 0 500.00K 0.00K Thunderstorm Wind (65EG)A roof was blown off of a portion of Lake Elementary School. A total of five classrooms and a library were affected. Baseballlight poles were blown down and some field houses were blown across the field into an adjacent property.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Washington County1 E Hollandale 22 1600CST 0 0 5.00K 0.00K Thunderstorm Wind (60EG)Numerous trees were blown down in the area around Hollandale.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Jasper County1 W Hero 22 1602CST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down near the Hero community.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.MSZ074Forrest22 1610CST 0 0 1.0K 0.00K Strong Wind255

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralSharkey County1 NW Rolling Fork 22 1630CST 0 0 200.00K 0.00K Thunderstorm Wind (65EG)MSZ057A strong microburst caused damage to a few homes and downed several power lines. Trees were blown down in Rolling Forkas well.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Jasper22 1640CST 0 0 0.5K 0.00K Strong WindSmith County2 ENE Polkville 22 1651CST 0 0 20.00K 0.00K Thunderstorm Wind (58EG)Multiple power lines and trees blown down in the Polkville area.Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Jones County2 ENE Tawanta 22 1655CST1659CST 0 0 10.00K 0.00K Thunderstorm Wind (60EG)Numerous trees were blown down across southern Jones County.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Scott County1 NE Hillsboro 22 1658CST1720CST 0 0 2.00K 0.00K Flash FloodSeveral streets were flooded in the Hillsboro Community.Covington County3 SSW Collins 22 1710CST 0 0 15.00K 0.00K Thunderstorm Wind (55EG)Scattered trees were blown down across roads in Covington County.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Scott County1 WNW Forest 22 1715CST1810CST 0 0 15.00K 0.00K Flash FloodMSZ047Water covered Highway 501 south of Forest. Water also covered the intersection of Highway 35 and Highway 80 in the ForestCommunity.Warren22 1720CST 0 0 6.0K 0.00K Strong WindClaiborne County2 W Westside 22 1741CST 0 0 100.00K 0.00K Thunderstorm Wind (65EG)Numerous power poles and trees were blown down across western Claiborne County.Jones County2 NW Laurel1 ESE (LUL)Hesler Fld LaurNote: The estimated wind gust of 65 knots is equivalent to 75 mph.22 1745CST1830CST 0 0 15.00K 0.00K Flash FloodStreet flooding was observed in downtown Laurel on Teresa, Ellisville, and Jefferson Streets.Jefferson Davis County1 E Bassfield 22 1745CST 0 0 8.00K 0.00K Thunderstorm Wind (50EG)A few trees were blown down around Bassfield on Rogers Road, Sims Lane, and Stubbs Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.256

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, CentralAdams County1 E Stanton 22 1842CST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)Trees were blown down on Tate, Wickcliiffe, and Duckpond Roads. Power lines were reported down on Artman Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Rankin County2 WNW Langford 22 1850CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous limbs and branches were blown down. Some of the larger ones were down near the intersection of Eastside Driveand Rustic Drive just north of Lakeland Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rankin County1 WSW Langford 22 1852CST 0 0 50.00K 0.00K Thunderstorm Wind (55EG)Trees and power lines were blown down in the Castlewoods Subdivision. Six hundred and twenty five customers lost power.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Copiah County1 SSW Martinsville 22 1908CST 0 0 25.00K 0.00K Thunderstorm Wind (56EG)A Copiah County icon was blown down from thunderstorm winds during the early evening of August 22nd. This icon was abarn which stood in a pasture just off Interstate 55 in central Copiah County. The Rainbow Barn as it was known, survivedmany storms over the years, even Hurricane Katrina. However, the weakened structure failed and was blown down by a stormon the evening of August 22nd.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Copiah CountyWesson 22 1912CST 0 0 60.00K 0.00K Thunderstorm Wind (58EG)Multiple power lines and trees were blown down around Wesson.Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Lawrence County3 W New Hebron 22 1950CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)MISSISSIPPI, NorthA few trees were blown down west of New Hebron.The combination of a weak front, strong upper disturbance, and daytime heating, increased instability and brought a round ofsevere storms to the region on the afternoon and evening of August 22. These storms produced wind damage along withisolated instances of flash flooding. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.MSZ010Coahoma01310000CST2359CST 0 0 0.00K DroughtBelow normal rainfall continued during the month of August which expanded severe (D2) drought conditions to additionalportions of Northwest Mississippi. The biggest impact from the drought was on agriculture as many crops suffered due to thelack of rainfall.MSZ001-007>008-010>016-020>023Calhoun - Chickasaw - Coahoma - De Soto - Lafayette - Lee - Marshall - Panola - Pontotoc - Quitman -Tallahatchie - Tate - Tunica - Union - Yalobusha01050900CST1800CST 0 0 0.00K 0.00K Excessive HeatMSZ003>006-009-017-024Alcorn - Benton - Itawamba - Monroe - Prentiss - Tippah - Tishomingo010202050900CST 0 0 0.00K 0.00K Heat0900CST1800CST 0 0 0.00K 0.00K Excessive Heat257

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, NorthMSZ004>006-009-017-024Alcorn - Itawamba - Monroe - Prentiss - Tippah - Tishomingo02050900CST1800CST 0 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing from the end of July into the beginningof August. The upper ridge of high pressure produced above normal temperatures over the area. The combination of highhumidity and above normal temperatures produced brutal heat indices of 105-120 degrees.MSZ007-011Quitman - Tunica03310500CST2359CST 0 0 0.00K DroughtBelow normal rainfall continued during the month of August which expanded severe (D2) drought conditions to additionalportions of Northwest Mississippi. The biggest impact from the drought was on agriculture as many crops suffered due to thelack of rainfall.Marshall CountyWarsawWatson05 1536CST1541CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked down two 20 ft. tall aluminum flag poles and several trees between Watson and Warsaw. Shingleswere also blown off of a couple of homes. Lawn furniture was tossed around as well.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Quitman CountySledge 05 1600CST1610CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked down a few trees in Sledge. One tree fell on top of a fence causing damage.An upper ridge of high pressure continued to weaken over the Mid-South August 5th allowing a few diurnal showers andthunderstorms to develop over North Mississippi. A few storms produced damaging winds. Note: The estimated wind gust of50 knots is equivalent to 58 mph.MSZ001-007-010>016-020>023MSZ002>006-009-017-024Calhoun - Chickasaw - Coahoma - De Soto - Lafayette - Lee - Panola - Pontotoc - Quitman - Tallahatchie -Tate - Tunica - Union - Yalobusha08100900CST 0 0 0.00K 0.00K HeatAlcorn - Benton - Itawamba - Marshall - Monroe - Prentiss - Tippah - Tishomingo09130900CST 0 0 0.00K 0.00K HeatMSZ001De Soto10150900CST1800CST 0 0 0.00K 0.00K Excessive HeatMSZ002>017-020>024Alcorn - Benton - Calhoun - Chickasaw - Coahoma - Itawamba - Lafayette - Lee - Marshall - Monroe -Panola - Pontotoc - Prentiss - Quitman - Tallahatchie - Tate - Tippah - Tishomingo - Tunica - Union -Yalobusha13150900CST1800CST 0 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing into the middle of August. The upperridge of high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced brutal heat indices of 105-120 degrees.Alcorn CountyCorinth Turner Arpt 15 1520CST1525CST 0 0 0.00K Thunderstorm Wind (50EG)258

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, NorthStraight line winds knocked down trees and caused roof damage to a few homes near the Corinth Airport. One home had theroof and porch ripped off while another home had a carport damaged.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Tishomingo CountyDoskie 15 1605CST1615CST 0 0 0.00K Thunderstorm Wind (50EG)MSZ010>013-015>017-020>024Straight line winds knocked down several trees in Doskie.A cold front moved into the Mid-South on August 15th, 2010. Scattered showers and thunderstorms developed along the front.Some storms became severe and produced damaging winds. Note: The estimated wind gust of 50 knots is equivalent to 58mph.Calhoun - Chickasaw - Coahoma - Itawamba - Lafayette - Lee - Monroe - Panola - Pontotoc - Quitman -Tallahatchie - Yalobusha16 0900CST1800CST 0 0 0.00K 0.00K HeatAn upper level ridge of high pressure remained over the Mid-South during the middle part of August. The upper ridge of highpressure produced above normal temperatures over the area. The combination of high humidity and above normal temperaturesproduced high heat indices of 105-109 degrees.Tippah CountyWalnut 18 1120CST1300CST 0 0 15.00K 0.00K Flash FloodHeavy rain produced widespread flash flooding across Tippah County. County Road 200 and County Road 240 near Falknerwere flooded as a result. In addition, County Road 237 was flooded along with several streets in Walnut. Several culverts werewashed out in Tiplersville.Alcorn CountyTheo 18 1130CST1400CST 0 0 0.00K 0.00K Flash FloodHeavy rain produced flash flooding along Highway 72 near the Union Center Fire Department.Remnants of Tropical Depression 5 moved northward into the Mid-South during the day on August 18th, 2010. Showers andthunderstorms developed in association with the Tropical Depression 5. Some storms produced very heavy rain which causedflash flooding.MSZ010-020Coahoma - Quitman - Tallahatchie19210900CST1800CST 0 0 0.00K 0.00K Excessive HeatMSZ001-012-021MSZ002>004-007>008-013MSZ001>009-012>017-021>024De Soto - Panola - Yalobusha19210900CST 0 0 0.00K 0.00K HeatBenton - Lafayette - Marshall - Tate - Tippah - Tunica20210900CST 0 0 0.00K 0.00K HeatAlcorn - Benton - Calhoun - Chickasaw - De Soto - Itawamba - Lafayette - Lee - Marshall - Monroe -Panola - Pontotoc - Prentiss - Tate - Tippah - Tishomingo - Tunica - Union - Yalobusha21 0900CST1800CST 0 0 0.00K 0.00K Excessive Heat21221800CST 0 0 0.00K 0.00K Heat259

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, NorthMSZ002>017-020>024Alcorn - Benton - Calhoun - Chickasaw - Coahoma - Itawamba - Lafayette - Lee - Marshall - Monroe -Panola - Pontotoc - Prentiss - Quitman - Tallahatchie - Tate - Tippah - Tishomingo - Tunica - Union -Yalobusha21 1800CST 0 0 0.00K 0.00K Heat22An upper level ridge of high pressure remained over the Mid-South during the middle to latter part of August. The upper ridgeof high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced high heat indices of 105-115 degrees.Panola CountyPleasant Grove 22 0125CST0130CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked several trees down along Highway 315 in Pleasant Grove.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Panola County4 WSW Shuford 22 0200CST0205CST 0 0 0.00K Thunderstorm Wind (50EG)MISSISSIPPI, SouthStraight line winds uprooted several trees near Enid Lake in Panola County.A dying mesoscale convective system moved into the Mid-South during the late evening hours of August 21st, 2010. Some ofthe storms produced damaging winds that continued into the early morning hours of August 22nd, 2010. Note: The estimatedwind gust of 50 knots is equivalent to 58 mph.MSZ082Jackson02 1944CST 1 0 0.00K 0.00K Excessive HeatHot and humid conditions produced heat index values between 110 and 115 degrees over coastal Mississippi. M48EQPearl River CountyPoplarville 12 1540CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)The Sheriff's Office reported trees down on several roads in the county.An isolated thunderstorm produced wind damage in southern Mississippi. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Wilkinson County1 ESE Ft Adams 18 0900CST1030CST 0 0 0.00K 0.00K Flash FloodCulverts were washed out on several rural roadways in the Fort Adams area.Wilkinson CountyDoloroso 18 0900CST1000CST 0 0 0.00K 0.00K Flash FloodFlooding was reported on US Highway 61 in the Doloroso area.Slow moving thunderstorms associated with the remnant circulation of Tropical Depression Five produced heavy rainfall.Several flash flooding reports occurred in southwest Mississippi. This was the second passage of the remnant circulation ofTropical Depression 5 across the region.260

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSISSIPPI, SoutheastStone County1 ENE Wiggins 04 1642CST1643CST 0 2 0.00K 0.00K LightningFour individuals were struck by lightning at Flint Creek Water Park. Two of them were transported to a hospital.Stone CountyWiggins 04 1642CST1644CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Winds estimated at 60 mph downed trees and power lines in Wiggins.Thunderstorms produced gusty winds and lightning that caused damage in southeast Mississippi. Note: The estimated windgust of 52 knots is equivalent to 60 mph.George CountyAgricola 10 0900CST1000CST 0 0 0.00K 0.00K Flash FloodHeavy rainfall produced flooding of several streets in Agricola.Heavy rains produced flooding in parts of southeast Mississippi.MISSOURI, EastJefferson County1 SSE De Soto 05 0415CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds blew down numerous large tree limbs around town.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 NNW Danby 05 0438CST0440CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Numerous trees, tree limbs and power lines were blown down along and east of U.S. Highway 61 between Highway AA andthe Jefferson County/Ste. Genevieve County line. Some of the debris blocked U.S. Highway 61 so it had to be shut down tillater that day so the debris could be cleared off. One home sustained major damage from a fallen tree and tree limbs.Numerous homes in the area sustained minor roof and window damage. Some of the trees that were broken off at the groundwere 5 feet in diameter. An unoccupied travel trailer was rolled over twice causing major damage. No injuries were reported.A strong cold front moved through the region triggering showers and thunderstorms. A few of the storms produced damagingwinds. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.St. Charles County1 SW St Peters 10 1516CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds blew down numerous large tree limbs along Mexico Road in St. Peters.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Washington County5 N Pea Ridge 10 1615CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds blew down a large tree and a power line along Highway A in northern Washington County.St. Charles County3 S Wentzville1 E Wentzville ArptNote: The estimated wind gust of 52 knots is equivalent to 60 mph.10 1730CST1735CST 0 1 200.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds blew down numerous trees, tree limbs and power lines in an area from the Stone Meadows Subdivisionnortheastward towards the GM Plant that is north of I-70 and east of U.S. Highway 61. The width of the damage path wasabout half a mile to a mile wide. Also, numerous light poles were blown down in parking lots and a couple of small shedssustained minor to moderate damage. A semi was blown over onto a car on east bound I-70 near the Highway A exit. Oneperson sustained moderate injuries and was taken to a local hospital. In the Stone Meadows Subdivision, one house sustained alarge section of siding damage and a house two doors down lost about half of its roof.261

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, EastIsolated storms developed along an outflow boundary that was moving south through the forecast area. A few of the stormsproduced damaging winds. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.MISSOURI, LowerMOZ113-115Dunklin - Pemiscot02030900CST 0 0 0.00K 0.00K Heat03050900CST1800CST 0 0 0.00K 0.00K Excessive HeatMOZ115Pemiscot03050900CST1800CST 0 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing from the end of July into the beginningof August. The upper ridge of high pressure produced above normal temperatures over the area. The combination of highhumidity and above normal temperatures produced high heat indices of 105-115 degrees.MOZ113-115Dunklin - Pemiscot09150900CST1800CST 0 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing into the middle of August. The upperridge of high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced brutal heat indices of 105-120 degrees.MOZ1151921Pemiscot19210900CST 0 0 0.00K 0.00K Heat0900CST 0 0 0.00K 0.00K HeatMOZ113-115Dunklin - Pemiscot21 0900CST1800CST 0 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure remained over the Mid-South during the middle to latter part of August. The upper ridgeof high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced high heat indices of 105-115 degrees.MISSOURI, NortheastClark County3 NW Anson3 NE Athens09152030CST1650CST 0 0 250.00K 0.00K FloodHeavy rains during the second week of August resulted in the Des Moines River at St. Francisville going above the moderateflood stage level of 22 feet on August 9 around 930 pm CDT. It crested above the major flood stage level around 26.3 feetaround 1 pm CDT August 12. It fell below the moderate flood stage level around 550 pm CDT August 15.Scotland County1 S Memphis 13 2016CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph blew down some tree branches in Memphis, MO at 916 pm CDT August 13. Some trashcans were also being blown around the area.An area of showers and thunderstorms ahead of a cold front over central Iowa moved eastward into eastern Iowa, northernMissouri, and northern Illinois during the afternoon and evening of August 13. Damaging winds and flooding rainsaccompanied the stronger storms. High temperatures August 13 were mainly in the upper 80s to middle 90s. Heat indexreadings ranged from 100 to 110 degrees. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.262

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, NortheastScotland County1 S Memphis 20 1547CST1552CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated to be 60 mph were observed in Memphis, MO at 447 pm CDT August 20. The strong winds lasted forabout 5 minutes. A power outage was also observed.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Scotland County1 S Memphis 20 1550CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated to be 70 mph blew a 3 foot diameter tree down in Memphis, MO around 450 pm CDT August 20.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Scotland County1 S Memphis 20 1600CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Wind gusts estimated to be 65 mph blew down several tree limbs in Memphis, MO at 5 pm CDT August 20.Showers and thunderstorms moved across the area August 20 as a trough of low pressure moved into western Iowa. Some ofthe storms were severe downing trees and power lines. Torrential downpours also accompanied the storms with rainfall totals of1 to 2 inches in just an hour or two. Otherwise, warm and humid conditions prevailed across the region with high temperaturestopping out in the middle 80s to lower 90s. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Clark County3 NW Anson3 NE Athens21 0720CST1515CST 0 0 125.00K 0.00K FloodHeavy rains during the third week of August resulted in the Des Moines River at St. Francisville going above the moderateflood stage level of 22 feet on August 21 around 820 am CDT. It crested around 22.24 feet around 12 pm CDT August 21. Itfell below the moderate flood stage level around 415 pm CDT August 21.MISSOURI, NorthwestMOZ037Jackson02141100CST1800CST 2 0 0.00K 0.00K HeatA ridge of high pressure aloft, caused unseasonably hot and humid conditions across west central Missouri. The excessive heatand humidity was from August 2nd through August 14th. A cold front brought an end to the heat, during the evening hours ofAugust 14th. Excessive humidity, combined with afternoon high temperatures in the 95 to 104 degree range, caused heat indexreadings in the 105 to 115 degree range. M86PH, F92PHAndrew County3 SW Lone Corner 09 0330CST 0 0 1.00K 0.00K Thunderstorm Wind (61EG)A metal machine shed roof was blown off. Several trees were blown over. An outbuilding was also destroyed and grass wasflattened by the microburst.An isolated pre-dawn thunderstorm, produced microburst wind damage in Andrew County, on August 9, 2010. Note: Theestimated wind gust of 61 knots is equivalent to 70 mph.Cass County1 SW Lisle 11 1645CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A thunderstorm wind gust was estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jackson County1 NNW Lake Lotawana 11 1713CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A thunderstorm wind gust was estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.263

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, NorthwestJackson County1 NNW Lake Lotawana 11 1715CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A tree was blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jackson County1 NNE Lake Lotawana 11 1720CST 0 0 5.00K 0.00K Thunderstorm Wind (70EG)A 15 foot tall tree with a 6 to 7 inch diameter trunk was blown over. Fence panels were also blown over. An outdoor fire pitwas blown around. Damage also to porches, siding, and shingles.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Jackson County1 NNW Lake Lotawana 11 1723CST 0 0 0.10K 0.00K Thunderstorm Wind (52EG)A thunderstorm wind gust was estimated up to 60 mph. A few shingles were blown off a house.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jackson County1 NNW Lake Lotawana 11 1724CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A thunderstorm wind gust was estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jackson CountyLees Summit 11 1745CST 0 0 0.00K 0.00K Hail (0.88)Widely scattered, but intense thunderstorms, erupted across west central Missouri and far eastern Kansas on Wednesday (Aug11 2010) as extreme instability developed amidst 100 degree temperatures and a very tropical airmass over the region. A smallcluster of intense storms impacted the Kansas City suburb of Lee's Summit, producing widespread damage between 515 and530 PM CST.Eyewitness accounts, video, and a survey of the damage, confirm that thunderstorm damage across southeast sections of Lee'sSummit, was caused by a series of wet microbursts. Numerous large trees were snapped, in an area that encompassed portionsof the Windsboro, Charleston Park and Cantebury subdivisions between Highway 50, to just north of Langsford Road, east ofTodd George Rd. The fallen trees resulted in damage to fences, porches and several homes in the area. In addition, minordamage to roof shingles and home siding was also observed. Maximum wind speeds are estimated to have been between 70 and80 mph.Clay County1 S Pleasant Vly 12 1300CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)A very large tree, several feet in diameter, was reported down near the Ford Plant.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Clay CountyPleasant Vly 12 1303CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm wind gusts were estimated up to 70 mph.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Clay County1 NE Liberty 12 1304CST 0 0 0.00K 0.00K Thunderstorm Wind (70EG)Tree limbs down in Liberty, with winds estimated up to 80 mph.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Clay CountyPleasant Vly 12 1307CST 0 0 2.00K 0.00K Thunderstorm Wind (70EG)Many trees up to 6 inches in diameter blown down. Fences were also reported blown over.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.264

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, NorthwestJackson County1 SE Ripley 12 1329CST 0 0 0.00K 0.00K Thunderstorm Wind (65MG)A thunderstorm wind gust was measured at 75 mph, at the junction of Highway's 7 and 24.Note: The measured wind gust of 65 knots is equivalent to 75 mph.Jackson County1 SW Sugar Creek 12 1342CST 0 0 0.00K 0.00K Hail (1.00)One inch hail was reported near the intersection of Winner Road and Blue Ridge Boulevard.Outflow boundaries, leftover from overnight convection, caused severe thunderstorm development across west centralMissouri, during the afternoon hours of August 12, 2010.Andrew County1 E Savannah 13 1635CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A powerpole was blown over on County Road 33. Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Andrew County2 NW Cosby 13 1648CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated to 60 mph. Several large tree limbs were reported down along Highway 169.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Buchanan County1 S St Joseph 13 1700CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several large tree limbs were reported down, at the intersection of Locust and 30th Streets. Thunderstorm wind gusts wereestimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Buchanan County2 WNW Saxton 13 1722CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Numrous vendor tents were blown down, at the Kansas City Chiefs training camp, at Missouri Western State College. Debriswas strewn about the practice field, with winds estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Daviess County1 S Winston 13 1723CST 0 1 0.75K 0.00K Thunderstorm Wind (61EG)A tractor trailer was blown off of Interstate 35, near exit 61. The driver suffered minor injuries. Numerous trees were blowndown, and blocked portions of Highway 69 near Winston. Thunderstorm wind gusts were estimated to 70 mph.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.De Kalb County7 E Osborn 13 1724CST 0 0 0.00K 0.00K Thunderstorm Wind (70EG)Thunderstorm wind gusts were estimated up to 80 mph. Trees up to two feet in diameter were split and blown over.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.De Kalb County7 E Osborn 13 1726CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.265

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, NorthwestDaviess County4 SSW Civil Bend 13 1733CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was reported down across Interstate 35, near mile marker 68. Thunderstorm wind gusts were estimated up to 60mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clinton County2 E Cameron Muni Arpt 13 1735CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mp. Tree limbs up to 4 inches in diameter were reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Daviess County1 WSW Pattonsburg 13 1736CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was blocking Highway 69 between Pattonsburg and Winston. Thunderstorm wind gusts were estimated up to 60mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Daviess County3 NNE Altamont 13 1736CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Caldwell County1 N Hamilton 13 1740CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Caldwell County1 NW Kingston 13 1745CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Daviess County1 SE Gallatin 13 1745CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Daviess County1 SE Gallatin 13 1746CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Caldwell County1 ESE Breckenridge 13 1753CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm wind gusts were estimated up to 65 mph.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Caldwell County1 SE Polo 13 1755CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)A thunderstorm wind gust was estimated up to 65 mph.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Platte County1 N Milton 13 1801CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down near Interstate 29 and 72nd Street. Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.266

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, NorthwestClinton County1 W Plattsburg 13 1807CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clinton County1 SW Plattsburg 13 1810CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clay County1 E Linden 13 1814CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)A tree was reported down on a mobile home, near Highway 169 and NW Englewood Road. Thunderstorm wind gusts wereestimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clay County1 SE Gashland 13 1814CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Trees were reported down on powerlines, near Highway 169 and North 68th Street. Thunderstorm wind gusts were estimatedup to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Livingston CountyDawn 13 1815CST 0 0 0.10K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph, with roof shingles blown off a home.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clay County2 SW Holt 13 1821CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A tree was reported down near 184th Street and Lancaster Road. Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Livingston County1 S Chillicothe 13 1830CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Powerlines were reported down across the town. Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clay County1 S Pleasant Vly 13 1833CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Powerlines were reported down near East Longfellow and North Bryant Roads. Thunderstorm wind gusts were estimated up to60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Linn County1 SSE Linneus 13 1845CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A tree was blown over with thunderstorm wind gusts estimated to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pettis County4 SSE Lamonte 13 1950CST 0 3 0.50K 0.00K Thunderstorm Wind (52EG)Three tents were blown over with three minor injuries reported, near the Grandstand at the Missorui State Fairgrounds.Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.267

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, NorthwestRandolph County1 ENE Clark 13 2013CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was reported to be blocking Highway P. Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jackson County1 E Grandview 13 2140CST 0 0 0.40K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mmph, with road signs blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jackson County2 SW South Lee 13 2152CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Large tree limbs were reported down, with thunderstorm wind gusts estimated to 60 mph.An upper level disturbance, combined with a cold front, caused severe thunderstorms to develop a bow echo across much ofnorthwest Missouri. The damaging winds were observed in the late afternoon and evening hours of August 13, 2010. Note:The estimated wind gust of 52 knots is equivalent to 60 mph.Platte CountyIatan 20 1220CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Platte County1 S Platte City 20 1245CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A tree was blocking Highway 45. Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clay County1 SSE Smithville 20 1250CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm wind gusts were estimated up to 65 mph.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Clinton County4 WSW Converse 20 1310CST 0 0 0.75K 0.00K Thunderstorm Wind (70EG)Thunderstorm wind gusts were estimated up to 80 mph. There were reports of tree damage and minor roof damage.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Ray County1 NW Lawson 20 1324CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm wind gusts were estimated up to 70 mph.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Clay County1 E Holt 20 1325CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An eighteen inch diameter tree was blown down. Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clay CountyExcelsior Spgs 20 1325CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.268

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, NorthwestClay County1 E Holt 20 1326CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph. Trees were reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Daviess County1 SE Gallatin 20 1327CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Severe thunderstorms were observed across the area, during the afternoon hours of August 20, 2010. Increasing moisture, alongwith returning unseasonably hot air, led to severe thunderstorm development across the area. The thunderstorms producedseveral reports of damaging winds. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Atchison County2 WNW Westboro 31 1655CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Atchison County1 N Tarkio 31 1739CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Atchison County3 ENE Tarkio Gould Muni Ar 31 1742CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Atchison County1 N Tarkio 31 1757CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Numerous trees and powerlines were reported down. Two houses were damaged by falling trees. Thunderstorm wind gustswere estimated up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cass County2 SW Harrisonville 31 1812CST 0 0 0.50K 0.00K Thunderstorm Wind (52EG)A tree one foot in diameter was reported down and a power pole was snapped. Thunderstorm wind gusts were estimated up to60 mph.Atchison County1 N Tarkio2 NW YorkNote: The estimated wind gust of 52 knots is equivalent to 60 mph.31 1820CST2359CST 0 0 0.00K 0.00K Flash FloodExtensive street flooding was observed across the town of Tarkio.Atchison County1 N Tarkio 31 1820CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts were estimated up to 60 mph.A cold front, combined with an upper level disturbance, moved across the area, during the afternoon and evening hours, ofAugust 31, 2010. Severe thunderstorms rolled across the region, with several reports of damaging winds. Heavy rains causedone report of flash flooding. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.269

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, SoutheastCape Girardeau County1 SE Gulf Jct 01100000CST0900CST 0 0 0.00K 2.00K FloodMinor flooding of the Mississippi River persisted from July into early August. Fields and boat ramps along the river werepartially submerged.Persistent wet weather across the Upper Mississippi Valley sent several small crests down the river, keeping the river aboveflood stage at Cape Girardeau.MOZ100-107>112-114Butler - Carter - Mississippi - New Madrid - Ripley - Scott - Stoddard - Wayne01310000CST2359CST 0 0 0.00K DroughtModerate drought conditions persisted over much of southeast Missouri. After a very dry June, some areas received beneficialrain in July and August. Rainfall for the months of July and August was variable, consisting of isolated to widely scatteredshowers and thunderstorms. Many locations were one to over three inches below normal for the month of August. Hotconditions increased evaporation rates and crop stress. Unirrigated corn yields were expected to be a total failure in someplaces. Livestock producers in Ripley and Carter Counties were feeding hay due to pastures that were burned up by not havingsignificant rainfall for six weeks. Livestock water was also becoming a concern for some producers. An upper level ridge ofhigh pressure remained firmly entrenched over the southern states during most of the month.MOZ076-086-100-107>112-114Bollinger - Butler - Cape Girardeau - Carter - Mississippi - New Madrid - Perry - Ripley - Scott - Stoddard- Wayne03041000CST2000CST 0 0 0.00K 0.00K Excessive HeatExcessively high heat indices were recorded in the late morning and afternoon hours of both the 3rd and 4th. On the 3rd, theheat index peaked at 122 degrees at the Poplar Bluff airport and 119 degrees at the Cape Girardeau airport. Heat indices onlyfell to around 90 degrees at sunrise. On the 4th, heat indices peaked at 119 at Poplar Bluff and 115 at Cape Girardeau. Actualair temperatures reached 100 degrees at Poplar Bluff and 101 at Cape Girardeau. A large, strong high in the upper levels of theatmosphere overspread the southern half of the nation.09151000CST2000CST 0 0 0.00K 0.00K Excessive HeatMOZ086-100-107>112-114Bollinger - Butler - Cape Girardeau - Carter - Mississippi - New Madrid - Ripley - Scott - Stoddard -Wayne09151000CST2000CST 0 0 0.00K 0.00K Excessive HeatA strong and very persistent high in the upper levels of the atmosphere was responsible for seven consecutive days of heatindices at or above 110 degrees. The high was centered over the Lower Ohio Valley for the first few days of the heat wave,then it shifted slightly southward and weakened. The summer as a whole was among the hottest on record. The heat indexmainly peaked between 110 and 115 degrees at the Cape Girardeau and Poplar Bluff airports each afternoon, though PoplarBluff edged above 115 degrees on a couple afternoons. Heat indices during the early morning hours were mostly in the mid toupper 80's. Information concerning heat-related illnesses was not available from hospitals.Perry CountyPerryville 12 1210CST 0 0 25.00K 0.00K Thunderstorm Wind (52EG)Tree limbs and power lines were blown down. A tree limb caused power lines to fall across city-owned vehicles at a city firestation. A downed tree completely blocked a city street. Several trees were damaged on the courthouse lawn. A tree fell acrossa wire and broke off a pole near the courthouse.An isolated microburst was produced by a thunderstorm that formed in a hot and very unstable air mass. The atmosphere wascharacterized by a weak flow regime resulting from persistent ridging in the mid and upper levels. Note: The estimated windgust of 52 knots is equivalent to 60 mph.Scott CountySikeston 14 1535CST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)High winds struck the stage of an outdoor music concert just before it was set to begin. The stage roof, which was made ofmetal trusses and a tarp-type material, was blown down. Support beams damaged the stage. Nobody was injured.270

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, SoutheastCape Girardeau County1 ESE Gulf Jct1 SE Cape GirardeauA microburst occurred in association with a cluster of thunderstorms that formed in a very hot and unstable air mass. Thestorms were aided by very weak surface troughing that extended from southeast Missouri across the Lower Ohio Valley. Note:The estimated wind gust of 56 knots is equivalent to 64 mph.17250900CST1400CST 0 0 0.00K 1.00K FloodMISSOURI, SouthwestMinor flooding occurred along the Mississippi River. Fields and boat ramps along the river were partially submerged.A couple more minor flood crests associated with persistent heavy rain in the upper portions of the river basin moved down theMississippi River.Mcdonald County1 S Pineville 01 1733CST 0 0 0.00K 0.00K Hail (0.75)Mcdonald CountyHavenhurst 01 1738CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was reported down across Highway K blocking traffic.Isolated early evening air mass thunderstorms produced small hail and wind damage in portions of southwest Missouri. Note:The estimated wind gust of 52 knots is equivalent to 60 mph.Mcdonald County1 SW South West City 08 1649CST2200CST 0 0 0.00K 0.00K Flash FloodExcessive rainfall caused significant street flooding.Isolated air mass thunderstorms produced localized flooding during the early evening.Laclede County4 SSE Bennett Spgs 11 1854CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Downburst winds peeled a metal roof off of an outbuilding that was open on one side.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Laclede County1 WNW Jacksonville 12 1550CST 0 0 0.00K 0.00K Hail (1.00)Isolated air mass thunderstorms produced strong winds and hail during the early evening.Ozark County1 S Willholt 12 1615CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Several large tree limbs were downed causing power outages.Isolated air mass thunderstorms produced strong winds during the afternoon. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Greene CountyAsh Grove 13 2050CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)A few trees were downed due to high winds. One tree fell on a car. Some shingles and siding damage was also reported to ahome.Isolated air mass thunderstorms produced strong winds during the early evening. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Dade County1 ENE Lockwood 15 0040CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A deputy estimated wind speeds up to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.271

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MISSOURI, SouthwestDade County1 N South Greenfield 15 0045CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A few trees were reported down near the intersection of Highways 160 and 39.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Dade County1 E Greenfield 15 0045CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several trees...some up to 18 inches in diameter...were reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Greene CountyStrafford 15 0155CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several large tree limbs were downed and a section of wooden fence was blown over.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Greene County2 WNW Fair Grove 15 0158CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree down was reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Greene County1 N Strafford Grn Co Arp 15 0200CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A 14 inch diameter tree fell on a power line and blocked a portion of Farm Road 84.A thunderstorm complex which developed over Kansas moved over southeast Kansas and the Missouri Ozarks after midnight,producing several reports of winds in excess of 60 MPH and wind damage reports. Note: The estimated wind gust of 52 knotsis equivalent to 60 mph.Wright County1 E Mountain Grove 20 1125CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Several power lines were reported down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Wright County1 NE Mountain Grove 20 1127CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)A large tree limb was downed and landed on a parked car.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County3 N St Robert 20 1246CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down and landed on a parked police patrol car.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pulaski County4 SE Swedeborg 20 1250CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was reported down.Two rounds of storms moved over the eastern Ozarks early in the day and then again late in the afternoon. The stormsdeveloped mainly on boundaries left over from prior convection. With plenty of low level moisture and instability, theboundary interactions helped to produce strong to severe diurnal thunderstorms. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.272

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, CentralGallatin County11 NNE Bozeman 01 1635MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A thunderstorm gust to 60 mph was reported at Bozeman 11NNE (the Bridger Bowl Ski Resort).Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Hill County4 W Havre 01 1635MST 0 0 0.00K 0.00K Thunderstorm Wind (58MG)A thunderstorm produced a wind gust to 67 mph at Havre 4W (the Havre ASOS site).Note: The measured wind gust of 58 knots is equivalent to 67 mph.Judith Basin County6 W Stanford 01 1815MST 0 0 0.00K 0.00K Hail (1.00)A thunderstorm dropped 1 inch diameter hail at Stanford 6W.An unstable airmass contributed to thunderstorm development across a wide area of Northcentral Montana. Wind gusts to 60mph and hail the size of golf balls was reported.Chouteau County5 NNE Big Sandy 02 2000MST 0 0 0.00K 0.00K Hail (1.00)A thunderstorm dropped 1 inch diameter hail at Big Sandy 5NNE.Thunderstorms developed from an unstable airmass during the late evening hours. Hail the size of quarters was reported.Lewis And Clark County6 E Marysville 05 1827MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)A thunderstorm produced a wind gust to 60 mph at Marysville 6E.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Broadwater County1 NW Winston 05 1843MST 0 0 0.00K 0.00K Thunderstorm Wind (62EG)A thunderstorm produced a wind gust to 72 mph at Winston 1NW.An unstable airmass contributed to the development of thunderstorms over portions of southwest Montana. Wind gusts inexcess of 60 mph were reported. Note: The estimated wind gust of 62 knots is equivalent to 71 mph.Beaverhead County5 NE Dillon 06 1706MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)A thunderstorm produced a wind gust to 60 mph at Dillon 5NE (the Dillon ASOS site).Note: The measured wind gust of 52 knots is equivalent to 60 mph.Beaverhead CountyMonida 06 1730MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)A thunderstorm produced a wind gust to 60 mph at Monida Pass.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Cascade County5 WSW Great Falls 06 1812MST 0 0 0.00K 0.00K Thunderstorm Wind (60MG)A thunderstorm produced a wind gust to 69 mph at Great Falls 5WSW (the Great Falls ASOS site).Note: The measured wind gust of 60 knots is equivalent to 69 mph.273

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, CentralCascade County(GFA)Malmstrom Afb 06 1818MST 0 0 0.00K 0.00K Thunderstorm Wind (57MG)A thunderstorm produced a wind gust to 66 mph at Malmstrom Air Force Base.An unstable airmass contributed to the development of thunderstorms over Cascade and Beaverhead Counties. Wind gusts inexcess of 60 mph were reported. Note: The measured wind gust of 57 knots is equivalent to 66 mph.Judith Basin County2 ESE Geyser 10 2011MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)A thunderstorm produced a wind gust to 65 mph at Geyser 2ESE.Late evening thunderstorms developed over Judith Basin County. Wind gusts in excess of 60 mph were reported. Note: Themeasured wind gust of 56 knots is equivalent to 64 mph.Teton County28 NW Choteau 11 1528MST1730MST 0 0 0.00K 0.00K Flash FloodNational Weather Service 88D radar returns indicated heavy rainfall from a slow moving thunderstorm thus prompting a flashflood warning. No reports of damage were received.Slow moving thunderstorms produced heavy rains and flash flooding over Teton County. No damages were reported.Fergus County1 ESE Denton 11 1555MST 0 0 0.00K 0.00K Hail (1.25)A thunderstorm dropped 1.25 inch diameter hail at Denton 1ESE.Fergus County4 SW Christina 11 1700MST 0 0 0.00K 0.00K Hail (1.00)MONTANA, EastA thunderstorm dropped 1 inch diameter hail at Christina 4SW.A moist and unstable airmass contributed to the development of late afternoon thunderstorms over Fergus County. Hail the sizeof half dollars was reported.Phillips County20 N Saco 01 1305MST 0 0 0.00K 0.00K Hail (1.00)Hail fell with heavy rain and wind gusts to 50 mph.Roosevelt CountyFroid 01 1310MST1320MST 0 0 5.00K 0.00K Hail (3.00)Public report in a newspaper clipping of 2.5 to 3 inch hail occurred at 1310 MST. At 1312 MST 2 miles NNE of Froid, nickelsize hail fell. Spotter reported 1.5 inch hail 2 miles NNE of Froid at 1315 MST. At 1320 MST Froid 1.00 to 1.75 inch hail fellmixed with 60 mph winds, denting a camper.Roosevelt CountyFroid 01 1320MST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Winds combined with hail and dented a camper.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Roosevelt County9 WSW Brockton 01 1330MST 0 0 0.00K 0.00K Hail (1.00)One inch hail mixed with heavy rain on Highway 2.274

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, EastRoosevelt County10 E Froid 01 1350MST 0 0 0.00K 0.00K Hail (1.00)One inch hail fell along with heavy rain.Roosevelt CountyVolt 01 1604MST1615MST 0 0 0.00K Thunderstorm Wind (61EG)At Volt at 1604 MST, water was being pushed into the basement with the wind. At 1 mile north of Volt, wind shook the houseand an 80 year old tree with a diameter of 16 inches snapped in half. Several large branches broke off in a tree grove. Anotherbatch of trees 20 inches in diameter were all snapped at the base. All debris was blown southeast of the originating point.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Roosevelt County18 NW Poplar 01 1635MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Spotter observed the wind gust along with very heavy rain.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Garfield County1 S Mosby 01 1650MST 0 0 0.00K 0.00K Hail (0.75)Richland County25 WNW Sioux Pass Dot 01 1730MST 0 0 0.00K 0.00K Hail (0.75)Wind also accompanied the hail.Richland County25 WNW Sioux Pass Dot 01 1730MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Hail also accompanied the wind.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Richland County20 NNW Enid 01 1740MST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Trees were bending and a rain barrel was rolling through the field.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Valley County14 SW Hinsdale 01 1915MST 0 0 0.00K 0.00K Hail (0.75)Wind also accompanied the hail.Valley County14 SW Hinsdale 01 1915MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Hail also fell with the wind.This severe weather occurred mostly north of the Missouri river. Note: The estimated wind gust of 52 knots is equivalent to 60mph.Phillips County12 NW Saco 06 1741MST 0 0 0.00K 0.00K Hail (0.75)Rainfall of 0.25 also fell.Phillips County3 NE Saco 06 1748MST 0 0 0.00K 0.00K Hail (0.88)Hail was covering the ground.Phillips County4 N Saco 06 1753MST 0 0 0.00K 0.00K Hail (0.88)275

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, EastPhillips County6 ENE Saco 06 1817MST 0 0 0.00K 0.00K Hail (0.88)Rainfall of 0.50 also fell.Valley CountyHinsdale 06 1830MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Valley County3 E Hinsdale14 NW GlasgowThe wind broke 5 inch branches out of trees.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.06 1840MST1845MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)At 1840 MST 3 miles east of Hinsdale, a haystack was blown up from the wind gust. At about the same time, a trained spotterestimated a 70 mph wind gust and half inch hail.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Valley County2 W Glasgow 06 1918MST1923MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)NWS Employee estimated wind gust at 2 miles west of Glasgow. Public estimated wind gust 7 miles north of Glasgow.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Valley County4 N Glasgow 06 1923MST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Valley CountyGlasgow Intl Airport (kggw) 06 1937MST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Valley County15 E Glasgow 06 2000MST 0 0 0.00K 0.75M Thunderstorm Wind (52EG)NWS Survey team witnessed over 20,000 acres of crops 70 to 100% destroyed from the wind and nickel size hail. This waspart of the hail/wind swath that extended from 12 miles north of Nashua to the southwest portion of Roosevelt County.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Valley County12 N Nashua 06 2020MST 0 0 0.00K 750.00K Thunderstorm Wind (104EG)A macroburst occurred where damage consisted of one doublewide manufactured home with the roof blown off, one emptystorage building blown apart, and about 3 miles of downed power lines (approximately 44 poles all together) starting near milemarker 10 north of Nashua on the Nashua Road (State Highway 438). The power poles were snapped cleanly, mostly at groundlevel. As the poles were around 10 years old and relatively strong looking, and there were 3 miles of snapped poles, the NWSofficials estimated the winds to be around 120 mph. The house and storage building had less wind, since nearby poles were notsnapped at those locations. This also was the origination point to where a combined swath of hail and wind damaged 70 to 100percent of the crops east southeast to the Roosevelt County border. This storm continued into extreme southwest RooseveltCounty.According to the USDA Hazard Risk Assessment indemnity figures, approximately $750,000 worth of crop damage occurredwith this storm (as of October 12, 2010).Note: The estimated wind gust of 104 knots is equivalent to 120 mph.276

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, EastPower poles snapped from the macroburst, estimated with winds speeds of up 120 mph. Nearly 3 miles ofpower poles were downed. NWS photo.Roosevelt CountyWolf Pt 06 2050MST 0 0 0.00K 0.00K Hail (1.00)This storm was part of a hail and wind swath that mainly affected southeast Valley County, moved east-southeast and endednear this point.Roosevelt CountyMcdonalds Dot 06 2052MST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Roosevelt CountyWolf Pt 06 2100MST 0 0 0.00K 0.00K Hail (0.88)Mccone County18 NW Vida 06 2120MST2130MST 0 0 0.00K 0.00K Heavy RainThree inches of water was observed over Highway 528 at mile marker 9.Mccone County15 NE Vida 06 2125MST 0 0 0.00K 0.00K Thunderstorm Wind (70EG)Pea size hail also fell.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Mccone County7 N Circle 06 2135MST 0 0 0.00K 0.00K Hail (1.25)An upper level ridge moved east of Montana during the day bringing southwest flow aloft across eastern Montana. Dewpointsstarted off low, however a boundary of higher moisture at the surface moved across northeast Montana which became the focusof the intensified convection. The storms began in northern Blaine County then into Phillips County. Better instability allowedthe strong storms to become severe as they moved east.Petroleum County5 S Flatwillow 09 1630MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Around 70 mph wind blew over a large wooden shed and pushed it 500 feet away from it's foundation. The shed was 48 feet x18 feet. It was 50 years old but still in good shape and was of solid construction.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.277

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, EastDawson County7 SW Richey 09 2200MST 0 0 0.00K 0.00K Hail (1.50)Mixed in mostly with quarter size hail.Hail that fell in the Richey area. Credit: Bob Walker.Mccone CountyBrockway 09 2215MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)This severe weather episode affected areas south of the Missouri River. Note: The measured wind gust of 56 knots isequivalent to 64 mph.Valley County10 N Opheim 11 1626MST 0 0 0.00K 0.00K Hail (0.75)Valley County12 NE Opheim 11 1650MST 0 0 0.00K 0.00K Hail (1.75)Daniels County19 NE Peerless 11 1735MST 0 0 0.00K 0.00K Hail (1.75)Daniels County16 NW Scobey 11 1750MST 0 0 0.00K 0.00K Hail (1.75)Valley County8 ESE Glentana 11 1813MST 0 0 0.00K 0.00K Hail (1.00)Daniels County9 NE Scobey 11 1830MST 0 0 0.00K 0.00K Hail (1.75)Daniels County3 NE Peerless 11 1845MST1850MST 0 0 0.00K 0.00K Hail (2.75)At 1845 MST 3 NE of Peerless, 2.75 inch hail reported by the public. At 1850 MST 3 miles E of Peerless 1 inch hail wasreported.Richland County13 NNW Sidney 11 1845MST 0 0 0.00K 0.00K Hail (0.75)278

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, EastDaniels County4 E Whitetail 11 1851MST 0 0 0.00K 0.00K Hail (1.00)Phillips CountyMalta South Dot 11 1854MST 0 0 0.00K 0.00K Thunderstorm Wind (63MG)Malta South DOT sensor recorded the wind gust.Note: The measured wind gust of 63 knots is equivalent to 72 mph.Sheridan County6 WNW Outlook 11 1900MST 0 0 0.00K 0.00K Hail (0.88)Brief period of hail occurred.Sheridan County3 NNW Redstone 11 1901MST 0 0 0.00K 0.00K Funnel CloudFunnel cloud spotted northwest of Redstone with another one located between Flaxville and Redstone.Daniels County4 NW Scobey 11 1933MST 0 0 0.00K 0.00K Hail (1.00)Phillips County6 E Malta 11 1958MST 0 0 0.00K 0.00K Hail (1.00)Lightning from the storm also started fires in the area.Valley County33 NW Glasgow 11 2033MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gust is estimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Phillips County4 N Saco 11 2038MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gust was estimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Valley County8 NW Hinsdale 11 2040MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gust was estimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sheridan CountyWestby 11 2042MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gust estimated. Small hail was also reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Valley County8 WSW Lustre 11 2200MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gust was estimated.Severe weather occurred north of the Missouri River with this episode. Note: The estimated wind gust of 52 knots is equivalentto 60 mph.Dawson County7 W Hoyt 12 1625MST 0 0 0.00K 0.00K Hail (0.75)Also estimated 40 mph wind.Wibaux County5 WNW Wibaux 12 1732MST 0 0 0.00K 0.00K Hail (1.00)Severe weather clipped the far eastern portion of the area as the storms moved east.279

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, EastRichland County18 NW Sidney 19 1435MST1505MST 0 0 0.00K 0.00K Heavy RainRainfall of 1.7 inches fell along with hail.Richland County18 N Sidney 19 1505MST 0 0 0.00K 0.00K Hail (1.00)Public reported quarter size hail.Richland County19 NW Sidney 19 1505MST 0 0 0.00K 0.00K Hail (1.75)Rancher reported golfball size hail. Also had one stone that was 2.25 inches in diameter but was composed of smaller stonesfused together.Dawson CountyBloomfield 19 1615MST 0 0 0.00K 0.00K Hail (0.75)Slushy dime size hail pieces and smaller. 50 mph wind also accompanied the hail.A thunderstorm briefly became severe in Richland County, producing large hail and heavy rain. This storm formed near a dryline and ahead of a cold front that was moving in from Canada.Valley CountyKing Coulee Raws 21 1250MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Valley CountyGlasgow Intl Airport (kggw) 21 1320MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Garfield CountyJordan Airport (kjdn) 21 1609MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)The wind also did significant damage to a horse barn at the local fairgrounds. Power poles 30 miles east (at Flowing Wells)were downed which started some fires.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Valley County5 SW Ft Peck 21 1710MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Winds were estimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Roosevelt County16 SW Bredette 21 1800MST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Spotter estimated the wind gust.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Sheridan County12 WSW Reserve 21 1900MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Pea size hail and brief heavy rain also fell with the thunderstorm winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Prairie CountyBig Sheep Mountain Raws 21 2344MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Also a spotter 30 miles northwest of Terry estimated a 60 mph wind gust that took down a three foot Poplar tree.This episode involved thunderstorms that brought high winds to the area ahead of a cold front. Note: The measured wind gustof 52 knots is equivalent to 60 mph.280

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, SouthPowder River County1 W Sonnette 03 0645MST 0 0 Hail (1.25)Park CountyWilsall 03 1600MST 0 0 0.00K 0.00K Hail (0.88)A few thunderstorms produced sub-severe hail and severe hail across portions of the County Warning Area.Stillwater CountyRapelje 06 1542MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Yellowstone County7 W Rimrock 06 1606MST 0 0 Thunderstorm Wind (52EG)Spotter estimated wind gust to be 60 mph as tree branches were breaking.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Yellowstone County13 ENE Comanche 06 1635MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)A thunderstorm producing severe wind gusts moved through Stillwater and Yellowstone Counties during the late afternoonhours on the 6th. Note: The measured wind gust of 54 knots is equivalent to 62 mph.Big Horn County7 N Decker 07 1355MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An estimated thunderstorm wind gust of 60 mph was reported 1 mile NNE of the Tongue River Reservoir.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Park County(LVM)Livingston Arpt 08 1625MST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)A couple of isolated thunderstorms producing severe wind gusts moved across Park and Big Horn Counties. Note: Themeasured wind gust of 55 knots is equivalent to 63 mph.Carter CountyAlzada 12 1753MST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)An isolated thunderstorm over Carter County produced a severe wind gust. Note: The measured wind gust of 50 knots isequivalent to 58 mph.Custer County1 NW Miles City 21 1748MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)A thunderstorm producing a severe wind gust moved through Miles City. Note: The measured wind gust of 51 knots isequivalent to 59 mph.Yellowstone County1 SW (BIL)Logan Arpt Bill 29 1454MST 0 0 Hail (1.75)The public reported broken car windows on 27th and 6th downtown.Yellowstone CountyBillings Hgts 29 1455MST 0 0 Hail (1.25)Yellowstone County3 NNE Billings 29 1455MST 0 0 Hail (1.00)Yellowstone County1 SW (BIL)Logan Arpt Bill 29 1455MST 0 0 Hail (1.75)Possible car damage in the Billings Heights was reported.281

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, SouthYellowstone County1 SW (BIL)Logan Arpt Bill 29 1458MST 0 0 Hail (1.50)Yellowstone County1 NNE Billings 29 1458MST 0 0 Hail (1.00)Yellowstone County1 SW (BIL)Logan Arpt Bill 29 1459MST 0 0 Hail (1.00)A severe thunderstorm producing large, damaging hail moved across Yellowstone County during the late afternoon hours of the29th. In particular, the hardest hit area was the city of Billings.Fallon County1 SE Baker 30 1653MST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)MONTANA, WestA thunderstorm producing a severe wind gust moved through Baker during the late afternoon hours of the 30th. Note: Themeasured wind gust of 53 knots is equivalent to 61 mph.Flathead County1 E Blacktail 02 1500MST1515MST 0 0 0.00K 0.00K Hail (1.00)A car traveling over Logan Pass sustained dents from the hail.Sanders County1 SW Camas 02 1830MST1930MST 0 0 15.00K 0.00K Flash FloodA slow moving thunderstorm dropped rainfall amounts of 1.59 inches up to an estimated 3.25 inches in a one to two hourperiod. Twenty five homes were flooded from runoff. One home owner had half their yard washed away with a shed alsoflooded.Sanders County1 S Camas 02 1830MST1845MST 0 0 0.00K 0.00K Hail (0.75)The NWS storm survey team ran across a pile of hail 15 hours after the hail event occured which was still 0.75 inches indiameter. Hail was likely quite a bit larger when it initially fell.Strong thunderstorms developed across northwest Montana ahead of an approaching upper level trough. The main threat withthese storms was heavy rain and some hail. In one case, the thunderstorm sat stationary for an hour and dumped heavy rainover Hot Springs. This led to flash flooding in the area.Deer Lodge CountyAnaconda 05 1645MST1715MST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)The Deer Lodge County emergency manager reported tin roof and shingle damage in Anaconda. Storm drains were alsohaving difficulty keeping up with the heavy rainfall amounts.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ravalli County17 E Hamilton Rvlli Co Ar 05 1707MST1745MST 0 0 0.00K 0.00K Hail (1.50)A NWS storm survey of Skalkaho Pass 15 hours after the storm had passed, revealed hail stones of 1.33 inches to 1.5 inches indiameter, with hail accumulations up to four inches deep.282

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, WestDeer Lodge CountyWest Vly 05 1730MST1745MST 0 0 0.00K 0.00K Heavy RainA trained spotter reported a one hour rainfall total of 0.91 inches of rain.Deer Lodge CountyAnaconda 05 1735MST1755MST 0 0 0.00K 0.00K Heavy RainA trained spotter reported that 0.78 inches of precipitation fell in 40 to 50 minutes.Granite County(3DU)Drummond 05 1830MST1845MST 0 0 1.00K 0.00K Flash FloodA flash flood came out of Edwards Gulch and brought debris, including mud and rocks, as well as water, into buildings on thewest side of town. There was also some basement flooding.Granite County(3DU)Drummond 05 1830MST1845MST 0 0 0.00K 0.00K Hail (0.88)Nickel sized hail was accompanied by heavy rain.Severe thunderstorms formed ahead of an approaching upper level trough oriented along the Pacific coast. Thunderstormsmainly produced hail, up to 1.5 inches in diameter, but some wind damage was also reported across southwest Montana.Heavy rain was also reported with these thunderstorms. In some cases nearly an inch of rain fell in a short amount of time. Aflash flood occurred in Drummond due to the heavy rain.Ravalli County6 E Darby 06 1356MST1411MST 0 0 0.00K 0.00K Hail (1.00)A spotter at the Deer Mountain lookout reported dime to quarter size hail and heavy rain.Flathead County1 SSW Whitefish 06 1528MST1543MST 0 0 0.00K 0.00K Hail (1.25)Ravalli CountyDarby 06 1645MST1700MST 0 0 0.00K 0.00K Hail (1.25)Broadcast media forwarded on a picture they received from a viewer of hail measuring 1.25 inches in diameter.Ravalli County8 W Charlos Hgts 06 1810MST1825MST 0 0 0.00K 0.00K Hail (1.00)An unstable and moist atmosphere led to another round of severe thunderstorms across portions of western Montana. The mainthreat with these storms was hail up to 1.25 inches and heavy rain.Missoula County7 NNE Stark 18 1430MST1445MST 0 0 0.00K 0.00K Heavy RainBrief heavy rain was mixed with hail at Fish Creek and the Clark Fork River. Precipitation measured in at 0.40 inches in lessthan 30 minutes.283

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010MONTANA, WestMissoula County5 WSW Lolo 18 1645MST1700MST 0 0 0.00K 0.00K Heavy RainA spotter reported 0.30 inches of rain in 15 minutes.Missoula County2 NNE Carlton 18 1715MST1730MST 0 0 0.00K 0.00K Hail (0.75)Sanders CountyDixon 18 1830MST1845MST 0 0 0.00K 0.00K Heavy RainA trained spotter reported 0.50 inches of rain in less than 30 minutes.A low pressure circulation moving through central Idaho brought a moist and unstable airmass to western Montana.Thunderstorms capable of producing hail and heavy rain in a short period of time were reported.Silver Bow CountyButte 26 1834MST1900MST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Large trees fell across roadways and power lines were knocked down in portions of Butte. A few small grass fires werereported from the downed power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ravalli County1 NW Stevensville 26 1925MST1940MST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)NEBRASKA, CentralAn amateur radio operator reported a wind gust to 58 mph.Severe thunderstorms across western Montana produced wind damage in portions of southwest Montana. Trees were toppledand power lines knocked down with a few properties reporting damage. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.Cherry CountyValentine 02 1749CST 0 0 0.00K 0.00K Thunderstorm Wind (70MG)Note: The measured wind gust of 70 knots is equivalent to 81 mph.Cherry CountyValentine 02 1815CST 0 0 5.00K 0.00K Thunderstorm Wind (70MG)A fireman in Valentine reported roofs blown off houses, power poles down, and localized street flooding.A cold front combined with an upper level disturbance brought isolated severe thunderstorms to portions of northern Nebraska.Note: The measured wind gust of 70 knots is equivalent to 81 mph.Logan County4 SSE Gandy 03 1705CST 0 0 0.00K 0.00K Hail (1.00)Lincoln County7 SSE Brady 03 1921CST 0 0 0.00K 0.00K Hail (1.00)Hayes County6 SE Hayes Center 03 1940CST 0 0 0.00K 0.00K Hail (1.00)Frontier County4 W Eustis 03 2007CST 0 0 0.00K 0.00K Funnel Cloud284

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, CentralFrontier County4 W Eustis 03 2007CST 0 0 0.00K 0.00K Hail (2.75)Frontier County1 S Eustis 03 2022CST 0 0 0.00K 0.00K Hail (1.75)A moist upslope flow north of a stationary front in Kansas, helped to create a favorable enviroment for severe thunderstormsacross southwest Nebraska.Thomas County1 E Thedford 05 1203CST 0 0 0.00K 0.00K Hail (0.75)Thomas County1 E Thedford 05 1206CST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)Note: The measured wind gust of 55 knots is equivalent to 63 mph.Thomas County4 SSW Halsey 05 1220CST 0 0 0.00K 0.00K Funnel CloudA trained spotter reported a funnel cloud 6 miles southwest of Halsey.Thomas County4 E Thedford Arpt 05 1220CST 0 0 0.00K 0.00K Hail (1.75)Hail covered the ground along highway 2 six miles east of Thedford.Blaine County6 WSW Dunning 05 1255CST 0 0 0.00K 0.00K Hail (1.00)Logan County7 NW Stapleton 05 1315CST 0 0 0.00K 0.00K Funnel CloudA trained spotter reported a brief funnel cloud 7 miles northwest of Stapleton.Logan County10 N Stapleton 05 1325CST 0 0 0.00K 0.00K Hail (0.88)Lincoln County13 NE Maxwell 05 1422CST 0 0 0.00K 0.00K Hail (0.88)Custer County1 S Mason City 05 1455CST1550CST 0 0 0.00K 0.00K Heavy RainIn less than an hour the Cooperative observer measured 3.60 inches of rainfall in Mason City.Custer County1 N Ansley 05 1520CST 0 0 0.00K 0.00K Heavy RainHeavy rainfall in Mason City was measured to 3.60 inches.Frontier County4 W Moorefield 05 1600CST 0 0 0.00K 0.00K Hail (1.00)Frontier County3 E Curtis 05 1600CST 0 0 41.00K 0.00K Thunderstorm Wind (60EG)Thunderstorm winds overturned a center pivot and downed trees.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.285

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, CentralFrontier County5 SW Moorefield 05 1705CST 0 0 0.00K 0.00K Heavy RainA public report of 3.10 inches was measured at 4 miles south of Moorefield.A warm front lifting northeast across central Nebraska was the focus for severe thunderstorm development. Storms initiatedalong the boundary during peak heating as an upper level disturbance moved northeast. Storms produced large hail, damagingwinds and a few funnel clouds were reported. The largest hail was 1.75 inches. Deep moisture was available where over 3inches of rainfall was produced in portions of Frontier and Custer counties.Holt County5 NNE Stuart 08 1333CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A report from the public estimated up to 60 mph wind gusts along with heavy rainfall and half inch diameter hail.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Holt County1 W Stuart 08 1341CST 0 0 0.00K 0.00K Hail (1.75)Holt County5 NE Stuart 08 1347CST 0 0 40.00K 0.00K Thunderstorm Wind (52EG)The public reported an estimated wind gusts at 60 mph or higher that caused a 30 foot flexhead to be pushed over and a largedumpster to be moved over 100 feet. Hail to quarter size was also reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Holt County4 NE Stuart 08 1350CST 0 0 5.00K 0.00K Hail (2.00)Law enforcement reported hail about the size of a turkey egg broke out picture windows of a home.Holt County4 NE Stuart 08 1350CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Law enforcement reported power outages from wind damage in Stuart. Two large spruce trees were blown down 3.5 milesnortheast of Stuart.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Holt County4 NE Stuart 08 1355CST 0 0 60.00K 50.00K Thunderstorm Wind (61EG)Spotters reported power poles and lines down along with grain bins blown over. Fields were stripped by damaging winds andhail.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Holt County7 N Atkinson 08 1405CST 0 0 120.00K 0.00K Thunderstorm Wind (56EG)Law enforcement reported six grain bins blown over 7 miles north of Atkinson.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Holt County3 SW Atkinson 08 1406CST 0 0 0.00K 0.00K Hail (1.50)Holt County1 W Atkinson 08 1408CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Spotters estimated thunderstorm wind gusts to 61 knots.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.286

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, CentralHolt County1 W Atkinson 08 1409CST 0 0 0.00K 0.00K Hail (1.75)Holt County10 N (ONL)O Neill Arpt 08 1410CST 0 0 0.00K 0.00K Funnel CloudHolt County11 NNE Emmet 08 1415CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Trained spotter estimated thunderstorm wind gusts to 61 knots.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Holt County7 NE Atkinson 08 1423CST 0 0 0.00K 0.00K Hail (1.00)The public reported pea to quarter sized hail along with wind gusts estimated to 60 mph or greater.Boyd County1 SW Naper 08 1428CST 0 0 0.00K 0.00K Hail (1.75)Holt County1 W Atkinson 08 1430CST 0 0 0.00K 0.00K Hail (1.00)Boyd County2 SW Naper 08 1446CST 0 0 0.00K 0.00K Heavy RainLaw enforcement reported 2 inches of rain fell in less than 20 minutes.Holt County2 ESE (ONL)O Neill Arpt 08 1447CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)A Law Enforcement Officer reported straight line winds up to 70 mph and very heavy rainfall on the north edge of O'Neill.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Holt County2 ESE (ONL)O Neill Arpt 08 1456CST 0 0 0.00K 0.00K Funnel CloudAn Officer reported a brief funnel cloud on the northeast side of O'Neill.Holt County2 ESE (ONL)O Neill Arpt 08 1536CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public estimated thunderstorm winds at 52 knots.A surface trough extended south through central Nebraska and became the focus for severe thunderstorms by mid afternoon. Adisturbance lifted east from Wyoming across central South Dakota and provided lift in addition to jet dynamics that increasedshear for supercell thunderstorm development. The severe thunderstorms produced large hail up to 2 inches, damaging windsand heavy rainfall. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Deuel County4 W Chappell 09 1920MST 0 0 0.00K 0.00K Hail (1.50)Arthur County1 E Arthur 09 2123MST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)A spotter reported winds up to 65 mph with very heavy rain and visibility at 100 yards.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.287

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, CentralArthur County1 E Arthur 09 2140MST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A spotter reported 2 1/3 inch diameter tree limbs down in Arthur.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Thomas CountyHalsey 10 0000CST 0 0 0.00K 40.00K Thunderstorm Wind (52EG)The public reported large mature ash trees downed in Halsey and in the Nebraska National Forest. Highway 86B was closedinto the Halsey Forest due to tree damage.A surface trough extended south through western Nebraska on August 9th. Deep moisture was in place and resultingthunderstorms produced heavy rainfall, several wind and hail reports as the thunderstorms moved east across western Nebraska.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Holt County7 NNW Stuart 16 1245CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)A fast moving supercell thunderstorm produced severe criteria wind gusts north of the Stuart area.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Holt County3 N Atkinson 16 1308CST 0 0 0.00K 0.00K Thunderstorm Wind (70EG)A fast moving supercell thunderstorm produced severe criteria wind gusts north of Atkinson.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Holt County2 NNW Stuart 16 1308CST 0 0 10.00K 0.00K Thunderstorm Wind (65EG)A metal pole building was blown off it's foundation due to wind gusts associated with a severe thunderstorm. Power lines werealso blown down.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Holt County3 E Emmet 16 1329CST 0 0 0.00K 0.00K Hail (0.88)Holt County2 ESE (ONL)O Neill Arpt 16 1329CST 0 0 0.00K 0.00K Thunderstorm Wind (65EG)Thunderstorms produced severe criteria wind gusts in the O'Neill area.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Holt County1 SW (ONL)O Neill Arpt 16 1330CST 0 0 0.00K 0.00K Thunderstorm Wind (59MG)Severe criteria wind gusts were observed at the O'Neill airport from a fast moving supercell thunderstorm.Note: The measured wind gust of 59 knots is equivalent to 68 mph.Holt County1 SE Ewing 16 1403CST 0 0 0.00K 0.00K Thunderstorm Wind (70EG)Severe criteria wind gusts were reported in Ewing from a fast moving supercell thunderstorm.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Custer County10 S Arnold 16 1615CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Severe criteria winds gusts were reported from a thunderstorm south of the Arnold area.An upper level disturbance helped spark scattered thunderstorms, some of which were severe, across Nebraska during the latemorning and afternoon hours on August 16th. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.288

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, CentralFrontier County5 NW Harry Strunk Lake 19 1625CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A farmer estimated 60 mph thunderstorm wind gusts that shook a 25000 pound diesel tractor.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Brown County22 S Long Pine 19 1715CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Public estimated winds at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Rock County8 S Newport 19 1756CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Public estimated thunderstorm wind gusts to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Loup County6 W Almeria 19 1800CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public estimated that thunderstorm wind gusts were in excess of 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Rock County11 E Rose 19 1825CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public reported wind gusts in excess of 60 mph with torrential rainfall.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Boyd County4 WSW Bristow 19 1842CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A NWS Cooperative Weather Observer reported wind gusts to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Holt County1 NW Swan Lake 19 1850CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A Cooperative Observer estimated 60 mph thunderstorm wind gusts at Swan Lake.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Holt County9 NNW Amelia 19 1857CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public reported wind gusts to 60 mph.A surface trough bisected the forecast area August 19th. Dry air in place led to high based thunderstorm development. By earlyafternoon thunderstorms developed in the west then intensified while moving east that produced damaging winds in areas eastof highway 83. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Frontier CountyStockville 30 1425CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public reported winds downed tree branches at least 4 inches in diameter.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Frontier County1 E Curtis 30 1430CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A spotter reported four to eight inch diameter tree branches down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.289

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, CentralCuster CountyWeissert 30 1530CST 0 0 25.00K 0.00K Thunderstorm Wind (52EG)A garage was leveled with the roof blown 100 yards to the north. The garage siding was wrapped around trees. The rest of thebuilding was laying on the ground in a pile.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Brown County1 W Ainsworth 30 1540CST 0 0 800.00K 0.00K Thunderstorm Wind (70EG)A storm hit Ainsworth with damage significant that included the destruction of two buildings and many trees. Power lines werealso downed by the winds and resulted in a power outage that lasted about two hours. The damage was most severe in arelatively concentrated zone, on the north side of the town, which is consistent with a microburst damage path. It was in thatarea where one of the buildings was destroyed. Debris from the steel building was scattered to the north up to 200 yards, andsteel was twisted violently around trees north of the building site.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Wet microburst creates significant damage at Ainsworth, Nebraska on August 30, 2010. Image provided byKBRB radio station.Brown County1 W Ainsworth 30 1540CST 0 0 40.00K 0.00K Thunderstorm Wind (70EG)Winds destroyed a 90 by 30 building.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Brown County1 W Ainsworth 30 1543CST 0 0 0.00K 0.00K Hail (1.00)Blaine County9 NE Brewster 30 1610CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public estimated winds at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Keya Paha County3 SE Mills 30 1617CST 0 0 0.00K 0.00K Hail (1.00)Keya Paha County3 SE Mills 30 1617CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public estimated winds at 50 to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.290

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, CentralGarfield County14 NNE Burwell 30 1650CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Strong winds to 60 mph wrapped tin around a post.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Holt County2 ESE (ONL)O Neill Arpt 30 1710CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Holt County6 S Chambers 30 1718CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Local Fire and Rescue estimated with to 61 knots.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Boyd CountyLynch 30 1742CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public estimated winds to 60 mph.High based thunderstorms developed by mid afternoon August 30th. The thunderstorms cut two swaths of significant winddamage and reports. The most significant damage occurred at Ainsworth, in Brown County, where a wet microburst laid out apath of damage at 440 PM CDT when thunderstorm wind gusts were estimated to reach 80 mph. Note: The estimated windgust of 52 knots is equivalent to 60 mph.NEBRASKA, EastCass County2 NNW Plattsmouth4 S Union01180000CST1730CST 0 0 5.00K 0.00K FloodThis flooding carried over from June and July when heavy rain over much of eastern Nebraska and western Iowa during thosemonths causing a prolonged period of flooding along the Missouri River, especially downstream of Omaha through Rulo.Although the river at Plattsmouth dropped below flood stage on July 8th, it remained high all of July climbing back above floodstage in the middle of the month and again several times late in the month into August. In Plattsmouth, the Missouri Rivercrested a little over 33 feet in the late afternoon of June 22nd, flood stage is 26 feet. A July crest of around 29.5 feet wasobserved on the first with a crest of around 29 feet in August was seen on the 4th. Some roads on the east end of Plattsmouthwere closed due to flood waters which also submerged the land around a waste-water treatment plant which promptedsandbagging. A recreation area in the region was also partially submerged in flood waters. Most of the damage and moresignificant flooding was observed in June and July.Douglas County1 WNW East Omaha2 SE Albright01 0000CST 0 0 20.00K 0.00K Flood17This flooding carried over from June and July after persistent and heavy rains during those months combined with increasedreleases from Gavin's Point Dam and caused the Missouri River to approach its 29 foot flood stage several times in July andalso in early August. The high water flooded some parks in the flood plain including N.P. Dodge park causing its closure. Thehigh water continued into August and eventually prompted the closure of N.P. Dodge Park for the season and causing 20,000dollars in lost revenue for the city of Omaha.Nemaha County4 NW Peru1 S Nemaha01280000CST1245CST 0 0 5.00K 0.00K FloodHeavy rain over much of eastern Nebraska and western Iowa during most of June caused a prolonged period of flooding alongthe Missouri River, especially downstream of Omaha through Rulo. The river near Brownville climbed above flood stageduring the afternoon on June 11th and remained above flood stage through July and for most of August. The prolongedflooding was aided by additional rain in July and increased releases from upstream reservoirs. The river at Brownville crestedat close to 43 feet during the evening of June 23rd, flood stage is 32 feet. During July the river crested a little under 39 feet forthe first several days of the month and in August the crest was a little over 38 feet on the 5th. Besides considerable flooding oflowlands along the river, several roads were flooded including one that lead to the Cooper Nuclear power plant. Recreationareas also sustained flood damage, but most of the damage was done in June and July.291

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, EastOtoe County7 NNW Nebraska City Arpt 01180000CST1730CST 0 0 5.00K 0.00K FloodHeavy rain over much of eastern Nebraska and western Iowa during most of June caused a prolonged period of flooding alongthe Missouri River, especially downstream of Omaha through Rulo. The river near Nebraska City climbed above flood stageearly in the afternoon on June 11th and remained above flood stage for most of July into August. The flooding was aided byadditional rains in July and increased releases from upstream reservoirs. The river at Nebraska City crested around or a littleover 25 feet during the afternoon of June 16th and June 21st and started July out a little under 22 feet. The crest during Augustwas almost 21.5 feet on the 5th. Flood stage is 18 feet. Industrial roads near the river were flooded along with some cabins,boat ramps and recreation areas, with most of the flooding damage observed in June and early July.Richardson County3 N Barada4 S Rulo01210000CST0200CST 0 0 5.00K 0.00K FloodHeavy rain over much of eastern Nebraska and western Iowa during most of June caused a prolonged period of flooding alongthe Missouri River, especially downstream of Omaha through Rulo. The river at Rulo reached a record crest of around 26.6feet during the evening of 6/24, flood stage is 17 feet. The river remained above flood stage through July and into August, withthe high water aided by additional rains and increased releases from upstream reservoirs. A July crest of just under 23 feet lateon the 5th was observed and an August crest of a little under 21 feet was measured on the 6th. Highway 159 near Rulo wasclosed for a time in June and July and substantial flooding of lowlands along the river occurred including cabins and recreationareas. At least 20 homes along the river were evacuated in June when flooding forced 30 to 40 people to find other shelter.Most of the damage and evacuations occurred in June and July.Sarpy County2 NNW Avery 01 0000CST 0 0 5.00K 0.00K Flood17This flooding carried over from June and July when heavy rain over much of eastern Nebraska and western Iowa during thosemonths causing a prolonged period of flooding along the Missouri River, especially downstream of Omaha through Rulo.Although the river at Plattsmouth dropped below flood stage on July 8th, it remained high all of July climbing back above floodstage in the middle of the month and again several times late in the month into August. Parks and a few roads were closed inSarpy county along the Missouri River due to flood waters. In Plattsmouth, just south of Sarpy county, the Missouri Rivercrested a little over 33 feet in the late afternoon of June 22nd, flood stage is 26 feet. A July crest of around 29.5 feet wasobserved on the first with a crest of around 29 feet in August was seen on the 4th.Heavy rain in June caused the Missouri River to flood from around Omaha downstream through Rulo. Additional heavy rainsin July and increased releases from upstream reservoirs caused either high water or flooding to persist into August.Platte County5 SE (OLU)Columbus Arpt 01 2320CST 0 0 Thunderstorm Wind (50EG)Thunderstorm wind gusts estimated at close to 60 mph blew the roof off of a farm outbuilding and a trailer house and alsobroke the window of a home. The time was estimated by radar.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Douglas County2 N Boys Town 02 0215CST 0 0 70.00K 0.00K LightningA lightning strike caused a house fire in northwest Omaha.Scattered thunderstorms developed over northeast Nebraska during the late evening/early morning hours of August 1st and 2nd.The storms formed on the nose of a low level jet. An isolated storm east of Columbus produced wind damage, but the stormsmainly dropped heavy rain with some locations around the Norfolk area receiving over 3 inches of rain.NEZ067-088>093Cass - Gage - Jefferson - Johnson - Nemaha - Otoe - Pawnee - Richardson02 1300CST1900CST 0 0 0.00K 0.00K HeatTemperatures reached the 90s to around 100 degrees during the afternoon and early evening of August 2nd across southeastNebraska. When combined with dew point temperatures in the upper 70s to lower 80s, heat index values climbed into the 105to 115 degree range for several hours and in the southeast Corner of Nebraska they even briefly touch 120 degrees.292

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, EastDouglas County1 W Elkhorn1 SE Albright03 2054CST2130CST 0 0 Hail (3.00)Hail up to 3 inches in diameter fell across sections of Omaha. Hail up to 1.5 inches in diameter was first observed in theElkhorn area with 2.75 to 3 inch hail reported from 1010pm CDT through 1027pm near 114th and Center, 84th and F, 60th andL, and 72nd and Harrison Streets. The last report of large hail was in the Downtown area around 1030pm when quarter-sizehail fell. The larger hailstones appeared to fall from the west central to southern parts of town, with nickel-size hail reportednear 156th and Blondo Streets one of the larger hail reported north of Dodge Street. The hail damage was not widespread butone large insurance company stated that calls reporting damage from 43 homes and 63 autos came in by the next day.However, what damage did occur was significant and in some cases whole windshields were busted out along with large dentsand significant siding damage to a few homes.Sarpy County1 NNE Papillion1 SE AveryPicture of hail in west central Omaha ranging up to 3 inches in diameter.03 2123CST2140CST 0 0 Hail (3.00)Hail up to 3 inches in diameter fell from the La Vista area southeast through Bellevue, especially the north part of that town.The larger hail in Sarpy county was reported in the La Vista area, with 2.5 inch hail reported in Papillion near 72nd and Gilesand 1 to 1.5 inch hail reported in Bellevue. The hail caused scattered vehicle damage.Saline County1 W Wilber 03 2203CST 0 0 Hail (1.25)Hail up to half dollar-size fell in the Wilber area causing minor damage to several vehicles and a few roofs.Gage County2 ESE Clatonia 03 2225CST 0 0 0.00K 0.00K Hail (1.00)Johnson County1 NW Tecumseh Arpt 03 2313CST 0 0 Thunderstorm Wind (50EG)Thunderstorm wind gusts estimated at close to 60 mph downed or split a few 12 to 14 inch diameter tree limbs along with othersmaller branches. Time was estimated based on radar.Thunderstorms developed across eastern Nebraska and southwest Iowa during the evening north of a weak stationary front.One storm that tracked across the southern part of Omaha and northern Sarpy county dropped very large hailstones, some aslarge as baseballs. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.293

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, EastNEZ045-051>053-065>068-078-090>093Cass - Douglas - Johnson - Lancaster - Nemaha - Otoe - Pawnee - Richardson - Saline - Sarpy - Saunders -Seward - Washington08121200CST1900CST 0 0 0.00K 0.00K Excessive HeatNEZ011-015>018-030>034-042>044-050-088>089Antelope - Boone - Burt - Butler - Cedar - Colfax - Cuming - Dodge - Gage - Jefferson - Knox - Madison -Pierce - Platte - Stanton - Thurston - Wayne08 1200CST1800CST 0 0 0.00K 0.00K HeatA ridge of high pressure aloft over the plains allowed a prolonged period of hot and very humid conditions to persist acrosseastern Nebraska and southwest Iowa for a large part of the second week of August. Daytime highs over much of the areareached the 90s with dew point temperatures often in the 75 to 80 degree range. This created heat index values that oftenreached around 105 to 110 degrees and sometimes 115 or hotter. The highest heat index values during this period were nearand south of Omaha toward Falls City and then into extreme southwest Iowa where afternoon values often reached 110 orhigher during this stretch. Several episodes of thunderstorm activity brought temporary relief to some areas during this stretch,mainly to northeast Nebraska.Knox County16 W Verdigre 08 1520CST1530CST 0 0 Thunderstorm Wind (55EG)Thunderstorm winds estimated at over 60 mph caused tree and other damage from around 16 miles west of Verdigre intoVerdigre. Sixteen KV transmission lines/poles were downed 16 miles west of Verdigre causing loss of power in severalsurrounding towns for around 3 hours, with trees or large tree limbs downed from that location into Verdigre.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Cedar County3 NNE Aten 08 1615CST 0 0 Thunderstorm Wind (60EG)Thunderstorm wind gusts estimated at around 70 mph downed numerous trees and broke large limbs in the NebraskaTailwaters campground just southeast of Gavins Point Dam.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Knox County2 NW Bloomfield Muni Arpt 08 1641CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public estimated thunderstorm winds reached 60 mph which occurred with very heavy rain and near zero visibility.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pierce County1 SW Osmond 08 1701CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Local law enforcement estimated thunderstorm wind gusts around 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pierce County10 SSW Foster 08 1730CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public estimated a thunderstorm wind gust of around 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Boone County1 NE Petersburg 08 1835CST 0 0 0.00K 0.00K Hail (1.25)Madison County7 NNW Newman Grove 08 1857CST 0 0 Hail (1.75)A few hail stones reached golf ball-size.294

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, EastThurston County1 W Walthill 08 1920CST 0 0 Thunderstorm Wind (60EG)Thunderstorm winds estimated at close to 70 mph downed numerous trees which downed power lines in the Walthill area. Atleast one tree fell on a car causing substantial damage.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Madison County1 NNW Madison 08 1935CST 0 0 0.00K 0.00K Hail (1.00)Madison County1 NE Madison 08 1938CST 0 0 0.00K 0.00K Hail (0.88)Cuming County1 NE West Pt 08 2024CST 0 0 Thunderstorm Wind (56EG)Thunderstorm wind gusts estimated at over 60 mph knocked power lines down causing loss of power to parts of town.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Burt County1 S Tekamah Arpt 08 2056CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)The Asos at Tekamah measured a thunderstorm wind gust of 60 mph.Scattered strong to severe thunderstorms developed on a wind shift boundary over the Nebraska sandhills during the afternoonof August 8th. With temperatures in the 90s and dew point temperatures in the 70s ahead of the thunderstorms, the extremelyunstable conditions allowed the thunderstorms to maintain their intensity as they tracked across northeast Nebraska into westcentral Iowa during the afternoon and evening of August 8th. Note: The measured wind gust of 52 knots is equivalent to 60mph.Gage County2 SE Odell 10 1828CST 0 0 Hail (1.00)The hail was accompanied by thunderstorm winds estimated at 70 mph that flattened corn in the area.Gage County2 SSE Odell 10 1828CST 0 0 Thunderstorm Wind (61EG)Thunderstorm winds estimated at 70 mph flattened corn in the area and was accompanied by 1 inch hail.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Gage County1 S Blue Spgs 10 1850CST 0 0 Thunderstorm Wind (61EG)Thunderstorm wind gusts estimated at 70 mph downed several trees in the area at least one of which fell onto a home.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Jefferson County2 WNW Harbine 10 1901CST 0 0 0.00K 0.00K Hail (0.88)Mostly pea-size, but some up to nickel-size.Gage County3 SW Virginia 10 1910CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)The public estimated thunderstorm wind gusts of 70 mph.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Gage County2 ENE Hoag 10 1923CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A spotter estimated thunderstorm wind gusts reached 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.295

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, EastLancaster County1 E Roca 10 2010CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public estimated thunderstorm wind gusts were around 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cass County1 S Cedar Creek 10 2100CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A spotter estimated a thunderstorm wind gust of 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cass County2 E Cullom 10 2114CST2119CST 0 0 0.00K Hail (1.00)The hail lasted for 5 minutes and was accompanied by winds of around 40 mph.Cass CountyPlattsmouth 10 2120CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm wind gusts estimated at 55 to 60 mph downed a 4 inch in diameter tree limb.Sarpy County1 NNW Avery1 S (OFF)Offutt AfbNote: The estimated wind gust of 50 knots is equivalent to 58 mph.10 2125CST2132CST 0 0 Thunderstorm Wind (64MG)The Automated weather sensor at Offutt AFB measured a thunderstorm wind gust of 74 mph. The winds downed numeroustree limbs and large trees with the Olde Towne area especially hard hit where at least 4 streets were blocked and several powerpoles were broken along with downed power lines. Some damage to homes and vehicles also occurred in this area. Around1,700 people lost power for a while.A small cluster of thunderstorms developed during the early evening of August 10 southwest of Beatrice on a weak boundarythat mainly proved to be a wind shift. Temperatures and dew point temperatures were in the lower to mid 90s and mid 70srespectively on both sides of the boundary providing extremely unstable conditions. One of the thunderstorms periodicallyproduced damaging winds as it pulsed between severe and non-severe from southeast Nebraska into southwest Iowa. Note:The measured wind gust of 64 knots is equivalent to 74 mph.NEZ034Burt11121400CST1800CST 0 0 0.00K 0.00K HeatNEZ011-015>018-030>033-042>044-050-088>089Antelope - Boone - Butler - Cedar - Colfax - Cuming - Dodge - Gage - Jefferson - Knox - Madison - Pierce -Platte - Stanton - Thurston - Wayne12 1200CST1900CST 0 0 0.00K 0.00K HeatA ridge of high pressure aloft over the plains allowed a prolonged period of hot and very humid conditions to persist acrosseastern Nebraska and southwest Iowa for a large part of the second week of August. Daytime highs over much of the areareached the 90s with dew point temperatures often in the 75 to 80 degree range. This created heat index values that oftenreached around 105 to 110 degrees and sometimes 115 or hotter. The highest heat index values during this period were nearand south of Omaha toward Falls City and then into extreme southwest Iowa where afternoon values often reached 110 orhigher during this stretch. Several episodes of thunderstorm activity brought temporary relief to some areas during this stretch,mainly to northeast Nebraska.Antelope County1 W Clearwater 16 1419CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A spotter estimated thunderstorm winds of around 60 mph downed some small tree limbs.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.296

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, EastAntelope CountyNeligh 16 1428CST1430CST 0 0 Thunderstorm Wind (65MG)A storm chaser measured a thunderstorm wind gust of 75 mph on home weather equipment. The winds downed several 4 to 6inch in diameter tree limbs in town.Weak warm advection caused a small area of thunderstorms to develop in south central South Dakota early in the afternoon ofAugust 16. One of the thunderstorms gained strength and turned severe producing damaging winds as it tracked southeastacross the Neligh area. The storm then weakened as it encountered slightly more stable air. Note: The measured wind gust of65 knots is equivalent to 75 mph.Knox County1 SE Verdel 30 1740CST 0 0 0.00K Thunderstorm Wind (60EG)A spotter estimated thunderstorm winds gusted to nearly 70 mph. The strong winds downed large tree branches in the area.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Antelope County1 N Brunswick 30 1820CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)A trained spotter estimated thunderstorm wind gusts reach around 65 mph in the area.Thunderstorms developed in central Nebraska ahead of a slow moving cold front during the afternoon of August 30th. Thestorms moved across northeast Nebraska during the evening hours and produced a few reports of severe criteria winds. Note:The estimated wind gust of 56 knots is equivalent to 64 mph.Gage CountyBarneston 31 1643CST 0 0 Hail (1.00)The thunderstorm also produced wind gusts estimated at 60 mph which downed large tree limbs in the area.Gage County1 W Barneston 31 1650CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm wind gusts estimated at around 60 mph downed large tree limbs in the area. The winds were accompanied byhail around an inch in diameter.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Gage CountyLiberty 31 1655CST 0 0 Thunderstorm Wind (55EG)Thunderstorm winds estimated at over 60 mph blew a 20 by 40 foot metal sheet from a farm shop building onto a neighborstree. The time was estimated by radar but it was probably from the same storm that caused some tree damage just to thesouthwest near Barneston.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Jefferson County4 W Daykin 31 1710CST 0 0 0.00K 0.00K Hail (1.00)Douglas County1 NE Waterloo 31 2100CST2108CST 0 0 0.00K Hail (1.75)Hail around 1 inch in diameter was reported in the Waterloo area with golf ball-size reported just to the northeast of town.Douglas County1 W Valley 31 2108CST 0 0 0.00K 0.00K Hail (1.50)Hail up to 1.5 inches in diameter was measured at the NWS office just northwest of Valley. The hailstones were mostly 1/2inch or smaller.Douglas County1 W Elkhorn 31 2112CST 0 0 0.00K 0.00K Hail (1.00)Hail around 1 inch in diameter was measured by an off duty NWS employee in the Elkhorn area near 208th and Maple Streets.297

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, EastDouglas County3 ENE Elk City 31 2121CST 0 0 0.00K 0.00K Hail (1.00)NEBRASKA, Extreme NortheastNear the Jct of Highways 31 and 36.An unstable air mass in southeast Nebraska and southwest Iowa and a moderately strong low level jet helped thunderstormsdevelop ahead of a cold front in southwest Iowa with additional storms developing from northeast Kansas into southeastNebraska. The storms produced some damaging winds and large hail and also isolated areas of very heavy rainfall. Later thatevening a shallow cold front pushed into the region but winds above the front remained from the south or southwest whichallowed isolated elevated storms to develop north of the front. One storm that moved just to the west of Omaha produced largehail before weakening.Dixon County6 N Dixon 08 1725CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including numerous branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Dakota CountySouth Sioux City 08 1755CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)NEBRASKA, Extreme SouthwestThunderstorm winds caused widespread tree damage, including a few large trees and numerous branches blown down.Thunderstorms produced strong winds which caused tree damage several miles north of the town of Dixon, and also in SouthSioux City, on the late afternoon of August 8th. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Dundy County7 NNE Max 03 1953MST 0 0 0.00K 0.00K Hail (2.75)Nearby corn fields were heavily damaged by the combination of wind and hail.Hitchcock CountyStratton 03 2105CST 0 0 0.00K 0.00K Hail (1.75)Report from the Stratton Fire Department was relayed to NWS through county law enforcement.Hitchcock County8 S Culbertson 03 2157CST 0 0 0.00K 0.00K Thunderstorm Wind (74MG)Pea sized hail was also occurring at the time of this report.Note: The measured wind gust of 74 knots is equivalent to 85 mph.Red Willow CountyMc Cook 03 2223CST 0 0 0.00K 0.00K Thunderstorm Wind (61MG)Many tree branches were blown down in the town of McCook.Note: The measured wind gust of 61 knots is equivalent to 70 mph.Red Willow County1 WNW Bartley 03 2245CST 0 0 0.50K 0.00K Thunderstorm Wind (65EG)Large tree was blown down by thunderstorm winds.Severe thunderstorms rolled across southern Nebraska during the evening, packing winds of 85 mph and golf ball to baseballsized hail. Corn fields were stripped and large trees blown down from Dundy county east to Red Willow county. Note: Theestimated wind gust of 65 knots is equivalent to 75 mph.Red Willow CountyMc Cook 16 2002CST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Thunderstorms moved along the Kansas-Nebraska border during the evening, resulting in an isolated report of 64 mph winds inMcCook. Note: The measured wind gust of 56 knots is equivalent to 64 mph.298

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, Extreme SouthwestRed Willow CountyMc Cook 19 1555CST 0 0 0.00K 0.00K Thunderstorm Wind (58MG)Thunderstorms moved across Red Willow county during the afternoon, producing strong winds reaching 67 mph at McCook.Note: The measured wind gust of 58 knots is equivalent to 67 mph.Red Willow County2 N (MCK)Mc Cook Arpt 30 1402CST 0 0 41.00K 0.00K Thunderstorm Wind (70EG)An apparent microburst in McCook resulted in a small area of damage. A 6000 square foot section of roof was torn from thelocal lumberyard and the sheet metal wrapped around and damaged several vehicles causing severe body and tire damage. Alight pole was downed and a nearby car dealership sustained damage. A peak wind gust of 59 mph occurred at the airport asmeasured by ASOS, but damage in town occurred from an estimated 80 mph wind gust.NEBRASKA, South CentralThunderstorms developed during the afternoon and moved northeast across Red Willow county. One storm produced amicroburst in McCook resulting in roof, vehicle and building damage in town. The automated station at the airport reported a59 mph wind gust, but winds in town are estimated to have been near 80 mph. Note: The estimated wind gust of 70 knots isequivalent to 81 mph.Dawson County7 NNE Farnam 03 1937CST1942CST 0 0 0.00K 0.00K Hail (1.75)Dawson County4 NNE Farnam 03 1938CST1948CST 0 0 0.00K 0.00K Hail (2.75)Dawson County4 NE Farnam 03 1946CST 0 0 0.00K 0.00K Hail (1.75)Dawson County4 NE Farnam 03 1946CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated at 70 MPH.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Dawson County7 ENE Farnam 03 2001CST2007CST 0 0 0.00K 0.00K Hail (1.75)Gosper County3 W Smithfield 03 2054CST 0 0 0.00K 0.00K Hail (1.50)Phelps County2 N Bertrand 03 2112CST 0 0 0.00K 0.00K Hail (1.50)Phelps County3 NW Loomis 03 2128CST 0 0 0.00K 0.00K Hail (0.88)Furnas County3 S Cambridge 03 2305CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated at 60 MPH.299

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, South CentralThis was an active Tuesday evening of severe weather across western portions of South Central Nebraska, mainly affectingDawson, Gosper, Phelps and Furnas Counties. Storms initially developed just west of the area across Lincoln County early inthe evening, as the airmass destabilized to the north of a weak surface front/outflow boundary stretched across northern Kansas.The mesoscale environment featured mixed-layer CAPE of 2000-3000 J/kg, but only modest deep-layer vertical wind sheararound 30 knots. However, one right-moving supercell storm became severe, and was responsible for most of the hail and windreports during the evening. This storm mainly affected southwest Dawson County, northern Gosper County, and parts of PhelpsCounty before weakening near Bertrand well after sunset. This storm featured a several-mile-long swath of quarter to golf ballsize hail that damaged crops, with even larger hail up to baseball size reported in areas just north and east of Farnam, wherewind gusts estimated to 70 MPH also occurred. Although no tornadoes were sighted with this storm, spotters reported arotating wall cloud in Gosper County, prompting the first tornado warnings in over six weeks within South Central Nebraska.As the initial supercell weakened, a new complex of strong to severe storms flared up across Southwest Nebraska, and pushedeast into Furnas County around midnight, resulting in estimated 60 MPH winds near Cambridge. Note: The estimated windgust of 52 knots is equivalent to 60 mph.Sherman CountyLitchfield 05 1524CST 0 0 0.00K 0.00K Hail (1.00)Buffalo County2 N Pleasanton 05 1549CST 0 0 0.00K 0.00K Hail (0.88)Buffalo County2 N Pleasanton 05 1549CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Winds gusts estimated at 70 MPH.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Buffalo County4 SW Ravenna 05 1624CST 0 0 0.00K 0.00K Hail (0.75)Already by the early afternoon hours on this Thursday, a cluster of strong to severe thunderstorms was underway across theSandhills of North Central Nebraska, with this activity eventually moving southeast into western portions of South CentralNebraska by mid to late afternoon. These storms initially organized near a weak surface low, in a mesoscale environmentcharacterized by mixed-layer CAPE around 1500 J/kg, but rather modest deep-layer vertical wind shear of only around 30knots. For a short time, a few of these storms became severe, producing quarter size hail in Litchfield, and estimated wind guststo 70 MPH near Pleasanton. However, as the east-west oriented storm complex drifted toward Interstate 80 it steadilyweakened, and all but faded away south of the I-80 corridor by sunset.Harlan County4 S Republican City 12 1535CST 0 0 0.00K 0.00K Hail (1.50)Franklin CountyFranklin 12 1545CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Numerous tree limbs were knocked down, including some that were 4 to 6 inches in diameter. Other reports included a storagebuilding being destroyed and damage done to a home's patio roof.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Webster County2 W Inavale 12 1612CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated at 60 MPH, knocking a tree down onto Highway 136.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Adams County(HSI)Hastings Arpt 12 2321CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Peak gust of 59 MPH was associated with a collapsing thunderstorm in the area.300

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, South CentralAs temperatures soared to over 100 degrees on this Thursday afternoon, a cluster of high-based severe thunderstormsdeveloped along a subtle low-level convergence zone in far South Central Nebraska, mainly affecting Harlan, Franklin andWebster Counties. At the time of storm initiation, mixed-layer CAPE values were around 2000 J/kg, but deep-layer verticalwind shear was quite weak, only around 25 knots, resulting in slow-moving, outflow-dominant storms. Early on in the event,ping pong ball size hail was reported near the east end of Harlan County Lake. However, damaging winds were moreprominent, with estimated gusts to 70 MPH in Franklin resulting in numerous downed tree branches, and a destroyed storagebuilding.Although the initial cluster of storms weakened considerably by late afternoon, the late evening hours brought isolated stormdevelopment to the Highway 6 corridor. Just as one small, isolated storm neared Hastings shortly after midnight, it began tocollapse, resulting in the sudden onset of strong winds, with a 59 MPH peak gust measured at Hastings Municipal Airport. Infact, gusts of 45 to 55 MPH lasted for several minutes in the Hastings area. Note: The measured wind gust of 51 knots isequivalent to 59 mph.Adams CountyKenesaw 23 1858CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated at 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Adams CountyAyr 23 2052CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall at this time was 4.5 inches, and rain was still falling at the time of measurement.Adams County1 N Ayr 23242100CST0200CST 0 0 0.00K 0.00K FloodAdams County2 NW Ayr 23 2105CST 0 0 0.00K 0.00K Heavy RainWater over the road.Adams CountyAyr 24 0600CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall amount was 4.72 inches.Adams County1 W Pauline 24 0600CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall amount was 5.1 inches.Adams County5 ESE Ayr 24 0600CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall amount was 5.7 inches.Clay County6 ESE Clay Center 24 0600CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall amount was 4.1 inches.Clay County4 ENE Fairfield 24 0600CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall amount was 4.4 inches.Clay County5 SSE Clay Center 24 0600CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall amount was 5.1 inches.301

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, South CentralFranklin County3 WSW Riverton 24 0600CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall amount was 3.43 inches.Thayer CountyHubbell 24 0600CST 0 0 0.00K 0.00K Heavy RainStorm total rainfall amount was 3.3 inches.A well-defined cold front plowed into South Central Nebraska on this Monday afternoon and evening, driven by a seasonablystrong mid level shortwave trough tracking across the Northern Plains region. Storms initially fired up along the cold frontduring the early evening, generally along a line from near Alma to Grand Island to Fullerton. Around the time of storminitiation, the mesoscale environment featured around 2000 J/kg mixed-layer CAPE, but only around 25 knots of deep-layervertical wind shear, resulting in slow storm motion along the southeast-moving surface front. This slow storm motion teamedwith high precipitable water values around 2 inches to produce several pockets of locally very heavy rainfall and someflooding. In fact, over 5 inches of rain fell in southeast Adams County near Ayr and Pauline, which caused water to flow overHighways 74 and 281 for a short time. The Little Blue River at Deweese went into flood as well. Other pockets of heavy rainbetween 3-5 inches were reported in parts of Clay, Franklin and Thayer Counties. While very little severe weather occurredwith these storms, there was one report of estimated 60 MPH winds at Kenesaw in Adams County.Dawson County5 NNE Farnam 30 1445CST1450CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated at 60 MPH.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Dawson CountyGothenburg 30 1454CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Dawson County7 N Lexington 30 1505CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated at 70 MPH.During the mid to late afternoon hours on this Monday, a narrow line of fast-moving strong to severe thunderstorms with highwinds raked across western and northwest sections of South Central Nebraska, generally along a line from near Farnam,Johnson Lake and Lexington, northeast through the Arcadia and Ord areas. Although the mesoscale environment was notoverly unstable for this time of year, with mixed-layer CAPE values only around 1500-2000 J/kg, deep-layer vertical windshear had increased to around 40 knots, resulting in a seasonably rapid northeastward progression of the storms. Althoughseveral places within the path of these storms reported sub-severe wind gusts around 50 or 55 MPH, stronger winds focusedacross parts of Dawson County, with a measured 60 MPH gust in Gothenburg, and an estimated 70 MPH gust north ofLexington. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Thayer CountyChester 31 1626CST 0 0 0.00K 0.00K Hail (0.88)Thayer County3 SW Alexandria 31 1650CST 0 0 0.00K 0.00K Hail (0.75)Thayer County2 W Alexandria 31 1655CST 0 0 0.00K 0.00K Hail (1.25)Thayer CountyChester 31 1738CST 0 0 0.00K 0.00K Heavy RainRainfall total was 4 inches.As a cold front advanced into southeast portions of South Central Nebraska on this late Tuesday afternoon, a narrow, brokencorridor of strong to severe storms flared up along the boundary, primarily impacting Thayer County. These storms developedin a very moist and unstable airmass featuring around 3500 J/kg mixed-layer CAPE, along with around 30 knots of deep-layervertical shear. There were a few reports of hail up the size of half dollars in the Alexandria area. In addition, torrential rainfallup to 4 inches was measured in Chester along the Nebraska and Kansas state line.302

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEBRASKA, WestCheyenne County(SNY)Sidney Arpt 09 1908MST1909MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Cheyenne County(SNY)Sidney Arpt 09 1916MST1917MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)During the afternoon scattered thunderstorms developed over the Nebraska Panhandle. The combined effect of an upper leveldisturbance moving over the area and strong upper level winds aided in strengthening the convection. Note: The measuredwind gust of 52 knots is equivalent to 60 mph.NEVADA, NorthElko CountyElko Arpt3 WSW Coin06 1310PST1320PST 0 0 4.00K 0.00K Thunderstorm Wind (62MG)Thunderstorm winds gusting to 71 mph at the Elko Airport and 60 mph at the NWS office blew down several trees at the RubyView golf course and knocked down multiple large branches. These winds also knocked down several power lines in townwhich caused a couple of small fires which were quickly put out.Thunderstorm winds gusting up to 71 mph blew down a couple of trees at the Ruby View golf course and knocked downmultiple large branches. Note: The measured wind gust of 62 knots is equivalent to 71 mph.Humboldt County12 SE Orovada Rio King ArpMc Dermitt21 1600PST1800PST 0 0 0.00K Thunderstorm Wind (67MG)A wind gust to 77 mph was recorded at the Double H RAWS about 30 miles southwest of McDermitt. As the thunderstormmoved into McDermitt it blew down a large tree, overturned a storage shed, blew down a sign at the McDermitt Library, andblew off some shingles at the McDermitt Motel.Note: The measured wind gust of 67 knots is equivalent to 77 mph.Humboldt County12 SE Orovada 21 1900PST1905PST 0 0 0.00K 0.00K Thunderstorm Wind (59MG)NEVADA, SouthThunderstorm winds uprooted a large tree, blew over a storage shed, and toppled a sign at the library. Note: The measuredwind gust of 59 knots is equivalent to 68 mph.NVZ020Las Vegas Valley03061200PST1800PST 2 0 0.00K 0.00K HeatNVZ021Lake Mead/Lake Mohave National Recreation Area06 1200PST1800PST 1 0 0.00K 0.00K HeatThree people died of heat-related causes - two in the Las Vegas Valley, and one in the Lake Mead National Recreation Area.Temperatures were below locally defined Excessive Heat Warning criteria. M86OUClark County10 SSW Laughlin 07082330PST0030PST 0 0 1.00K 0.00K Flash FloodEight inches of water and debris flowed across Aha Macav Parkway.303

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEVADA, SouthClark County4 W Las Vegas N Air Term 08 1740PST 0 0 200.00K 0.00K LightningLightning struck a house, setting it afire.Clark County2 SSE Logandale 08 1806PST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A spotter estimated wind gusts to 60 mph, along with pea sized hail and very heavy rain.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clark County5 WNW Riverside 08 1815PST1825PST 0 0 20.00K 0.00K Hail (1.00)Large hail dented several cars on Interstate 15. The hail size is an estimate, and may be underestimated considering the natureof damage reported.Clark County1 ENE Logandale 08 1925PST2030PST 0 0 20.00K 0.00K Flash FloodDelayed-onset flash flooding caused by heavy rain one to two hours earlier washed out two streets and left at least two othersimpassable.An unseasonably deep Pacific trough interacted with monsoon moisture to produce scattered severe thunderstorms and flashflooding across the Mojave Desert.Clark County8 S Alunite 17 1600PST 0 0 15.00K 0.00K Thunderstorm Wind (45EG)Clark County19 WNW Moapa 1819Thunderstorm winds blew a big rig off U.S. Hwy. 95 near the Eldorado Dry Lake Bed.Note: The estimated wind gust of 45 knots is equivalent to 52 mph.2125PST0000PST 0 0 10.00K 0.00K Flash FloodNV Hwy. 168 was closed by flash flooding near the intersection of U.S. Hwy. 93.Monsoon moisture fueled scattered thunderstorms over the Mojave Desert. A few storms produced severe weather and flashflooding.Clark County2 SW Las Vegas Hndrsn Sky 26 1440PST 0 0 5.00K 0.00K Thunderstorm Wind (40EG)A carport on a mobile home was damaged.Note: The estimated wind gust of 40 knots is equivalent to 46 mph.Clark County3 SSE Henderson 27 2030PST2035PST 0 0 0.00K 0.00K Hail (0.88)Dime to nickel size hail fell for a few minutes.Clark County6 NE Boulder City 27 2105PST2115PST 0 0 300.00K 0.00K Thunderstorm Wind (61MG)An anemometer at the Las Vegas Boat Harbor measured a gust to 70 mph before failing. Several docks, including floatingdocks and a fueling dock, were damaged, and at least two private boats were damaged.Monsoon moisture fueled several rounds of thunderstorms over the Mojave Desert, with the greatest coverage of storms on the26th and 27th. Several storms produced severe weather and flash flooding. Note: The measured wind gust of 61 knots isequivalent to 70 mph.304

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEVADA, SouthNVZ017Western Clark/Southern Nye28 1215PST 0 0 0.00K 0.00K High WindAn unseasonably strong trough brought gusty winds to the Mojave Desert. One station recorded gusts over 50 knots.NEW HAMPSHIRE, North and CentralRockingham CountyExeter 05 1530EST 0 0 7.00K 0.00K LightningRockingham CountyNorth Hampton 05 1600EST 0 0 3.00K 0.00K LightningLightning struck two buildings in Rockingham County on Thursday evening, August 5. In Exeter, lightning ignited a fire in a20 ft by 20 ft shed. The shed and all its contents were destroyed. In North Hampton, lightning struck the ground and followedmetal piping and downspouts to a home where it blew a 3 ft diameter hole in the wall.NEW JERSEY, NortheastUnion County1 NNW Aldene 01 0905EST0920EST 0 0 0.00K 0.00K Flash FloodRoute 28 was closed in both directions in Cranford due to flooding.Essex County2 WNW Ampere 01 0930EST0945EST 0 0 0.00K 0.00K Flash FloodThe exit ramp was closed on Interstate 280 eastbound at exit 9 in West Orange due to flooding.Slow moving airmass thunderstorms developed over Northeast New Jersey. They produced torrential rain, which led to flashflooding in Union and Essex counties.Bergen County1 N Fair Lawn 16 1655EST 0 0 3.00K Thunderstorm Wind (52EG)Large tree limbs were reported down at the intersection of Plaza Road and Ramapo Terrace, temporarily closing the roadway.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Bergen County1 SW Ridgewood 16 1702EST 0 0 1.50K Thunderstorm Wind (52EG)A tree was reported down at the intersection of Morningside Road and Jackson Terrace in Midland Park.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Bergen County1 W Westwood 16 1705EST 0 0 30.00K LightningLightning struck a tree, then a house along North Pleasant Avenue in Ridgewood, causing a house fire. Two firefighters wereinjured fighting the fire.Bergen County1 ESE Ridgewood 16 1707EST 0 0 15.00K LightningLightning struck a garage on Franklin Avenue, causing a fire.Hudson CountyBayonne 16 1710EST 0 0 2.00K Thunderstorm Wind (52EG)A few trees were reported down in Bayonne.An approaching cold front triggered isolated severe thunderstorms, which impacted Bergen and Hudson Counties. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.305

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW JERSEY, South and NorthwestNJZ008Morris05 0900EST2359EST 0 0 0.00K 0.00K DroughtOn August 5th, the New Jersey Department of Environmental Protection issued a drought watch for northeast New Jerseyincluding Morris County. The Department of Environmental Protection urged residents in the watch to voluntarily reduceunessential water use due to a rapid decline in some reservoir levels. August continued the trend of a warmer and drier thannormal summer. On a statewide average, August 2010 was the 15th driest August on record (dating back to 1895) with 2.37inches of rain. The meteorological summer was the 10th driest (8.65 inches) on record dating back to 1895 in New Jersey andwas also the driest summer since 1966. At the Atlantic City International Airport, it was the fourth driest August (1.09 inches)and fifth driest meteorological summer (5.92 inches) on record. In Trenton, it was the third driest August (0.80 inches) and fifthdriest meteorological summer (5.90 inches) on record.NJZ007Warren06101200EST1700EST 0 0 0.00K 0.00K WildfireA wildfire near Sunfish Pond in the Worthington State Forest in the Delaware Water Gap National Recreational Area inPahaquarry Township in Warren County consumed about 250 acres of scrub and hardwood forest before it was contained. Thefire was first reported by a hiker on the afternoon of August 6th. It was located in a steep, remote, and inaccessible area. TheNew Jersey Forest Fire Service contained the fire on August 10th.NJZ015-017>019Camden - Gloucester - Mercer - Northwestern Burlington10110900EST1900EST 0 0 0.00K 0.00K Excessive HeatNJZ010-012-016-020>022-027Cumberland - Middlesex - Salem - Somerset - Southeastern Burlington - Western Atlantic - WesternMonmouth - Western Ocean10110900EST1900EST 0 0 0.00K 0.00K HeatAn up to four day heat wave across central and southern New Jersey culminated with high temperatures in the mid 90s andafternoon heat indices of around 100F on the 10th. A pair of backdoor cold fronts ended the hot weather on the 12th. Whilethere was a heat wave during the last couple of days in August (with many places recording the highest temperatures of themonth then), the 10th was the last time during 2010 that heat indices reached that high. Actual highest temperatures for the 10thand 11th included 97 degrees in Millville (Cumberland County) and Sicklerville (Gloucester County), 96 degrees in Trenton(Mercer County) and Woodstown (Salem County), 95 degrees in Somerville (Somerset County), Cream Ridge (MonmouthCounty), Cherry Hill (Camden County) and Lumberton (Burlington County) and 94 degrees at the Atlantic City InternationalAirport (Atlantic County) and New Brunswick (Middlesex County).August 2010 was the 4th warmest August on record at the Atlantic City International Airport with an average temperature of76.9 degrees and the 8th warmest August on record in Trenton (Mercer County) with an average temperature of 77.1 degrees.For the state of New Jersey as a whole, it was the 14th warmest August on record dating back to 1895. The summer of 2010was the warmest meteorological summer on record for the state of New Jersey dating back to 1895 with an average temperatureof 75.8 degrees. It was also the warmest summer on record in both Atlantic City (77.5 degrees) and Trenton (77.7 degrees).Salem CountyPittsgrove 12 0830EST 0 0 50.00K 1.00K LightningA positive cloud-to-ground lightning strike caused a barn fire just north of the Pole Tavern Traffic Circle on New Jersey StateRoute 77 in Upper Pittsgrove Township. Lightning struck the peak of the barn and traveled down through the silo. Sparks flewonto hay stored in the barn and started the fire. All 326 bales of hay along with heavy equipment were destroyed. No injurieswere reported.A shower and thunderstorm complex that moved through the southern part of New Jersey caused a barn fire in Salem County.NJZ024>026Eastern Atlantic - Eastern Cape May - Eastern Ocean13 0400EST2200EST 0 0 0.00K 0.00K Rip Current306

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW JERSEY, South and NorthwestThe strong northeast flow circulating around a high pressure system over New England produced numerous rip currents alongthe central and southern New Jersey Atlantic coast on the 13th. As the high pressure system settled closer to the state, on the14th, the enhanced rip current risk was reduced. On the 13th, a few water rescues occurred at Long Beach Township (OceanCounty) and Ocean City (Cape May County). At many beaches, swimmers were not permitted to go into the water deeper thantheir waists. A couple of scheduled lifeguard challenges were also postponed.Mercer County1 N Mt Rose 16 1535EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A severe thunderstorm knocked down several trees in Hopewell Township, a couple of which blocked roadways.Mercer County1 E Princeton1 NE Penns NeckNote: The estimated wind gust of 52 knots is equivalent to 60 mph.16 1540EST1545EST 0 0 1.00M 0.00K Thunderstorm Wind (56EG)A severe thunderstorm caused extensive tree damage on and to the east of Princeton University in Princeton Borough. Winddamage was reported from Nassau Street to Carnegie Lake. Several homes and vehicles were damaged by fallen trees alongHarrison Street, Sycamore Road and Cedar Lane. Four homes were badly damaged as were vehicles on the Butler Tract off ofHarrison Street. This included graduate student housing. Some students and families were evacuated to the Frist CampusCenter. On the university grounds itself, trees were knocked down around Palmer Stadium, along the intersection of FacultyRoad and Broadmead Street, Ivy Lane and along Washington Road. In Princeton Township, wind damage occurred on theopposite side of Carnegie Lake along Plainsboro Road as far east as Connector Road. Some roadways remained closed due tothe fallen trees into the 17th. Power was fully restored on the 18th. No injuries were reported.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Middlesex County2 S Monmouth Jct 16 1555EST 0 0 50.00K 0.00K LightningA lightning strike and the ensuing fire destroyed a vacant one story barn at the intersection of Friendship and New Roads inSouth Brunswick Township. It took about thirty firefighters forty-five minutes to extinguish the blaze.Middlesex CountyPlainsboro 16 1555EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A severe thunderstorm knocked down numerous trees in Plainsboro Township.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Middlesex County1 SE Cranbury 16 1605EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm knocked down large tree limbs in Cranbury Township.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Middlesex CountyJamesburg 16 1625EST 0 0 0.00K 0.00K Hail (0.75)Middlesex CountyJamesburg 16 1625EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm knocked down several large tree limbs in Monroe Township.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Monmouth CountyManalapan 16 1645EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm knocked down a couple of trees in Manalapan Township. One tree fell onto a home.307

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW JERSEY, South and NorthwestAn approaching cold front helped trigger some severe thunderstorms across central New Jersey during the late afternoon of the16th. The Princeton area was hit the hardest. About 2,600 homes and businesses lost power mainly in Mercer and MiddlesexCounties. Power was not fully restored until the 18th in Mercer County. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.Atlantic CountyAtlantic City 17 1525EST1730EST 0 0 0.00K 0.00K Flash FloodThunderstorms with torrential downpours caused flash flooding on Brigantine Island including Atlantic City. Flooding wasreported on many side streets and roadways toward Lakes and Absecon Bays in Atlantic City. Doppler Radar storm totalestimates reached 3.73 inches just west of Atlantic City. An actual storm total of 3.58 inches was measured in Margate City.Gloucester CountyMantuaWoodburyA sea breeze front helped trigger slow moving and regenerating thunderstorms across coastal Atlantic County includingAtlantic City.22 1525EST1526EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm downed large tree limbs and wires in Mantua Township and Woodbury City.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Gloucester CountyPitman 22 1540EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm downed large tree limbs and wires in Pitman Borough.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Gloucester County1 NE Williamstown 22 1550EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A severe thunderstorm downed large tree limbs and wires in Monroe Township.A line of showers and thunderstorms moved through southern New Jersey on the afternoon of the 22nd. Wind damage occurredin Gloucester County. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.NJZ014-024>026Eastern Atlantic - Eastern Cape May - Eastern Monmouth - Eastern Ocean28290500EST2300EST 0 3 0.00K 0.00K Rip CurrentSwells associated with Hurricane Danielle caused rougher surf and enhanced rip currents on the 28th and 29th along the NewJersey shore. There were hundreds of rescues and three reported injuries. Many beaches were closed and most others hadbathing and boogieing restrictions. In Ocean City (Cape May County), two children and one adult were injured on the 28th.There were over 100 rescues during the two day period. In Ocean County, there were about 50 ocean rescues in Long BeachTownship and about 60 around Barnegat Light. In Monmouth County, there were 110 rescues performed in Manasquan, 20swimmers had to be rescued at one time. Water rescues also occurred at Spring Lake and Bradley Beach. Waves at Sea Girtreached 6 to 8 feet on the 28th and 4 to 6 feet on the 29th. Swells subsided on the 30th and far fewer rescues and bathingrestrictions were in place.31 0700EST2359EST 1 0 0.00K 0.00K Rip CurrentNJZ024Eastern Cape May31 0700EST2359EST 0 0 0.00K 0.00K Rip CurrentA rip current claimed the life of a 23-year-old man on August 31st in Asbury Park (Monmouth County). The man was last seenswimming swimming at the Second Avenue Beach about 530 p.m. EDT on the 31st. He got into trouble after he lost his boogieboard and began swimming farther offshore to retrieve it. He disappeared about 30 yards off the beach in about 10 feet ofwater. His body was recovered off of the Asbury Avenue Beach near the Casino building about 60 yards offshore around 715a.m. EDT on September 2nd. His body was caught in what is known as a circle riptide. Rip currents also caused multiplerescues on August 31st in Ocean City (Cape May County).308

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW MEXICO, Central and NorthMckinley CountyManuelito 01 1530MST1645MST 0 0 87.00K 0.00K Flash FloodFlash flooding damaged Manuelito Canyon Road and nearby Manuelito Canyon.Mckinley County5 SW Prewitt 01 1700MST1800MST 0 0 8.00K 0.00K Flash FloodLori Drive just northeast of Bluewater Lake was washed out due to heavy rains.San Juan County1 SSE Farmington 01 1900MST2045MST 0 0 2.00M 0.00K Flash FloodSignificant flooding plagued the Farmington area during the evening hours of August 1st. More than 2.5 inches of rain fell in 3hours, but most of the rain fell in about a 30 minute time frame. Some of the hardest hit areas are described in the followingparagraphs.The Webb Chevrolet-Toyota dealership and neighboring businesses along East Main Street between Gila St. and Hannon Dr.was described as a swamp. Weeds and shrubs were wrapped around the tires of each truck as water, mud and debris floodedinto the lot. The force of the water moved one truck about six feet, and moved a nearby dumpster approximately 100 yards.Also in this area, a man whose car got stuck at the intersection of Cliffside Dr. and East Main got trapped in shallow, quickmoving water. The man was rescued by firefighters and was unharmed.Near the intersection of Largo St. and Railroad St., water was estimated to be 6 to 12 inches deep at the height of the event.Water damage was evident to at least two residences.An arroyo that crosses Hubbard St. near Peace Valley Road was flowing over the roadway. A high school senior attempted todrive through the waters, when her car was washed away. Her car traveled approximately 80 yards down the arroyo before shewas rescued. She was unharmed, but her car was destroyed. After the waters receded, it became evident that Peace ValleyRoad was partially eroded away beneath the pavement.Due to a holding pond that overflowed, five homes around the Country Club suffered significant damage, including onebasement that was completely filled with water. Most of these homes were filled with no less than 6 inches of water on theground level, resulting in damage of carpet, tile and other objects or furniture that was on the floor. Landscaping wascompletely eroded away, and fence lines were downed.A mudslide was also reported on County Road 3000 at mile marker 9.5. The road was impassible until the mud was cleanedoff the road.Aftermath of a flash flood in Farmington, NM. Photo by NWS Albuquerque.309

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW MEXICO, Central and NorthSan Juan County7 NNE Carson 01 1910MST2045MST 0 0 1.00K 0.00K Flash FloodAn arroyo washed over the roadway at intersection of Highway 550 and County Road 7150.An intense thunderstorm complex that developed southeast of the Farmington area shortly before 7 pm MST moved northwestinto the Four Corners region through 9 pm MST. Significant flash flooding was reported across Farmington and nearby areasas rainfall rates exceeded 2 inches per hour.Mckinley County2 E South Chaves 02 1300MST1430MST 0 0 50.00K 0.00K Flash FloodSouth Chavez Road and Woodview Drive in Baca as well as Navajo Road in Thoreau were washed out.Mckinley County2 SW Iyanbito 02 1645MST1745MST 0 0 20.00K 0.00K Flash FloodSweetwater, Iyanbito and Dakota Loop Roads were washed out due to flash flooding in Iyanbito for the second time in twodays.Mckinley County2 WNW Rehoboth 02 1709MST1830MST 0 0 120.00K 0.00K Flash FloodAfter the Church Rock bridge at Telstar Road collapsed July 31st, a temporary bridge was put in place. Just 2 days later,another bout of flash flooding resulted in the temporary bridge being washed out. A female flood victim had to be rescued thehigh waters in Church Rock. She sustained only minor injuries. Other vehicles were flooded out in Church Rock as well. Inaddition, mud as deep as 5 feet plagued Challenger Road again. Superman Canyon Road, Old Church Rock Coal Road, andBecenti Trail were also washed out for the 2nd time in as many days.Sandoval County1 NNE Jemez Spgs 02 2000MST2100MST 0 0 2.00K 0.00K Flash FloodFlash flooding resulted in mud and rocks, some as large as 10 inches in diameter, flowing across portions of Highway 4between Jemez Pueblo and Jemez Springs.Sandoval County8 NNE Jemez Spgs 02 2010MST2100MST 0 0 10.00K 0.00K Flash FloodThe La Cueva fire station flooded and Twisted Juniper Road was washed out.Deep moisture combined with an upper level wave sliding north across western New Mexico produced more torrential rainfalland repeat flooding for areas around Gallup and the Jemez Mountains.San Juan County3 SW Crystal 03 1600MST1730MST 0 0 0.00K 0.00K Flash FloodNavajo Route 134 was impassible due to high water at mile marker 22.Strong thunderstorms producing very heavy rainfall developed during the late afternoon hours across the Navajo Nation nearthe Arizona state line. The heavy rains led to flash flooding.Cibola County7 WNW Bluewater 05 1128MST 0 0 0.00K 0.00K Hail (0.88)310

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW MEXICO, Central and NorthCibola County1 S Mc Cartys 05 1400MST1530MST 0 0 50.00K 0.00K Flash FloodSeveral dirt and gravel roads were washed out completely along the northern periphery of the Acoma Indian Reservation andpoints just north of Acomita. Much of the damage occurred where arroyos crossed or neared the roadway. The greatest damageoccurred along Indian Service Roads 34, 345, 30 and 26 as well as Stock Yard Road. Water continued to spill over what wasleft of the roadways days later. Minor damage was also noted on the Wastewater Treatment Facilities property.NMZ518Santa Fe Metro Area05 1418MST 0 0 0.1K 0.00K Strong WindWidespread thunderstorms generally moved from west to east across the Land of Enchantment during the afternoon andevening hours. The stronger storms produced hail up to the size of nickels, heavy rain and wind gusts up to 50 mph. Curb deepwater was reported across many areas across the state, though more substantial flooding was noted around Acoma.Santa Fe County4 E Santa Cruz 15 1523MST1700MST 0 0 5.00K 0.00K Flash FloodHighway 76 was closed due to flash flooding in the vicinity of La Puebla, southeast of Espanola. Four to five feet of rock andsilt was washed over the road. Cars were washed into nearby arroyos.Over 1.5 inches of rain fell in 20 minutes southeast of Espanola. Cars were swept away due to the high waters.Chaves County4 NW Acme 16 0300MST0445MST 0 0 75.00K 0.00K Flash FloodNumerous road were closed or impassible in and near Roswell due to the heavy rains and flooding. This includes Poe Streetwest from Southeast Main as well as Brown Road from Country Club to Pine Lodge. Cars were also reported to have beenfloating down Highway 285 north of Roswell. Two feet of water ran over the highway between mile markers 136 and 138,leading the road to be closed. A couple of cars ended up in the ditch, with water up to their windshields. Also along PineLodge Road near mile marker 59, three to four feet of water ran over the road where it crossed Salt Creek. Cricket Creek aswell as Spring and Hondo Rivers were running bank full. Unofficial rainfall reports include near 5 inches near Berrendo Roadand North Main, 3.5 inches near the Roswell High School on West Church Street, and 3.0 inches at the 2600 block of SouthSunset. Hundreds of homes were without power.Early morning heavy rains in Roswell flooded many roads across the city on 16 August 2010. Poe Streetwas closed to travelers west from Southeast Main Street. Photo taken by Jim Tucker.311

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW MEXICO, Central and NorthRoosevelt County6 WNW Floyd6 S Elida16 0345MST0500MST 0 0 2.00K 0.00K Flash FloodMultiple roads were flooded across northern Roosevelt County, particularly around Floyd and Portales. One citizen attemptedto drive through a low water crossing filled with three to four feet of water along Highway 267 near Floyd. The car stalled, butwas recovered. 18th Street in Portales was a particularly hard hit area. Streets along 18th were impassible between Avenue Dand Globe. The intersection of Avenue I and 18th Street was impassible as well. The cooperative observer in Portalesmeasured 1.75 inches of rain.A large complex of showers and thunderstorms slowly moved eastward across the eastern plains of New Mexico during theearly morning hours of the 16th. Rainfall amounts around 2 inches were common, with isolated areas receiving up to 5 inches.The flooding closed many roadways around Roswell and Portales.Lincoln CountyTinnie 23 1152MST1158MST 0 0 0.00K 0.00K Hail (1.00)Mckinley County6 NW Mentmore 23 1245MST1345MST 0 0 40.00K 0.00K Flash FloodCounty Road 1 was impassible as water was quickly running over the road and lapping up along the Tse Bonito bridge.Though the bridge remains standing, the water tore off both sides of the bridge.Sandoval County2 W Rio Rancho 23 1845MST1930MST 0 0 20.00K 0.00K Flash FloodNearly 2 inches of rain fell across portions of northwest Rio Rancho. The intersection of Northern and Idalia was closed due toflash flooding. Along Unser, though the road was not closed, it was impassible to several cars which got stuck in the highwaters. A sewer line was also damaged, which allowed sewage to flow into the Montoya's Arroyo.Quay County3 NW Quay 2829NEW MEXICO, South Central and SouthwestAs an upper level trough crossed the northern Rocky Mountains, moisture surged northward across New Mexico. Initially, asevere storm with hail and very heavy rain formed over the Sacramento Mountains. Then, while the associated cold frontmoved down the eastern plains, a few prolific lightning producing storms impacted the Rio Grande Valley with heavy rain andhail.2315MST0045MST 0 0 0.00K 0.00K Flash FloodA low water crossing along Quay Road 49 flooded out due to the heavy rains. This area only received about an inch of rain,however, areas upstream received nearly 4 inches, resulting in high water in all area creeks and streams.As a line of showers and thunderstorms moved east into more moisture, they increased in intensity and began to train over eachother. Portions of southwest Quay County received nearly 4 inches of rain, which made the creeks run high. A low watercrossing was flooded out just north of Quay.Grant County6 SSW Silver City Meown Ar 01 1200MST1500MST 0 0 0.00K 0.00K Flash FloodThe Silver City Sun-News reported heavy rains caused significant damage to a section of Forest Road 150 at Rocky Canyon inthe Gila National Forest. The Rocky Canyon Campground was inaccessible due to downed logs, debris and large ruts blockingthe campground entrance.South-southwesterly flow ahead of a weak low over Baja brought deep moisture and lift into the region. The thunderstorms thatdeveloped were slow moving and produced very heavy rain.Dona Ana County2 ENE (LRU)Las Cruces Arpt 12 1730MST1740MST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Wind gusts were estimated up to 65 MPH in northeast Las Cruces.312

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW MEXICO, South Central and SouthwestA weak disturbance moving through west-southwest flow aloft provided lift for thunderstorms over Dona Ana County. Dewpoints in the 40s at the surface combined with temperatures in the 90s allowed for severe winds to be produced with thesestorms. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hidalgo County2 S Animas 15 1955MST2005MST 0 0 0.00K 0.00K Hail (0.88)Pea to nickel sized hail covered the ground.A surface trough extended from Northwestern Mexico through Southwest New Mexico and provided enough lift forthunderstorms over Hidalgo County.Otero County5 SSE Cloudcroft5 W Mayhill23 1220MST1500MST 0 0 0.00K 0.00K Flash FloodStorm drainage culverts on Highway 130 near mile marker 16 were plugged and 2 feet of water was flowing over the highway.The highway was impassable.Moist easterly upslope flow with an upper level ridge centered over area allowed for slow moving thunderstorms to producevery heavy rains over the Sacramento Mountains.Dona Ana County1 NE Leasburg 24 1330MST1430MST 0 0 0.00K 0.00K Heavy RainNEW YORK, CentralRainfall totals of up to 2.00 inches were reported in Radium Springs with several inches of standing water on streets and lowlying areas.An upper ridge was centered over the Four Corners area with deep easterly flow across Southern New Mexico allowing forheavy rains to develop over the region.Cayuga County1 NNW Union Spgs 16 0530EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)There was roof damage to a home in Aurelius Township. A small trailer was also flipped over, and several trees were blowndown.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cayuga CountyOwasco 16 0532EST 0 0 0.00K 0.00K Hail (0.75)Onondaga CountyKirkville 16 0610EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down in Kirkville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison County1 E Canastota 16 0620EST 0 0 0.00K 0.00K Hail (0.88)Madison County1 NE Rippleton 16 0620EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down in Cazenovia and Sullivan Township.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Oneida CountyVerona 16 0645EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down in Verona.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.313

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, CentralOneida CountySauquoit 16 0655EST 0 0 0.00K 0.00K Hail (1.00)Oneida County1 SE Clayville 16 0655EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down from Clinton through Clayville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chenango CountyNorwich 16 1017EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and wires were blown down, with power outages from Norwich to Oxford.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Otsego CountyMaryland 16 1100EST 0 0 0.00K 0.00K Hail (0.75)Otsego CountyOneonta 16 1105EST 0 0 0.00K 0.00K Hail (0.88)Otsego CountyOneonta 16 1105EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were blown down around Oneonta.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Delaware County1 W West Davenport 16 1115EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)High winds tore the roof off a local gun shop on Route 23.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Sullivan County1 E Monticello 16 1255EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were blown down in Hortonville, Callicoon, Jeffersonville, Monticello and Rock Hill.Showers and thunderstorms developed out ahead of a cold front as it moved through the eastern Great Lakes region. Stormsdeveloped early in the morning and produced both large hail and damaging winds. As the front pushed through New York andPennsylvania during the day, the thunderstorms tapered off by mid afternoon. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.Onondaga CountyTully 22 1545EST 0 0 0.00K 0.00K Heavy RainOneida County1 S Dunn Brook1 W Stokes CornerA spotter measured 3.22 inches of rain.22 1915EST2200EST 0 0 0.00K 0.00K FloodWater flowed over the road near a bridge on State Route 46 between Dunn Brook and Hillside.Oneida CountyLeeWesternville23 0030EST0330EST 0 0 0.00K 0.00K FloodHigh water, at least one foot deep, was reported on several roads. Portions of Lee Center and Stokes Road and State Route 69were closed.An area of low pressure tracked slowly east across New York during the day, with rain and areas of embedded heavy showersassociated with the system pushing north through upstate New York. Rainfall totals of 2 to nearly 3.5 inches caused someflooding problems in Onondaga and Oneida counties in north-central New York.314

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, CoastalNYZ081Southeast Suffolk08 1500EST 1 1 0.00K 0.00K Rip CurrentA long and persistent southerly fetch around Bermuda high pressure generated long period southerly swells. The combinedsoutherly winds and swells created dangerous rip currents at the Atlantic facing beaches of Long Island on August 8th. F37OUNYZ076Queens22 1615EST 0 0 10.0K Strong WindA developing coastal storm off of Long Island created strong winds and heavy rains, which were sufficient to bring down largebranches and power lines in Queens.Orange County1 S Highland Falls 22 1740EST 0 0 0.00K 0.00K Heavy RainA car traveling on Route 9W in Highland Falls hydroplaned from the heavy rain, spun off the road, hit a rock and then hit theguard rail. A passenger in the back seat, who was pregnant, was ejected from the vehicle and pronounced dead at CornwallHospital. Two other passengers also sustained minor injuries. A Cocorahs observer in Cold Spring, 4 miles NE of the accidentin Putnam County, reported 5.29 inches of total rainfall.Nassau County1 E Rockville Centre 22 2030EST2105EST 0 0 0.00K 0.00K Flash FloodA car became stuck in high flood waters at the intersection of North Main St. and Stevens St. in Freeport. The local firedepartment responded to rescue the three occupants of the vehicle.Nassau County1 ESE Rockville Centre 22232050EST2105EST 0 0 20.00K 0.00K Flash FloodSeveral homes on Independence Ave. in Freeport had significant amounts of water in their basements. One home hadapproximately 4 ft. of water damaging the oil burner and electric. Damage amounts are estimated.Nassau County1 E Bellerose 22 2100EST2232EST 0 0 0.00K 0.00K Flash FloodTwo to three feet of water accumulated at the intersection of Floral Blvd. and Daisy Ave. in Floral Park, making the roadimpassable. A Skywarn Spotter in Floral Park reported 3.82 inches of total rainfall.Nassau County1 S Greenvale1 ENE Roslyn Estates22 2120EST2232EST 0 0 100.00K 0.00K Flash FloodAll lanes were closed in both directions on Interstate 495 in Roslyn Heights from Searingtown Rd. to Glen Cove Rd. withmotorists being rescued from high water by the local fire department. In the Herricks section of New Hyde Park, torrential raincaused severe flooding on Allen Street. Four to five feet of water accumulated on parts of the street causing a foundation wallof one house to collapse, rupturing the gas main. Approximately 30 homes had to be evacuated as a result of this. Three homeson Allen St. were condemned as unsafe to inhabit due to cracks or partial collapse of their foundation walls. Property damageamounts are estimated.Queens County1 NNW Rosedale1 S Cambria Hgts22 2125EST2232EST 0 0 0.00K 0.00K Flash FloodSeveral vehicles became stuck in flood waters with occupants rescued by the local fire department on 147th Ave., 225 St. and144th Ave. in Brookville.Queens County1 ESE Queens Vlg1 N Rosedale22 2130EST2132EST 0 0 30.00K 0.00K Flash Flood315

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, CoastalIn Springfield Gardens, Springfield Blvd. became impassable due to flood waters. A bus became submerged in high water onSpringfield Blvd. near 140th St. and its occupants were rescued by the local fire department. Water accumulated under theunderpasses on the Belt Parkway, causing the road to be closed in both directions. Multiple people were trapped in vehicles,which local fire departments responded to in addition to flooding of many residential homes. A resident on Edgewood Ave.needed assistance escaping the deluge of water entering her basement apartment.Nassau County1 N Roosevelt 22 2215EST2232EST 0 0 0.00K 0.00K Flash FloodA vehicle became stuck in flood waters and the occupant was rescued by the local fire department on Long Beach Rd. at theSouthern State underpass in South Hempstead.Nassau County1 NNW Baldwin 22 2217EST2232EST 0 0 0.00K 0.00K Flash FloodA vehicle became stuck in flood waters on Long Beach Rd. between Sunrise Hwy. and Merrick Rd. in Rockville Centre. Theoccupant of the vehicle was rescued by the local fire department.A warm front extending through the Tri-State Area from a low pressure system moving across the northern Mid-Atlantic Statesacted as the focus for heavy rain and training thunderstorms in Queens and Nassau Counties. Slow moving showers withembedded thunderstorms produced heavy rain which led to flash flooding on Long Island. In addition, a woman driving inOrange County lost control of her car in a heavy shower, killing both herself and her unborn child.NEW YORK, EastMontgomery County1 W Auriesville 03 1522EST1524EST 0.21 50 0 0 0.00K 0.00K Tornado (EF1)A tornado briefly touched down near Fonda with damage confined to snapped and uprooted trees. Maximum estimated windspeed were 90 mph.Montgomery County1 ESE Auriesville 03 1529EST1531EST 0.2 75 0 0 0.00K 0.00K Tornado (EF1)A tornado briefly touched down mainly on the grounds of the Auriesville Shrine, with damage confined mostly to snapped anduprooted trees. Maximum estimated wind were 100 mph.An upper level disturbance moved across the region Tuesday, August 3rd, triggering a severe thunderstorm over MontgomeryCounty which produced brief touchdowns of a tornado near Fonda and Auriesville.Herkimer County1 NW Cedar Lake 16 0703EST0708EST 0 0 0.00K 0.00K Hail (0.75)Penny size hail was reported during a thunderstorm in Cedar Lake. Hail completely covered the ground.Herkimer County1 W Cedarville 16 0706EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Two trees were reported down in Cedarville due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Herkimer County1 SW Mohawk 16 0712EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down in Mohawk due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.316

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, EastAlbany CountySouth Westerlo 16 1215EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Large trees were reported downed and a power pole snapped near the intersection of County Road 405 and County Road 403 inSouth Westerlo due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greene County1 W Medway 16 1230EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)A tree and wires were reported down on a house in Medway due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greene County1 SSE West Coxsackie 16 1234EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Wires were reported down in Coxsackie due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greene County1 ESE New Baltimore 16 1237EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees and wires were reported down in New Baltimore due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Columbia County2 N Poolsburg 16 1239EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down on wires at the intersection of Route 9J and Ridge Road, approximately 2 miles south of SchodackLanding due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Columbia County1 NNW North Chatham 16 1242EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A large tree and wires were reported down across Bunker Hill Road in North Chatham due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Columbia County1 SW North Chatham 16 1245EST1248EST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)An estimated wind gust of 65 mph was reported by a storm chaser during a thunderstorm in Niverville. Also, a tree wasreported down on wires.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Columbia County1 ENE Chatham Center 16 1248EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Power lines were reported down near Route 13 in Chatham due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Columbia CountyState Line 16 1300EST1305EST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail was reported during a thunderstorm approximately 3 miles northeast of Austerlitz.Columbia County1 WNW Flatbrook 16 1302EST1307EST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail was reported during a thunderstorm in Canaan Center. Visibility was reported to be zero during the hail.317

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, EastColumbia County1 SSW Lebanon Spgs 16 1302EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down across Route 22 in New Lebanon due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ulster CountyPlattekill 16 1359EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Numerous trees and wires were reported down in Plattekill due to strong thunderstorm winds.Dutchess County1 NE Rudco1 NW NoxonNote: The estimated wind gust of 50 knots is equivalent to 58 mph.16 1406EST1416EST 0 0 0.00K 0.00K Thunderstorm Wind (87EG)NWS Storm Survey observed numerous trees down southeast of Poughkeepsie from near the Route 9 and Spackenkill Roadintersection eastward for 5 miles. Most of the damage was from the Route 9 and Spackenkill Road intersection eastward for onemile. East of there, damage was spotty and extended as far east as Old Smith Road. Maximum wind speeds based on treedamage were estimated at 100 mph.Severe thunderstorms developed mainly during the early to mid afternoon hours ahead of an approaching cold front and upperlevel disturbance on Monday, August 16th. A series of microbursts occurred south of Poughkeepsie. Note: The estimated windgust of 87 knots is equivalent to 100 mph.Schoharie County2 WNW Sloansville 19 1627EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Trees and wires were reported down in the Towns of Carlisle and Esperance due to strong thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Schoharie County1 N Sloansville 19 1627EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Numerous large trees were reported down and uprooted along Route 30A near the intersection of Route 20 in Sloansville due tostrong thunderstorn winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Albany County2 E North Bethlehem 19 1720EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree was reported down on Avon Place in Albany due to strong thunderstorm winds.A couple of severe thunderstorms occurred during the late afternoon hours of Thursday, August 19th ahead of an approachingcold front and upper level disturbance. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Herkimer County2 ENE Jacksonburg 22231704EST1730EST 0 0 0.00K 0.00K FloodFlooding was reported in Little Falls on Route 5 near Gun Club Road and on Route 5S near Lower Paradise Road.Herkimer County2 ESE Little Falls2 SW Manheim Center22231754EST1730EST 0 0 0.00K 0.00K FloodFlooding was reported on Fincks Basin Road off Route 169 in Little Falls.Herkimer County1 E Bolgeville1 SSE Dolgeville22231755EST1730EST 0 0 50.00K 0.00K Flood318

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, EastNumerous roads were reported closed due to flooding in the vicinity of Dolgeville along with basement flooding. South MainStreet was flooded in Dolgeville. In addition, a mudslide was reported in Danube.Herkimer County9 E Starkville 22 1815EST2300EST 0 0 0.00K 0.00K FloodStanding water was reported on the New York State Thruway, Interstate 90, between Exits 29 and 29A.Montgomery CountyFt Plain 22231959EST1730EST 0 0 0.00K 0.00K FloodThe Otsquago Creek overflowed its banks and flooded portions of the Village of Fort Plain. Route 80 was closed due toflooding with 3 feet water on it. Some streets in the village had up to 5 feet of water on them. Nearly 60 homes near the creekwere evacuated for the night. Severe erosion occurred along the creek bank. A state of emergency was declared in Fort Plain.Montgomery County24 ESE Cranesville2 NW Ft Johnson23270230EST1500EST 0 0 0.00K 0.00K FloodThe Erie Canal was shut down due to high water and debris in the water along its length from Lock 2 (Waterford, NY) to Lock21 (Rome, NY).Montgomery County1 S Canajoharie 23 0700EST1500EST 0 0 0.00K 0.00K FloodBasement flooding was reported in the Village of Canajoharie.A slow moving low pressure system tracked eastward across the southern tier of New York State and northern PennsylvaniaSunday, August 22nd, during the afternoon and evening hours and passed south of Long Island Sunday night.Six to 8 inches of rain occurred in a concentrated area over western Montgomery, southeast Herkimer and far western Fultoncounties, resulting in flooding.A dam failed in West Winfield on the Unadilla River in southern Herkimer County near the Otsego County line. However, thisdam failure did not cause any flooding but estimates for repairing the dam are approximately $200,000.NEW YORK, NorthClinton County3 W West Chazy 02 1340EST1345EST 0 0 0.00K 0.00K Hail (1.25)Two reports of half dollar size hail on Atwood Road.Clinton County2 N West Chazy 02 1340EST 0 0 20.00K 0.00K Thunderstorm Wind (55EG)Numerous trees down, including several 5-6 feet in diameter at the base.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Clinton County1 WSW Spellmans 02 1345EST1355EST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail fell for approximately 10 minutes along Route 22 in East Beekmantown.319

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, NorthClinton County2 SSW West Chazy 02 1345EST1350EST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail reported on O'Neill road.Clinton CountyWest Chazy 02 1345EST1355EST 0 0 0.00K 0.00K Hail (1.00)One inch diameter hail lasted approximately 10 minutes.Clinton County1 E East Beekmantown 02 1350EST1355EST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail on Colby road.Essex CountyWillsboro 02 1500EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Several trees up to half foot in diameter downed by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Essex County2 NNW Towers Forge 02 1505EST 0 0 75.00K 0.00K Thunderstorm Wind (60EG)Several trees down across the town of Lewis as well as a large swath of trees just north of Exit 32 on the southbound lane ofInterstate 87 that closed the highway for several hours. Damages in Lewis/Stowersville were to trees, a few vehicles, roofs fromfallen trees and a few sheds.The combination of a warm and unstable air mass with temperatures in the 80s and dew points in the 60s to lower 70s alongwith a weak surface boundary and a mid-atmospheric disturbance accounted for scattered thunderstorms during the afternoonof August 2nd across the northern Champlain Valley of New York.Some of these storms produced damaging winds as well as large hail up to an half dollar diameter in size. In particular, alocalized wet microburst downed dozens of trees and forced the closure of Interstate 87 near Exit 32. Note: The estimated windgust of 60 knots is equivalent to 69 mph.Clinton County2 W Harrigan Corners3 NW Merrill04 0220EST0900EST 0 0 500.00K 0.00K Flash FloodTwo day rainfall totals in excess of 5 inches, ending the morning of August 4th, fell over steep terrain of the northern slopes ofthe Adirondacks on Ellenburg Mountain and Spruce Hill. Numerous roads were covered by rushing water and madeimpassable. In addition, there was widespread damage to road surfaces in the towns of Ellenburg and Altona. One home wasflooded when debris moving down a stream bed caught on a small bridge, which created a dam that diverted the flow.Clinton County1 WNW Ellenburg1 ESE Ellenburg Depot04 0430EST0945EST 0 0 250.00K 0.00K FloodTwo day rainfall totals in excess of 5 inches fell in the North Branch of the Great Chazy River basin, thus water levelsexceeded the river banks and flooded businesses and camping areas in Ellenburg NY. A motel and general store, as well as twoseasonal RV parks were flooded. In one RV park near Ellenburg, 3 people were trapped in flood waters and required rescue.The flash flooding and flooding that occurred during the morning of August 4th was the result of two rounds of heavy rainfall.The first heavy rainfall event occurred during the afternoon and evening hours of August 2nd, with another bout of heavyrainfall that occurred during the night of August 3rd. Over 5 inches of rain fell over the two day period that resulted in floodingduring the early morning hours of August 4th along the north slopes of the Adirondacks in the North Branch of the Great Chazydrainage basin in Clinton County.St. Lawrence County1 SE Ogdensburg 04 1515EST 0 0 50.00K 0.00K Thunderstorm Wind (50EG)Multiple full grown maple trees uprooted with damage to vehicles and some small structures on Elizabeth, Hamilton, Caroline,Franklin, State, Morris and Washington streets.320

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, NorthFranklin County8 NNE St Regis FallsDickinsonA cold front in Ontario province approached the St. Lawrence River Valley during the afternoon of August 4th. A thunderstormcomplex in southeast Ontario approached the St. Lawrence River Valley during the mid to late afternoon hours and thenquickly diminished as it entered St. Lawrence county. New York. However, a leading edge gust front did cross the St.Lawrence River and produced isolated wind damage in Ogdensburg. Note: The estimated wind gust of 50 knots is equivalentto 58 mph.22232300EST0800EST 0 0 60.00K 0.00K FloodA reported seven inches of rain flooded roads and some buildings in and around St. Regis Falls NY. Local dirt roads sustainedwashouts and had to be repaired. In the hamlet of St. Regis Falls, a building housing the Waverly town office and a medicalclinic was flooded by four to six inches of water, and water flooded St. Regis Falls Volunteer Fire and Rescue Department.St. Lawrence County2 NE Stockholm Center 22232300EST1000EST 0 0 40.00K 0.00K FloodNumerous roads were closed in Stockholm, Potsdam, Norwood, and Ogdensburg New York. The worst damage was on CountyRte 47 in Stockholm, between State Routes 11 and 11B, where the road side and guard rail was washed away.A slow moving low pressure system moved from the eastern Great Lakes region across southern New York on the 22nd and23rd, and interacted with very moist air across the portions of St. Lawrence and Franklin counties. Widespread moderate toheavy rainfall developed by midday on the 22nd, and continued through the afternoon and evening. Widespread rainfall of 2 to4 inches with localized 4 to 7 inches of rainfall caused flooding the night of August 22nd into the morning of the 23rd.NEW YORK, WestNiagara County1 NE Martinsville 16 0002EST 0 0 10.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Genesee County1 S Indian Falls 16 0036EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)The Genesee County Sheriff reported trees down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Livingston County1 NE Lima 16 0335EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)The Livingston County emergency manager reported trees and wires down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ontario County1 W Victor 16 0347EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)The Ontario County Sheriff reported trees and wires down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ontario County1 W North Farmington 16 0355EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)The Ontario County Sheriff reported trees and wires down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ontario County1 NE Phelps 16 0450EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)The Ontario County Sheriff reported trees and wires down.A cold front crossed the region during the early overnight hours. The front was accompanied by strong thunderstorms thatproduced winds gusting to 60 mph. The strong winds downed trees and power lines. Power outages were reported in Victor,Farmington and Phelps. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.321

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NEW YORK, WestMonroe County1 WNW Crescent Beach 19 1500EST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)A public call reported several trees down at Long Pond Shores apartment complex.Thunderstorms developed ahead of an approaching cold front during the late afternoon hours. In Monroe County, thethunderstorms produced strong winds that downed trees and power lines. At the Long Pond Shores apartment complex inGreece, a large tree fell on part of the building. Fallen limbs were scattered along Lakeshore Road in Irondequoit. ElectricUtilities reported about 150 homes without power in Irondequoit and Webster. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.Lewis County1 SW Houseville 23 0100EST0600EST 0 0 30.00K 0.00K FloodLewis County4 E Natural Bridge 23 0100EST0600EST 0 0 25.00K 0.00K FloodA large area of rain showers and embedded thunderstorms brought heavy rains to areas of the Tug Hill Plateau during the lateafternoon and evening hours of Sunday the 22nd. Volunteer observers reported rainfall totals of four to five inches. In additionto road closures due to ponding, some road damage did occur. In Turin, the Lewis County sheriff reported that Carpenter Roadhad been washed out and minor flooding closed the intersection of Route 26 and Carpenter Road. In Croghan, a bridge waswashed out on Tidd Road. There were reports of basement flooding in Lowville.NORTH CAROLINA, CentralAlamance County2 NW Swepsonville1 S Mebane05 1415EST1433EST 0 0 30.00K 0.00K Thunderstorm Wind (50EG)Davidson County1 N Reedy Creek3 N ThomasvilleNumerous trees down on a swatch extending from Graham to Mebane. The damage was most extensive in Mebane where downtrees caused damage to two vehicles and two homes.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1545EST1615EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Several trees and power lines were blown down along a swath from Highway 150 near Arcadia to Hasty School Road nearThomasville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Forsyth County2 ESE Union Cross 05 1605EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Person CountyRoseville1 NNE CavelA tree was blown down on Watkins Ford Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1620EST1635EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Multiple trees were blown down along a swath extending from Burlington Road to Chub Lake Road. One tree fell onto thefront porch of a house and a truck near Chub Lake Road. Monetary damages were estimated.Guilford CountyHill Top1 NNE Hamilton LakesNote: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1630EST1637EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down along the swath.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.322

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, CentralAlamance CountyMebane 05 1700EST1705EST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down in Mebane. One tree blew over onto a carport causing damage to several vehicles. Monetarydamage values were estimated.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Orange County3 W Schley 05 1730EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down at NC Highway 86 and Walnut Grove Church Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Durham County2 SW Fairntosh 05 1740EST 0 0 3.00K 0.00K LightningLightning blew a transformer on Snow Hill Road near Whispering Meadow Lane.Durham County1 S West Durham 05 1741EST1742EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A couple of trees were blown down along Chapel Hill Road and Chapel Hill Street near Willard Street.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Halifax County1 N Halifax Co Arpt 05 1817EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A couple of trees were blown down near the intersection of NC Highway 158 and Zoo Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wake County1 WNW Caraleigh 05 1825EST1832EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down at the intersection of Gorman Street and Thistledown Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wake County1 SW Wilders Grove 05 1834EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree was blown down at the intersection of Milburnie Road and Shanta Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wake County2 SSE Leesville 05 2000EST2044EST 0 0 0.00K 0.00K Flash FloodHeavy thunderstorm rains forced the closing of eastbound Glenwood Avenue due to street flooding.Strong instability and steep low-level lapse rates allowed scattered convection to initially develop along the lee side surfacetrough during the early afternoon. An outflow driven convective band then developed downstream of the initial convection andmoved east across the area. The severe storms produced widespread thunderstorm wind damage and excessive cloud to groundlightning.Guilford County2 SSW Greensboro Arpt2 N Battle Ground11 2045EST2059EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Two trees were uprooted on Gallimore Dairy Road. Also, two trees were snapped off about half way up the trees north of thecity of Greensboro.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.323

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, CentralForsyth CountyKernersville 11 2055EST2325EST 0 0 0.00K 0.00K Flash FloodFlash flooding resulted in road closures at the intersection of Highway 66 and Business 40, the intersection of Piney GroveRoad and North Main Street and portions of East Mountain Street.Guilford County1 ENE Deep River 11 2145EST 0 0 15.00K 0.00K LightningA home on Windstream Court in High Point sustained roof damage due to a lightning strike. The damages were estimated.Davidson CountyThomasville3 SE Lambeth11 2154EST2203EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Multiple trees were blown down on Mock Street in downtown Thomasville. Also, multiple trees were blown down on BuieBodenheimer Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Guilford County2 S Bessemer 11 2200EST 0 0 0.40K 0.00K LightningA lightning strike damaged an outbuilding at 3865 Arbor Drive in Greensboro. The damage was estimated at $300 and thecontent loss was $100.Franklin County3 SSE Youngsville 11 2223EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Guilford County1 NNW Greensboro 1112A couple of trees were blown down along Highway 96 just north of the Wake County border.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.2229EST0125EST 0 0 0.00K 0.00K Flash FloodThe Guilford County 911 Center reported that numerous roads were closed throughout the city of Greensboro.Scattered severe thunderstorms developed as weak surface forcing associated with a lee side trough combined with a veryunstable air mass. Isolated flash flooding was observed across the Triad as slow moving thunderstorms occurred in anextremely moist air mass.Alamance County1 ENE Graham 18 0000EST 0 0 7.00K 0.00K LightningA mobile home was declared a total lose when Lightning came in through the dryer and sparked a fire.Sampson County2 SSW Moultonville 18 2105EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Power-lines were blown down on Rowan Road.Strong afternoon heating in a moisten-laden airmass fueled scattered convection. The training storms produced locally heavyrainfall of four to six inches in localized spots but there was no report of flash flooding. One of the stronger storms producedisolated thunderstorm wind damage. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Davidson County1 SSE Newsom 19 1807EST2200EST 0 0 0.00K 0.00K Flash FloodHeavy rainfall of 4 to 6 inches flooded North Carolina Highway 49 and 8 making the highway impassable. One automobile wasstranded in the flood waters. Tuckertown Bridge was also completely flooded.324

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, CentralMontgomery County3 E Tuckertown1 S Moratock19201854EST0000EST 0 0 0.00K 0.00K Flash FloodSeveral roads across Montgomery County were closed due to flash flooding from heavy rainfall of four to six inches. Amongth3 list of roads include Blaine Road, River Road and Pinehaven Drive near Eldorado, and South Main Street and HunsuckerRoad near Biscoe.Stanly CountyRichfield2 WSW Albemarle Arpt19 1930EST2155EST 0 0 25.00K 0.00K Flash FloodHeavy rainfall of four to six inches resulted in widespread flooding along highways 49 and 52 in Stanly County. As a result ofthe heavy rains, several businesses in Richfield were flooded. Pfeiffer University also reported flooding of several buildings oncampus. The Richfield-Misenheimer Fire Department was dispatched for a flooded road and people standing on the top ofstranded vehicles, while another woman had to be rescued from her car on Gold Branch Road. Property damages wereestimated.Stanly County2 ESE Albemarle 19 1930EST 0 0 40.00K 0.00K LightningA lightning strike caused a house fire in Albemarle. Fire fighters was able to contain the fire to the attic.Anson County1 SSE Ansonville3 E Anson Co Arpt19202042EST0000EST 0 0 0.00K 0.00K Flash FloodHeavy rainfall of 4 to 6 inches resulted in flooding across much of southern Anson County. Several roads were closed and onefire truck was stranded on Highway 52 near Plank Road.Moore CountyCarthage 19 2054EST 0 0 400.00K 0.00K LightningA Carthage home was completely destroyed when lightning hit a tree right behind the house and branched off into the home.A series of mid-level trough and upper level disturbances moved across central North Carolina as a moisten laden airmassremained in place. With several locations having received heavy rainfall earlier in the week, additional rainfall of 3 to 6 inchesproduced flash flooding over the Southwest Piedmont.Wake County2 SW Purnell 23 1615EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Multiple trees were blown down near and on the Hasentree Golf Course in Wake Forest.A stalled frontal boundary provided enough surface convergence for the development of scattered strong storms and an isolatedsevere storm during peak heating. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wake County2 NE Caraleigh2 N Echo Hgts24 0630EST0800EST 0 0 0.00K 0.00K Flash FloodHeavy rainfall of 3 to 5 inches flooded several streets in the Raleigh area. Law enforcement reported that vehicle was stalled in2 feet of flowing water over South Saunders Street at Interstate 40. Law enforcement was forced to close several sections ofNC Highway 50 due to high flood waters.Johnston County2 ESE Clayton 24 0815EST1050EST 0 0 0.00K 0.00K Flash FloodHeavy rainfall of 4 to 5 inches forced law enforcement to close several roads in the vicinity of Highway 70 and 42.Multiple shortwave troughs rotating around an upper level low over Virginia resulted in heavy rainfall of 3 to 5 inches over theTriangle as slow moving showers and isolated thunderstorms persisted through the overnight and morning hours on the 24th.325

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, CentralEdgecombe County3 WNW Speed2 N Tarboro27 1448EST1500EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A couple of trees were blown near the city of Speed on Cutchin Farm Road near Kilquick Road. Also, a couple of trees wereblown down near the city of Tarboro on Baker Street near East Northern Boulevard.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Edgecombe County1 SE Whitakers 27 1533EST 0 0 0.00K 0.00K Hail (1.00)NORTH CAROLINA, Central CoastalQuarter size hail was reported near the city of Whitakers by the local fire department.A weak surface front combined with strong diurnal heating and resulted in scattered strong to severe pulse convection acrossthe northeastern coastal plain.NCZ081Western Hyde07 1430EST 1 0 0.00K 0.00K Rip CurrentA man drowned near Ocracoke Inlet after a rip current pulled him out to sea. M51IWCraven County4 NW Caton 12 2245EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Strong winds blew down several trees between Cayton and Vanceboro.Scattered thunderstorms developed during the late evening as a cold front dropped south into the area. One storm becamesevere and produced damaging winds in Craven County. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Beaufort County2 E Wharton 18 1610EST 0 0 0.00K 0.00K Hail (1.00)Scattered to numerous thunderstorms developed over the region ahead of a slow moving cold front. One storm produced largehail in Beaufort County.Onslow CountyErvintown 22 1900EST 0 0 0.50K 0.00K LightningShed struck by lightning and burned down.Scattered thunderstorms developed along a stalled front during the afternoon and evening. One storm produced a lightningstrike that burned down a shed in Onslow County.NCZ095Carteret24 1450EST 1 0 0.00K 0.00K Rip CurrentA man drowned near Emerald Isle after a rip current pulled him out to sea. M48IWCraven County2 SSW Askin 27 1520EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Strong winds blew down a tree across Highway 43 near Little Swift Creek bridge.Scattered thunderstorms developed during the afternoon along a weak boundary as an upper level disturbance crossed. One ofthe storms became severe producing damaging winds in Craven County. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.326

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, Extreme SouthwestClay CountyWarne 13 1725EST1730EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Law enforcement personnel reported several large limbs downed by thunderstorm winds on old Highway 64 near Warne.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cherokee County2 W Murphy 13 1846EST1855EST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)NORTH CAROLINA, North CoastalLaw enforcement personnel reported numerous trees downed by thunderstorm winds across the western half of the county.A boundary across the region triggered isolated severe thunderstorm during the evening hours. The storm reports comprised ofdamaging thunderstorm winds. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Hertford County2 ENE Menola 12 1515EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed on Flea Hill Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bertie County1 W Merry Hill 12 1608EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)NORTH CAROLINA, Northwest and North CentralTrees were downed.Scattered severe thunderstorms associated with a cold front produced damaging winds across portions of northeast NorthCarolina. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wilkes County1 SSE Champion 05 1241EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was brought down by high winds on Rest Home Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wilkes County3 NW Boomer 05 1250EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wilkes County1 SE Champion 05 1313EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Numerous trees and power lines were brought down or damaged by the high winds.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Wilkes County4 SSW Hunting Creek 05 1332EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Numerous large tree limbs were down on Hendren Road and nickel-sized hail fell.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Surry County2 NNE Dobson 05 1400EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down by thunderstorm winds on Red Brush Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.327

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, Northwest and North CentralSurry County4 SSE Low Gap 05 1400EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Some large tree branches and trees were down in the area of Blevins Store Road and Ladonia Church Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Surry County1 ENE Mt Airy 05 1414EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A few trees were knocked down on Linville Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Surry County1 NW Flat Rock 05 1415EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were brought down on East Pine Street near Flat Rock.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County2 SW Francisco 05 1440EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported down on Jackson Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County1 NNW Moores Spgs 05 1442EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown down onto Vineyard Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County1 SSE Francisco 05 1442EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree reported down at Smith and Horseshoe Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County3 S Harts Store 05 1446EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County2 SW Harts Store 05 1449EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported down at the intersection of Route 89 and George Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County2 S Harts Store 05 1451EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Ray Loop Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockingham CountyMayodan 05 1516EST 0 0 7.50K 0.00K Thunderstorm Wind (50EG)A tree blown onto a power line started a house fire.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Watauga CountyBlowing Rock 05 1520EST1620EST 0 0 0.00K 0.00K Flash FloodMore than six inches of water was flowing across Highway 321.328

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, Northwest and North CentralCaswell CountyQuick 05 1546EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several large trees were down in Ruffin and damaged some house gutters.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caswell County1 N Pelham 05 1551EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)A tree fell on a car near Pelham.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caswell County1 SSW Yarbro 05 1551EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were brought down on Gaddy Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caswell County1 WNW Yanceyville Arpt 05 1553EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)A tree was blown onto a trailer on Hodges Dairy Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wilkes County1 NE Darby 05 1600EST1700EST 0 0 0.00K 0.00K Flash FloodPortions of Wagon Ridge road and Homestead Road were under more than 6 inches of rapidly flowing water from a tributary ofElk Creek being out of its banks.Caswell County1 W Yanceyville 05 1601EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was down on Court Square.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County1 NE Moores Spgs 05 1618EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down in the 1500 block of Route 66.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County2 NNE Vade Mecum 05 1620EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported down due to high winds at the intersection of Lynchburg Road and Frye Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County3 SSW Lawsonville 05 1623EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were brought down on Highway 89 and Clyde Amos Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Stokes County1 E Vade Mecum 05 1625EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)High winds brought several trees down.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Stokes County1 N Hartman 05 1628EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)High winds brought down some trees on Pleasant View Church Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.329

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, Northwest and North CentralWatauga County2 SE Valle Crucis 05 1700EST1800EST 0 0 0.00K 0.00K Flash FloodThe Watagua River came out of its banks and caused over six inches of water to flow over New Farm Road.Watauga County2 SSE Valle Crucis 05 1700EST1800EST 0 0 0.00K 0.00K Flash FloodThe Watauga River flooded several small roads near the river.Rockingham County1 S Harrisons Xrds 05 1705EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was brought down on Harrisons Crossroads.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Alleghany County1 SSE Cherry Lane 05 1747EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was brought down on US Route 21.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Alleghany County2 ENE Glade Vly 05 1747EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)High winds left a tree down across Glade Valley Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Alleghany County2 NE Cherry Lane 05 1747EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Tree reported down on the Blue Ridge Parkway.A cold front crossed into the area at peak heating of the day creating high instability along with moderate shear. Scatteredthunderstorms developed ahead of the front as well as more organized lines closer to the front, producing downburst winds butvery little hail. In addition, there was some training of cells which resulted in isolated flash flooding. The severe weather andflooding occurred primarily in the foothills and over the Piedmont. Note: The estimated wind gust of 50 knots is equivalent to58 mph.Rockingham County5 SSW Gold Hill 11 2100EST2200EST 0 0 3.00K 0.00K Flash FloodHeavy rains caused culverts to be washed out along Sunrise Acres Drive.Stokes County2 SW Mt Olive 11 2104EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was brought down by thunderstorm winds at the intersection of Locust Road and William Fowler Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County1 NNW Meadows 11 2130EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A single tree was reported blown down by thunderstorm winds near the intersection of Highway 89 and Sunset Park Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stokes County1 E Vade Mecum 11 2200EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Moore Springs Road.A few severe storms developed within a very hot and humid air mass over the Piedmont bringing several reports of winddamage in Stokes county, and flooding in Rockingham county. Note: The estimated wind gust of 50 knots is equivalent to 58mph.330

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, Northwest and North CentralRockingham County2 ESE Price 12 1646EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown down near the intersection of Price Road and Lindy Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockingham County3 E Price 12 1646EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down near the intersection of Garrett road and Center Meeting Home Road. Garrett Road waspartially blocked.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Rockingham County3 NE Stoneville 12 1652EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down along Snead Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockingham County3 ENE Stoneville 12 1655EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown down by thunderstorm winds on Rakestraw Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockingham County2 ENE Stoneville 12 1655EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was knocked over by high winds along Snead Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockingham County1 E Stoneville 12 1657EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown down along Settle Bridge Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockingham County1 W Wentworth 12 1705EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown down near the intersection of Highway 65 and Hancock Road.A strong storm tracked southeast from near the Virginia border to around Wentworth before weakening. This storm produced anumber of high wind reports with tree damage. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wilkes County3 ESE Elkville 18 1955EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)NORTH CAROLINA, South CoastalThunderstorm winds blew down a tree across Beaver Creek Road.A frontal boundary remained stalled out across southern Virginia with very high moisture in place. Thunderstorms developed inthe early afternoon over the foothills and pushed out into the Piedmont and one storm became severe over Wilkes County.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Brunswick County2 WSW Seaside 06 1235EST1236EST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)A hand held anemometer measured a wind gust to 64 mph.A weak cold front extended across central North Carolina into western South Carolina during the afternoon. A series of weakupper level disturbances provided the lift for convection. Along and south of this boundary, the air mass was very unstable.Thunderstorms organized into short line segments with surface-based CAPE values of 2000-3000 J/kg. Note: The measuredwind gust of 56 knots is equivalent to 64 mph.331

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, South CoastalNCZ101New Hanover07 0900EST1800EST 0 0 Rip CurrentA new moon combined with long period swells from Tropical Storm Colin produced strong rip currents that required numerousrescues.Pender CountyBurgaw 12 1645EST1646EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A large tree was reported down on North Wright Street. The time of occurrence was estimated based on radar data.A hot, humid and modestly unstable air mass was in place as a 500 mb ridge sat over the area. Northwest mid-level flow of 20to 30 knots helped organize convection into short line segments. Note: The estimated wind gust of 50 knots is equivalent to 58mph.New Hanover County2 NNE Seagate 18 1405EST 0 0 20.00K 0.00K LightningLightning struck a NWS employee's house, causing some structural damage and a fire.Lightning struck a house north of Masonboro.New Hanover County1 SSE East Wilmington 19 1445EST 0 0 100.00K 0.00K LightningLightning struck a house at 5119 Somersett Lane, causing significant damage.Firefighters responded to several reports of lightning strikes.New Hanover CountyWilmingtonEast Wilmington19 1520EST1700EST 0 0 1.00K 0.00K FloodThere was around a foot of water with stalled cars on Oleander Drive near Dawson Street. Flooding was also reported on SouthCollege Road, between the intersections of Wilshire Boulevard and Wrightsville Avenue.High precipitable water, combined with a strong short wave and cold front, caused minor flooding in Wilmington.Pender County5 W Burgaw 22 1830EST2000EST 0 0 0.00K 0.00K Heavy RainOver six inches of rain produced minor flooding over portions of interior Pender County.Heavy rain produced minor flooding across portions of Pender County.NORTH CAROLINA, SouthwestMcdowell County2 NW Davistown 04 1630EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on Bartlett Hollow Rd and another was blown down in the same area on Bat Cave Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison County1 NW Allegheny 04 1815EST 0 0 Thunderstorm Wind (55EG)Several trees were blown down along highway 212, about 13 miles north of Marshall.Scattered airmass thunderstorms developed over the North Carolina mountains during the afternoon hours. A couple of thestorms briefly became severe. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.332

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, SouthwestRutherford County1 ENE Rock Spgs 05 1244EST 0 0 Hail (1.00)Quarter size hail fell at the River Creek Campground.Buncombe County1 SE Bingham Hgts 05 1310EST 0 0 Thunderstorm Wind (55EG)Multiple trees were blown down on Adams Hill Rd, on the northwest side of Asheville. Some trees fell on vehicles.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Caldwell County1 SE Patterson 05 1330EST 0 0 Hail (1.00)Caldwell CountyPatterson1 NE Warrior05 1330EST1335EST 0 0 Thunderstorm Wind (55EG)Several trees and large limbs were blown down in and around the city of Patterson.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Mcdowell County1 NW Sunny Vale 05 1345EST 0 0 Thunderstorm Wind (50EG)A couple trees were blown down on highway 80, several miles northwest of Marion.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Alexander County1 NW Paynes Store 05 1405EST 0 0 Thunderstorm Wind (55EG)Several large trees were blown down on Paul Payne Store Rd. A chimney was also blown off the roof of a home near thislocation.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Iredell County2 SSW Statesville Rhyne Ar 05 1414EST 0 0 Hail (1.00)Caldwell County2 WSW Dudley Shoals 05 1430EST 0 0 Thunderstorm Wind (50EG)Power lines were blown down on Temple Hill Church Rd, a little over 7 miles southeast of Lenoir. A tree was blown down inthe same area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caldwell County1 SE Mortimer 05 1440EST 0 0 Thunderstorm Wind (50EG)Large tree limbs were blown down on Brown Mountain Beach Rd in the extreme western part of the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Catawba County3 NNW Oyama 05 1459EST 0 0 Thunderstorm Wind (50EG)Power lines were blown down about 3 miles northeast of Hickory.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Catawba County1 ESE Claremont 05 1459EST 0 0 Thunderstorm Wind (50EG)Power lines were blown down on Cloninger St in Claremont.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.333

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, SouthwestIredell County3 WNW Amity Hill 05 1500EST 0 0 Thunderstorm Wind (50EG)Two large trees were blown down on Shiloh Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison CountyBig Laurel 05 1530EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on Big Laurel Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Madison County1 NE Petersburg 05 1530EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on Petersburg Rd, about 4 miles northeast of Marshall.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cabarrus County32 W Kannapolis 05 1535EST 0 0 Thunderstorm Wind (50EG)Two trees were blown down on Maiden Highway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rowan County2 WSW Enochville 05 1552EST 0 0 Thunderstorm Wind (50EG)A few trees were blown down over the southwest part of the county, including on Unity Church Rd to the west of Enochvilleand Goldfish Rd near Interstate 85.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Yancey County1 S Day Book 05 1600EST 0 0 Thunderstorm Wind (50EG)Two trees were blown down on Jacks Creek Rd, about 4 miles north of Burnsville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Avery County1 WSW Elk Park 05 1612EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on Buck Mountain Rd, about a mile northwest of Elk Park near the Tennessee line.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Avery County1 ESE Montezuma 05 1612EST 0 0 Thunderstorm Wind (50EG)A tree was blown down near Hospital Dr a couple miles southeast of Newland.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Graham County1 E Brock 05 1615EST 0 0 Thunderstorm Wind (50EG)Two trees were blown down on highway 28 near Lower Tuskeegee Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buncombe County1 ENE Midway 05 1635EST 0 0 Thunderstorm Wind (50EG)Large tree limbs were blown down on Christ School Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.334

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, SouthwestRowan County3 ENE Kannapolis 05 1636EST 0 0 Thunderstorm Wind (50EG)A couple of trees were blown down on I-85 near mile marker 64.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cabarrus County1 ESE Midland 05 1640EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on Garmon Mill Rd in Midland.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cabarrus County2 NNE Flows Store 05 1640EST 0 0 Thunderstorm Wind (50EG)Power lines were blown down on Meeting St, about 6 miles southeast of Concord.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mecklenburg CountyAlexanders Store 05 1654EST 0 0 Thunderstorm Wind (50EG)A few trees were blown down on the east side of Charlotte, including on Saddle Ridge Rd and Arlington Church Rd.Mecklenburg County4 ESE Hoods8 SE AllenNote: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1720EST1730EST 0 0 Thunderstorm Wind (50EG)A few trees were blown down from the Indian Trail-Fairview Rd area to the Fairview community.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rutherford County6 N Hollis 05 1732EST 0 0 Thunderstorm Wind (50EG)Union County1 W Fairview1 NE UnionvilleTrees were blown down on highway 226.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1735EST1741EST 0 0 Thunderstorm Wind (50EG)A few trees were blown down along highway 218 in the northwest part of the county, down to the Unionville area.Rutherford County1 SE Rutherfordton1 NE Alexander MillsNote: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1741EST1746EST 0 0 Thunderstorm Wind (50EG)Several trees were blown down from Rutherfordton to Spindale to Forest City.Cleveland County1 SE Shelby1 ENE Patterson SpgsNote: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1745EST1750EST 0 5 Thunderstorm Wind (50EG)A tree was blown down on an occupied car on Warren St in Shelby. The five people inside the car received minor injuries,mainly in the form of lacerations. Also, two trees were down on Earl Rd, about 1.5 miles southeast of Shelby and on PattersonDr in Patterson Springs.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.335

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, SouthwestUnion County1 E New Salem 05 1925EST 0 0 Thunderstorm Wind (55EG)Numerous trees and power lines were blown down in the vicinity of New Salem.Widespread thunderstorm activity developed over the mountains and along a lee trough over the North Carolina foothills duringthe afternoon hours. The storms produced several areas of wind damage and some large hail. Note: The estimated wind gust of55 knots is equivalent to 63 mph.Davie County5 S Cornatzer 06 1800EST 0 0 Thunderstorm Wind (50EG)Multiple large tree limbs were blown down off highway 801.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rowan County1 W Landis 06 1805EST 0 0 Thunderstorm Wind (50EG)Multiple large tree limbs were blown down about 3 miles west southwest of China Grove.Mecklenburg County1 NNE Haskings Mills1 SSE DeritaNote: The estimated wind gust of 50 knots is equivalent to 58 mph.06 2100EST2300EST 0 0 20.00K 0.00K Flash FloodA stream gauge on Irwin Creek at Statesville Rd exceeded the established flood stage by more than 2 feet, flooding a portion ofDilworth Rd. Flash flooding along Stewart Creek forced evacuations of an apartment complex on Southwest Bvd. Waterrescues from automobiles were also reported on the north side of the city during this time.A couple thunderstorms developed along a cold front over the western North Carolina piedmont during the early evening hours.The storms produced a little wind damage.Macon County3 SSW Franklin2 NNE Cartoogechaye13 1656EST1705EST 0 0 Thunderstorm Wind (55EG)Numerous trees and power lines blown down west of the city of Franklin, from Old Murphy Rd, to Industrial Park Rd, to nearthe Wayah Rd, highway 64 intersection.A few thunderstorms developed along a dissipating cold front over the southwest mountains of North Carolina. One of thestorms became pulse severe and produced an area of damaging winds. Note: The estimated wind gust of 55 knots is equivalentto 63 mph.Burke County3 NW Table Rock 15 0200EST0300EST 0 0 0.00K 0.00K Flash FloodFlooding developed along Irish Creek and Rose Creek. A campground was flooded along Rose Creek Rd, while Irish Creekflooded portions of Fish Hatchery Ave.An area of strong thunderstorms, followed by a persistent period of upslope enhanced rainfall, resulted in a small area of flashflooding over northwest Burke County during the early morning hours.Yancey County3 W Bald Mtn 17 1700EST1830EST 0 0 20.00K 0.00K Flash FloodA stretch of Bald Mountain Rd was closed in the western part of the county due to flooding along Bald Mountain Creek.Several bridges were damaged by high water. A school bus was briefly stranded in the high water and two children wererescued from the bus.Madison County1 W English1 SSE Faust17 1710EST1830EST 0 0 20.00K 0.00K Flash FloodFlash flooding developed along smaller streams in northern Madison County, including the Cane River. Several roads wereflooded or closed, including Wolf Laurel Rd, part of which was washed out, and Puncheon Fork Rd. Part of Village Ln waswashed out and a covered bridge was destroyed in this area as well.336

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, SouthwestA stationary area of thunderstorms dropped very heavy rain along the Madison, Yancey county line, which resulted in flashflooding during the early evening hours.Mcdowell CountyEast Marion 18 1730EST 0 0 Thunderstorm Wind (50EG)A tree was blown down near the intersection of Memorial Park Rd and highway 70, about 2 miles east northeast of Marion.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mcdowell County1 SE West Marion 18 1730EST 0 0 Thunderstorm Wind (50EG)A tree was blown down near mile marker 82 along Interstate 40, about 3 miles south of Marion.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Gaston County2 WSW South Gastonia 18 1750EST 0 0 Thunderstorm Wind (50EG)Mecklenburg County1 ESE Thomasboro1 ENE Clt Brockenbrough ArA tree was blown down on Chapel Grove Rd and another was blown down at the intersection of Elizabeth Lane and ElizabethDr, about 6 miles southwest of Gastonia.Scattered airmass thunderstorms developed over western North Carolina during the late afternoon hours. A couple of the stormsbecame pulse severe, producing small areas of wind damage. Note: The estimated wind gust of 50 knots is equivalent to 58mph.19 0455EST0700EST 0 0 50.00K 0.00K Flash FloodQuite a few roads were closed near the city center, mainly on the east side, primarily due to poor drainage. Affected roadsincluded Tryon St, East 4th St, Hubbard Rd, and Delilah Ln. Several water rescues were required from automobiles in this area.Additionally, a stream gauge on Mallard Creek reached the established flood stage near Harrisburg. Heavy rainfall also causedthe roof to collapse at a homeless shelter on N College St.Cleveland County1 W Shelby1 WNW Oakgrove19 0515EST0600EST 0 0 10.00K 0.00K Flash FloodA small stream overflowed its banks, flooding the basement of a home on Leander St, about 2 miles southwest of Shelby.Hickory Creek flooded the basement of another home on Windsor Dr. Muddy Creek also overflowed its banks and threatenedsome homes about 4 miles east of Shelby.Mitchell County1 SE Bakersville 19 1524EST 0 0 Thunderstorm Wind (50EG)Two trees were blown down on Baker Ln.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mcdowell County3 SSE Nebo 19 1700EST 0 0 Thunderstorm Wind (50EG)Several small trees were blown down about 6 miles east of Marion.Rowan CountyTrading Ford1 NW PooletownNote: The estimated wind gust of 50 knots is equivalent to 58 mph.19 1900EST2030EST 0 0 0.00K 0.00K Flash FloodSeveral creeks overflowed their banks and flooded several roads in eastern portions of the county. Roads affected includedBringle Ferry Rd, Black Rd, Richfield Rd and Saint Peters Church Rd.337

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH CAROLINA, SouthwestRowan CountyTrading Ford1 NW Pooletown19 2030EST2300EST 0 0 0.00K 0.00K FloodAlthough heavy rain ended across the area during the late evening, flooding persisted along several small streams in the easternpart of Rowan County before beginning to recede around midnight.Cabarrus County1 E Concord 19 2040EST2200EST 0 0 0.00K 0.00K Flash FloodHeavy rain caused Wolfemeadow Creek to overflow its banks and flood Stough Rd. Several roads were also flooded and closedin the city, mainly due to poor drainage. Some of the flooded roads included Roberta Rd, Concord Pky, Manor Ave, CabarrusAve and Green St.Thunderstorms developed along a stationary front over the western North Carolina piedmont during the early morning hours.The training storms produced very heavy rain from Shelby to the Charlotte metro area, which resulted in flash flooding. Laterin the day thunderstorms again developed over the region. The storms produced more flash flooding over the North Carolinapiedmont, northeast of Charlotte. A couple of the storms became pulse severe, producing a little wind damage.NORTH DAKOTA, Central and WestWilliams County7 NNW Trenton 01 1500CST1515CST 0 0 0.00K 0.00K Hail (1.00)Williams County11 N Trenton 01 1502CST1513CST 0 0 15.00K 0.00K Hail (1.00)The large hail resulted in broken windows on a home.Mckenzie County11 N Watford City 01 1502MST1509MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Estimated winds of 60 mph were reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mckenzie CountyKeene 01 1515MST1521MST 0 0 0.00K 0.00K Hail (1.00)Williams CountyWilliston 01 1520CST1528CST 0 0 0.00K 0.00K Hail (1.00)Williams County7 SE Williston 01 1530CST1545CST 0 0 35.00K 0.00K Hail (1.50)Williams County5 SE Williston 01 1530CST1532CST 0 0 35.00K 0.00K Hail (1.75)Damage was sustained to vehicles and siding on a home.Williams County9 ESE Williston 01 1530CST1540CST 0 0 12.00K 0.00K Hail (1.75)A camper and truck were dented.338

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestWilliams County8 SE Williston 01 1530CST1540CST 0 0 40.00K 0.00K Hail (1.75)Windows were broken on the north side of a home, and car windshields were broken out.Mckenzie County1 N Mandaree 01 1543MST1548MST 0 0 0.00K 0.00K Funnel CloudSeveral funnel clouds appeared underneath a rotating wall cloud. The funnel clouds did not reach the surface.Rolette County1 SSW Dunseith 01 1815CST1822CST 0 0 0.00K 0.00K Hail (0.88)Mercer County16 S Beulah 01 1916MST1921MST 1.65 40 0 0 50.00K 0.00K Tornado (EF0)A tornado touched down in Mercer County and impacted a farmstead. A large cottonwood tree was uprooted and two grain binswere destroyed. The damage corresponded to a middle EF0 on the Enhanced Fujita Tornado Scale. From that it was determinedthat wind speeds were around 75 mph.Oliver County13 WSW Hannover 01 1928CST1938CST 0 0 0.00K 0.00K Hail (1.75)Morton County4 NW New Salem 01 1945CST1953CST 0 0 0.00K 0.00K Hail (1.00)Morton CountyNew Salem 01 1946CST1953CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Estimated winds of 60 mph were reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Morton County5 NW New Salem 01 1948CST1957CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Estimated winds of 60 mph were reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Morton CountyNew Salem 01 2000CST2010CST 0 0 0.00K 0.00K Hail (1.50)Morton CountyNew Salem 01 2000CST2010CST 0 0 150.00K 250.00K Thunderstorm Wind (70EG)Large hail accompanied the strong thunderstorm winds. The wind driven hail and strong winds resulted in widespread damagein the town of New Salem. Several trees were uprooted, and hail damage was sustained to homes and vehicles.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.339

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestMorton County3 S Judson 01 2010CST2014CST 0 0 0.00K 0.00K Funnel CloudA brief funnel cloud was reported from a trained spotter traveling on Interstate 94 west of Mandan.Morton County4 NE Sweet Briar 01 2013CST2021CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Estimated winds of 60 mph were reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Rolette County3 N Rolette 01 2045CST2101CST 5.79 30 0 0 0.00K 0.00K Tornado (EF0)This tornado occurred in the open country. No structures were impacted, so no damage was done. The Rolla Fire Departmentwas also reporting this tornado to the National Weather Service in real time.In the mid afternoon hours of Sunday, August 1st, Severe Thunderstorm Watch number 559 was issued for much of westernand north central North Dakota. Later, during early Sunday evening, the watch was expanded to include south central NorthDakota. A remnant outflow boundary across northeast Montana and northwest North Dakota was the focus for isolatedsupercells as they tracked east-southeast from northwest North Dakota in the afternoon, into south central North Dakota in theevening. Additional thunderstorm development took place across north central North Dakota, where mid level short waveimpulses provided the necessary lift along a surface trough.Several severe thunderstorm and tornado warnings were issued. Multiple reports of large hail, several reports of severethunderstorm winds, and two confirmed tornadoes occurred during this episode.Mountrail County6 SW Parshall Arpt 02 1120CST1128CST 0 0 0.00K 0.00K Hail (0.88)Mclean County9 NNW Garrison 02 1220CST1226CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Pea size hail and heavy rain accompanied the strong thunderstorm winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mclean County1 SSE Max 02 1225CST 0 0 4.00K 0.00K LightningLightning struck a car resulting in the air bags being deployed and other damage. A person in the car suffered minor injuries.Time and placement of this event is based on a newspaper article and archived radar data. It is estimated.Morton County5 NNE Sweet Briar 02 1336CST1337CST 0.17 20 0 0 0.00K 0.00K Tornado (EF0)The public reported that a brief tornado touched down in the open country near Crown Butte Dam. No structures were impactedso no damage was done.Morton County1 W Mandan 02 1403CST1425CST 0 0 0.00K 0.00K Funnel CloudFunnel clouds repeatedly formed and dissipated underneath a rotating wall cloud west of Mandan. None of the funnels touchedthe ground.340

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestMorton County3 NW Mandan 02 1414CST1425CST 0 0 8.00K 0.00K Thunderstorm Wind (57MG)The strong thunderstorm winds combined with large hail resulted in damage to siding on a home.Note: The measured wind gust of 57 knots is equivalent to 66 mph.Morton CountyMandan 02 1416CST1424CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Estimated winds of 70 mph were reported on the northwest side of Mandan.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Morton County1 NNW Mandan 02 1424CST1430CST 0 0 0.00K 0.00K Hail (1.00)Morton County1 S Mandan 02 1425CST1433CST 0 0 0.00K 0.00K Hail (1.00)Burleigh County3 WNW Bismarck 02 1425CST1434CST 0 0 0.00K 0.00K Thunderstorm Wind (61MG)Note: The measured wind gust of 61 knots is equivalent to 70 mph.Morton County1 SSE Mandan 02 1430CST1438CST 0 0 0.00K 0.00K Hail (1.00)Burleigh County3 NNE Bismarck 02 1435CST1443CST 0 0 0.00K 0.00K Hail (1.00)Morton County2 E Mandan 02 1436CST1443CST 0 0 0.00K 0.00K Hail (1.75)Burleigh County2 N Bismarck 02 1440CST1448CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Estimated winds of 65 mph were reported.The combination of a short wave trough over central Montana, and a weak instability axis stretched from northwest to southeastacross central North Dakota, resulted in scattered severe thunderstorms over portions of central North Dakota during theafternoon hours of Monday, August 2nd.Two severe thunderstorm warnings and two tornado warnings were issued. Numerous reports of large hail, several reports ofsevere thunderstorm winds, several reported funnel clouds, and one confirmed tornado occurred during this episode. Note: Theestimated wind gust of 56 knots is equivalent to 64 mph.Mclean CountyWashburn 07 0030CST 0 0 4.00K 0.00K LightningElectrical appliances in a home were damaged due to a lightning strike on a tree near the home. Also damaged was a vehiclewhich had its side window blown out.An early morning lightning strike in the town of Washburn, McLean County resulted in damage to electrical appliances in ahome, along with damage to a vehicle outside of the home.341

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestDunn County4 N Dunn Center 09 1440MST1447MST 0 0 0.00K 0.00K Hail (1.50)Slope County10 SSE Amidon 09 1515MST1522MST 0 0 0.00K 0.00K Hail (1.00)Stark County12 S Belfield 09 1540MST1548MST 0 0 0.00K 0.00K Hail (1.00)Slope County9 ENE Amidon 09 1645MST1651MST 0 0 0.00K 0.00K Hail (0.88)Slope County9 ENE Amidon 09 1645MST1652MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An estimated wind speed of 60 mph was reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mountrail County9 W Parshall 09 1700CST1710CST 0 0 65.00K 0.00K Hail (1.75)The large hail resulted in broken windows to mobile homes.Mountrail County9 SE New Town 09 1700CST1710CST 0 0 0.00K 0.00K Hail (1.00)Mountrail County9 SE New Town 09 1700CST1710CST 0 0 50.00K 0.00K Thunderstorm Wind (61EG)Large hail accompanied the strong thunderstorm winds. Powerlines were reported down along with a carport blown over.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Mountrail County9 W Parshall 09 1700CST1710CST 0 0 80.00K 75.00K Thunderstorm Wind (70EG)Large hail accompanied the strong thunderstorm winds. The wind driven hail resulted in broken windows to area homes andsome crop damage.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Mckenzie County14 N Grassy Butte 09 1728MST1736MST 0 0 0.00K 0.00K Hail (1.00)Mountrail County8 S Blaisdell 09 1730CST1738CST 0 0 0.00K 0.00K Hail (1.00)Mountrail CountyTagus 09 1730CST1740CST 0 0 0.00K 0.00K Hail (0.88)342

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestMountrail County3 NNW Stanley 09 1846CST1851CST 0 0 0.00K 0.00K Hail (1.75)Renville County12 SSW Grano 09 1950CST1959CST 0 0 0.00K 0.00K Thunderstorm Wind (59MG)Note: The measured wind gust of 59 knots is equivalent to 68 mph.Ward County5 NW Berthold 09 2305CST2312CST 0 0 0.00K 0.00K Hail (1.00)Ward County5 NW Berthold 09 2305CST2312CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Large hail accompanied the strong thunderstorm winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ward CountyCoulee 09 2307CST2315CST 0 0 35.00K 0.00K Thunderstorm Wind (65EG)A trained spotter reported his employer had has barn destroyed by strong thunderstorm winds.Severe Thunderstorm Watch number 595 was issued for west and north central North Dakota for the late afternoon and eveninghours of Monday, August 9th. This was in anticipation of strong to severe thunderstorms developing along a surface frontlifting across the state, combined with increasing ascent with the approach of an upper level impulse.Multiple severe thunderstorm warnings were issued. Numerous reports of large hail and several reports of severe thunderstormwind gusts were received during this episode. Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Renville CountyMohall 10 0926CST0931CST 0 0 0.00K 0.00K Hail (0.88)Mchenry County5 S Deering 10 1330CST1345CST 0 0 0.00K 0.00K Hail (1.00)Ward County5 N Donnybrook 10 1338CST1343CST 0 0 0.00K 0.00K Hail (1.75)Ward County5 N Donnybrook 10 1345CST1359CST 0 0 0.00K 0.00K Hail (1.00)Renville County12 SSW Norma 10 1355CST1407CST 0 0 0.00K 0.00K Hail (1.00)Mclean County1 E Ruso 10 1404CST1414CST 0 0 0.00K 0.00K Hail (1.00)Lingering outflow boundaries over north central North Dakota from earlier thunderstorm activity, combined with several midlevel short wave impulses moving over the state, triggered additional scattered thunderstorms during the late morning and earlyafternoon hours of Tuesday, August 10th.Several reports of large hail were received during this episode.343

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestMckenzie County5 E Fairview 11 1903MST1910MST 0 0 0.00K 0.00K Hail (1.75)Mckenzie County5 NE Grassy Butte 11 2001MST2016MST 0 0 0.00K 0.00K Hail (1.00)Adams County15 E Haynes 11 2003MST2010MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public reported an estimated wind speed of 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Dunn County15 N Killdeer 11 2054MST2108MST 0 0 0.00K 0.00K Hail (1.75)Mountrail County1 SSW Parshall 11 2212CST2219CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Estimated winds of 60 mph were reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Divide County5 E Crosby 11 2218CST2225CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Estimated winds of 60 mph were reported along with small hail and very heavy rain.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ward County1 NNE Des Lacs 11 2303CST2309CST 0 0 0.00K 0.00K Thunderstorm Wind (65MG)Note: The measured wind gust of 65 knots is equivalent to 75 mph.Ward County1 W Minot 11 2310CST2317CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Estimated winds of 65 mph were reported.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Ward County1 W Minot 11 2316CST2321CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)This was the second of two rounds of wind to strike the city of Minot. The first round was associated with a gust front, and thissecond gust was associated with heavy precipitation.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Burleigh County2 E Moffit 11 2347CST2352CST 0 0 0.00K 0.00K Thunderstorm Wind (59MG)Note: The measured wind gust of 59 knots is equivalent to 68 mph.Mclean County7 N Emmet 11 2351CST12 0001CST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.344

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestStutsman County1 NW Jamestown 12 0123CST0128CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)A mid level trough ejecting northeast through the Northern Rockies, combined with a stalled frontal boundary, resulted instrong to severe thunderstorm development across central Montana in the late afternoon. These storms continued to move anddevelop eastward into western and portions of central North Dakota during the evening hours of Wednesday, August 11th andinto the early morning of Thursday, August 12th.Multiple severe thunderstorm warnings were issued. Several reports of large hail and multiple reports of severe thunderstormwind gusts were received during this episode. Note: The measured wind gust of 52 knots is equivalent to 60 mph.Adams County1 SE Reeder 12 1830MST1840MST 0 0 0.00K 0.00K Hail (1.50)La Moure County8 N Verona 12 1914CST1916CST 0 0 0.00K 0.00K Funnel CloudAdams County5 SE Reeder 12 1928MST1936MST 0 0 0.00K 0.00K Hail (1.00)Stark County1 N Belfield 12 1934MST1940MST 0 0 0.00K 0.00K Hail (1.75)Burke CountyFlaxton 12 1942CST1949CST 0 0 0.00K 0.00K Hail (1.75)Adams County4 E Reeder 12 1945MST1953MST 0 0 0.00K 0.00K Hail (1.50)Adams CountyHettinger 12 1948MST1959MST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)Note: The measured wind gust of 55 knots is equivalent to 63 mph.Stark County1 SE South Heart 12 1950MST2012MST 0 0 200.00K 200.00K Hail (2.50)The largest hailstone during this event was two and one half inches in diameter. The large hail damaged windows, siding,crops, and vehicles.Adams CountyHettinger 12 1959MST2014MST 0 0 0.00K 0.00K Thunderstorm Wind (81MG)Note: The measured wind gust of 81 knots is equivalent to 93 mph.Burke County5 W Bowbells 12 2000CST2001CST 0.1 20 0 0 0.00K 0.00K Tornado (EF0)A brief tornado touched down in the open country west of Bowbells. No structures were impacted so no damage was done. Thistornado was spawned from the same supercell thunderstorm that later produced another brief tornado in Burke County and along tracked high end EF3 tornado from Burke into Ward County. See the other two tornado entries for Burke County and thetornado entry for Ward County from August 12.345

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestBurke County2 NW Bowbells 12 2003CST2004CST 0.11 20 0 0 0.00K 0.00K Tornado (EF0)A second brief tornado touched down in the open country just west of the Bowbells airport. No structures were impacted so nodamage was done. This tornado was spawned from the same supercell thunderstorm that earlier produced a brief tornado inBurke County, and later produced a long tracked high end EF3 tornado from Burke into Ward County. See the other twotornado entries for Burke County and the tornado entry for Ward County from August 12.Adams CountyHettinger 12 2014MST2022MST 0 0 0.00K 0.00K Thunderstorm Wind (61MG)Note: The measured wind gust of 61 knots is equivalent to 70 mph.Burke County3 ENE Bowbells 12 2026CST2040CST 2.55 400 0 0 700.00K 150.00K Tornado (EF3)This tornado crossed from Burke County into Ward County. Note that for roughly three miles in the vicinity of the Des LacsRiver, U.S. Highway 52 runs right on the Burke and Ward County line. The tornado was right on the highway in this area. Thiswas the location of the worst damage with this tornado. Farm property on the north side of the highway, Burke County, and onthe south side of the highway, Ward County, was impacted. One fatality and one injury occurred here, in a single automobiletravelling along the highway, on the county line. The vehicle came to rest in a field, nearly 200 yards off the highway, on thesouth side of the highway, on the east side of the river, in Ward County. See the EF3 tornado entry for Ward County fromAugust 12.This third tornado touched down just northeast of Bowbells, Burke County, and tracked east-southeast along U.S. Highway 52,and into Ward County where it dissipated. This EF3 tornado was spawned from the same supercell thunderstorm that earlierproduced two brief and weak tornadoes in Burke County.Meteorologists from the National Weather Service conducted a storm damage survey on Friday, August 13, 2010.Meteorologists walked through the area and spoke with numerous people affected, some of whom were eye witnesses to theevent.Significant damage occurred nearly six miles east of Bowbells, near the Des Lacs River, where U.S. Highway 52 is on theBurke and Ward County line. Three farms were impacted. The worst damage was on the Burke County side of the highway andwest side of the river, where a farm home (DI 2, DOD 8) and six outbuildings were destroyed. Nineteen of 21 grain bins werealso damaged or destroyed. In addition, a fifty foot air seeder connected to a cultivator, with a combined estimated weight near60,000 pounds, was moved approximately 100 yards. Based on a lack of scratch marks in the ground it was determined that thisequipment was picked up and carried through the air. A second farm, on the Ward County side of the highway, had trees inshelter belts snapped and uprooted and the chimney on the house damaged. A third house, this one on the east side of the riverand the Ward County side of the highway, also had significant damage. Here, one camper was thrown into the river on thesouth side of the Highway 52 bridge that crosses the river, while another camper was thrown into the river and landed on thenorth side of the bridge, back into Burke County. The house had damage to siding and shingles.Of all the damage surveyed the absolute worst corresponded to a high EF3 on the Enhanced Fujita Tornado Scale. From that itwas determined that peak wind speeds in the tornado were on the order of 165 mph.One fatality and one injury occurred in an automobile in this same immediate area. A car with two occupants travelling eastalong U.S. Highway 52 was picked up and carried over the Des Lacs River, and came to rest 200 yards off the highway, in afield east of the river, and on the Ward County side of the highway. The driver of the vehicle was injured and the passenger waskilled.See the other two tornado entries for Burke County, and the EF3 tornado entry for Ward County from August 12 as this tornadocrossed into Ward County.Burke CountyBowbells 12 2031CST2037CST 0 0 0.00K 0.00K Hail (1.00)346

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestHettinger CountyRegent 12 2035MST2045MST 0 0 0.00K 0.00K Thunderstorm Wind (70EG)Estimated winds of 80 mph were reported.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Hettinger County1 SW Mott 12 2035MST2045MST 0 0 150.00K 200.00K Thunderstorm Wind (80EG)Damage was reported to trees and power lines. Damage was also reported to a grain bin and an elevator roof in the city of Mott.Ward County10 NNE Niobe9 N KenmareNote: The estimated wind gust of 80 knots is equivalent to 92 mph.12 2040CST2055CST 2.48 400 1 1 500.00K 100.00K Tornado (EF3)This tornado crossed from Burke County into Ward County. Note that for roughly three miles in the vicinity of the Des LacsRiver, U.S. Highway 52 runs right on the Burke and Ward County line. The tornado was right on the highway in this area. Thiswas the location of the worst damage with this tornado. Farm property on the north side of the highway, Burke County, and onthe south side of the highway, Ward County, was impacted. One fatality and one injury occurred here, in a single automobiletravelling along the highway, on the county line. The vehicle came to rest in a field, nearly 200 yards off the highway, on thesouth side of the highway, on the east side of the river, in Ward County. See the EF3 tornado entry for Burke County fromAugust 12.This third tornado touched down just northeast of Bowbells, Burke County, and tracked east-southeast along U.S. Highway 52,and into Ward County where it dissipated. This EF3 tornado was spawned from the same supercell thunderstorm that earlierproduced two brief and weak tornadoes in Burke County.Meteorologists from the National Weather Service conducted a storm damage survey on Friday, August 13, 2010.Meteorologists walked through the area and spoke with numerous people affected, some of whom were eye witnesses to theevent.Significant damage occurred nearly six miles east of Bowbells, near the Des Lacs River, where U.S. Highway 52 is on theBurke and Ward County line. Three farms were impacted. The worst damage was on the Burke County side of the highway andwest side of the river, where a farm home (DI 2, DOD 8) and six outbuildings were destroyed. Nineteen of 21 grain bins werealso damaged or destroyed. In addition, a fifty foot air seeder connected to a cultivator, with a combined estimated weight near60,000 pounds, was moved approximately 100 yards. Based on a lack of scratch marks in the ground it was determined that thisequipment was picked up and carried through the air. A second farm, on the Ward County side of the highway, had trees inshelter belts snapped and uprooted and the chimney on the house damaged. A third house, this one on the east side of the riverand the Ward County side of the highway, also had significant damage. Here, one camper was thrown into the river on thesouth side of the Highway 52 bridge that crosses the river, while another camper was thrown into the river and landed on thenorth side of the bridge, back into Burke County. The house had damage to siding and shingles.Of all the damage surveyed the absolute worst corresponded to a high EF3 on the Enhanced Fujita Tornado Scale. From that itwas determined that peak wind speeds in the tornado were on the order of 165 mph.One fatality and one injury occurred in an automobile in this same immediate area. A car with two occupants travelling eastalong U.S. Highway 52 was picked up and carried over the Des Lacs River, and came to rest 200 yards off the highway, in afield east of the river, and on the Ward County side of the highway. The driver of the vehicle was injured and the passenger waskilled.See the other three tornado entries for Burke County from this event on August 12. This tornado crossed into Ward Countyfrom Burke. M51VESioux County1 N Selfridge 12 2123MST2133MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Estimated winds of 70 mph were reported.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.347

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestRenville CountyTolley 12 2222CST2227CST 0 0 0.00K 0.00K Hail (1.00)Emmons CountyLinton 12 2250CST2259CST 0 0 15.00K 0.00K Thunderstorm Wind (70EG)Strong thunderstorm winds tore the roof off of a trailer home.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Morton CountySt Anthony 12 2318CST2328CST 0 0 0.00K 0.00K Thunderstorm Wind (63MG)A significant severe weather event evolved during the evening hours of Thursday, August 12th, and continued into the earlymorning hours of Friday, August 13th. Southwest flow aloft was in place across the Northern Plains region, ahead of an upperlevel trough over the Northern Rockies. A potent upper level impulse ejecting from the base of the trough provided the triggerfor two areas of strong to severe convection. The first area was near a stationary boundary across southern North Dakota, whereintense thunderstorm winds of 80 to near 100 mph were observed. The second area was ahead of a cold front over north centralNorth Dakota, where an isolated tornadic supercell developed and spawned an EF3 tornado near Bowbells.Well into this event, Severe Thunderstorm Watch number 605 was issued across southwest and south central North Dakota inanticipation of a Mesoscale Convective System over southwest North Dakota tracking eastward along the South Dakota borderarea. By the time of the watch issuance, the tornadic supercell over north central North Dakota had dissipated.Multiple severe thunderstorm and tornado warnings were issued. Several reports of large hail, numerous reports of strongthunderstorm winds, and one confirmed EF3 tornado was received during this episode.The EF3 tornado tragically claimed one fatality. An automobile traveling east on Highway 52 was picked up and carriedseveral hundred yards before being thrown into a field. Another person in the car was injured. In addition, a farmstead sustainedheavy damage from the tornado, with severe damage observed to the home and several outbuildings. Note: The measured windgust of 63 knots is equivalent to 72 mph.NDZ034-045Morton - Sioux12 2318CST2340CST 0 0 0.00K 0.00K High WindNDZ035-046Burleigh - Emmons13 0000CST0058CST 0 0 0.00K 0.00K High WindStrong winds developed on the backside of thunderstorm activity, as lingering showers enabled strong winds associated with anocturnal low level jet to reach the surface. Winds in excess of 80 mph were observed.Wells County1 SE Heaton 30 0401CST0411CST 0 0 0.00K 0.00K Hail (1.75)Wells County1 SE Heaton 30 0430CST0436CST 0 0 0.00K 0.00K Hail (1.75)An isolated severe thunderstorm resulted in two reports of large hail over Wells County in east central North Dakota.Dickey County6 SW Guelph 30 1620CST1626CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An estimated wind gust of 60 mph was received.348

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, Central and WestSevere Thunderstorm Watch number 635 was issued for south central and southeastern North Dakota during the late afternoonhours of Monday, August 30th. This was in anticipation of rapid thunderstorm development near a frontal boundary liftingnortheast into eastern North Dakota.One report of a severe thunderstorm wind gust was received during this episode. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.NORTH DAKOTA, EastBenson County6 N Leeds9 NE Niles01310000CST2359CST 0 0 0.00K 0.00K FloodNelson County9 WNW Pelto3 N Dahlen01310000CST2359CST 0 0 0.00K 0.00K FloodRamsey County1 NW St Joe5 NE Derrick01310000CST2359CST 0 0 0.00K 0.00K FloodAfter their late June peaks around 1452 feet MSL, Devils Lake and Stump Lake continued a slow downward trend through themonth of August. However, both lakes still remained above 1451 feet MSL.Towner County1 NW Rocklake 01 1915CST 0 0 Thunderstorm Wind (60EG)Ten inch diameter trees were felled and a garage was pushed off its foundation. A leg of a fertilizer plant was toppled over.Towner County3 N Crocus9 ENE OlmsteadNote: The estimated wind gust of 60 knots is equivalent to 69 mph.01 1920CST1938CST 10 150 0 0Tornado (EF1)This tornado tracked for nearly 20 miles, about 10 miles in Towner County and 10 miles in Cavalier County. During much ofthis track, the tornado was likely enveloped in heavy rains and strong downburst winds with the funnel briefly visible at times.The tornado broke down two wooden power poles and numerous trees and tree limbs along its route. Peak winds wereestimated at 95 mph.Cavalier County5 WNW Munich 01 1938CST1955CST 10 150 0 0Tornado (EF1)This tornado began in Towner County at 820 pm CDT. The tornado tracked for about 20 miles total, about 10 miles in TownerCounty and then about 10 miles in Cavalier County. During much of this track the tornado was likely enveloped in heavy rainsand strong downburst winds with the funnel briefly visible at times. The tornado broke down two wooden power poles andnumerous trees and tree limbs along its route. Peak winds were estimated at 95 mph.Cavalier CountyMunich 01 1940CST 0 0 Thunderstorm Wind (60EG)Sixteen inch diameter trees were snapped. It may have been accompanied by a funnel cloud, but it was rain wrapped and hardto see.A persistent thunderstorm cell along the Canadian border produced a tornado and several reports of strong winds. Note: Theestimated wind gust of 60 knots is equivalent to 69 mph.Richland County1 SSW Tyler 07 1718CST 0 0 0.00K 0.00K Funnel CloudA funnel cloud developed several miles south of Wahpeton, just south of the Tyler elevator complex.349

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, EastRichland County3 SSW Tyler 07 1725CST1737CST 2.5 600 0 0Tornado (EF4)This tornado touched down south of Tyler and tracked to the east for roughly 2.5 miles before crossing the Bois de Sioux Riverinto Wilkin County, Minnesota. In Wilkin County, the tornado continued for another 2.5 miles and lifted about 650 pm CDT.The total track length was about 5 miles and peak winds were estimated at 175 mph.By late in the day on the 7th, an east-west lying warm front had set up just north of the South Dakota border, extendingeastward into west central Minnesota. South of the warm front, temperatures were in the mid to upper 80s with dew points inthe lower 70s. Thunderstorms formed along and north of the warm front and several produced tornadoes.Grand Forks County3 SE Holmes 10 1236CST1237CST 0.9 50 0 0Tornado (EF2)A tornado struck a farmstead in southern Grand Forks County, damaging a large well constructed equipment shed. The tornadotraveled over a shelterbelt along the west edge of the property causing considerable damage. Several pieces of farm equipmentwere moved and flipped. An empty grain bin was removed from its foundation and lofted 300 yards, with much of the binlanding in the northwest corner of the shelterbelt.Towner County5 NW Egeland 10111600CST0400CST 0 0 5.00K 10.00K Flash FloodStreet flooding was reported in Egeland.As an upper level disturbance lifted into eastern North Dakota, a semi-circle of thunderstorms formed around its northern andeastern periphery. As a segment of these storms moved north of Mayville, they produced a brief tornado near Holmes.Cass County1 SSW Davenport 12 1241CST 0 0 Hail (1.00)Cass County4 NW Fargo 12131400CST0300CST 0 0 10.00K 5.00K Flash FloodStreet flooding occurred around the Fargo area from the heavy rain.Ransom County5 NW Lisbon Muni Arpt3 NW Lisbon12 1940CST1955CST 4.61 25 0 0Tornado (EF0)Tree damage was noted along the four mile tornado path, with numerous branches snapped off. Peak winds were estimated at80 mph.Cass County1 W Riverside 12 2000CST 0 0 Thunderstorm Wind (52EG)Dime sized hail also fell.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cass County2 WNW Fargo 12 2006CST 0 0 Thunderstorm Wind (58MG)The strong winds occurred in south Fargo.Note: The measured wind gust of 58 knots is equivalent to 67 mph.Cass County2 WNW Fargo 12 2036CST 0 0 Thunderstorm Wind (59MG)A second round of strong winds occurred in south Fargo.Note: The measured wind gust of 59 knots is equivalent to 68 mph.350

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010NORTH DAKOTA, EastRansom County6 NW Ft Ransom 12132045CST0400CST 0 0 10.00K 15.00K Flash FloodThe heavy rain washed out a road north of Fort Ransom, stranding its driver.A strong low level jet and good warm advection helped to spawn a couple strong thunderstorms in the early morning hours ofthe 12th. Then there was a brief break before strong thunderstorms began to flare up again by the early afternoon.Thunderstorms kept firing north of a warm front located over northeast South Dakota and southern Minnesota, as the low leveljet and warm advection stay strong through the day. These storms produced very heavy rainfall rates and some flash flooding aswell as sporadic reports of strong winds into the evening.Richland CountyOswald 18 0835CST 0 0 Hail (0.88)Richland CountyHankinson 18 0835CST 0 0 Hail (0.88)A nearly stationary boundary set up from northeast South Dakota into west central Minnesota during the morning of the 18th.Showers and thunderstorms formed north of the surface boundary and tracked east with time, some producing large hail.Ramsey County4 W Starkweather 20 1756CST 0 0 Hail (0.75)Ramsey County4 WSW Starkweather 20 1756CST 0 0 Hail (0.88)Ramsey County3 NNE Webster 20 1805CST 0 0 Hail (1.00)Several thunderstorms formed north of Devils Lake early in the evening of the 20th. One thunderstorm rapidly intensified andbecame severe over the course of two volume scans on the radar (10 to 15 minutes), dropping large hail in the Garske area. Thethunderstorms held together as they moved across central Ramsey and northern Walsh County, but died as they reachednorthwest Grand Forks County.Eddy CountyNew Rockford 30 0454CST 0 0 Hail (1.00)Benson County1 W Tokio 30 0525CST 0 0 Hail (1.00)A deep trough had set up over the Rocky Mountains, with an amplified south-southwest flow over the central Dakotas. Anupper level disturbance ejected out of the base of the trough and moved up into the central Dakotas with a favorable upper leveljet. The combination of these factors helped to spawn thunderstorms between Carrington and Devils Lake.OHIO, EastCoshocton County2 E Tyndall 04 1355EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)The public reported widespread tree damage with large limbs down near Tyndall.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Muskingum County1 SE Duncan Falls 04 1409EST 0 0 40.00K 0.00K Thunderstorm Wind (50EG)A trained spotter in Philo reported numerous trees and power lines down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.351

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, EastCoshocton CountyWest Lafayette 04 1430EST 0 0 40.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported numerous trees and power lines down in West Lafayette.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Belmont CountyMorristown 04 1440EST 0 0 25.00K 0.00K Thunderstorm Wind (70EG)A newspaper reported the collapse of baseball dugouts and fencing at a Morristown highschool. The baseball bleachers werealso blown over.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Belmont County1 S Morristown 04 1445EST 0 0 50.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported numerous large trees down and a large tree on a house in Morristown.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Belmont County1 SE Barnesville 04 1450EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)The public reported numerous trees down in Barnesville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Harrison County1 NE New Athens 04 1455EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)Emergency Management reported numerous large pine trees snapped off in New Athens.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Belmont CountySt Clairsville 04 1500EST 0 0 Hail (1.00)Belmont County1 NE St Clairsville 04 1502EST 0 0 120.00K 0.00K Thunderstorm Wind (87EG)Emergency management reported that three 370-foot WWVA radio station towers were blown over and destroyed near Barton.Note: The estimated wind gust of 87 knots is equivalent to 100 mph.Collapsed 370-foot WWVA radio tower in Belmont county Ohio.352

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, EastBelmont CountySt Clairsville 04 1510EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)The public reported that a roof was blown off of an outbuilding.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson CountyTiltonsville 04 1510EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported numerous trees down in Tiltonsville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson County1 W Wintersville 04 1510EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported numerous trees down in Wintersville.A mesoscale convective system moved along a boundary situated over east central Ohio, southern Pennsylvania and NorthernWest Virginia. Severe thunderstorms across eastern Ohio, southwest Pennsylvania, northern West Virginia, and Garrett countyMaryland produced widespread wind damage with 50 thousand homes left without power. The counties that were hardest hitwere Belmont and Jefferson counties in Ohio, where numerous large trees blocked roadways and three large radio stationtowers collapsed. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Carroll County1 NW Carrollton 14 1725EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)OHIO, NorthLaw enforcement reported trees down in Carrollton.An area of thunderstorms developed ahead of a cold front producing isolated damage in eastern Ohio and some flash floodingacross parts of western Pennsylvania. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Marion CountyWaldo 04 1233EST 0 0 75.00K 0.00K Thunderstorm Wind (50EG)Two barns collapsed due to thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Morrow County5 WSW Marengo 04 1255EST 0 0 5.00K 0.00K Thunderstorm Wind (57MG)A 66 mph thunderstorm wind gust was measured. Several four inch diameter tree limbs were downed by the thunderstormwinds.Note: The measured wind gust of 57 knots is equivalent to 66 mph.Knox CountyCenterburg 04 1310EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed two large trees.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Stark County5 ESE Navarre 04 1400EST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed numerous large trees in a camping area near Haut and Sherman Church roads. No injuries werereported at the camping area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hancock CountyFindlay 04 2054EST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)An automated sensor at the Findlay Airport measured a thunderstorm wind gust of 61 mph.Note: The measured wind gust of 53 knots is equivalent to 61 mph.353

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, NorthSeneca CountyNew Riegel 04 2125EST 0 0 12.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed to large tree limbs and an out building was blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Crawford CountyBucyrus 04 2155EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed a large Sycamore tree.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Huron CountyNorwalk 04 2200EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)05Thunderstorm winds downed two trees.As a quasi-stationary frontal boundary approached northern Ohio from the west, a widespread area of convective thunderstormsdeveloped. The severe weather began shortly after noon and lasted well into the evening hours. Note: The estimated wind gustof 50 knots is equivalent to 58 mph.Ottawa CountyOak Harbor 11 1340EST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds toppled a utility pole and a large tree.A warm lifted into northern Ohio during the afternoon hours of August 11th. Showers and thunderstorms developed along thefront. One of the stronger thunderstorms became severe. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lucas County4 W Monclova 15 1630EST1635EST 0 0 150.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm downburst winds estimated to be as much as 75 mph caused considerable damage in the Monclova area. Adamage path nearly three miles in length was observed. Hundreds of trees were downed along the damage path. A couplehomes were also damaged.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wood CountyPerrysburg 15 1634EST 0 0 0.00K 0.00K Hail (0.75)Penny sized hail occurred with this thunderstorm.Lucas CountyToledo Metcalf Fld 15 1647EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A 60 mph thunderstorm wind gust was measured at Metcalf Field.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ottawa CountyGenoa 15 1653EST 0 0 20.00K 0.00K Hail (1.25)Half dollar sized hail was observed.Wood CountyMillbury 15 1653EST 0 0 5.00K 0.00K Hail (0.75)Penny sized hail was reported during this thunderstorm.Ottawa CountyGenoa 15 1704EST 0 0 0.00K 0.00K Hail (0.75)Penny sized hail was reported during this thunderstorm.Ottawa CountyGenoa 15 1704EST 0 0 10.00K 0.00K Hail (1.00)Quarter sized hail was measured during this thunderstorm.354

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, NorthOttawa CountyElmore 15 1711EST 0 0 5.00K 0.00K Hail (0.75)Penny sized hail was reported with this thunderstorm.Ottawa CountyElmore 15 1711EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed a couple of 12-15 diameter tree limbs.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ottawa CountyElmore 15 1711EST 0 0 75.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed numerous large tree limbs onto power lines. Widespread power outages resulted in the easternportion of Elmore.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ottawa CountyElmore 15 1711EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed a three foot diameter tree onto Toledo Street.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ottawa CountyOak Harbor 15 1725EST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed several large limbs. A railroad crossing bar was also snapped off by the high winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ottawa CountyOak Harbor 15 1725EST 0 0 70.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds uprooted a tree measuring four feet in diameter and 70 feet in height. The tree fell onto a house and causedmoderate damage.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ottawa CountyOak Harbor 15 1725EST 0 0 50.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed numerous large trees and power lines. Two trees measuring four feet in diameter and thirty feettall were uprooted. A vehicle was damaged by one of the trees.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ottawa County3 E Oak Harbor 15 1731EST 0 0 1.00K 0.00K Thunderstorm Wind (53MG)OHIO, NorthwestA thunderstorm wind gust of 61 mph was measured. Thunderstorm winds downed small tree limbs at the time of the measuredgust.An area of low pressure located in Ontario, Canada and associated occluded frontal system passed through the area during theafternoon and evening hours on August 15, 2010. Note: The measured wind gust of 53 knots is equivalent to 61 mph.Williams CountyEdgerton 04 1022EST1023EST 1 0 0.00K 0.00K Thunderstorm Wind (55EG)Local newspapers reported that a 18 year old male was killed as a result of strong winds blowing down a 12 foot high interiorcinder block wall. The incident happened at a construction site at the Edgerton High School. No details were provided if thewall had been secured or was free standing. M18EQNote: The estimated wind gust of 55 knots is equivalent to 63 mph.355

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, NorthwestVan Wert County1 S Converse 04 1103EST1104EST 0 0 0.00K 0.00K Thunderstorm Wind (60EG)Emergency management officials reported damage from east of Elgin to east of Converse Road, south of 81. Four power poleswere blown down as well as several corn fields being flattened. A few trees were blown down as well, but showed signs of rot.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Allen County1 N Spencerville 04 1111EST1112EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Law enforcement officials reported a large tree down.A complex of thunderstorms moved into northwestern Ohio from portions of northern Indiana. While the storms wereweakening, isolated wind damage did occur, which resulted in one death at a construction site in Edgerton, Ohio. Note: Theestimated wind gust of 55 knots is equivalent to 63 mph.Henry CountyTexas 11 1637EST1638EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Law enforcement officials reported large tree limbs down on County Road 4A, just north of US 24.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Paulding County1 N Paulding 11 1655EST1656EST 0 0 0.00K 0.00K Thunderstorm Wind (55EG)Emergency management officials reported shingles and siding blown off a house on County Road 117, just north of Highway111. A six inch diameter tree was snapped, with a maple tree with signs of rot being blown over.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Paulding County3 SSE Cecil 11 1655EST1656EST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)OHIO, SoutheastA weak upper level system and moderate instability allowed for thunderstorms to develop. A lack of overall shear resulted inthe storms producing isolated wind damage as cells collapsed or cold pools established. Note: The measured wind gust of 53knots is equivalent to 61 mph.Perry County1 E New Lexington 04 1325EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A tree and other large branches fell across Tunnel Hill Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Perry CountyShawnee 04 1335EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Perry CountySomerset 04 1335EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A tree fell onto power lines. Other large branches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.356

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SoutheastPerry County1 NNE Buckingham 04 1337EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)A tree and other large branches fell across Route 155 near Drakes.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Athens County1 ENE Palos 04 1350EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down near Burr Oak Lake.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Perry CountyMt Perry 04 1350EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A tree and other large branches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Morgan CountyMalta 04 1400EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Large branches and a tree fell across Route 78.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Vinton CountyMc Arthur 04 1435EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Meigs CountyHarrisonville 04 1440EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees fell onto power lines along Route 143.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Meigs County1 E Minersville 04 1440EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Trees fell along Forest Run Road in Sutton Township.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Meigs CountyPortland 04 1500EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Vinton CountyMc Arthur 04 2300EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Meigs CountyHarrisonville 04 2330EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Several trees and large branches were blown down. Electric power outages occurred.In a hot and humid air, thunderstorms moved through southeast Ohio during the afternoon. Low level convergence was aidedby a leftover boundary from convection during the early morning hours. The thunderstorms moved southeast around 30 mphwith wind gusts the main hazard. The tall thunderstorms also produced considerable cloud to ground lightning. Brief repetitiveshowers increased concerns for flash flooding across Meigs County, but no flooding occurred.Another prefrontal cluster of showers and thunderstorms moved into southeast Ohio during the late evening hours. Note: Theestimated wind gust of 50 knots is equivalent to 58 mph.357

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SoutheastLawrence County1 SW Lisman 05 1140EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down along Route 522.In the humid air south of a front, a cluster of showers and thunderstorms moved rapidly east through Kentucky during themorning. The thunderstorms clipped extreme southern Ohio during midday, while moving into the southern half of WestVirginia. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Athens CountyNelsonville 11 1300EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down along Oak Street.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Athens County1 ENE East Clayton 11 1355EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Jackson CountyJacksonCoaltonLarge branches were blown down on County Road 73.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.11 1430EST1530EST 0 0 10.00K 0.00K Flash FloodSmall streams overflowed and blocked roads from the city of Jackson on into rural areas north and east of town.With plenty of sunshine, a convective complex developed during the heat of the afternoon over central Ohio in a weak windflow. The storms intensified as they drifted southeast into southern Ohio. The rain did bring some temporary relief from theheat. However, some minor wind damage occurred along with minor flash flooding. Rain rates of up to 2 inches in an hourwere likely.Lawrence CountyIronton 14 1949EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)OHIO, SouthwestRain gutters were ripped off a house.Thunderstorms developed during the afternoon over western Ohio and southeast Indiana. This was well south of a front, butalong a boundary leftover from previous convection. The storms intensified as they moved through southeast Ohio during theevening hours. Wind damage was the main hazard. However, brief localized downpours of an inch in 30 minutes did cause theusual minor street flooding. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mercer CountyColdwater 04 1111EST1116EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Two power poles were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Auglaize County4 N Wapakoneta 04 1125EST1129EST 0 0 120.00K 5.00K Thunderstorm Wind (78EG)Damaging thunderstorm winds resulted in several barns being damaged or destroyed, several silos with major damage ordestruction, trees down, and an old brick school being destroyed.Note: The estimated wind gust of 78 knots is equivalent to 90 mph.Hardin CountyKenton 04 1155EST1200EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were reported down in the southern half of the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.358

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SouthwestShelby CountyHoustonSidney04 1200EST1205EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Logan County2 SW Middleburg 04 1224EST1228EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large trees were snapped due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Montgomery County1 SW Shiloh 04 1225EST1226EST 0 0 Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Union CountyMarysville 04 1233EST1234EST 0 0 Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Union CountyMarysville 04 1235EST1240EST 0 0 Hail (1.75)Fairfield CountyBaltimore 04 1238EST1242EST 0 0 Hail (1.00)Greene CountyFairborn 04 1240EST1245EST 0 0 Hail (1.00)Clark County3 W Springfield 04 1240EST1245EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down due to damaging thunderstorm winds. Power lines and several large branches were also reporteddown around the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Delaware CountyDelaware 04 1248EST1255EST 0 0 15.00K 0.00K Thunderstorm Wind (55EG)Two tractor trailers were blown over and shingles were ripped off of a house due to damaging thunderstorm winds.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Greene County3 SE Fairborn 04 1248EST1252EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Several large tree limbs were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.359

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SouthwestUnion CountyRichwood 04 1258EST1302EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Delaware CountyLewis Center 04 1259EST1304EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Minor structural damage occurred due to damaging thunderstorm winds.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Delaware CountyAshley 04 1300EST1301EST 0 0 Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Greene County2 E Yellow SpgsCedarville04 1301EST1310EST 0 0 Hail (1.00)Delaware CountyKilbourne 04 1303EST1304EST 0 0 Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Franklin CountyWesterville 04 1303EST1307EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County(CMH)Port Columbus A 04 1309EST1310EST 0 0 Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Licking County3 NNW Johnstown 04 1309EST1314EST 2 4 110.00K 0.00K Thunderstorm Wind (78EG)A microburst hit an egg facility causing the collapse of three large barns and damaging another. This resulted in the fatalities oftwo men working in one of the collapsed structures. A large rooftop air conditioning unit was also pushed off the roof of anadjacent administrative building. Around the area there were several trees down and numerous broken limbs. In addition to thefatalities, four injuries were also reported. M33LS, M25LSNote: The estimated wind gust of 78 knots is equivalent to 90 mph.Franklin CountyColumbus 04 1318EST1323EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.360

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SouthwestFairfield CountyLancaster 04 1320EST1321EST 0 0 Thunderstorm Wind (56EG)The wind gust was estimated.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Franklin CountyWesterville 04 1322EST1325EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fayette County3 WNW Jeffersonville 04 1323EST1327EST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Large limbs were reported down in addition to several large trees and power poles. Half inch hail was also reported in the area.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Licking CountyUtica 04 1325EST1330EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Several large limbs were reported down due to damaging thunderstorm winds.Licking CountyFredoniaNewarkNote: The estimated wind gust of 50 knots is equivalent to 58 mph.04 1330EST1335EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees and branches were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Licking CountyBuckeye Lake 04 1334EST1339EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Several trees were reported down due to damaging thunderstorm winds. One of the trees fell onto a house.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickaway County2 NE New Holland 04 1340EST1345EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickaway CountyCircleville 04 1345EST1350EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees were reported down across the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Licking County2 SW St Louisville 04 1350EST1355EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down and metal roofing was off of a shed due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.361

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SouthwestWarren CountyMorrow 04 1402EST1406EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clermont County1 ESE Edenton 04 1411EST1416EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickaway County2 SE Stringtown 04 1411EST1416EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hocking County1 ESE Laurelville 04 1412EST1417EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A tree fell onto a house due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Brown CountyFayetteville 04 1420EST1425EST 0 0 1.00K Thunderstorm Wind (50EG)A tree was reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fairfield County1 N Bremen 04 1422EST1426EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Highland CountyHillsboro 04 1445EST1450EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large limbs were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ross CountySummithill 04 1446EST1451EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.A very unstable air mass was in place with temperatures in the 90s and dew points in the upper 70s. While forcing was weak,there was enough lift ahead of a mid-level impulse to spark widespread convection in the form of a mesoscale convectivesystem. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.362

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SouthwestDarke CountyNew MadisonGreenville04 2020EST2025EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees were reported down around the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Shelby CountySidney 04 2032EST2036EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Several large branches were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Montgomery CountyBrookville 04 2049EST2053EST 0 0 Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Montgomery CountyMiamisburg2 W Centerville04 2100EST2110EST 0 0 1.00K 0.00K Thunderstorm Wind (52MG)Several large branches were reported down due to damaging thunderstorm winds.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Montgomery CountyDayton 04 2109EST2111EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Several large branches were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Butler CountyMiddletown 04 2110EST2115EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greene CountyFairborn 04 2110EST2111EST 0 0 Thunderstorm Wind (52EG)The wind gust was estimated by the spotter.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Hardin CountyKenton 04 2110EST2112EST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A few large branches were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Butler CountyHamilton 04 2140EST2145EST 0 0 Hail (0.88)363

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SouthwestButler County2 E New Miami 04 2145EST2150EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Large limbs were reported down in the area. One tree limb struck a vehicle.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Butler CountyMiddletown 04 2150EST2155EST 0 0 Hail (0.88)Butler County1 NE Maud 04 2155EST2200EST 0 0 Hail (0.75)Warren CountyMason 04 2159EST2203EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Two trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickaway County1 SW Orient 04 2200EST2205EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Warren CountyKings Mills 04 2202EST2205EST 0 0 Hail (0.75)Franklin CountyGrove City 04 2203EST2207EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were reported down around the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County3 ESE Columbus 04 2213EST2217EST 0 0 Thunderstorm Wind (52EG)The spotter estimated the wind gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ross County6 N Chillicothe 04 2222EST2223EST 0 0 Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Licking CountyPataskala 04 2226EST2231EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were broken due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.364

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SouthwestFairfield County5 SE Lancaster 04 2245EST2250EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hocking CountyLogan 04 2250EST2255EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.A second mesoscale convective system moved through the area during the evening hours. Note: The estimated wind gust of 50knots is equivalent to 58 mph.Scioto CountyFranklin Furnace 05 1115EST1120EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A house was damaged when a tree fell onto it.A complex of storms moved across southern Ohio during the morning hours of the 5th. The main threat from these storms wasdamaging wind. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fairfield CountyPleasantville 11 1200EST1205EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Butler County2 W Hamilton 11 1338EST1342EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.A few severe storms developed and moved across the area on the 11th of August. The main threat from these storms wasdamaging wind. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickaway CountyTarlton 14 1315EST1320EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A few trees were reported down and some siding was torn off of a house due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Warren County3 NNE Stubbs Mills 14 1438EST1442EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Warren CountyHarveysburg 14 1445EST1450EST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Large branches were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.365

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OHIO, SouthwestFayette CountyOcta 14 1530EST1534EST 0 0 2.00K 5.00K Thunderstorm Wind (50EG)A few trees were uprooted and part of a bean field was flattened due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Butler CountyRoss 14 1533EST1537EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Warren CountyMorrow 14 1600EST1605EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A few trees were reported down due to damaging thunderstorm winds.Scioto CountyRubyvilleSouth WebsterNote: The estimated wind gust of 50 knots is equivalent to 58 mph.14 1900EST1905EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Trees were reported down due to damaging thunderstorm winds.A warm and moist air mass was in place across the region during the afternoon hours. Temperatures were in the upper 80s tolower 90s with dewpoints in the low to middle 70s. A weak mid level short wave combined with residual boundaries allowedfor scattered thunderstorm development through the mid afternoon hours. These thunderstorms continued into the earlyevening hours. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clermont CountyEdenton 15 1340EST1345EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees were reported down due to damaging thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Shelby County2 NW Sidney 15 1459EST1501EST 0 0 Hail (0.75)Shelby County2 NW Sidney 15 1459EST1500EST 0 0 Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Hamilton CountyCincinnati 15 1532EST1536EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A couple of trees and some power lines were reported down across the northern part of the city.Isolated severe weather developed during the afternoon hours of August 15th. The main threat was damaging winds. Note:The estimated wind gust of 50 knots is equivalent to 58 mph.366

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OKLAHOMA, EasternOKZ060-067-070-072Muskogee - Rogers - Sequoyah - Tulsa - Wagoner01040000CST2000CST 0 34 0.00K 0.00K Excessive HeatA strong subtropical high pressure system reestablished itself over the south central United States during the end of July andthis pattern persisted through the first several days of August. Exceptionally hot weather was the result with above normaldaytime temperatures of 101 to 106 degrees, which combined with high humidity resulted in 110 to 115 degree heat indexvalues. Little relief was felt at night as temperatures only fell to near 80 degrees during the overnight hours. The overnight lowtemperature recorded at the Tulsa International Airport the morning of August 3rd and 4th was 85 and 83 degrees, respectively,which are both usually warm even for northeastern Oklahoma in the summertime. At least 34 people were treated for heatrelatedillness in Tulsa during this period.Cherokee County10 NNE Tahlequah 01 1503CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)The public reported numerous tree limbs broken from strong thunderstorm winds at the Eagle Bluff Resort.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Le Flore CountyPoteau Kerr Arpt 01 1753CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Strong thunderstorm wind with measured gusts to 59 mph blew down large tree limbs and power lines on the east side of town.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Le Flore County1 W Fanshawe 01 1900CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Strong thunderstorm wind snapped a tree and blew down numerous large tree limbs.Thunderstorms developed along and to the north of a stationary frontal boundary extending across the area. Some of thethunderstorms produced damaging winds. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.OKZ060-064-066>067-070-072Creek - Muskogee - Okmulgee - Rogers - Sequoyah - Tulsa - Wagoner08150600CST2000CST 0 17 0.00K 0.00K Excessive HeatOKZ059-065-071-073McIntosh - Okfuskee - Pawnee - Pittsburg09151400CST1500CST 0 0 0.00K 0.00K Excessive HeatOKZ054>058-062-074>076Craig - Haskell - Latimer - Le Flore - Mayes - Nowata - Osage - Ottawa - Washington10151445CST1500CST 0 0 0.00K 0.00K Excessive HeatA strong subtropical high pressure system reestablished itself over the south central and southeastern United States during theAugust 8th through 15th timeframe. Exceptionally hot weather was the result with above normal daytime temperatures of 101to 106 degrees, which combined with high humidity resulted in 105 to 115 degree heat index values. Little relief was felt atnight as temperatures only fell into the 75 to 80 degree range during the overnight hours. Overnight low temperatures only fellinto the lower to middle 80s for several consecutive days at Tulsa International Airport, which is highly unusually even fornortheastern Oklahoma during the summertime. At least 17 people were treated for heat-related illness in Tulsa during thisperiod.Okmulgee County2 S Henryetta 12 1358CST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)Strong thunderstorm wind blew off the roof of a barn, damaged a mobile home, and blew down large tree limbs.Isolated thunderstorms developed during the afternoon hours across portions of eastern Oklahoma where hot and very humidconditions existed. One storm produced damaging wind. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.367

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OKLAHOMA, EasternRogers County3 E Catoosa4 SSE Verdigris14 0300CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Strong thunderstorm wind blew down numerous large tree limbs along a two mile stretch near East 580 Road between 241stand 289th East Avenue.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Tulsa County1 NW Broken Arrow Arpk 14 0355CST 0 0 40.00K 0.00K Thunderstorm Wind (61EG)Strong thunderstorm wind blew down trees and large tree limbs, damaged the roofs of several homes and blew down fences.The damage was confined in a swath from about 3/4 of a mile west of the intersection of Mingo Road and 75th Street South toMingo Road and 71st Street South.Isolated severe thunderstorms developed during the early morning, resulting in localized wind damage across a small area ofTulsa and Rogers Counties. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Mayes County4 ESE Adair 15 1730CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Strong thunderstorm wind blew down trees east of Adair.Thunderstorms developed as a weak surface boundary entered the very hot and humid airmass in place across easternOklahoma. Some wind damage occurred in northeast Oklahoma as a result of one of the storms. Note: The estimated wind gustof 52 knots is equivalent to 60 mph.OKZ049-053-060-072>076Choctaw - Haskell - Latimer - Le Flore - Pittsburg - Pushmataha - Sequoyah - Tulsa20220200CST1800CST 0 4 0.00K 0.00K Excessive HeatA strong subtropical high pressure system reestablished itself over the south central United States during the August 19ththrough 22nd timeframe. Exceptionally hot weather was the result with above normal daytime temperatures of 98 to 102degrees, which combined with high humidity resulted in 105 to 110 degree heat index values. Little relief was felt at night astemperatures only fell into the upper 70s to near 80 degrees during the overnight hours. At least four people were treated forheat-related illness in Tulsa during this period.Osage County13 WSW Burbank 31 1613CST 0 0 40.00K 0.00K Thunderstorm Wind (61EG)Strong thunderstorm wind damaged two mobile homes, destroyed two barns, and blew down large tree limbs.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Rogers County3 SSE Inola 31 1830CST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Muskogee County2 N Bacone 31 1850CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Strong thunderstorm wind blew over a set of metal bleachers at Bacone College.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mayes CountyPryor 31 1851CST1854CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Strong thunderstorm wind blew down numerous trees and large tree limbs.Thunderstorms developed ahead of a cold front that pushed into the region. Wind damage occurred across portions of easternOklahoma as these storms moved through the area. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.368

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OKLAHOMA, PanhandleTexas CountyGoodwell 01 0703CST0900CST 0 0 0.00K 0.00K Flash FloodA trained spotter reported that part of the golf course in Goodwell was flooded and that the bar ditches were overflowing. Nodamage or injuries were reported.Thunderstorms producing very heavy rainfall and were slow moving caused flash flooding in the central Oklahoma Panhandleduring the morning hours. No damage or injuries were reported.OKLAHOMA, Western Central and SoutheastOKZ004Harper01160000CST2359CST 0 0 DroughtVery dry conditions had existed over Harper county for a few months with below normal precipitation totals occurring sinceJune. It is too early to tell what impacts the dry conditions would have on area crops.Kay CountyBraman 04 1625CST1626CST 0 0 7.00K 0.00K Thunderstorm Wind (61EG)A roof was blown off a barn. Several tree limbs were downed as well. Monetary damages were estimated.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Kay County1 E Chilocco 04 1640CST1641CST 0 0 0.00K Thunderstorm Wind (65EG)A gas station canopy was blown onto a car just south of the Oklahoma/Kansas state line. Monetary damage estimates were notavailable.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Kay County8 E Newkirk 04 1700CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Kay County3 W Ponca City 04 1742CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Kay County5 WSW Ponca City 04 1745CST 0 0 0.00K 0.00K Hail (1.00)Noble County2 SE Marland 04 1840CST 0 0 0.00K 0.00K Hail (1.00)Thunderstorms developed along a weak cold front, with a few storms producing strong winds and marginally severe hail werereported over Kay and Noble counties. Wind damage was reported near Chilocco and Braman in Kay county.Harper County10 NNW Buffalo 07 1730CST1731CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Power lines were downed near the intersection of Willard Road and Adobe Springs Road. The time was estimated based onradar. Monetary damages were estimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Woods County19 WNW Camp Houston 07 1755CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)No damage was reported with the wind gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.369

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OKLAHOMA, Western Central and SoutheastHarper County4 ENE Buffalo 07 1800CST1801CST 0 0 3.00K 0.00K Thunderstorm Wind (56EG)A power pole and the associated power lines were downed on Highway 64. Monetary damages were estimated.Thunderstorms developed near a stalled front across northwest Oklahoma and adjacent portions of southwest Kansas.Damaging straight line winds occurred north of Buffalo in Harper county and east into northwest Woods county. Note: Theestimated wind gust of 56 knots is equivalent to 64 mph.Garfield CountyNorth Enid 08 1710CST1711CST 0 0 0.80K 0.00K Thunderstorm Wind (56EG)A couple of highway signs were damaged and several large tree limbs were downed. Monetary damages were estimated.A marginally severe thunderstorm developed west of Enid and moved northeast. Damaging winds were reported over NorthEnid, damaging highway signs and downing a few large tree limbs. Note: The estimated wind gust of 56 knots is equivalent to64 mph.Alfalfa County5 W Burlington 14 1755CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)No damage was reported with the wind gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Kay CountyBraman 14 1910CST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Note: The measured wind gust of 56 knots is equivalent to 64 mph.Kay County8 E Newkirk 14 2005CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Severe thunderstorms developed over south-central Kansas, ahead of a cold front that moved slowly toward northernOklahoma. By late mid evening, the thunderstorms moved into Alfalfa, Grant, and Kay counties. Strong winds accompaniedthe thunderstorms, with gusts around 60 mph reported near Braman and Newkirk. No damage was reported with the gusts.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Caddo County7 W Hinton 16 1755CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Scattered thunderstorms developed along a cold front and one storm west of hinton briefly became severe. No damage wasreported with the thunderstorm. Note: The measured wind gust of 52 knots is equivalent to 60 mph.Garfield CountyKremlin 20 1840CST1841CST 0 0 3.00K 0.00K Thunderstorm Wind (56EG)A couple of power poles were snapped approximately 8 feet from base. The poles were downed along the roadway. Monetarydamages were estimated.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Major CountyRingwood 20 1915CST1916CST 0 0 1.00K 0.00K Thunderstorm Wind (56EG)Large tree limbs were downed across the town. Monetary damages were estimated.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Garfield County2 WSW Enid 20 1950CST1951CST 0 0 1.50K 0.00K Thunderstorm Wind (52EG)Large tree limbs up to eight inches in diameter were downed, mainly across the western sides of Enid. Monetary damages wereestimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.370

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OKLAHOMA, Western Central and SoutheastBlaine CountySouthard 20 2020CST2021CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)No damage was reported with the wind gust.Thunderstorms developed along a weak front and moved east and southeast through the early to mid evening hours. Strongwinds accompanied the thunderstorms, producing some damage in the form of downed tree limbs and broken power poles. Thestorms weakened below severe limits shortly after sunset. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Murray CountyDavis 21 1515CST1516CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Power lines were downed throughout town. Monetary damages were estimated.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Jackson County6 SW Duke 21 1710CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)No damage was reported with the wind gust.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 N Ringling 21 1745CST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Note: The measured wind gust of 56 knots is equivalent to 64 mph.Cleveland County2 E Norman21 1750CST2 E (OUN)Norman Westheimer Arpt 1800CST 0 0 0.00K Thunderstorm Wind (61EG)A wet microburst caused a fairly concentrated area of wind damage between 1850 and 1900 CDT. The damage was reportedfrom near Tecumseh Road and 24th Avenue Northwest, southeast toward Main Street and 12th Avenue Northeast. Many treelimbs greater than four inches in diameter were downed (along with several smaller limbs), power poles were snapped, treetrunks greater than a foot in diameter were snapped, shingles were blown off of roofs, and several fence panels were blowndown. Rainfall totals from the event ranged from one to two inches, most of which fell in about 30 minutes. Monetary damageestimates were not available.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Comanche CountyLawton 21 2055CST 0 0 0.00K Thunderstorm Wind (57MG)Scattered thunderstorms developed along a weak, slow-moving cold front. A few wind gusts exceeded 60 mph, and rainfalltotals were between one and two inches over a very short amount of time. The high winds caused some damage, especiallyaround the Norman area. Sporadic damage also occurred across southern Oklahoma. Note: The measured wind gust of 57knots is equivalent to 66 mph.Carter County2 N Graham 23 1516CST1517CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)No damage was reported with the wind gust.Pulse-type thunderstorms developed in the hot and humid air mass over Oklahoma, ahead of a strong cold that moved towardthe southern Plains. Very little organization was associated with the thunderstorms, as most developed and collapsed quickly.Very heavy rainfall occurred for a short time, and winds gusted for a short time. One gust in Carter county reached around 60mph, although no damage was reported. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Caddo CountyCyril 31 1415CST1416CST 0 0 0.00K Thunderstorm Wind (56EG)Strong winds knocked down several power poles and associated power lines. Cyril High School lost a portion of its roof. Noinjuries were reported. Monetary damage estimates were not available.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.371

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OKLAHOMA, Western Central and SoutheastOklahoma County4 SW Oklahoma City 31 1555CST1556CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)Several 4-inch diameter tree limbs were downed near SW 25 Street and May Avenue. Monetary damages were estimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Garfield County4 W Enid 31 1600CST1601CST 0 0 4.00K 0.00K Thunderstorm Wind (56EG)Large power poles were downed near Garland Road and Highway 412. Monetary damages were estimated.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Caddo County2 W Cyril 31 1615CST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)OREGON, Central and EastA hot and humid air mass continued over Oklahoma during the afternoon. Lift associated with a mid-level disturbance travelingeast from New Mexico contributed to thunderstorm development during the mid afternoon hours. As was the case for severaldays, most of the thunderstorms were more pulse-like, causing them to form, strengthen, and collapse over a short amount oftime. However, the downburst associated with the collapsing storm produced winds exceeding 60 mph over some locations,along with extremely heavy rainfall. The strong winds caused some damage to trees, power lines/poles, and some structures.Note: The measured wind gust of 56 knots is equivalent to 64 mph.ORZ043Central Oregon02091044PST2300PST 0 0 WildfireThe Rooster Rock Wildfire started August 2 at 10:44 am 6 miles south of Sisters.Union County1 NNW May Park 05 1550PST 0 0 Hail (1.00)Amateur radio operator reported 1 inch diameter hail.Wallowa County1 S Imnaha 05 1655PST 0 0 Hail (0.75)Wallowa County1 S Imnaha 05 1706PST1710PST 0 0 Hail (1.75)Hail of ping pong and golf ball size reported by the public and a spotter.An upper level trough over combined with a disturbance moving north from southeast Oregon brought severe thunderstorms tonortheast Oregon during the late afternoon and evening.Wasco County1 S Pine Grove 17 1630PST 0 0 0.00K 0.00K Hail (1.00)Hail up to quarter size nearly covered the ground.Wasco County1 S Pine Grove 17 1630PST 0 0 Thunderstorm Wind (50EG)Branches up to 4 inches in diameter downed by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.372

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OREGON, Central and EastDeschutes County5 W Stearns 17 1725PST 0 0 Hail (0.88)Hail nearly covered the ground.Deschutes County3 N La Pine 17 1727PST 0 0 Hail (0.88)Deschutes County4 SSW Bend Sunriver Arpt 17 1745PST 0 0 Hail (1.00)An upper level low combined with afternoon instability to produce severe thunderstorms.OREGON, NorthwestORZ011Northern Oregon Cascades17311700PST2359PST 0 0 0.00K 0.00K WildfireThunderstorms moving through the North Oregon Cascades ignited several lightning-caused fires which burned a total of 4775acres.ORZ013Cascades in Lane County19310330PST2359PST 0 0 0.00K 0.00K WildfireOREGON, SoutheastThunderstorms moving through the Cascades in Lane County ignited a fire northeast of Mckenzie Bridge which burned 3464acres.Malheur County12 NW Vale 06 1720MST1740MST 0 0 0.00K 10.00K Hail (1.00)Damage to corn and sugar beets was reported by the public near Willow Creek, Oregon.Malheur CountyOntario 06 1910MST2200MST 0 0 0.00K 0.00K Flash FloodMalheur County Sheriff's Office reported that most streets in downtown Ontario were flooded.Malheur CountyHarper 06 1945MST2230MST 0 0 0.00K 0.00K Flash FloodOREGON, SouthwestTrained spotters in and around Harper, Oregon reported flooding in the town and along U.S. Highway 20 with 1.79 inches ofrain in about 2 hours.A weak shortwave trough combined with afternoon surface heating to produce strong to severe convection across parts ofMalheur County in Southeast Oregon on the 6th.Lake CountyPlush 06 1723PST1724PST 0 0 0.00K 0.00K Hail (1.25)Hail reported at the Plush General Store.Moist tropical flow fueled thunderstorm development on this afternoon and evening.373

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OREGON, SouthwestORZ024Eastern Curry & Josephine13310830PST2359PST 0 0 0.00K 0.00K WildfireThe Oak Flat wildfire started around 10 miles northwest of Selma Oregon around 0830 PDT on 08/13/2010. The cause isunder investigation, but it is likely that it was human caused. As of 09/01/2010, the fire area was 6515 acres and 70 percentcontained. 14.5 million dollars has been expended on the fire.Jackson County5 NE Voorhies 17 1518PST1523PST 0 0 0.00K 0.00K Hail (1.50)Jackson County2 SSW Tolo 17 1518PST1523PST 0 0 0.00K 0.00K Hail (1.00)This spotter also reported 0.80 inches of rain.Jackson County1 SW Central Pt 17 1518PST1523PST 0 0 0.00K 0.00K Hail (0.75)Jackson County1 N Medford 17 1518PST1523PST 0 0 0.00K 0.00K Hail (0.88)This employee also reported 0.96 inches of rain.Jackson County1 NE Medford 17 1525PST1530PST 0 0 0.00K 0.00K Hail (0.75)Reported by Scott Lewis at KDRV television station.Jackson County1 E (MFR)Medford Arpt 17 1525PST1530PST 0 0 0.00K 0.00K Hail (0.75)Lots of 1/2 inch hail with hail as large as 3/4 inches in diameter was reported by NWS contract workers on Biddle Road inMedford. Hail cracked their windshield while driving 30 mph.Jackson County1 SW Central Pt 17 1525PST1530PST 0 0 0.00K 0.00K Hail (0.75)Jackson County1 SSE Central Pt 17 1529PST1534PST 0 0 0.00K 0.00K Hail (1.25)Jackson County2 SE (MFR)Medford Arpt 17 1554PST1559PST 0 0 0.00K 0.00K Hail (1.50)Jackson County1 SE Butte Falls 17 1554PST1559PST 0 0 0.00K 0.00K Hail (1.00)Jackson County2 NE Medford 17 1555PST1600PST 0 0 0.00K 0.00K Hail (1.00)374

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010OREGON, SouthwestJackson CountyCentral Pt1 SE Seven Oaks17 1610PST1800PST 0 0 0.00K 0.00K FloodA spotter and a member of the public both reported street flooding in Central Point following a thunderstorm with heavy rain.A major intersection was flooded and some roads were closed for a brief period of time.Jackson CountyMedford 17 1623PST1628PST 0 0 0.00K 0.00K Hail (0.75)A trained spotter 1 mile from the airport on Merriman Road reported hail that dented the roof of his car. He also measured 0.20inches of rain.Klamath County7 SW Crater Lake 17 1625PST1630PST 0 0 0.00K 0.00K Hail (1.00)Klamath County4 SSW Crater Lake 17 1625PST1630PST 0 0 0.00K 0.00K Hail (0.88)The ground was covered with hail.Hot and moist air at low levels combined with an upper level disturbance to spawn many thunderstorms over southwest Oregonon this date. The winds were not strong...but heavy rain and large hail created problems across the area.ORZ029>031Central & Eastern Lake - Klamath Basin - Northern & Eastern Klamath & Western Lake23 0200PST0900PST 0 0 0.00K 0.00K Frost/FreezeAn unseasonably cold air mass brought near freezing temperatures to areas east of the Cascades in South Central Oregon.ORZ026Jackson24 1700PST2030PST 0 0 3.1M 0.00K WildfireA fire sparked by a transient consumed a barn and grassland on the west side of Interstate 5 near the south Ashland exit.Embers from the fire blew across the interstate and set a number of homes on fire east of the interstate. In the end, 11 homeswere destroyed and three more were damaged. No deaths or injuries were reported, but the neighborhood was evacuated andthe interstate was closed. Weather conditions that day was very hot with a high of 98 recorded in Ashland with relativehumidities in the single digits. Winds were upvalley and fairly typical for this time of year and this time of day.ORZ029-030Klamath Basin - Northern & Eastern Klamath & Western Lake31 0200PST0800PST 0 0 0.00K 0.00K Frost/FreezeAn unseasonably cold air mass brought freezing temperatures to areas east of the Cascades in South Central Oregon.PENNSYLVANIA, CentralSomerset County1 SW Addison 04 1635EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees and wires in Addison.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.375

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PENNSYLVANIA, CentralSomerset County1 WSW Orsina 04 1640EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees in Confluence.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cambria County1 W Conemaugh 04 1714EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees along William Penn Avenue.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cambria County1 NNW Geistown 04 1718EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees along Fulmer Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Somerset County1 S Meyersdale 04 1720EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees and wires in Meyersdale.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mifflin County1 S Juniata Terrace 04 1745EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees in Granville Township just south of Lewistown.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County1 ENE Greencastle 04 1750EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees in Greencastle.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.York County1 NNE Jacobs Mills 04 1935EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees and wires in Heidelberg Township southwest of Spring Grove.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Dauphin CountyHershey 04 2005EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees and utility wires on Chocolate and Park Avenues.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lebanon County1 SW Mt Pleasant 04 2025EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Adams County1 NW Mummasburg2 W NewchesterThunderstorm winds estimated near 60 mph knocked down trees along Route 322 between West Cornwall and South AnnvilleTownships.Severe Thunderstorms produced isolated wind damage during the late afternoon and evening. Note: The estimated wind gustof 50 knots is equivalent to 58 mph.12 1430EST1700EST 0 0 10.00K 0.00K Flash FloodHeavy thunderstorm rains produced flash flooding in Gettysburg. Several vehicles were stranded by high water.376

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PENNSYLVANIA, CentralCumberland County1 SW Mt Holly Spgs1 NNE Barnitz12 1430EST1700EST 0 0 5.00K 0.00K Flash FloodHeavy thunderstorm rains produced flash flooding in Mount Holly Springs. Several municipal streets and underpasses wereflooded.Dauphin County8 SSW Speeceville2 WNW Camp Curtin12 1430EST1800EST 0 0 10.00K 0.00K Flash FloodHeavy thunderstorm rains produced significant flash flooding throughout the city of Harrisburg. The flooding closed multipleroads including a portion of the I-283/83 interchange. High water also forced the evacuation of 40 residents on 19th andRollerston Streets.York County1 WNW Jacobs Mills1 WNW Blooming GroveTorrential thunderstorm rains produced flash flooding on Cameron Street and Berryhill in Harrisburg.Photo courtesy of Bob Stout, Dauphin County Emergency Management.12 1515EST1800EST 0 0 10.00K 0.00K Flash FloodHeavy thunderstorm rains produced flash flooding in Heidelberg Township. The flash flooding closed roads and strandedvehicles. One person had to be rescued from a flooded vehicle at the intersection of Thoman and Stennen Roads.Torrential thunderstorm rains over a short duration produced flash flooding across the lower Susquehanna Valley during themid to late afternoon. The very heavy rain caused significant flash flooding in downtown Harrisburg, northern York Countyand southern Adams County. Much of the area received locally heavy rains during the early morning hours which ultimately setthe stage for the afternoon convective rainfall to quickly run off into low-lying and poor drainage areas and small creeks andstreams. The urbanized areas of the Harrisburg metro area bore the brunt of the flooding, mainly due to the intensity of the rainand the concrete and other impervious surfaces that did not allow water to soak into the ground. There were numerous roadclosures due to high water and several people were rescued from stranded vehicles. High water also forced the evacuation of 40residents on 19th and Rollerston Streets.Cumberland County1 W Carlisle 16 1445EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Carlisle.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lebanon County2 WNW Fredericksburg 16 1455EST 0 0 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph pushed over a propane tank at a church camp on Mountain Drive near Lickdale.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.377

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PENNSYLVANIA, CentralLebanon County1 E Ono 16 1505EST 0 0 0.00K 0.00K Funnel CloudA funnel cloud was sighted near Ono.Adams County1 ENE Greenmount 16 1505EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Greemount.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lebanon County2 WNW Mt Zion 16 1520EST 0 0 10.00K Thunderstorm Wind (61EG)National Weather Service meteorologists and Lebanon County Emergency Management officials surveyed a long but sporadicarea of thunderstorm wind damage north of Lebanon city. The most concentrated area of damage was located around theFreeport Mills Golf Course, where severe winds estimated near 70 mph knocked down and uprooted over 20 trees along a 1mile path. The severe winds and associated tree damage produced minor structural damage to the golf course club house andblew out two windows. A separate residential home across the street on Freeport Road also sustained minor damage. Some cropdamage was visible along Golf Road near the golf course. Despite credible eyewitness reports of rotating wall and funnelclouds from trained spotters, none of the storm damage could definitely be attributed to a tornado. Therefore, the surveyconfirmed that the damage was caused by a microburst or straight line winds.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Thunderstorm winds estimated near 70 mph sheared off the top of this evergreen tree located on the FreeportMills Golf course north of Lebanon city (Lebanon County). Photo courtesy of Mike Dangelo, NWS State Collegewho was on-site to perform a storm survey.Dauphin County1 SW Linglestown 16 1530EST 0 0 Hail (1.00)Lancaster County1 N Durlach 16 1610EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees and utility wires a few miles east of Brickerville in ClayTownship.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lancaster CountyEphrata 16 1620EST 0 0 Thunderstorm Wind (58MG)A measured wind gust of 67 mph was reported in Ephrata.Note: The measured wind gust of 58 knots is equivalent to 67 mph.378

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PENNSYLVANIA, CentralLancaster County1 NNW New Holland 16 1640EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down large trees along Route 322 north of New Holland.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lancaster CountyEast Earl 16 1650EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph tore a roof off a building at the intersection of Route 322 and Ewell Road in EastEarl Township.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lancaster County3 WSW Churchtown 16 1655EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees near Churchtown.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lancaster County1 SW Beartown 16 1700EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down numerous trees and utility wires at the intersection of South PoolForge and Narvon Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Adams County1 WNW York Spgs 16 1855EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in York Springs.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.York CountyShrewsbury 16 2030EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)PENNSYLVANIA, EastThunderstorm winds estimated near 60 mph knocked down large trees in Shrewsbury.A cold front triggered severe thunderstorms over the Lower Susquehanna Valley during the late afternoon and early evening.The storms produced several reports of wind damage and isolated one-inch diameter hail. Note: The estimated wind gust of 50knots is equivalent to 58 mph.PAZ054-055Carbon - Monroe05310900EST2359EST 0 0 0.00K 0.00K DroughtOn August 5th, the Pennsylvania Department of Conservation issued a drought watch for the Poconos, including Monroe andCarbon Counties. The Department of Conservation urged residents in the Poconos to voluntarily reduce water use by 10 to 15percent. August concluded the third consecutive month of below normal rainfall in the Poconos for the meteorological summer.On a county weighted average, summer rainfall was 9.0 inches (3.5 inches below normal) in Monroe County and 10.4 inches(2.6 inches below normal) in Carbon County. At Mount Pocono (Monroe County), the summer rainfall total of 8.23 inches was4.34 inches below the current summer normal.PAZ067>071Bucks - Chester - Delaware - Montgomery - Philadelphia10110900EST1900EST 0 0 0.00K 0.00K Excessive HeatPAZ060Berks10110900EST1900EST 0 0 0.00K 0.00K Heat379

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PENNSYLVANIA, EastAn up to four day heat wave across southeastern Pennsylvania culminated with high temperatures in the mid 90s and afternoonheat indices of around 100F on the 10th. A pair of backdoor cold fronts ended the hot weather on the 12th. While there was aheat wave during the last couple of days in August (with some places equaling to recording the highest temperatures of themonth then), the 10th was the last time during 2010 that heat indices reached that high. Actual highest temperatures for the 10thand 11th included 96 degrees at the Philadelphia International Airport, Pottstown (Montgomery County) and Reading (BerksCounty) and 94 degrees in Doylestown.August 2010 was the 8th warmest August on record in Philadelphia with an average temperature of 79.0 degrees. The summerof 2010 was the 7th warmest meteorological summer on record for the state of Pennsylvania since 1895 with an averagetemperature of 71.2 degrees. It was progressively warmer farther to the east in Philadelphia and was the warmest summer onrecord in Philadelphia with an average temperature of 79.6 degrees, the second warmest summer on record in Mount Pocono(Monroe County) at 68.9 degrees and Reading (Berks County) at 76.4 degrees and the ninth warmest summer in record inAllentown (Lehigh County) at 74.0 degrees.Chester CountyHoney Brook 16 1710EST 0 0 0.00K 0.00K Hail (0.88)Chester CountyHoney Brook 16 1710EST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A severe thunderstorm tore down a few trees and wires in Honey Brook Township.Delaware County1 ENE Trainer1 SSW ChesterAn approaching cold front helped trigger a severe thunderstorm in Chester County during the early evening of the 16th. Note:The estimated wind gust of 52 knots is equivalent to 60 mph.22 1444EST1445EST 0.33 80 0 0 25.00K 0.00K Tornado (EF0)PENNSYLVANIA, WestAn EF-0 tornado touched down in Chester City on the afternoon of the 22nd. The first wind damage occurred near theintersection of 4th and Engle Streets where a couple of trees and a garage was blown down. A nearly continuous path of treedamage then occurred to the 2000 block of Third Street where several trees were blown down and structural damage occurredto a building and its roof. Additional damage occurred in a continuous path to the intersection of Pennsylvania State Route 291and Reaney Street where a house incurred siding and roof damage. The tornado then lifted as it approached the CommodoreBarry Bridge where planks were ripped off the new Interstate 95 ramp being constructed. The path length of the tornado wasapproximately 0.33 miles and its maximum path width was 80 yards. The estimated maximum wind speed was 75 mph. Noinjuries were reported.A line of showers and thunderstorms moved through southeastern Pennsylvania on the afternoon of the 22nd. A tornado formedalong this line in Delaware County.Washington County1 SSW West Alexander 04 1520EST 0 0 50.00K 0.00K Thunderstorm Wind (55EG)The public reported numerous trees down in West Alexander.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Fayette County1 N East Riverside 04 1600EST 0 0 20.00K 0.00K Thunderstorm Wind (55EG)Emergency management reported roof damage to a house near Isabella.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Washington County1 E Donora 04 1600EST 0 0 30.00K 0.00K Thunderstorm Wind (55EG)A trained spotter reported numerous trees down in Donora.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Washington County1 S Charleroi 04 1605EST 0 0 35.00K 0.00K Thunderstorm Wind (50EG)The public reported large trees down in Charleroi.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.380

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PENNSYLVANIA, WestFayette CountyHopwood 04 1610EST 0 0 50.00K 0.00K Thunderstorm Wind (50EG)An off duty NWS employee reported numerous trees and power lines down along State Route 40 near Hopwood.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fayette County1 WSW Belle Vernon 04 1610EST 0 0 50.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported numerous trees down along State Route 51 near Belle Vernon.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Westmoreland CountyMonessen 04 1610EST 0 0 50.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported numerous trees and power lines down in Monessen.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fayette County1 W Farmington 04 1620EST 0 0 35.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported numerous trees down in Farmington.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson County1 N Heathville 04 1620EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)Emergency management reported trees down in Heathville.A mesoscale convective system moved along a boundary situated over east central Ohio, southern Pennsylvania and NorthernWest Virginia. Severe thunderstorms across eastern Ohio, southwest Pennsylvania, northern West Virginia, and Garrett countyMaryland produced widespread wind damage with 50 thousand homes left without power. The counties that were hardest hitwere Belmont and Jefferson counties in Ohio, where numerous large trees blocked roadways and three large radio stationtowers collapsed. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Allegheny County1 NE Highcliff 14 2045EST 0 0 10.00K 0.00K Flash FloodThe public reported a creek flooding a parking lot and a basement along Babcock BLVD.Butler County1 W St Joe1 W Clinton14 2045EST2245EST 0 0 25.00K 0.00K Flash FloodA trained spotter reported flash flooding with State Route 228 blocked by flowing water in spots.Butler County1 NNE Butler Graham Arpt 14 2045EST2245EST 0 0 50.00K 0.00K Flash FloodEmergency management reported numerous roads closed across Penn Township due to flash flooding and debris washed ontoroads.381

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PENNSYLVANIA, WestButler County2 WNW Middle Lancaster2 SW WhitestownDebris piled against a bridge on a secondary road in Penn Township.14 2045EST2245EST 0 0 50.00K 0.00K Flash FloodEmergency management reported numerous roads closed due to flash flooding and debris washed onto roads across Jacksonand Lancaster Townships.An area of thunderstorms develped ahead of a cold front producing isolated damage in eastern Ohio and some flash floodingacross parts of western Pennsylvania.RHODE ISLANDProvidence County1 WSW Grants Mills1 WNW Arnold Mills05 1537EST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)Three to four trees on Tower Hill Road were downed by thunderstorm winds. Trees also were downed on Arnold Mills andDiamond Hill Roads.A cold front moved through the area producing thunderstorms and heavy rain across Southern New England. Note: Theestimated wind gust of 50 knots is equivalent to 58 mph.SOUTH CAROLINA, CentralSumter CountyRembertDalzell06 1346EST1352EST 0 0 8.00K 0.00K Thunderstorm Wind (55EG)Black River Electric reported trees and powerlines down from Rembert to Dalzell with many outages.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Sumter CountyPinewood 06 1410EST1412EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Sumter DOT reported a couple of trees down in Pinewood blocking South Hampton road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clarendon CountyManning 06 1450EST1454EST 0 0 14.00K 0.00K Thunderstorm Wind (65EG)Sheriff reported trees and powerlines down in Manning and signs down on Hwy 261. Some of the utility poles were broken offat the base.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.382

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, CentralClarendon CountyTurbeville 06 1450EST1454EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Sheriff reported a couple of trees down in the Turbeville area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fairfield County3 SSE Monticello 06 1617EST1621EST 0 0 6.00K 0.00K Thunderstorm Wind (55EG)Fairfield Electric reported power outages on Hwy 213 from trees down on powerlines.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Calhoun County2 SSE Lone Star 06 1711EST1715EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Sheriff reported trees down near Lonestar and Creston at Hwy 33 and Hwy 6.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Orangeburg CountySpringfield 06 1730EST1732EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Sheriff reported a couple of trees down on Springfield road and Buffalo Pond road near Capital Hwy.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Orangeburg County2 SSW Orangeburg 06 1757EST1759EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Sheriff reported a couple of trees down on Bamberg Hwy just southwest of Orangeburg.Orangeburg County5 NE Branchville1 NW DorangeNote: The estimated wind gust of 50 knots is equivalent to 58 mph.06 1819EST1831EST 6.19 40 0 0 6.00K 0.00K Tornado (EF0)Storm survey by spotters from the Branchville Fire Dept. found a weak EF0 tornado intermittently touched down taking topsout of a few trees near the intersections of Prospect and School House roads and near the intersection of Banburry and SchoolHouse roads. Trees were also uprooted on School House road between Prospect and Banburry roads and a couple of other treeswere down on Hwy 78 southeast of Branchville near the county line.Scattered severe thunderstorms produced some wind damage around the county warning area. Heavy rains if Fairfield countyalso sent some streams over their banks causing minor flooding of low lying areas.Fairfield County3 NNE Ft Wagener 12 1712EST1714EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Mr. Coleman reported a couple of trees down on Fort Wagner road.Isolated severe thunderstorms developed over portions of the upstate and northern midlands doing some wind damage...mostlytaking trees down. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Richland CountyBlythewood 13 1710EST1712EST 0 0 0.00K 0.00K Hail (0.75)Public reported penny size hail in Blythewood.383

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, CentralRichland County2 NE Oak Grove 13 1725EST1729EST 0 0 8.00K 0.00K Thunderstorm Wind (60EG)Sumter County1 S Horatio3 WNW PrivateerTrained spotter reported numerous trees down in his yard...along with numerous pine tree topped off near the intersection ofWinnsboro road and Sherrill road.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.13 1751EST1753EST 0 0 8.00K 0.00K Thunderstorm Wind (60EG)Sheriff reported numerous trees down northwest to southwest of Sumter. Trees were down near the community of Stateburgaround the intersection of Hwy 378 and State Hwy 261. Other trees were down near Nettles and Ramsey roads.Widely scattered severe thunderstorms produced some hail and microburst over the Midlands. No damage to structuresoccured. Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Lexington County1 ENE Lexington 17 1745EST1749EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Tree down on Cherokee Trail near Northwood Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lexington County4 WSW Providence 17 1745EST1749EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Trees down on Beechwoods Drive near Hallmark Drive.Isolated severe thunderstorms occurred around the central midlands producing locally heavy rains and a couple of microburststhat took down trees. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Aiken County5 SE Monetta 18 1658EST1702EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Public reported several trees down along Peach Cider road and Fallow road southeast of Monetta.Aiken County3 ESE Perry8 ESE SalleyNote: The estimated wind gust of 50 knots is equivalent to 58 mph.18 1735EST1740EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Public reported several tree down along John Nunn Hwy and Juniper Street.Richland CountyColumbia1 WNW Woodland TerraceNote: The estimated wind gust of 50 knots is equivalent to 58 mph.18 1900EST2100EST 0 0 22.00K 0.00K Flash FloodUSGS and City Police reported flooding in downtown Columbia in the Five Points area and also the USC campus near Mainand Whaley streets. Water levels were up to 4 feet deep in some areas and spilled over into some apartments and alsoWalgreens in Five Points. The Rocky Branch Creek gage crested at 10.7 feet which is 3.5 feet above flood stage. Severalvehicles became trapped when they tried to drive through the area.Orangeburg County2 WSW Branchville 18 1914EST1916EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)County Dispatch reported power lines down in the Farrell Crossroads Community near the Edisto River.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.384

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, CentralOrangeburg CountyBranchville 18 1925EST1927EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Sheriff reported several trees down in Branchville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clarendon County1 NE Halleytown 18 2011EST2016EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Highway Patrol and DOT reported several trees down along I-95 and Hwy 301 southwest of Manning.Scattered severe thunderstorms took down some trees with microbursts and also produced flash flooding in Columbia. Heavyrains also produced flooding in some low lying areas around the Midlands. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.Chesterfield County1 WSW Patrick 19 2104EST2106EST 0 0 0.30K 0.00K Thunderstorm Wind (50EG)Sherrif dispatch reported a tree down on the southbound lane of HWY 1 near BBB Circle.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chesterfield County4 SSW Rivers 19 2105EST2107EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Sheriff dispatch reported trees down at HWY102 near Bear Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chesterfield County2 SSW Thompson 19 2105EST2107EST 0 0 0.30K 0.00K Thunderstorm Wind (50EG)Sheriff dispatch reported a tree down on the roadway at W. Market Street and Teals Mill Road.Chesterfield County3 N Ruby3 NNE Mt CroghanNote: The estimated wind gust of 50 knots is equivalent to 58 mph.19202300EST0000EST 0 0 2.00K 0.00K Flash FloodPublic and Sherrif reported several streams over their banks and several secondary roads temporarily closing some.Isolated severe thunderstorms took down some trees in Chesterfield count and produces 3 to 5 inches of rain within a couple ofhours to send many streams over their banks in the north central portions of the county.SOUTH CAROLINA, North CoastalHorry CountyJamestown 06 1615EST1616EST 0 0 6.00K 0.00K Thunderstorm Wind (52EG)Trees were reported down along Janette Street and 4th Avenue. The time of occurrence was estimated based on radar data.A weak cold front extended across central North Carolina into western South Carolina during the afternoon. A series of weakupper level disturbances provided the lift for convection. Along and south of this boundary, the air mass was very unstable.Thunderstorms organized into short line segments with surface-based CAPE values of 2000-3000 J/kg. Note: The estimatedwind gust of 52 knots is equivalent to 60 mph.Horry County1 ESE Jaluco 13 1544EST1545EST 0 0 0.00K 0.00K Hail (0.75)Small hail fell along Carolina Forest Boulevard. The public report was relayed through local television media.385

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, North CoastalNumerous thunderstorms developed in the heat and humidity of the afternoon. There were no reports of severe weather.Horry CountyLongs 19 1330EST 0 0 10.00K 0.00K LightningLightning struck the roof of a home in the community of Long Bay, knocking out a one square foot section of the roof.Lightning struck a house in the community of Long Bay, causing damage.Georgetown County2 NE Union Xrds 26 1543EST1544EST 0 0 1.00K 0.00K Hail (1.00)Hail up to 1 inch in diameter was measured. The hail covered the ground.Williamsburg County3 NNE Hopewell 26 1546EST1547EST 0 0 3.00K 0.00K Hail (1.75)Golf ball size hail was reported by a motorist driving along County Line Road. The hail did result in dents to the vehicle.The seabreeze collided with a convective outflow boundary during the afternoon. This collision enhanced the lift. One largethunderstorm at the intersection of these two boundaries did produce golf ball size hail.SOUTH CAROLINA, NorthwestGreenwood County1 N Callison2 E Kirksey03 0541EST0700EST 0 0 0.00K 0.00K Flash FloodHighway 25 was flooded by Cuffytown Creek, and Bowie Rd and Bethel Rd were flooded by Beaverdam Creek after as muchas 6 inches of rain fell over a few hours time across the extreme southern part of the county.A small area of nearly stationary strong thunderstorms developed during the early morning hours over the southern part ofUpstate South Carolina. Several inches of rain fell over southern Greenwood County, which caused localized flash flooding.Greenville CountyCaesars Head 05 1235EST 0 0 Thunderstorm Wind (50EG)Several large tree limbs were blown down at Caesars Head State Park.Spartanburg County1 S Mayo1 ESE ChesneeNote: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1645EST1700EST 0 0 Thunderstorm Wind (60EG)Multiple trees were blown down near the intersection of highway 221 and Skyline Dr, with other trees down on Henderson HillRd, Mossburg Rd, and on Pickens St and South Alabama Ave in the city. Some damage was done to the athletics facilities atChesnee High School (on Alabama Ave), where a dugout was destroyed and some stadium lights were twisted.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.York County5 ESE Bowling Green 05 1833EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on highway 557 just before Cross Rd, about 5 miles east of Clover.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.386

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, NorthwestYork County3 SW Tirzah 05 1833EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on highway 5 just before Park Place, about 3 miles east of York.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chester CountyChester 05 1940EST 0 0 Thunderstorm Wind (50EG)Trees were blown down on the east side of Chester, including on Hardin St and Beltline Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickens County1 E Clemson 05 2004EST 0 0 Thunderstorm Wind (55EG)Numerous trees were blown down in and around Clemson.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Chester CountyGreat Falls 05 2030EST 0 0 Thunderstorm Wind (50EG)A tree was blown down on Wilson Ave and another was downed on Chester Ave.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickens County1 WNW Liberty 05 2035EST 0 0 Thunderstorm Wind (50EG)Large tree limbs were blown down on Peachtree St and on Campground Rd in and around Liberty.Thunderstorms developed over the South Carolina Mountains, then moved southward into the Upstate during the afternoonhours. Some of the storms produced damaging winds. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Oconee County3 NNE Tamassee 06 1320EST 0 0 Thunderstorm Wind (50EG)Oconee County1 W Walhalla1 SW West UnionSeveral trees were blown down along Little River Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.06 1433EST1435EST 0 0 Thunderstorm Wind (55EG)Multiple trees and power lines were blown down from the west side of Walhalla to the downtown area. One tree was blownonto a home near Muller Rd and Coffee Rd.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Abbeville County2 NNE Abbeyville Davis Arp 06 1525EST 0 0 Thunderstorm Wind (50EG)Trees were blown down on highway 72 just east of Abbeville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Laurens County2 S Joanna 06 1555EST 0 0 Thunderstorm Wind (50EG)Several large tree limbs were blown down about 2 miles south of the town of Joanna.A cold front moved across the western Carolinas during the afternoon hours. The front triggered thunderstorms over thesouthern mountains of North Carolina which then moved into the Upstate. Some of the storms produced areas of damagingwind. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickens County1 SE Easley 12 1405EST 0 0 Thunderstorm Wind (50EG)A few trees were blown down in the Easley area, with some on power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.387

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, NorthwestPickens County2 NE Cateechee 12 1440EST 0 0 Thunderstorm Wind (50EG)A few trees and power lines were blown down west of Liberty, including along Golden Creek Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pickens County4 SSW Nine Times 12 1500EST 0 0 Hail (0.75)Spartanburg County1 NE Landrum 12 1502EST 0 0 Thunderstorm Wind (50EG)Two large tree limbs were blown down near the Polk County line.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Spartanburg County1 E Woodruff 12 1515EST 0 0 Thunderstorm Wind (50EG)A few trees were blown down on the east side of Woodruff, including on Cavins Rd and on Varner Rd. One tree fell on ahouse.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greenville County3 NE Fork Shoals 12 1530EST 0 0 Thunderstorm Wind (50EG)Two trees were blown down at the intersection of Fairview Rd and Tall Pines Rd.Chester County4 NNW Wilksburg3 W LowrysNote: The estimated wind gust of 50 knots is equivalent to 58 mph.12 1546EST1600EST 0 0 Thunderstorm Wind (50EG)Trees were blown down on highway 49, about 10 miles west of Lowrys, as well as on Center Rd, and on Poplar Springs Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chester County4 S Sandy River 12 1640EST 0 0 Thunderstorm Wind (50EG)Trees were blown down along Stone Rd about 9 miles southwest of Chester.Scattered thunderstorms developed over the southern North Carolina mountains, then moved southward into the Upstate wherethey increased in coverage and intensity, producing some pulse severe wind damage. Note: The estimated wind gust of 50knots is equivalent to 58 mph.Greenville County3 E Cherokee Forest 14 1930EST2130EST 0 0 0.00K 0.00K Flash FloodBoiling Springs Rd was closed at the bridge over Brushy Creek, with about a foot of water running over one side of the bridge.A stationary area of thunderstorms produced heavy rain over the central Upstate of South Carolina, resulting in a small area offlash flooding over Greenville County.Greenville County1 WSW Judson 26 1858EST 0 0 Hail (0.88)Nickel size hail fell near the intersection of Anderson Rd and White Horse Rd.Greenville County1 W Berea 26 1900EST 0 0 Thunderstorm Wind (50EG)Two trees were blown down on Haynesworth Rd, about 4 miles northwest of downtown Greenville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.388

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, NorthwestGreenville County1 ENE Five Forks 26 1904EST 0 0 Hail (0.75)Greenville County2 NW Gaylord Xrds 26 1910EST 0 0 Thunderstorm Wind (50EG)Trees were blown down on Scuffletown Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greenville County1 NNW Gaylord Xrds 26 1912EST 0 0 Hail (1.00)Scattered thunderstorms developed over the southern Appalachian Mountains, then drifted into the Upstate where theyproduced some hail and a few areas of damaging wind.York County2 ESE Sharon 27 0100EST 0 0 20.00K Thunderstorm Wind (60EG)Multiple large trees were uprooted and others snapped near the intersection of Hord Rd and Old Pinckney Rd. One tree fell onand significantly damaged a home.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.York County2 ESE Sharon 27 0104EST 0 0 Hail (0.88)SOUTH CAROLINA, South CoastalScattered thunderstorms developed during the early morning hours over the northwest piedmont of South Carolina. One of thestorms produced a microburst over York County.Berkeley County1 ENE North Mulberry 06 1410EST1411EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement reported a tree down on Vandross Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Berkeley CountyGoose Creek 06 1610EST1611EST 0 0 0.00K 0.00K Funnel CloudThe broadcast media relayed a report of a funnel cloud from a viewer in Goose Creek.Charleston County1 E Pinecrest 06 1630EST1631EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement reported a tree down at the intersection of Betsy Road and Sanford Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charleston County1 SSE (CHS)Charleston Afb 06 1644EST1645EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A National Weather Service employee reported several large branches blown down along Aviation Avenue near the FAA towerentrance.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charleston CountyCharleston Hgts 06 1650EST1651EST 0 0 0.00K 0.00K Hail (0.88)A emergency manager reported nickel size hail near the Interstate 26 and Interstate 526 interchange.389

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, South CoastalCharleston County1 NW Bennett 06 1657EST1658EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)An off duty National Weather Service employee reported a tree down on the ramp at exit 17 on Interstate 526.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charleston County1 W (CHS)Charleston Afb 06 1657EST1658EST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)The Charleston International Airport ASOS measured a wind gust of 61 miles per hour.Note: The measured wind gust of 53 knots is equivalent to 61 mph.Dorchester County8 SE Slandsville 06 1715EST1716EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A sheriff department reported a tree down across Highway 61 near Middleton Place.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Allendale County2 NNE Seigling 06 1838EST1839EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement reported a tree down on Highway 278 near Concord Church Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Berkeley County3 SSE Pigeon Bay 06 1838EST1839EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported a couple trees and several large limbs down along Mudville Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Colleton County3 S Bells Xrds 06 1858EST1859EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)The county dispatch reported a tree down on Hudson Mill Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Colleton County4 E Sniders Xrds 06 1922EST1923EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)The county dispatch reported a tree down near the 500 block of Rentz Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Colleton County2 ESE Hendersonville 06 1949EST1950EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)The county dispatch reported a tree down near the intersection of Ritter Road and Bluehouse Crossing.Widespread surface heating and continued deep moisture advection ahead of an approaching cold front from the northwestallowed for very unstable atmospheric conditions with CAPE values between 3500 to 4000 J/kg Friday afternoon and evening.As a 500 mb shortwave tracked along the southern periphery of a broad through and across the region, severe thunderstormsdeveloped across the area. Severe thunderstorms initially developed along the seabreeze in the Charleston area late in theafternoon. More organized severe storms tracked into the area from the Midlands during the evening and pushed all the way tothe coast, with the strongest storms across southeast South Carolina. Note: The estimated wind gust of 50 knots is equivalent to58 mph.390

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, South CoastalBerkeley CountyGoose Creek 13 1720EST1721EST 0 0 Thunderstorm Wind (61EG)Law enforcement estimated 60 to 70 mph winds in Goose Creek.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Charleston CountyCharleston Hgts 13 1720EST1721EST 0 0 0.75K 0.00K Thunderstorm Wind (50EG)The public reported 2 inch diameter limbs down in North Charleston.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charleston CountyCharleston Hgts 13 1724EST1725EST 0 0 0.00K Thunderstorm Wind (50EG)A trained spotter reported a railroad cross arm bent over the catwalk that goes across the tracks.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charleston CountyCharleston Hgts 13 1724EST1725EST 0 0 Thunderstorm Wind (52EG)A spotter estimated 60 mph gusts near the intersection of Ashley Phosphate Road and Rivers Avenue.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Berkeley County2 NNE The Farms 13 1727EST1728EST 0 0 7.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported privacy fences blown down in various yards. The spotter also reported several trees blown downacross parts of Foster Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Berkeley County2 S Inness 13 1730EST1731EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)The public reported several trees down and on roads in the Harbor Lakes Subdivision area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charleston CountyCharleston Hgts 13 1734EST1735EST 0 0 0.25K 0.00K Thunderstorm Wind (50EG)A spotter reported 2 inch diameter limbs down near the intersection of Ashley Phosphate Road and Rivers Avenue.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Berkeley County1 S Goose Creek 13 1735EST1736EST 0 0 2.50K 0.00K Thunderstorm Wind (50EG)The public reported several 3 to 4 inch diameter limbs down near Otranto South Carolina.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.391

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH CAROLINA, South CoastalCharleston County1 SSE Deer Park 13 1800EST1801EST 0 0 10.00K 0.00K Heavy RainLocal media reported a 73 year old woman drowned after she drove off a parking lot into a retention pond. Witnesses say shecould not see the sharp drop-off from the parking lot to the retention pond due to heavy rain at the time. The woman wastransported to Roper Hospital where she was pronounced dead due to drowning.Dorchester County7 SSW Givhans 13 1815EST1816EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Charleston County1 SE The Groves1 NNW SnowdenLaw enforcement reported a tree down on Jelico Court.A hot and humid air mass created surface based CAPE values near 4500 J/kg and lifted indices near -8 during peak heatinghours. Thunderstorms initiated during the evening hours as a stationary front just to the north of the county warning areainteracted with a sea breeze. Numerous outflow boundaries from initial thunderstorm activity produced additionalthunderstorms through the early overnight hours. Some thunderstorms produced damaging winds and heavy rainfall. Note: Theestimated wind gust of 50 knots is equivalent to 58 mph.15 1025EST1125EST 0 0 1.00K 0.00K Flash FloodLaw enforcement reported street flooding on Long Point Road near Boone Hall and on Coleman Blvd near the Moultrie MiddleSchool. Police were standing by to block both areas. Firefighters were also standing by water that was entering a residence at526 Whilden Street.Charleston County1 SE The Groves1 NE Mt Pleasant15 1112EST1145EST 0 0 2.50K 0.00K Flash FloodLaw enforcement reported water entering the crawl space of a residence at 1261 Mathis Ferry Road.Deep tropical moisture was present over South Carolina as an area of low pressure remained west of the county warning areawith a weak surface front extending east along the Savannah River. Precipitable water values approached 2.5 inches as tropicalmoisture continued to advect over the region from the south during the late morning into early afternoon hours. As an earlyafternoon sea breeze developed, high precipitable water values contributed to several showers and thunderstorms that producedheavy rainfall.Charleston County1 S Citadel 20 1600EST1720EST 0 0 0.00K 0.00K Flash FloodAn employee of M.U.S.C. reported a road closure due to flooding near the intersection of Ashley Avenue and Doughty Street.Beaufort County4 S Baileys Lndg 20 1638EST1639EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement reported a tree down and was blocking Pinckney Colony Road near the Fording Island Road intersection.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Beaufort County2 NNE Bluffton 20 1645EST1646EST 0 0 5.00K 0.00K LightningLightning caused a fire at the Golden Corral in Bluffton, South Carolina. Firefighters found smoke and flames coming from theroof. The fire was quickly extinguished.A backdoor cold front moved in from the north over portions of southeast South Carolina. This provided enhanced lift in a verymoist and unstable atmosphere over the forecast area. As thunderstorms developed they became clustered and pulsed toproduce isolated severe winds. Heavy rains fell in and around the Charleston metro near high tide, thus enhancing flooding toprone locations.392

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, Central and NorthBrown County5 NW Hecla3 NE Ordway01310000CST2359CST 0 0 0.00K 0.00K FloodSpink County3 ENE Duxbury1 SE Ashton01310000CST2359CST 0 0 0.00K 0.00K FloodThe James River receded and went below flood stage at both Ashton and Columbia in August. The river remained above floodstage at Stratford throughout the month. Ashton went below flood stage on the 14th while Columbia went below flood stage onthe 25th. A few roads along with some agricultural land remained flooded.Day County4 SW Webster Muni Arpt 01 0430CST 0 0 Hail (1.00)Day County9 SSE Webster Muni Arpt 01 0450CST 0 0 Hail (2.50)Hyde County4 NE Highmore Arpt 01 1655CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated by the public.A couple isolated severe thunderstorms brought hail up to the size of tennis balls along with sixty mph winds to parts of centraland northeast South Dakota. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Corson County11 S Bullhead 02 0150MST 0 0 Thunderstorm Wind (76MG)An isolated supercell thunderstorm brought nearly 90 mph winds in the early morning hours south of Bullhead. Note: Themeasured wind gust of 76 knots is equivalent to 87 mph.Stanley County1 N Bunker 03 1520MST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated in Bunker.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jones County1 E Murdo Muni Arpt 03 1634CST 0 0 Hail (1.00)Jones County1 E Murdo Muni Arpt 03 1634CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were reported with quarter size hail.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lyman County1 E Kennebec 03 1810CST 0 0 Thunderstorm Wind (54MG)Note: The measured wind gust of 54 knots is equivalent to 62 mph.Lyman County5 SSW Reliance Arpt 03 1840CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated south of Reliance.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Buffalo County6 WNW Gann Vly 03 1855CST 0 0 Hail (0.88)Buffalo County1 E Gann Vly 03 1920CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated in Gann Valley.Several thunderstorms brought sixty mph winds or higher along with large hail to parts of central South Dakota. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.393

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, Central and NorthDeuel County4 NNE Moritz 07 0320CST 0 0 Hail (1.00)A severe thunderstorm brought large hail to the northeast of Altamont in Deuel county.Campbell CountyPollock 11 2335CST 0 0 Hail (1.00)A severe thunderstorm brought quarter size hail to near Pollock in north central South Dakota.Grant County2 S Big Stone City 12 1600CST1630CST 0 0 Hail (1.00)Grant County1 S Big Stone City 12 1600CST1610CST 0 0 Hail (1.25)Grant County1 SE Milbank 12 1605CST1620CST 0 0 Hail (1.00)Grant County1 WSW Milbank Arpt 12 1615CST1645CST 0 0 Hail (1.00)Grant County4 S Milbank Arpt 12 1625CST 0 0 0.00K 0.00K Funnel CloudGrant County2 E Milbank Arpt 12 1630CST1650CST 0 0 Hail (1.25)Grant County1 ENE Milbank Arpt 12 1630CST1640CST 0 0 Hail (1.00)Grant County2 S Milbank 12 1635CST1645CST 0 0 Hail (1.00)Grant County3 S Big Stone City 12 1640CST1644CST 0 0 Hail (1.50)Grant County3 ENE Milbank Arpt 12 1645CST1648CST 0 0 Hail (1.75)Large hail up to the size of golfballs along with a funnel cloud dropped from a supercell thunderstorm near Milbank and BigStone City.Corson County10 ENE Athboy 12 2035MST 0 0 Thunderstorm Wind (56EG)Sixty-five mph winds were estimated northwest of Isabel.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.394

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, Central and NorthCorson County11 S Bullhead 12 2100MST 0 0 Thunderstorm Wind (60MG)Note: The measured wind gust of 60 knots is equivalent to 69 mph.Corson County1 SE Mc Laughlin 12 2140MST 0 0 Thunderstorm Wind (61EG)Seventy mph winds were estimated in McLaughlin.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Corson County1 NE Little Eagle 12 2158MST 0 0 Thunderstorm Wind (56MG)Severe thunderstorms brought wind gusts to near 70 mph in Corson county. Note: The measured wind gust of 56 knots isequivalent to 64 mph.SDZ003Corson13 0010CST 0 0 High WindHigh winds gusting to 74 mph occurred behind exiting thunderstorms to the east. No damage was reported.Brown County2 NE Richmond 30 1518CST 0 0 Thunderstorm Wind (61EG)Seventy mph winds blew out several windows in the house.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Brown County2 NW Westport 30 1526CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated northwest of Westport.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Brown County1 SE Aberdeen 30 1602CST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Brown CountyBath 30 1610CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated in Bath.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Brown County4 SSE Richmond 30 1615CST 0 0 Thunderstorm Wind (61EG)Seventy mph winds blew out a window in the house.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Brown County2 NE Barnard 30 1640CST 0 0 Thunderstorm Wind (61EG)Seventy mph winds took the roof off of a shed and tipped an auger over.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Marshall CountyLangford 30 1640CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated in Langford.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Clark County2 NNW Crocker 30 1645CST 0 0 Thunderstorm Wind (61EG)Seventy mph winds brought several large tree branches down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.395

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, Central and NorthClark County2 W Clark 30 1700CST 0 1 Thunderstorm Wind (61EG)Seventy mph winds blew a semi off of Highway 212. The semi suffered extensive damage with the driver receiving minorinjuries.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Day County3 S Webster Muni Arpt 30 1725CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated south of Webster.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Roberts County2 W Summit 30 1755CST 0 0 Thunderstorm Wind (52EG)Sixty mph winds were estimated west of Summit.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Hamlin County1 N Estelline Muni Arpt 30 1915CST 0 0 Thunderstorm Wind (61EG)Seventy mph winds downed several large evergreen trees along with many large tree branches in Estelline.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Deuel CountyClear Lake Muni Arpt 30 1945CST 0 0 Thunderstorm Wind (61EG)SOUTH DAKOTA, SoutheastBeadle County3 E Hitchcock 0110Seventy mph winds brought down some trees and several branches in Clear Lake.A line of thunderstorms brought damaging wind gusts up to 70 mph to parts of northeast South Dakota. Several trees wereuprooted along with several structures sustaining some damage. Note: The estimated wind gust of 61 knots is equivalent to 70mph.0000CST1800CST 0 0 0.00K 0.00K FloodModerate to major flooding along the James River continued into the start of August, but the river fell steadily after the firstcouple of days, falling below flood stage at Huron on August 10th. Flooding abated quickly on affected roads, and more slowlyon fields.Davison County8 NNW Mitchell 01310000CST2359CST 0 0 0.00K 0.00K FloodModerate to major flooding along the James River continued into the start of August. The river was at its highest levels duringthe first few days of the month, although it remained below its spring crest at Mitchell. The river then fell slowly. Flooding offields and some roads slowly abated.Hanson County1 N Riverside9 S Alexandria01310000CST2359CST 0 0 0.00K 0.00K FloodModerate to major flooding along the James River continued into the start of August. The river was at its highest levels duringthe first few days of the month, although it remained below its peak spring levels. The river then fell slowly. Flooding of fieldsand some roads slowly abated.Hutchinson County6 NW Milltown3 E Kaylor01310000CST2359CST 0 0 0.00K 0.00K FloodModerate to major flooding along the James River continued into the start of August. The river was at its highest levels duringthe first few days of the month, although it remained below its peak spring levels near Scotland. The river then fell slowly.Flooding of fields and some roads slowly abated.396

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, SoutheastSanborn County10 N Forestburg 01120000CST1800CST 0 0 0.00K 0.00K FloodModerate to major flooding along the James River continued into the start of August, but the river fell steadily after the firstfew days, falling below flood stage at Forestburg on August 19th. Flooding of fields and some roads abated steadily.Yankton County9 NNW Lesterville3 E Yankton01310000CST2359CST 0 0 0.00K 0.00K FloodModerate to major flooding along the James River continued into the start of August. The river was at its highest levels duringthe first few days of the month, although it remained below its peak spring levels near Scotland. The river then fell slowly.Flooding of fields and some roads slowly abated.Flooding of the James River, which began in March from snowmelt, continued in August, but ended during the month over partof the river. Heavy rain kept river levels generally steady for a while in early August, but otherwise water levels on the riverslowly fell.Lincoln County3 W Sioux Falls 01030000CST1800CST 0 0 0.00K 0.00K FloodMinor to moderate flooding along the Big Sioux River continued at the start of August after late July heavy rains, but theflooding abated after a few days. Farmland and other lowlands were flooded. The highest level near Hawarden, Iowa was 5 feetabove flood stage on August 1st.Minnehaha County8 NNW Sioux Falls 01030000CST0600CST 0 0 0.00K 0.00K FloodMinor flooding along the Big Sioux River continued at the start of August after late July heavy rains, but the flooding abatedafter a few days. A few lowlands including some parkland were flooded.Union County8 ENE Alcester3 SE Jefferson01070000CST1800CST 0 0 0.00K 0.00K FloodMinor to moderate flooding along the Big Sioux River continued at the start of August after late July heavy rains, but theflooding abated after a few days. Farmland and other lowlands were flooded. The highest level near Akron, Iowa was 4.54 feetabove flood stage on August 1st.Flooding along the Big Sioux River continued in early August from heavy rains at the end of July, but the flooding endedduring the first half of the month.Clay County4 N Wakonda9 NNE Hub City01150000CST1800CST 0 0 0.00K 0.00K FloodModerate flooding of the Vermillion River, triggered by late July heavy rains, continued into early August before abating.Lowlands, farmland, and a few roads were flooded. The river crested at 3.55 feet above flood stage near Wakonda on August4th, then fell below flood stage on August 15th.Mccook County5 NW Salem5 ENE Montrose01100000CST1800CST 0 0 0.00K 0.00K FloodModerate to major flooding of the East and West Fork Vermillion Rivers, and the Little Vermillion River, triggered by late Julyheavy rains, continued into early August before abating. Flooding of fields, lowlands, and parks continued, then steadily abated.The most extensive flooding, reported in the Montrose area, peaked at the start of the month. Parks and campgrounds in thisarea were affected.Turner County1 W Dolton 01120000CST1800CST 0 0 0.00K 0.00K Flood397

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, SoutheastModerate to major flooding of the Vermillion River, as well as the East and West Fork Vermillion Rivers, triggered by late Julyheavy rains, continued into early August before abating. Lowlands, fields, and some roads were flooded. The Vermillion Rivercrested at 4.6 feet above flood stage near Davis on August 7th, then water levels steadily decreased, with the river falling belowflood stage on August 12th. The East and West Fork Vermillion Rivers were already falling at the start of the month and fellbelow flood stage a few days later.Moderate to major flooding of the Vermillion River, the East and West Fork Vermillion Rivers, and the Little VermillionRiver, caused by late July heavy rains, continued through early August, ending by the middle of the month.Davison County5 WNW Mt Vernon 01070000CST1800CST 0 0 0.00K 0.00K FloodFlooding of Firesteel Creek continued from late July. The water level fell steadily from a near record 8 feet above flood stageon July 31st, to below flood stage on July 7th. Flooding of lowlands and roads quickly abated.Flooding of Firesteel Creek, triggered by late July heavy rains, continued during the first week of August.Bon Homme County1 N Springfield 01310000CST2359CST 0 0 0.00K 0.00K FloodRunoff from heavy rain during the summer helped continue minor flooding along the Missouri River.Brule County2 NNE Chamberlain 01310000CST2359CST 0 0 0.00K 0.00K FloodRunoff from heavy rain during the summer helped continue flooding along the Missouri River. Lowlands flooded includedsome camping and other recreational facilities. The river remained below its June crest at Chamberlain.Runoff from summer heavy rains continued minor flooding along the Missouri River near Chamberlain, and also in a bend ofthe river from Springfield south and southwest. The flooding continued through the month.Minnehaha County2 SW Brandon1 S East Sioux Falls02 0540CST0830CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flooding of several streets in Sioux Falls, including Bahnson Avenue near 12th Street.Lincoln County3 SW Sioux Falls3 NE ShindlerBon Homme County12 NNE Avon10 W Scotland02 0630CST0830CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding of several roads.02 0700CST0900CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding of several rural roads, some of which became completely under water in stretches.Heavy rain from thunderstorms caused flash flooding in the Sioux Falls area and in Bon Homme County during the morning ofAugust 2nd.Hanson County6 ENE Plano 03 1757CST1758CST 0.43 50 0 0 0.00K 0.00K Tornado (EF0)A brief tornado near the county line raised dust, but caused no reported damage. The tornado crossed briefly into Miner Countybefore dissipating.398

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, SoutheastMiner County8 W Epiphany 03 1758CST1759CST 0.43 50 0 0 0.00K 0.00K Tornado (EF0)A brief tornado caused no reported damage. The tornado crossed into Miner County from Hanson County before quicklydissipating.Brule County4 ENE Pukwana 03 1910CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jerauld County7 NNW Crow Lake 03 1945CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jerauld County3 NW Wessington Spgs 03 2000CST2200CST 0 0 0.00K 0.00K Flash FloodHeavy rain from thunderstorms caused flash flooding of several streets in the town of Wessington Springs.Aurora County4 S Storla 03 2010CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Aurora County3 NW Storla 03 2015CST 0 0 0.00K 0.00K Heavy RainDavison County1 SW Mt Vernon 03 2020CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Minnehaha County2 SW West Sioux Falls2 NE Sioux FallsThunderstorm winds caused minor tree damage.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.03 2130CST2359CST 0 0 0.00K 0.00K Flash FloodHeavy rain from thunderstorms produced flash flooding of several streets in Sioux Falls, with several vehicles stalled.Thunderstorms produced a tornado, damaging winds, and flash flooding in southeast South Dakota, mostly near Interstate 90,during the evening of August 3rd.Charles Mix County2 NE Wagner 08 1532CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Bon Homme County5 NNW Perkins 08 1600CST 0 0 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused an unknown amount of damage to trees and power lines.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.399

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, SoutheastBon Homme CountyAvon 08 1600CST 0 0 40.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds caused widespread damage to trees and power lines. The tree damage included large trees uprooted orblown down, and at least two houses were damaged by falling trees. The damage to power lines caused a power outage over thetown which lasted about 5 hours. The winds also destroyed a large shed and damaged a camper parked in the shed.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Bon Homme CountyTyndall 08 1605CST 0 0 30.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds caused tree damage, including large trees blown down. The winds also blew down power lines, damagedseveral small sheds, and tore shingles off roofs.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Bon Homme County7 NNW Tabor 08 1610CST 0 0 0.00K 0.00K Thunderstorm Wind (63MG)Thunderstorm winds caused tree damage, including numerous branches blown down.Note: The measured wind gust of 63 knots is equivalent to 72 mph.Yankton County5 SW Napa 08 1615CST 0 0 50.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds overturned several campers and caused widespread tree damage, including large trees blown down at aLewis and Clark Lake campground. A fee collector was injured by tree debris..Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Bon Homme County2 NNW Avon 08 1626CST1800CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding of low lying yards and streets.Yankton County2 SSW (YKN)Chan Gurney Arp 08 1635CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Yankton County2 W Irene 08 1650CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Yankton CountyNapa2 E (YKN)Chan Gurney Arp08 1652CST 0 0 0.00K 0.00K Flash FloodHeavy rainfall of up to 3 inches in a short time caused flash flooding of streets, ditches, and other low areas.Thunderstorms produced damaging winds and flash flooding from heavy rain along and near the Missouri River in southeastSouth Dakota during the late afternoon of August 8th.Charles Mix County1 E Lake Andes 10 0215CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused widespread tree damage, including large limbs blown down. A car window was smashed by onefalling limb. The winds also blew down power lines, causing a power outage.A thunderstorm produced strong winds which damaged trees, power lines, and a vehicle in Lake Andes during the predawnhours of August 10th. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.400

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, SoutheastMinnehaha County1 W Sioux Falls3 WNW East Sioux Falls10 0341CST0530CST 0 0 0.00K 0.00K Flash FloodHeavy rain from thunderstorms caused flash flooding of several streets in Sioux Falls.Thunderstorms produced heavy rain which caused flash flooding of streets in Sioux Falls during the predawn hours of August10th.Turner County1 N Monroe 12 1505CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Minnehaha County6 ESE Pumpkin Center 12 1531CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Minnehaha County1 SSE Crooks 12 1540CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including a large tree blown down and blocking a highway.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Minnehaha County2 N Ellis 12 1540CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew down power lines and caused tree damage.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Minnehaha County1 SE Crooks 12 1542CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including a one foot diameter tree split.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Minnehaha County1 SW Garretson 12 1550CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Minnehaha CountyGarretson 12 1550CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew the roof off a barn.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Minnehaha County6 SE Dell Rapids Arpt 12 1552CST 0 0 0.00K 0.00K Thunderstorm Wind (63MG)Thunderstorm winds caused tree damage.Note: The measured wind gust of 63 knots is equivalent to 72 mph.Minnehaha County1 S Sherman 12 1555CST 0 0 4.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds blew down power lines.Thunderstorms produced damaging winds in part of southeast South Dakota, near but not including Sioux Falls, during theafternoon of August 12th. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.401

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, SoutheastGregory County1 E Fairfax 19 1910CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Charles Mix CountyWagner 19 1915CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew down power poles and lines.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Charles Mix County4 N Lake Andes 19 1915CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including branches blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Douglas County1 W Corsica 19 1927CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew down branches from several trees.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Davison County1 NE Mt Vernon 19 1950CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused scattered tree damage. The winds were accompanied by very heavy rain.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Davison County1 NW Mitchell 19 1959CST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Hanson County5 WNW Rockport 19 2003CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew the roof off a hog barn.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hutchinson County1 N Menno 19 2020CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several small branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lake County1 E Ramona 19 2042CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including several trees snapped off.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Minnehaha County1 N Sioux Falls 19 2118CST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Brookings County1 SW Brookings 19 2131CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds caused widespread tree damage, including some trees over 3 feet in diameter blown down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.402

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, SoutheastBrookings County(BKX)Brookings Muni 19 2131CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)Note: The measured wind gust of 51 knots is equivalent to 59 mph.Brookings County1 SW Brookings 19 2135CST 0 0 0.00K 0.00K Hail (1.00)Thunderstorms produced damaging winds at several locations along a long path from Gregory to Brookings Counties insoutheast South Dakota during the evening of August 19th. There was also one report of marginally large hail.Gregory County8 ESE Carlock 30 1620CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds caused tree damage, including large branches blown down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Gregory County1 W Herrick 30 1646CST 0 0 0.00K 0.00K Hail (1.00)Gregory County1 W Herrick 30 1648CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including up to 5 inch diameter branches blown down. The winds also blew a tin partof a roof off a house, and blew a hay bale across a road.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Charles Mix County4 SSE Academy 30 1655CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Charles Mix County3 NNE Academy 30 1705CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew a wagon into a home, damaging the home. The winds also blew a door off a barn.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Davison County7 NNW Mt Vernon 30 1712CST 0 0 0.00K 0.00K Hail (1.00)Large hail was accompanied by damaging winds.Davison County7 NNW Mt Vernon 30 1712CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds caused tree damage. The winds were accompanied by quarter size hail.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Sanborn County3 WSW Letcher 30 1720CST 0 0 25.00K 0.00K Thunderstorm Wind (70EG)Thunderstorm winds destroyed 5 grain bins and caused extensive tree damage. Trees up to 3 feet in diameter were uprooted.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Charles Mix County1 E Marty 30 1738CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds blew the door off a shed and caused tree damage, including large branches blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.403

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, SoutheastSanborn County2 WSW Forestburg 30 1738CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds caused tree damage, including several large branches blown down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Charles Mix County1 W Wagner 30 1743CST 0 0 1.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds tore 15 feet of soffit from a house.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Sanborn County9 NNW Artesian 30 1746CST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds caused tree damage, including up to 12 inch diameter limbs blown down.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Bon Homme County5 SW Perkins 30 1800CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, including several branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Douglas County2 W Corsica 30 1802CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused minor tree damage.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Hutchinson County1 SW Parkston 30 1820CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds caused tree damage, with a few branches blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Kingsbury County4 NNW Oldham 30 1855CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Sanborn County2 NNE Letcher 3031Thunderstorm winds blew over a semi truck, and cause tree damage, including several trees blown down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.2140CST0015CST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding of several roads and low areas.Thunderstorms produced damaging winds over part of southeast South Dakota during the late afternoon and evening of August30th. There were also two reports of large hail and one report of flash flooding. The severe weather and flash flood reports werenear or west of the James River, except for one damaging wind report in eastern Kingsbury County.SOUTH DAKOTA, WestCuster County5 NNW Custer 01 1515MST 0 0 0.00K 0.00K Hail (1.00)Custer County5 NE Custer 01 1525MST 0 0 0.00K 0.00K Hail (0.75)A severe thunderstorm produced penny to quarter sized hail north of Custer.404

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, WestMeade County(D07)Faith Arpt 02 0007MST 0 0 0.00K 0.00K Thunderstorm Wind (65MG)Note: The measured wind gust of 65 knots is equivalent to 75 mph.Meade County(D07)Faith Arpt 02 0020MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Wind gusts to 75 mph were recorded at the Faith airport as a severe thunderstorm passed through the area. Note: The measuredwind gust of 52 knots is equivalent to 60 mph.Pennington County3 NE Silver City 02 1130MST 0 0 0.00K 0.00K Hail (0.88)Hail to the size of half dollars fell over the central Black Hills.Tripp County1 NW Wewela 02 1255CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A severe thunderstorm produced strong wind gusts near Wewela. Note: The estimated wind gust of 52 knots is equivalent to60 mph.Pennington County2 NW Rockerville 02 1314MST 0 0 0.00K 0.00K Hail (1.00)Pennington County2 NNE Rockerville 02 1324MST 0 0 0.00K 0.00K Hail (1.25)Hail to the size of half dollars fell over the central Black Hills.Jackson County1 N Longvalley 02 1355MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts were estimated at 70 mph.Wind gusts around 70 mph accompanied a severe thunderstorm near Long Valley. Note: The estimated wind gust of 61 knotsis equivalent to 70 mph.Todd County5 NNW Rosebud 02 1620CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A thunderstorm produced wind gusts around 60 mph north of Rosebud. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Harding County8 SSW Reva 02 1915MST 0 0 0.00K 0.00K Hail (0.88)Nickel sized hail fell from a thunderstorm south of Reva.Lawrence County8 W Spearfish 03 1025MST1029MST 0 0 0.00K 0.00K Hail (1.00)Lawrence County5 NW Cheyenne Crossing 03 1045MST 0 0 0.00K 0.00K Hail (1.00)Quarter sized hail fell at Savoy in Spearfish Canyon.Lawrence CountyLead 03 1100MST 0 0 300.00K 0.00K Hail (1.75)Golf ball sized hail damaged automobiles and buildings in Lead.405

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, WestLawrence CountyCentral City 03 1103MST 0 0 100.00K 0.00K Hail (1.75)Golf ball sized hail damaged automobiles and buildings in Central City.Lawrence County5 SSE Deadwood 03 1115MST1125MST 0 0 0.00K 0.00K Hail (1.25)Lawrence County2 NE Deadwood 03 1120MST1125MST 0 0 0.00K 0.00K Hail (1.00)Meade County5 NE Sturgis 03 1143MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts of 60 mph were reported at Bear Butte State Park.A cluster of severe thunderstorms developed over far northeastern Wyoming and tracked eastward across the northern BlackHills and the west central South Dakota plains. These storms produced hail to the size of golf balls, wind gusts to 70 mph, andheavy rain. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lawrence County4 SSE Spearfish Arpt2 NE Deadwood03 1145MST1345MST 0 0 250.00K 0.00K Flash FloodA strong upper level disturbance produced heavy rain around Lead, Deadwood, and Central City. Four to five inches of rain fellin two hours, causing widespread street flooding in Lead and Deadwood. Six to 12 inches of water flowing down Main andSherman Streets in Deadwood flooded cars, basements, and businesses. The electrical system of the Broadway Parking Rampelevator was destroyed. Hail broke windows of a basement pub, which then filled with water about three and a half feet deep.Meade County1 NNW Piedmont 03 1154MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Butte County3 E Vale 03 1155MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)Note: The measured wind gust of 54 knots is equivalent to 62 mph.Meade County1 S Tilford 03 1155MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts to 60 mph were estimated at the Tilford Rest Area.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Meade County5 ENE Black Hawk 03 1225MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A cluster of severe thunderstorms developed over far northeastern Wyoming and tracked eastward across the northern BlackHills and the west central South Dakota plains. These storms produced hail to the size of golf balls, wind gusts to 70 mph, andheavy rain. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fall River CountyEdgemont 03 1233MST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Strong winds downed trees and power poles in Edgemont, with electric service out for as long as 24 hours.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.406

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, WestFall River County1 WNW Edgemont 03 1235MST 0 0 0.00K 0.00K Thunderstorm Wind (69MG)Note: The measured wind gust of 69 knots is equivalent to 79 mph.Fall River CountyAngostura Reservoir 03 1300MST 0 0 2.00K 0.00K Thunderstorm Wind (61EG)Tree were uprooted and a fifth wheel camper trailer was blown over at the Hat Creek Campground.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Custer County14 E Buffalo Gap 03 1306MST 0 0 0.00K 0.00K Hail (1.00)Custer County14 E Buffalo Gap 03 1306MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Severe thunderstorms developed across southwestern South Dakota and tracked eastward into south central South Dakota.These storms produced wind gusts to 70 mph, large hail, and heavy rain. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Pennington County7 S Owanka 03 1320MST 0 0 0.00K 0.00K Hail (1.00)Pennington County7 S Owanka 03 1320MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Estimated wind gusts of 70 mph were reported.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Pennington County13 S Wall 03 1355MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts estimated at 70 mph.A cluster of severe thunderstorms developed over far northeastern Wyoming and tracked eastward across the northern BlackHills and the west central South Dakota plains. These storms produced hail to the size of golf balls, wind gusts to 70 mph, andheavy rain. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Shannon CountyKyle 03 1429MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jackson CountyInterior 03 1432MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Estimated wind gusts of 60 mph were reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Shannon County5 E Porcupine 03 1435MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts to 60 mph were reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Shannon County5 NE Porcupine 03 1440MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)Note: The measured wind gust of 54 knots is equivalent to 62 mph.Jackson CountyKadoka 03 1505MST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)Note: The measured wind gust of 55 knots is equivalent to 63 mph.407

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, WestJackson County10 N Kadoka 03 1510MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Todd County2 SW Parmelee 03 1700CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts to 60 mph were estimated.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Mellette CountyWood 03 1730CST 0 0 1.00K 0.00K Thunderstorm Wind (61EG)Large tree limbs were blown down.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Todd County2 E Okreek 03 1735CST 0 0 0.00K 0.00K Thunderstorm Wind (64MG)Note: The measured wind gust of 64 knots is equivalent to 74 mph.Mellette County6 NE Wood 03 1740CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts to 70 mph were reported.Severe thunderstorms developed across southwestern South Dakota and tracked eastward into south central South Dakota.These storms produced wind gusts to 70 mph, large hail, and heavy rain. Note: The estimated wind gust of 61 knots isequivalent to 70 mph.Harding County7 E Redig 06 1725MST1735MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Wind gusts around 60 mph accompanied a storm across southern Harding County. Note: The estimated wind gust of 52 knotsis equivalent to 60 mph.Fall River County13 NNE Ardmore 09 1235MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A severe thunderstorm produced 60 mph wind gusts north of Ardmore. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Fall River County1 NNW Ardmore 09 1304MST 0 0 0.00K 0.00K Hail (0.75)Fall River County1 NNW Ardmore 09 1304MST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)A severe thunderstorm produced penny sized hail and wind gusts over 60 mph. Note: The measured wind gust of 55 knots isequivalent to 63 mph.Custer County6 SE Fairburn 09 1320MST 0 0 0.00K 0.00K Hail (0.88)Custer County7 SSE Fairburn 09 1325MST 0 0 0.00K 0.00K Hail (0.88)Custer County7 SSE Fairburn 09 1325MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A severe thunderstorm developed south of Fairburn and produced hail to nickel size and wind gusts around 60 mph. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.408

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, WestCuster County12 E Buffalo Gap 09 1350MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts were estimated at 70 mph.A severe thunderstorm produced 70 mph wind gusts east of Buffalo Gap. Note: The estimated wind gust of 61 knots isequivalent to 70 mph.Shannon County1 N Rockyford 09 1425MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Strong wind gusts accompanied a severe thunderstorm near Rockyford. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Mellette County5 E Wood 11 1535CST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts were estimated at 70 mph.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Tripp County8 NW Witten 11 1557CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated around 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Tripp County4 NW Witten 11 1605CST 0 0 0.00K 0.00K Hail (1.00)Tripp County3 ESE Witten 11 1635CST 0 0 0.00K 0.00K Hail (1.00)Tripp County4 WNW Winner 11 1652CST 0 0 0.00K 0.00K Hail (1.00)A severe thunderstorm developed over Mellette County and tracked eastward across Tripp County. The storm produced hail toquarter size and wind gusts around 60 to 70 mph.Harding County(2WX)Buffalo 11 1808MST1816MST 0 0 0.00K 0.00K Thunderstorm Wind (53MG)Note: The measured wind gust of 53 knots is equivalent to 61 mph.Harding CountyBuffalo 11 1815MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Harding County1 S Reva 11 1845MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Estimated wind gusts to 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Harding County7 SSE Ralph 11 1905MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Perkins CountyPrairie City 11 1915MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts to 60 mph were reported in Prairie City.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.409

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, WestPerkins County5 SSE Lodgepole 11 1915MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Perkins CountyLemmon 11 2004MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts of 60 mph occurred in Lemmon.Severe thunderstorms developed over Harding County and moved across northern Perkins County, producing 60 mph windgusts across much of the area. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Butte County23 WNW Castle Rock 12 1811MST 0 0 0.00K 0.00K Thunderstorm Wind (59MG)Note: The measured wind gust of 59 knots is equivalent to 68 mph.Butte County17 N Belle Fourche Arpt 12 1815MST 0 0 0.00K 0.00K Hail (2.00)Butte County17 N Belle Fourche Arpt 12 1815MST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)The combination of hail and wind damaged a home and automobiles.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Butte CountyBelle Fourche 12 1820MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Butte County7 NW Nisland 12 1835MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A severe thunderstorm produced large hail and wind gusts to 70 mph across Butte County, along U.S. Highway 212 in northernMeade County, and northeastward over northern Ziebach County. Note: The estimated wind gust of 52 knots is equivalent to60 mph.Harding County15 SSW Buffalo 12 1845MST 0 0 0.00K 0.00K Thunderstorm Wind (61EG)Wind gusts were estimated at 70 mph.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Harding County(2WX)Buffalo 12 1845MST1852MST 0 0 0.00K 0.00K Thunderstorm Wind (62MG)Note: The measured wind gust of 62 knots is equivalent to 71 mph.Harding County14 ESE Buffalo 12 1901MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)A severe thunderstorm produced wind gusts to 70 mph across Harding and northern Perkins Counties. Note: The measuredwind gust of 52 knots is equivalent to 60 mph.Butte CountyHoover 12 1905MST 0 0 0.00K 0.00K Hail (1.00)Butte CountyHoover 12 1905MST 0 0 7.00K 0.00K Thunderstorm Wind (61EG)The combination of hail and wind broke automobile and house windows.410

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, WestA severe thunderstorm produced large hail and wind gusts to 70 mph across Butte County, along U.S. Highway 212 in northernMeade County, and northeastward over northern Ziebach County. Note: The estimated wind gust of 61 knots is equivalent to70 mph.Harding County11 SSW Reva 12 1905MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts reached 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Harding County5 SSW Reva 12 1920MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)A severe thunderstorm produced wind gusts to 70 mph across Harding and northern Perkins Counties. Note: The measuredwind gust of 56 knots is equivalent to 64 mph.Meade County8 SE Mud Butte 12 1925MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A severe thunderstorm produced large hail and wind gusts to 70 mph across Butte County, along U.S. Highway 212 in northernMeade County, and northeastward over northern Ziebach County. Note: The estimated wind gust of 52 knots is equivalent to60 mph.Perkins County6 ENE Lodgepole 12 1950MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A severe thunderstorm produced wind gusts to 70 mph across Harding and northern Perkins Counties. Note: The estimatedwind gust of 52 knots is equivalent to 60 mph.Meade County12 N Sturgis 12 1954MST 0 0 0.00K 0.00K Hail (1.00)A severe thunderstorm dropped quarter sized hail north of Sturgis.Meade County13 W Faith 12 1957MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Perkins County16 SW Usta 12 2000MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Large tree branches were broken by the strong wind gusts.A severe thunderstorm produced large hail and wind gusts to 70 mph across Butte County, along U.S. Highway 212 in northernMeade County, and northeastward over northern Ziebach County. Note: The estimated wind gust of 52 knots is equivalent to60 mph.Perkins County3 SE Lemmon 12 2015MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)A severe thunderstorm produced wind gusts to 70 mph across Harding and northern Perkins Counties. Note: The measuredwind gust of 56 knots is equivalent to 64 mph.Meade CountyFaith 12 2018MST 0 0 0.00K 0.00K Hail (0.75)A severe thunderstorm produced large hail and wind gusts to 70 mph across Butte County, along U.S. Highway 212 in northernMeade County, and northeastward over northern Ziebach County.Perkins CountyLemmon 12 2019MST 0 0 0.00K 0.00K Thunderstorm Wind (59MG)A severe thunderstorm produced wind gusts to 70 mph across Harding and northern Perkins Counties. Note: The measuredwind gust of 59 knots is equivalent to 68 mph.411

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010SOUTH DAKOTA, WestZiebach County7 SE Glad Vly 12 2050MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A severe thunderstorm produced large hail and wind gusts to 70 mph across Butte County, along U.S. Highway 212 in northernMeade County, and northeastward over northern Ziebach County. Note: The estimated wind gust of 52 knots is equivalent to60 mph.Custer County12 E Buffalo Gap 16 1325MST 0 0 0.00K 0.00K Hail (0.75)Custer County7 SSE Fairburn 16 1330MST 0 0 0.00K 0.00K Hail (0.75)A thunderstorm produced penny sized hail east of Buffalo Gap.Pennington CountyRapid City 17 1349MST 0 0 20.00K 0.00K Hail (1.25)A thunderstorm briefly became severe over downtown Rapid City and produced hail to half dollar size.Harding County5 SSW Camp Crook 29 1826MST 0 0 0.00K 0.00K Hail (0.75)Harding County5 SSW Camp Crook 29 1826MST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)TENNESSEE, CentralStrong wind gusts damaged a fence and blew down many tree branches.A severe thunderstorm produced wind gusts to 60 mph and penny sized hail near Camp Crook. Note: The estimated wind gustof 52 knots is equivalent to 60 mph.TNZ005>008-022>028-056>062-075-093>095Bedford - Benton - Cheatham - Davidson - Dickson - Giles - Hickman - Houston - Humphreys - Lawrence -Lewis - Marshall - Maury - Montgomery - Perry - Robertson - Rutherford - Stewart - Sumner - Wayne -Williamson - Wilson04 1200CST1800CST 0 25 100.0K 0.00K Excessive HeatAfternoon heat index readings ranged from 110 to 115 degrees over much of Middle Tennessee on August 4th. Around theNashville Metropolitan area, a couple dozen people were hospitalized suffering from heat exhaustion along with several othersbeing hospitalized suffering from burnt feet. There were no known fatalities. There were also numerous reports of damage fromthe heat, including exploding tires on automobiles.Sumner County2 NNE Pleasant Grove2 ENE Sugar Grove05 1035CST 0 0 7.50K Thunderstorm Wind (55EG)Spotters reported trees down on Dave Beasley Road in Westmoreland.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Maury County1 E Columbia 05 1100CST 0 0 5.00K LightningExpert Tire at 509 North Garden Street was struck by lightning, burning the motor in the building's central heating and coolingunit. Otherwise, no other damage to the building was reported.Sumner CountyCastalian Spgs 05 1140CST 0 0 10.00K Thunderstorm Wind (55EG)Trees reported down in Castalian Springs on Rock Springs Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.412

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, CentralWilson County2 NNE Cairo Bend 05 1210CST 0 0 5.00K Thunderstorm Wind (55EG)Trees were downed at the intersection of Berea Church Road and Coles Ferry Pike.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lawrence County1 S Summertown 05 1220CST 0 0 Hail (0.75)Lawrence County1 WNW Summertown 05 1220CST 0 0 10.00K Thunderstorm Wind (55EG)A tree was blown down and into power lines in Summertown. Type of and amount of damage to power lines was unkown.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Jackson CountyFlynns Lick 05 1227CST 0 0 5.00K Thunderstorm Wind (55EG)Onto New Salem Road, trees were blown down.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Smith CountyCarthage 05 1230CST1315CST 0 0 125.00K Thunderstorm Wind (55EG)Trees were reported down county wide. A roof was reported off a carport at 120 Homepage Road in Brush Creek. Barns werealso damaged in Chest Mound. Amount of barns that were damaged and the type of damage to each barn was unknown.Newspapers reported that downed tree and tree limbs knocked power out to several homes in Gordonsville and the surroundingareas.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Dekalb CountyLaurel Hill 05 1235CST1238CST 0 0 0.50K Thunderstorm Wind (50EG)Large tree limbs were reported down on State Highway 96 North.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Dickson County2 W Pomona 05 1240CST 0 0 25.00K Thunderstorm Wind (55EG)Numerous trees and power lines were blown down across the southern portion of the county.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.White County1 S Goulden Mtn 05 1250CST 0 0 Hail (1.75)White County3 ENE Old Zion 05 1250CST 0 0 25.00K Thunderstorm Wind (55EG)Numerous trees and power lines were blown down all across the northern portion of the county.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Putnam County1 WSW Baxter 05 1259CST 0 0 10.00K Thunderstorm Wind (55EG)Large trees were blown down onto Old Baxter Road in Baxter.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.413

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, CentralRutherford CountyDillton 05 1300CST 0 0 5.00K Thunderstorm Wind (55EG)A few trees were blown down 5 miles southeast of Murfreesboro.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.White County1 S Goulden Mtn 05 1300CST 0 0 Thunderstorm Wind (68MG)Note: The measured wind gust of 68 knots is equivalent to 78 mph.Cumberland CountyCrossville 05 1320CST1345CST 0 0 50.00K Thunderstorm Wind (55EG)Numerous trees were blown down across the western portion of the county.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Dickson County1 ENE Bellsburg 05 1340CST1345CST 0 0 7.00K 0.00K Thunderstorm Wind (52EG)At least 10 trees were blown down west of Ashland City along Highway 49.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Coffee County1 ESE Tullahoma 05 1355CST 0 0 25.00K Thunderstorm Wind (55EG)Spotter reported numerous trees downed on Polk Street in Tullahoma.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Grundy CountyPalmer 05 1400CST 0 0 10.00K Thunderstorm Wind (55EG)Trees were reported downed in southeastern part of the county.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Dickson County3 SW Dickson 05 1442CST 0 0 0.00K 0.00K Hail (1.00)Macon County1 NE Siloam 05 1517CST 0 0 Hail (0.88)Humphreys County1 N Pruette Spg 05 1544CST1547CST 0 0 10.00K 0.00K Thunderstorm Wind (54EG)Trees were blow down near Highway 13 south of Interstate 40.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Perry County1 ESE Beardstown 05 1615CST 0 0 10.00K Thunderstorm Wind (55EG)Trees were blown down across State Highway 13 between Linden and Lobelville.Scattered severe thunderstorms developed ahead of a cold front and then moved across Middle Tennessee during the latemorning through afternoon hours on Thursday, August 5th, resulting in thunderstorm wind, hail, and lightning damage. Note:The estimated wind gust of 55 knots is equivalent to 63 mph.414

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, CentralRutherford County2 W Double Spgs 11 1800CST 0 0 50.00K Thunderstorm Wind (55EG)A brief thunderstorm that moved across the city of Murfreesboro produced gusty winds that knocked down several trees andpower lines in downtown Murfreesboro and also damaged at least one piece of property. A large tree was downed on a car, a1998 Nissan Maxima, causing damage. Exact type and extent of damage to the car was unknown. As a result of the downedpower lines, a power outage occurred in downtown Murfreesboro that lasted for about 45 minutes.An isolated severe thunderstorm developed and moved across Rutherford County during the early evening hours onWednesday, August 11th, producing thunderstorm wind damage. Note: The estimated wind gust of 55 knots is equivalent to 63mph.Coffee County1 S Manchester 12 1115CST 0 0 5.00K Thunderstorm Wind (50EG)Spotter reported several broken tree limbs, trash cans blown down along a few streets, along with one tree uprooted.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cheatham CountyPleasant View 12 1400CST 0 0 40.00K Thunderstorm Wind (55EG)Numerous trees were blown down and minor roof damage occurred in Pleasant View.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Davidson County1 E Belle Meade 12 1440CST 0 0 25.00K Thunderstorm Wind (55EG)Numerous trees were reported down in Belle Meade and the adjacent surrounding areas.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Humphreys County2 SW Waverly 12 1625CST 0 0 25.00K Thunderstorm Wind (55EG)Numerous trees and power lines were reported downed along Bakerville Road.Isolated severe thunderstorms developed across Middle Tennessee during the late morning through afternoon hours onThursday, August 12th, resulting in thunderstorm wind damage across five counties. Note: The estimated wind gust of 55knots is equivalent to 63 mph.TNZ062Rutherford13 1200CST1500CST 0 0 0.00K 0.00K HeatA young child died in LaVergne after being left in a hot car for more than three hours.Maury County1 ESE Columbia 14 1815CST 0 0 10.00K Thunderstorm Wind (55EG)A few trees were downed in Columbia.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Smith County1 NW Carthage 14 1815CST 0 0 25.00K Thunderstorm Wind (55EG)Trees and power lines were downed in Carthage.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.White County1 E Yankeetown 14 1935CST 0 0 Hail (0.88)A hot, moist, and unstable airmass developed over much of Middle Tennessee during the afternoon hours on Saturday, August14th, and lead to the development of an atmospheric environment that was conducive for thunderstorm development. Some ofthose thunderstorms that developed reached severe thresholds during the late afternoon through early evening hours across fourcounties in Middle Tennessee, resulting in strong downdrafts that produced damaging straight line winds.415

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, CentralLawrence County1 SSE Webber City 15 1400CST 0 0 10.00K Thunderstorm Wind (55EG)Trees were reported down near Ethridge.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Benton County2 SSW Crossroad 15 1445CST 0 0 15.00K Thunderstorm Wind (55EG)Several trees were reported down at the intersection of Norwood Road and Divider and Natchez Trace Road. These trees werelarge enough that the Benton County Highway Department was called out and chainsaws were needed to remove them fromoff of the road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Wayne County4 ESE Woodlawn 15 1645CST 0 0 25.00K Thunderstorm Wind (55EG)Trees about 10 inches in diameter and power lines were reported down in the vicinity of the intersection of Holly Creek andRailroad Bed Iron City Roads.Isolated severe thunderstorms developed across Middle Tennessee locations west of Interstate 65 during the afternoon hours onSunday, August 15th, resulting in thunderstorm wind damage across three counties. Note: The estimated wind gust of 55 knotsis equivalent to 63 mph.Fentress CountyClarkrange 17 1208CST1430CST 0 0 5.00K 1.00K Flash FloodWater was observed to be several inches deep on roads in Clarkrange.Smith County2 ENE KempvilleDifficult17181425CST0015CST 0 0 1.00M 100.00K Flash FloodSherriffâs office reported several roads in the northeast portion of Smith County with water over the roads, resulting in thembeing closed. Newspapers reported that a section of the roadway was washed out on Dog Branch Road. A large crack onHartsville Pike developed in the Halls Hill community resulting in closure of the road. Heavy rainfall washed rocks onto StateHighway 25 near the Carthage city limits which county's department of transportation had to clear off the road to make itpassible again.Newspapers also reported that Defeated Creek rose to within inches of flooding three mobile homes in the Difficult community.The water rose to the back of the mobile homes which sit along Difficult Road. One family in the 400 block of Difficult Roadhad to be removed from their home by rescue personnel. Water got inside the Pleasant Shade Grocery and Restaurant. On S.P.McClanahan Road, a PT Cruiser was washed downstream by the heavy rainfall.Macon CountyCross RdGreen Grove18190608CST0015CST 0 0 5.00M 2.00M FloodHeavy flooding of low lying areas across the county destroyed tobacco crops that were planted in these areas. Thirty roadsacross the county were reported to have at least moderate damage, mainly across the eastern portion of the county, with 24 ofthose roads being closed. Per the wet soil conditions, several trees also fell across county roadways. Emergency officialsevacuated about 50 nursing home residents from a facility close to a rising creek. Name and exact location of the creek wasunknown.Newspapers also reported that the counties highway department stated that 96 roads were damaged in the flooding, with 22 ofthose suffering moderate to severe damage.All of this damage was the result of 7, to as locally high as 10 inches in a few locations, of rainfall across the county.416

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, CentralWilson CountyGreen HillHunters Pt18190608CST1200CST 0 0 5.00M 250.00K FloodTwo feet of standing water occurred between Newby Street and East Spring Street, and also on South Cumberland Street, for abrief period during the morning hours of Thursday, August 19th, resulting from flooding along Sinking Creek. Stoner Creek,one mile west of Mt. Juliet, went over bank full and resulted in flooding. Several water rescues, per water rising in their yardsblocking them in their homes, were also required in Mt. Juliet.Newspapers reported that the railroad track that carries a commuter train, the Music City Star, between Nashville an Lebanonhad been washed out between Mt. Juliet and Lebanon. Several business, along with public buildings, in Mt. Juliet experiencedflood damage, including David Deaton Karate Studio in the Valley Center on North Mt. Juliet Road and a Fire and Rescuestation which is primarily used to houses ambulances behind Mt. Juliet City Hall. Extent of damage to these business wereunkown. Floodwaters also covered little league baseball and football fields and also knocked over the new fencing aroundCharlie Daniels Football Field in Mt. Juliet. Heavy rains closed the Wilson County Fair, the largest fair in Tennessee, for thefirst time in its 157 year history, for Wednesday night, August 18th.All of this damage was the result of four inches, to as much as one foot in some locations, of rainfall across areas mainly alongand north of Interstate 40.Putnam CountyBuffalo VlyBloomington Spgs18190615CST0015CST 0 0 25.00M 500.00K FloodPippen Road was under 3 to 4 inches of water. Rickman Road near Spring Creek Road area was reported to be flooded. Swiftlymoving water was crossing McBroom Chapel Road. Near this same area, a house was flooded and three vehicles weresubmerged. Portion of Dodson Branch Highway and Willow Avenue were under 7 to 8 inches of water. Multiple structuresacross the county received flood damage, including several home furnished basements, garages, and barns.Newspapers reported that at least 42 roads, along with a few bridges, were closed across the county, and both Cookeville andUpperman High Schools were damaged. Extent of any damage to county roads, bridges, and both high schools was unknown.Widespread flood damage occurred in the city of Baxter, including flooded parts of Baxter Elementary School which also hadthe buildings electrical and telephone system damaged due to flooding. Extent of damage in Baxter was unkown.Newspapers also reported that numerous business in the Cookeville area were also closed due to the flooding, including theshopping center at 541 South Willow Avenue where 4 to 6 inches of water that got into most of the business caused them to beclosed up for a week and a half. The complete extent of damage to the business were unknown, but it was reported that severalof the business had to replace drywall and flooring that was damaged. A freight train carrying sand derailed near the Frisk RoadRailroad Crossing when the tracks were washed away. Several homes also received water damage, including one home inCookeville that washed off its foundation. Several water rescues also occurred, along with a few livestock, horses, and petrescues.Newspapers also reported that more than 25 homes and business across the county sustained uninsured losses of 40 percent ormore of their estimated predisaster fair market value, per reports also from the state's small business administration and theTennessee Emergency Management Agency.Newspapers also reported that in Bloomington Springs, a number of cars at the ABC Auto Specialists were stacked up uponeach other. Also, one whole building of the business was lost. The wife of the owner of the business said that water was overher and her husband's head. Huge trees were reported down in this area also. Cars that they owned were in a nearby creek, ofwhich one was a 1963 Nova SS, which was totally demolished.All of this damage was the result of up to a foot of rainfall in some locations across the county.Jackson CountyNameless1 WNW Gladdice18190620CST0015CST 0 0 10.00M 250.00K Flood417

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, CentralDefeated Creek rose over its banks. Portions of State Highway 85 were covered with approximately 8 inches of water. TheGladdice Fire Department Building appeared to be flooded. Cummins Mill Road was flooded. Swiftly moving water wasreported crossing Rush Fork Road in Bloomington Springs.Newspapers reported that most roads leading into the Blackburn Fork Creek area had been washed away. In all, 35-45 homeswere damaged. Three homes and another was washed away in the Roaring River area. There were also several water rescues,including a 69 year old women whose home had been washed away several hours before on Blackburn Ford Road and near arising creek in the southern part of the county. County schools were closed on Thursday, August 19th due to the flooding.Pavement was reported to have been peeled away in long stretches like strips of black tape and the exposed earth has beengouged into knee-deep gullies. This is where hundreds and hundreds of tall trees were uprooted, where shattered parts of trees,masses of driftwood and other debris were all hurled down downstream by the torrent of flood water and dropped in tangledpiles as big as houses all along the channel of Blackburn Fork, some standing high beside the road that generally parallels thecreek, with some still blocking the road.Overton CountyTimothyHilhamNewspapers also reported several small private bridges and roadways across small creeks, along with a 153 foot public bridge,were destroyed or received major damage. Multiple home furnishing and grooming supplies were found outside all over theplace in some parts of the county.18190622CST0015CST 0 0 10.00M 250.00K FloodSeveral roads across the county were closed due to flooding. A house experienced flooding on Tommy Dodson Highway. Inexcess of a foot of water was over roads and in houses in and near Sulpher. Six houses in this area had water up to the doorsand windows with one of these houses having water to middle of its doors. A boat was also used to rescue an elderly womanfrom her house in this area.Newspapers reported that 75 roads received damage, along with 20 of those roads being destroyed. In addition to this, 70homes were damaged. Extent of damage to individual homes was unknown. Some vehicles were also damaged, including a carthat was nearly submerged when water covered the roadway on State Highway 293 near Ramsey's Market. A few swift waterrescues were also preformed across the county. Many bridges and electrical services were also damaged. Extent of damage tobridges and electrical services was unknown. County schools were also closed and let out early on Wednesday, August 18th,because of the flooding.Newspapers also reproted that tree structures were destroyed, 10 with major damages, 12 with moderate damage, and 30 withminor damage. Several small wood framed structures were also washed away. Several pets were also rescued from multipleflooded homes. Spring Creek overgrew its banks and caused additional flooding problems. Many fences across the county werealso destroyed.All of this damage was the result of a little more than seven inches of rainfall that had fallen across the county.Fentress County2 WSW Pine Haven3 N Jamestown Arpt18190700CST0015CST 0 0 5.00M 250.00K FloodSouth Main Street was covered in about a foot of water near York High School. A tree was also reported down on StateHighway 52 West.Newspapers reported that considerable flooding occurred in some areas of the county, causing considerable damage to severalroads, including the complete washout of West Cave Road, State Highway 154, at the intersection at the intersection of StateHighway 52 west of Jamestown. The heavy rainfall was also responsible for washing out a water line on Glenobey Road.All this damage was the result of more than 5 inches of rain falling in less than 4 hours in some parts of the county.Lewis County4 SE Blondy 18191300CST0015CST 0 0 10.00K 1.00K Flash FloodCar was stuck on Grinders Creek Road near State Highway 20 as flood waters came over the road.418

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, CentralHumphreys County1 E Buffalo 18 1340CST2040CST 0 0 10.00K 1.00K Flash FloodState Highway 13 in the southern part of the county was flooded and impassable.Wayne County5 W WaynesboroAshland18 1700CST1937CST 0 0 8.00M 250.00K Flash FloodNumerous county roads were closed county wide. A total of seven roads are impassable along with two roads being washedout. Public also reported extensive flooding on Flat Gap Creek Road with one house having a foot of water in the house.Newspapers reported that flooding damaged six buildings on Houston Road, and two on Flat Gap Road. Three of these werehomes which were virtually destroyed. From three to four inches of water invaded the homes, covering floors with water,debris, and mud. The rushing water was even forceful enough to completely lift two buildings of their foundations, depositingone 150 yards away, right in the middle of Indian Creek Road. The other was stopped when it crashed into some trees.Newspapers also reported that a small white wood framed building that was as a family/community house of worship on FlatGap Road was shoved off of its foundation and pushed some distance. The house collapsed in on itself as it came to rest againstsome trees in the Vickery yard. Other little outbuildings were also washed away.All of this damage was caused by total rainfall amounts of eight inches to as much as one foot of water in the Flat GapCreek/Houston Communities.Sumner County1 NNW Trousdale2 SSE Liberty19 0130CST0215CST 0 0 50.00K 1.00K Flash FloodNumerous roads were closed due to flooding in Gallatin.Newspapers reported that seven people were rescued during the flash flooding in Gallatin.Wilson County2 WSW Mt Juliet1 W West End Hgts19 0130CST0215CST 0 0 22.00M 5.00K Flash FloodSeveral homes and businesses were impacted by flooding during the early morning of August 18th. Numerous roads wereclosed and there were several water rescues.The remnants of a tropical depression interacted with a stationary front in Middle Tennessee, resulting in excessive rainfallacross several counties east of Interstate 65 corridor. Area averaged between six and seven inches of rain, with some areasreceiving as much as a foot of rainfall. Most of the severe damage across this area included impacted bridges, roads, andmultiple types of structures.Coffee County1 E Tullahoma 21 1743CST 0 0 50.00K Thunderstorm Wind (55EG)Macon County1 SSW Green Vly1 SSW HaysvilleTrees were blown down in the Viola, Hillsboro, and Tullahoma areas. Dozens of trees were blown down in the Bel-Aireneighborhood in Tullahoma.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.21 1910CST 0 0 15.00K Thunderstorm Wind (55EG)Sheriffâs office reported trees down on Shiloh Lane and also at the intersection of Green Valley Road and Sparrow Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.419

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, CentralMaury CountyColumbia 21 1910CST 0 0 30.00K Thunderstorm Wind (55EG)Numerous trees were blown down in Culleoka. Roof damage was also reported to a home in this area, along with a trailer thatwas moved off of its cement blocks. Type of trailer and degree of damage to trailer was unknown.Newspapers also reported that some fencing was taken out at a farm on fronting Frank Moore Road.TENNESSEE, EastIsolated severe thunderstorms developed across locations east of Interstate 65 and west of the Cumberland Plateau Region ofMiddle Tenneessee during the early evening hours on Saturday, August 21st, resulting in thunderstorm wind damage acrossthree counties. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Sullivan County5 NW Blountville 04 1650EST1655EST 0 0 10.00K 0.00K Thunderstorm Wind (58EG)Law enforcement personnel reported multiple trees and powerlines downed by thunderstorm winds northwest of Blountville.A boundary across the area triggered isolated thunderstorms during the late afternoon hours. One of the storms became severeproducing damaging thunderstorm winds. Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Bledsoe County4 NE Pikeville 05 1100CST1105CST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported several trees downed by thunderstorm winds on Mill Dam Road and Upper East ValleyRoad northeast of Pikeville.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Morgan County8 SE Wartburg 05 1240EST1245EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported several trees downed by thunderstorm winds on Mossy Grove Road and Fairview Roadsoutheast of Wartburg.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Sullivan CountyKingsport 05 1245EST1255EST 0 0 15.00K 0.00K Thunderstorm Wind (58EG)Law enforcement personnel reported several trees and powerlines downed by thunderstorm winds in Kingsport.Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Sullivan CountyPiney Flats 05 1255EST1258EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Law enforcement personnel reported one tree downed by thunderstorm winds southwest of Bluff City in Piney Flats.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.TNZ069Knox05 1330EST1335EST 0 0 15.0K 0.00K Strong WindHancock County2 SW Sneedville 05 1340EST1342EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Law enforcement personnel reported one tree and several phones lines downed by thunderstorm winds on Tazewell Highwaynear Sneedville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.420

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, EastRhea County2 ENE Dayton 05 1404EST1410EST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Law enforcement personnel reported several trees downed by thunderstorm winds on Highway 30 and Oak Hill Road nearDayton.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson CountyDandridge 05 1418EST1425EST 0 0 20.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported several trees and powerlines downed by thunderstorm winds in the Dandridge area. Afew buildings were also damaged.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Jefferson CountyWhite Pine 05 1424EST1430EST 0 0 15.00K 0.00K Thunderstorm Wind (58EG)Law enforcement personnel reported several trees and powerlines downed by thunderstorm winds in White Pine.Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Grainger CountyBean Station 05 1425EST1428EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement personnel reported one tree downed by thunderstorm winds on Highway 11W in Bean Station.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson CountyNew Market 05 1435EST1445EST 0 0 8.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported several trees downed by thunderstorm winds around New Market and the western portionsof the county.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Hamblen CountyMorristown 05 1440EST1442EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)An NWS employee reported numerous large limbs downed by thunderstorm winds on Miginnis Road in west Morristown.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hamblen CountyMorristown 05 1445EST1448EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)An NWS employee reported 1 large tree downed by thunderstorm winds in Hickory Shadows subdivision in Morristown.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Morgan County4 NW Wartburg 05 1455EST1500EST 0 0 10.00K 0.00K Thunderstorm Wind (60EG)Law enforcement personnel reported numerous trees downed by thunderstorm winds across the northern portions of county.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.421

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, EastJefferson County2 E Dandridge 05 1500EST1510EST 0 0 25.00K 0.00K Thunderstorm Wind (60EG)The public reported numerous trees and powerlines downed by thunderstorm winds near Dandridge. A few structures were alsodamaged.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Sequatchie CountyDunlap 05 1515CST1525CST 0 0 10.00K 0.00K Thunderstorm Wind (58EG)Law enforcement personnel reported several trees and powerlines downed by thunderstorm winds in Dunlap.Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Bradley CountyCleveland 05 1518EST1525EST 0 0 20.00K 0.00K Thunderstorm Wind (60EG)Law enforcement personnel reported numerous trees and powerlines downed by thunderstorm winds countywide.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Greene County4 S Chuckey 05 1530EST1540EST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported 8 trees downed by thunderstorm winds near Chuckey.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Unicoi County2 S Erwin 05 1533EST1540EST 0 0 15.00K 0.00K Thunderstorm Wind (60EG)Law enforcement personnel reported numerous trees and powerlines downed by thunderstorm winds countywide.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Polk CountyBenton 05 1535EST1545EST 0 0 10.00K 0.00K Thunderstorm Wind (58EG)Utility company personnel reported several trees downed by thunderstorm winds around Benton and countywide.Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Carter County9 S Elizabethton 05 1618EST1625EST 0 0 20.00K 0.00K Thunderstorm Wind (60EG)Law enforcement personnel reported numerous trees and powerlines downed by thunderstorm winds on Highway 19E, Old RailRoad and Town Road south of Elizabethton.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Johnson County6 S Mountain City 05 1630EST1635EST 0 0 8.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported a few trees and powerlines downed by thunderstorm winds between Mountain City andMaymead.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.422

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, EastHamilton County6 ESE Chattanooga 05 1726EST1730EST 0 0 8.00K 0.00K Thunderstorm Wind (5EG)Law enforcement personnel reported 2 trees and powerlines downed on roads by thunderstorm winds southeast of Chattanooga.A boundary across the area triggered isolated severe thunderstorms during the afternoon and evening hours. Note: Theestimated wind gust of 5 knots is equivalent to 6 mph.Marion County3 ESE Jasper 06 1305CST1310CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Law enforcement personnel reported several trees downed by thunderstorm winds on Rector Road near Jasper.A boundary across the area triggered diurnal thunderstorms during the afternoon hours. One of the storms produced damagingthunderstorm winds. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Knox County10 NE Knoxville 11 2245EST2246EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)The highway department personnel reported two trees downed on roads by thunderstorm winds 10 miles northeast ofKnoxville.A boundary across area triggered isolated late evening thunderstorms. Note: The estimated wind gust of 50 knots is equivalentto 58 mph.Rhea County1 N Dayton 12 1300EST1305EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Highway department personnel reported 1 tree downed by thunderstorm winds on Market Street near Dayton.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Monroe County5 SW Tellico Plains 12 1520EST1530EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Law enforcement personnel reported 1 tree on Mecca Pike and another tree on Reliance Road downed by thunderstorm winds 5miles southwest of Tellico Plains.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Washington County1 E Fairview 12 1935EST1945EST 0 0 10.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported numerous trees downed by thunderstorm winds across the northern half of the county.A boundary across the area triggered isolated severe thunderstorms during the afternoon and evening hours. All of the damagereports contained damaging thunderstorm winds. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Johnson CountyTrade 17 1900EST2100EST 0 0 10.00K 0.00K Flash FloodHighway department personnel reported 3 roads in Trade covered by high water from a slow moving thunderstorm.Slow moving thunderstorms brought isolated flooding reports to the mountains of east Tennessee during the evening hours.Campbell County1 W Elk Vly 18 1315EST1515EST 0 0 10.00K 0.00K Flash FloodHigh department personnel reported slow moving thunderstorms brought heavy rain to Elk Valley resulting in a minormudslide on Lick Fork Lane. Part of the bank containing a tree slid onto the road.423

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, EastScott County1 E Oneida 18 1325EST1525EST 0 0 15.00K 0.00K Flash FloodHighway department personnel reported numerous roads flooded in Oneida from slow moving thunderstorms. Some roadswere under 2 feet of water.Bledsoe County9 N Pikeville 18 1518CST1525CST 0 0 20.00K 0.00K Thunderstorm Wind (60EG)Emergency management personnel reported numerous trees and powerlines downed by thunderstorm wind near the intersectionon Big Spring Gap Mountain Road and Beaver Hill Road north of Pikeville.A boundary across the area triggered slow moving thunderstorms during the afternoon hours. Storm reports contained bothdamaging thunderstorm winds and flooding. Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Scott CountyHelenwood 21 1610EST1620EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Utility company reported 1 tree and powerlines downed by thunderstorm winds in Helenwood.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Scott County3 SE Oneida 21 1620EST1625EST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)TENNESSEE, South CentralUtility company reported a few trees and powerlines downed by thunderstorm winds 3 miles southeast of Oneida on JerryCotton Road.A boundary across the area triggered isolated severe thunderstorms during the late afternoon hours. Storm reports containeddamaging thunderstorm winds. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.TNZ076-096-097Franklin - Lincoln - Moore01160000CST1700CST 0 0 0.00K 0.00K HeatA heat wave that began in July continued into early August. Heat index values climbed to at least 105 degrees on mostafternoons from the 1st through the 16th. The hottest temperatures were reported in Lincoln County at Fayetteville, whichreached 102 on the 4th and 101 on the 11th. Upper 90s were reported on all other days through the 16th except for the 6thwith 93 degrees. Morning lows only dipped into the mid 70s on many of those mornings as well. Higher elevations on theCumberland Plateau were 5 to 10 degrees cooler during this period of hot weather.Lincoln County4 NW Taylortown 21 0635CST0645CST 0 0 2.00K 0.00K Thunderstorm Wind (43EG)TENNESSEE, WestA tree was blown down on power lines in the Red Oak community.Very hot and humid conditions developed during the afternoon hours on the 21st. As a result, numerous strong a few severethunderstorms developed ahead of a cold front during the evening hours in Southern Middle Tennessee. One of the stormsknocked a tree down in the Red Oak community. Note: The estimated wind gust of 43 knots is equivalent to 49 mph.TNZ088-089Fayette - Shelby01050900CST1800CST 7 1 0.00K 0.00K Excessive HeatTNZ049-090>091Hardeman - Haywood - McNairy - Tipton01030900CST 0 0 0.00K 0.00K Heat424

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, WestTNZ048>050-090Hardeman - Haywood - Lauderdale - Tipton02050900CST1800CST 0 0 0.00K 0.00K Excessive Heat02030900CST 0 0 0.00K 0.00K HeatTNZ051>053-092TNZ001>004-019>021-051>055-091>092Chester - Crockett - Hardin - Madison02030900CST 0 0 0.00K 0.00K HeatCarroll - Chester - Crockett - Decatur - Dyer - Gibson - Hardin - Henderson - Henry - Lake - Madison -McNairy - Obion - Weakley03050900CST1800CST 0 3 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing from the end of July into the beginningof August. The upper ridge of high pressure produced above normal temperatures over the area. The combination of highhumidity and above normal temperatures produced high heat indices of 105-115 degrees. Seven heat related deaths and at leastfour injuries occurred as a result.Shelby County1 SE Oakville3 SSW Germantown03 1435CST1450CST 0 0 0.00K Thunderstorm Wind (50EG)A microburst produced damaging winds in Southeast Memphis. A semi-trailer was blown over as well as several trees and lightpoles. Roof damage occurred to a warehouse as air conditioners were ripped off of the roof.Hardin CountySavannah2 WSW OlivetAn upper ridge of high pressure weakened slightly over the Mid-South August 3rd allowing a few diurnal showers andthunderstorms to develop over Southwest Tennessee. One storm produced a microburst that caused damaging winds. Note:The estimated wind gust of 50 knots is equivalent to 58 mph.05 1130CST1135CST 0 0 7.00K 0.00K Thunderstorm Wind (50EG)Straight line winds knocked down a couple of trees and a pavilion in Savannah.Henderson County2 SSE BroadwayLexingtonNote: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1500CST1505CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked down a few trees and power lines in Lexington.An upper ridge of high pressure continued to weaken over the Mid-South August 5th allowing a few diurnal showers andthunderstorms to develop over West Tennessee. A few storms produced damaging winds. Note: The estimated wind gust of 50knots is equivalent to 58 mph.TNZ088Shelby08100900CST 0 0 0.00K 0.00K HeatTNZ001>004-019>021-048>055-089>092Carroll - Chester - Crockett - Decatur - Dyer - Fayette - Gibson - Hardeman - Hardin - Haywood -Henderson - Henry - Lake - Lauderdale - Madison - McNairy - Obion - Tipton - Weakley09 0900CST 0 0 0.00K 0.00K Heat10An upper level ridge of high pressure further intensified over the Mid-South continuing into the middle of August. The upperridge of high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced brutal heat indices of 105-120 degrees. Four heat related deaths occurred as a result.425

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, WestShelby County5 S Germantown 09 1315CST1430CST 0 0 0.00K 0.00K Flash FloodHeavy rain produced flash flooding at the intersection of Holmes Road and Autumn Forrest Drive. Water was as high as thefenders of school buses.Shelby County4 SSW Forest Hill 09 1330CST 0 1 0.00K 0.00K LightningA student was struck by lightning and injured near Southwind High School in Southeast Memphis.An upper ridge of high pressure remained over the Mid-South August 9th. Daytime heating allowed a few diurnal showers andthunderstorms to develop over West Tennessee. A few thunderstorms produced heavy rain which caused flash flooding.TNZ001-019-048>055-088>091Chester - Crockett - Decatur - Dyer - Fayette - Gibson - Hardeman - Haywood - Henderson - Lake -Lauderdale - Madison - McNairy - Shelby - Tipton10150900CST1800CST 4 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing into the middle of August. The upperridge of high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced brutal heat indices of 105-120 degrees. Four heat related deaths occurred as a result.Shelby CountyBuntyn2 SSW Memphis10 1625CST1800CST 0 0 0.00K 0.00K Flash FloodHeavy rain produced widespread flash flooding in Midtown Memphis. Numerous streets were closed as a result includingmajor intersections such as Cooper Street and Central Avenue, Walnut Grove Road and Highland Street, and Sam CooperBoulevard and Collins Street.An upper ridge of high pressure remained over the Mid-South August 10th. Daytime heating allowed a few diurnal showersand thunderstorms to develop over West Tennessee. A few thunderstorms produced heavy rain which caused flash flooding.TNZ002>004-021-092Carroll - Hardin - Henry - Obion - Weakley13150900CST1800CST 0 0 0.00K 0.00K Excessive HeatAn upper level ridge of high pressure further intensified over the Mid-South continuing into the middle of August. The upperridge of high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced brutal heat indices of 105-120 degrees. Four heat related deaths occurred as a result.Shelby County1 ENE Whitehaven 13 1425CST1530CST 0 0 0.00K 0.00K Flash FloodHeavy rain produced flash flooding in Whitehaven. MillBranch Road was flooded just north of Shelby Drive.Gibson County1 WSW Central1 SSW Trenton14 1600CST1645CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked numerous large trees down across Gibson County. Several homes sustained roof damage alongSouth College Street in Trenton as well.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Crockett County1 NW Alamo 14 1615CST1620CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked down a few trees across portions of Crockett County.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.426

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, WestCrockett CountyAlamoCross Rd14 1630CST1800CST 0 0 10.00K 0.00K Flash FloodHeavy rain produced flash flooding near Alamo that eventually led to a bridge being partially washed out.Haywood County1 NNW Oakview1 ESE BrownsvilleAn upper ridge of high pressure remained over the Mid-South August 13th-14th. Daytime heating allowed a few diurnalshowers and thunderstorms to develop over West Tennessee. A few thunderstorms produced heavy rain which caused flashflooding.15 1320CST1325CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked down a few trees across portions of Haywood County. Minor roof damage occurred as well. Oneshed was destroyed near Brownsville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Carroll CountyBruceton 15 1420CST1425CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked down several trees and tree limbs as well as a pizza restaurant sign in Bruceton.A cold front moved into the Mid-South on August 15th, 2010. Scattered showers and thunderstorms developed along the front.Some storms became severe and produced damaging winds. Note: The estimated wind gust of 50 knots is equivalent to 58mph.Decatur County3 WSW Largo 18 1405CST1800CST 0 0 0.00K 0.00K Flash FloodHeavy rain produced flash flooding near Decaturville. Concord Road was closed as a result.Hardin County1 SW EurekaSavannah18 1502CST1800CST 0 0 1.20M 0.00K Flash FloodHeavy rain produced widespread flash flooding in Hardin County. Several roads in Savannah were closed as a result includingHighway 64 which was covered by at least six inches of water. At least 5 homes along Hwy 64 in Olive Hill sustained flooddamage. Numerous roads and bridges sustained damage from the flooding. One man was rescued from his vehicle after beingtrapped from flood waters on Lonesome Pine Road. One other motorist had to be rescued as well. Roads were also closednortheast of Savannah where water was as high as two feet on some roads.Remnants of Tropical Depression 5 moved northward into the Mid-South during the day on August 18th, 2010. Showers andthunderstorms developed in association with the Tropical Depression 5. Some storms produced very heavy rain which causedflash flooding.TNZ088Shelby19210900CST 0 0 0.00K 0.00K HeatTNZ001-019-048>052-089>090Crockett - Dyer - Fayette - Hardeman - Haywood - Lake - Lauderdale - Madison - Tipton20210900CST 0 0 0.00K 0.00K Heat21 0900CST1800CST 0 0 0.00K 0.00K Excessive HeatTNZ019-048>055-088>092Chester - Crockett - Decatur - Dyer - Fayette - Gibson - Hardeman - Hardin - Haywood - Henderson -Lauderdale - Madison - McNairy - Shelby - Tipton21 0900CST1800CST 0 0 0.00K 0.00K Excessive Heat427

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TENNESSEE, WestTNZ002>004-021-048>055-088>092Carroll - Chester - Crockett - Decatur - Fayette - Hardeman - Hardin - Haywood - Henderson - Henry -Lauderdale - Madison - McNairy - Obion - Shelby - Tipton - Weakley21 0900CST1800CST 1 0 0.00K 0.00K HeatAn upper level ridge of high pressure remained over the Mid-South during the middle to latter part of August. The upper ridgeof high pressure produced above normal temperatures over the area. The combination of high humidity and above normaltemperatures produced high heat indices of 105-115 degrees. One heat related death occurred as a result.Lauderdale CountyCurve 21 2130CST 0 0 75.00K 0.00K LightningLightning struck a house on Carmack Road, north of Ripley. A fire started as a result causing a complete loss of the home.Lauderdale CountyHenning2 NE Ripley21 2130CST2140CST 0 0 0.00K Thunderstorm Wind (50EG)Straight line winds knocked several trees and power lines down along Highway 51 in Ripley. A mobile home sustained roofdamage and had the underpinning blown out in Henning. A tree and swing set was also blown over as well.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Shelby County2 NE East Acres 21 2320CST2325CST 0 0 0.00K Thunderstorm Wind (50EG)TEXAS, CentralStraight line winds knocked down trees and power lines at the intersection of Armour Road and Millington-Arlington Road inMillington.A dying mesoscale convective system moved into the Mid-South during the late evening hours of August 21st, 2010. Some ofthe storms produced damaging winds that continued into the early morning hours of August 22nd, 2010. Note: The estimatedwind gust of 50 knots is equivalent to 58 mph.Throckmorton County1 S Woodson 06 1625CST1635CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Damaging wind gusts were estimated near 60 mph with tree limbs down in the City of Woodson.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Taylor CountyAbilene 06 1915CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)TEXAS, Central SoutheastLaw Enforcement Officials reported downed power lines.Isolated thunderstorms produced microbursts winds in Abilene and Woodson. Note: The estimated wind gust of 52 knots isequivalent to 60 mph.Houston County3 E Austonia 06 1930CST 0 0 10.00K 5.00K Thunderstorm Wind (60EG)A 200 year old barn was destroyed and several 200 year old oak trees were downed from strong straight line winds.An early evening severe thunderstorm produced straight line wind damage southeast of Crockett. Note: The estimated windgust of 60 knots is equivalent to 69 mph.Fort Bend County1 NW Rosenberg 23 1700CST 0 0 25.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm winds peeled back a metal roof at a strip mall shopping center. Business damage was also reported at a lumberfacility along Highway 35. There was fence damaged reported at Lamar High School's athletic fields. There were also a fewtrees and branches downed throughout downtown Rosenberg.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.428

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, Central SoutheastFort Bend CountySugarland 23 1701CST 0 0 Thunderstorm Wind (50EG)There was a report of tree branches down just southeast of the Highway 59 and Highway 6 intersection.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fort Bend County1 E Rosenberg 23 1705CST 0 0 4.00K 0.00K Thunderstorm Wind (56EG)There was fence damage at Terry High School's athletic fields.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Fort Bend County1 E Richmond 23 1716CST 0 0 8.00K 0.00K Thunderstorm Wind (56EG)Thunderstorm wind gusts damaged windows at Hutchinson Elementary School.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Fort Bend CountyRichmond 23 1720CST 0 0 Thunderstorm Wind (56EG)A spotter reported strong winds that were lifting shingles off residences.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Fort Bend County1 SSW Richmond 23 1723CST 0 0 12.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds uprooted a tree that damaged a concrete path at the Fort Bend Country Club. There were also reports ofroof and water line damage.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Harris County1 W Channelview 23 1742CST 0 0 8.00K 0.00K Thunderstorm Wind (56ES)A spotter reported large limbs broken off trees and flying debris.Note: The estimated wind speed of 56 knots is equivalent to 64 mph.Austin CountyNew Ulm 23 1845CST 0 0 Thunderstorm Wind (52EG)A large tree was blown over by severe thunderstorm wind gusts.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Colorado County4 SSE Borden 23 1850CST 0 0 10.00K 0.00K Thunderstorm Wind (58EG)Strong winds collapsed one barn roof along County Road 210 and damaged another barn along FM 2434. There werenumerous reports of trees downed over roadways along County Road 215 near the entrance of Oakridge Ranch and CountyRoad 213.Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Colorado CountyColumbus 23 1907CST 0 0 6.00K 0.00K Thunderstorm Wind (56EG)There were numerous reports of downed trees and power lines.Several westward moving thunderstorms that developed across the western half of Houston produced strong damaging winds.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.429

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, Central SoutheastLiberty CountyMoss Bluff 24 1430CST 0 0 Thunderstorm Wind (52EG)A treer was downed along Highway 146 just south of Liberty.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fort Bend CountyRichmond 24 1610CST 0 0 3.00K 0.00K Thunderstorm Wind (60EG)TEXAS, Extreme WestPower lines were downed at FM 359 and Plantation Road.Afternoon Severe thunderstorms produced some wind damage. Note: The estimated wind gust of 60 knots is equivalent to 69mph.El Paso County1 NNE Fabens Arpt 13 1420MST1430MST 0 0 4.00K 0.00K Thunderstorm Wind (56EG)Law enforcement reported 4 light poles blown down by high winds near mile marker 49 on Interstate 10. Extensive hailcovered the ground and 0.49 inches of rain was reported in 20 minutes at Fabens Elementary School.A weak upper level disturbance combined with a surface trough over far West Texas provided the lift for thunderstorms todevelop over El Paso County. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hudspeth CountyDell City 19 1700MST1715MST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)Several utility poles and trees were blown down in Dell City. A tin roof was also torn off of a house. In addition, rainfall totalsof 1 to 2 inches were reported.A weak disturbance moved through westerly flow aloft to produce severe thunderstorms over Hudspeth County. Note: Theestimated wind gust of 56 knots is equivalent to 64 mph.El Paso County2 NW Montoya 23 1615MST1620MST 0 0 0.00K 0.00K Hail (0.75)Penny sized hail was reported just near the intersection of Artcraft Road and Interstate 10.Moist easterly flow under an upper level ridge provided lift to produce strong thunderstorms over West El Paso.Hudspeth CountyDell City 29 2000MST2020MST 0 0 3.00K 0.00K Thunderstorm Wind (61EG)TEXAS, NorthPower was knocked out in Dell City for more than 12 hours after wind blew the phase off of a transmission pole a mile and ahalf north of Highway 62/180. In addition 1 to 2 inches of rain also fell across the area.A deep trough was digging into the Desert Southwest with a surface trough located across West Texas providing the lift andshear for severe thunderstorms. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Hopkins CountySulphur Spgs Muni Ar 06 1305CST 0 0 0.00K 0.00K Thunderstorm Wind (58MG)The automated weather station at the Sulphur Springs Municipal Airport (KSLR) measured a 67 mph wind gust.Note: The measured wind gust of 58 knots is equivalent to 67 mph.Hopkins County2 SSE Cumby 06 1312CST 0 0 0.00K 0.00K Hail (0.75)Dime size hail was reported on CR 4131, two miles south of Cumby.430

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, NorthHopkins County2 SSE Cumby 06 1312CST 0 0 0.10K 0.00K Thunderstorm Wind (52EG)Trees were knocked down by thunderstorm winds on CR 4131, two miles south of Cumby.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Van Zandt CountyCanton 06 1535CST 0 0 0.50K 0.00K Thunderstorm Wind (52EG)A 60 mph wind gust was estimated at the Van Zandt Sheriff's Office in Canton.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Young County1 NNW Olney 06 1540CST1545CST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)PSI Industries in Olney lost its roof and a door due to thunderstorm winds. Also in Olney, the drive-thru menu at Dairy Queenwas knocked over, the sign at Goldsmith Supply Co. was damaged, and trees, tree limbs, signs, and power poles were knockeddown. A possible downburst may have caused the damage. In addition, several power poles were knocked down along FM2178 on the north side of town.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Denton County1 SSW Corinth 06 1610CST 0 0 10.00K 0.00K Thunderstorm Wind (61EG)In the Post Oak/Meadowview area of Corinth, trees up to 14 in diameter were knocked down by downburst winds. The roof ofa mobile home was also peeled back.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Denton County1 W Corinth 06 1610CST 0 0 25.00K 0.00K Thunderstorm Wind (61EG)More than 30 homes in the Oakmost subdivision of Corinth were damaged when a downburst hit the area. The only informationregarding the damage was limited to a shed imploding on Andover Street, a brick wall fell over, and several chimneys weredamaged.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Kaufman CountyKaufman 06 1610CST 0 0 0.60K 0.00K Thunderstorm Wind (52EG)Sixty mph winds were estimated in the city of Kaufman. A few trees were knocked down by the strong winds.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ellis CountyGarrett 06 1611CST 0 0 0.00K 0.00K Hail (0.75)Penny size hail was reported in Garrett.Ellis CountyGarrett 06 1611CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds of 60 mph were estimated in Garrett.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Ellis County1 NNW Ennis 06 1615CST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)A trained spotter reported roof damage to 3 buildings on the north side of Ennis. No other information was available.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Comanche County2 ESE Comanche Co Arpt 06 1630CST 0 0 15.00K 0.00K Thunderstorm Wind (65EG)Damaging downburst winds hit a home 2 miles outside the city of Comanche, ripping off most of the roof and uprooting a largemulberry tree. The tree fell across the garage.431

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, NorthA weak frontal boundary draped across north Texas provided a focus for afternoon thunderstorm development. Downbursts andmicrobursts were the main threat in the hot and unstable atmosphere. The most significant wind damage occurred in Corinthand near Comanche. Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Erath CountyStephenville 16 1750CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Numerous large trees and tree branches were knocked down across Stephenville by thunderstorm winds. The newspaperreported that the northwest parts of the city appeared to be hit the hardest by the winds. Power lines were also down in parts ofthe city.Strong thunderstorm winds from an afternoon thunderstorm caused tree damage in Stephenville. Note: The estimated windgust of 56 knots is equivalent to 64 mph.Erath CountyLingleville 17 1620CST 0 0 50.00K 0.00K Thunderstorm Wind (65EG)A possible microburst caused damage along a 3 mile stretch on FM 219 between Lingleville and Huckabay. The exact locationof the damage is unknown. Trees were snapped, homes were damaged, and a barn lost its metal roof. More significantly, alarge silo was blown from its base across a field.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Collin CountyMckinney 17 1710CST 0 0 0.10K 0.00K Thunderstorm Wind (52EG)The Sheriff's Office reported large trees were knocked down and blocking roads in McKinney.An afternoon thunderstorm produced some minor wind damage in McKinney and a possible microburst in Erath County. Note:The estimated wind gust of 52 knots is equivalent to 60 mph.Anderson CountyElkhart 18 1440CST 0 0 0.50K 0.00K Thunderstorm Wind (56EG)Multiple large trees were knocked down by downburst winds in Elkhart.An afternoon thunderstorm produced some minor wind damage in Elkhart. Note: The estimated wind gust of 56 knots isequivalent to 64 mph.Kaufman County2 WNW Lawrence 23 1430CST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)Roof and ceiling damage was reported at the Villager Inn near Highway 80 and Spur 557; west of Terrell. A large portion ofthe roof was torn off.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Kaufman County2 N Talty 23 1435CST 0 0 35.00K 0.00K Thunderstorm Wind (61EG)The emergency manager reported roof and wall damage to one home on CR 213A and also 2 metal buildings in the same areawere destroyed.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Grayson County2 SW Ellsworth 23 1550CST 0 0 5.00K 0.00K Thunderstorm Wind (56EG)Numerous power poles and trees were reported down north of Highway 82 between Texoma Parkway and Loy Lake Road.Additional wind damage was also noted to the north and east of this location.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Grayson County2 W Sherman Muni Arpt 23 1610CST 0 0 2.00K 0.00K Thunderstorm Wind (61EG)Estimated thunderstorm winds of 60-70 mph were reported in Sherman by a local newspaper reporter. Powerlines and treeswere knocked down in the city.Afternoon thunderstorms produced wind damage in Kaufman County and a microburst near Sherman in Grayson County.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.432

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, NorthHood County2 SSE Acton 24 1210CST 0 0 6.00K 0.00K Thunderstorm Wind (54EG)A condo in DeCordova Bend Estates sustained minor roof damage due to thunderstorm winds. Also, some large trees wereknocked down.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Ellis County3 ESE Waxahachie 24 1308CST 0 0 0.00K 0.00K Hail (1.00)One inch hail was reported at the intersection of Highway 287 and Parks School House Road on the east side of Waxahachie.Mclennan County1 ESE Bosqueville1 NE Beverly24 1407CST1440CST 0 0 5.00K 0.00K Thunderstorm Wind (61EG)Strong thunderstorm winds caused tree damage and downed power lines along a stretch from north Waco to downtown Waco.Large trees were blown down by thunderstorm winds on Lake Shore Drive near McLennan Community College. Four largetrees were also down at 19th Street and Tanglewood Ave near the McLennan Community College. Other downed large treelimbs and splintered trees were reported along the path towards downtown Waco.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Stephens CountyBreckenridge 24 1447CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Numerous tree limbs were broken off in Breckenridge due to thunderstorm winds that were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Eastland CountyRising Star 24 1620CST 0 0 9.00K 0.00K Thunderstorm Wind (56EG)Scattered tree damage was reported in Rising Star where large tree limbs and small trees were knocked over by thunderstormwinds. One large tree was uprooted and fell onto part of a manufactured home. Another tree fell on a parked minivan.Severe thunderstorms developed in a hot atmosphere along and ahead of a cold front. Damaging thunderstorm winds were themain threat and produced mainly tree damage to parts of north Texas. Note: The estimated wind gust of 56 knots is equivalentto 64 mph.Anderson County1 NW Palestine 30 1800CST 0 0 3.00K 0.00K LightningLightning struck a utility pole on Cottage Avenue that resulted in a small fire and damage to the pole.A lightning strike caused a fire on a utility pole in Palestine.TEXAS, North PanhandleHartley County15 SW Dalhart 04 1804CST1806CST 0 0 1.00K 0.00K Hail (0.88)The public reported hail damage to the windows of her home southwest of Dalhart near U.S. Highway 54. No injuries werereported.Hartley County15 SW Dalhart 04 1804CST1806CST 0 0 0.60K 0.00K Thunderstorm Wind (61EG)The public reported wind damage to her home southwest of Dalhart near U.S. Highway 54. The winds reportedly blew down abasketball hoop and a large trampoline in her yard had blown away. No injuries were reported.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.433

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, North PanhandleGray CountyPampa Lefors Arpt 04 1822CST1824CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)Note: The measured wind gust of 50 knots is equivalent to 58 mph.Potter County11 N Amarillo 04 1840CST1842CST 0 0 20.00K 0.00K Thunderstorm Wind (61EG)The broadcast media reported that a tractor trailer rig had blown over on U.S. Highway 287 north of Amarillo at River ParkDrive. No injuries were reported.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Oldham County1 N Boys Ranch 04 1847CST1849CST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)A trained spotter also reported tree limbs down in Boys Ranch...however the trained spotter could not estimate the size of thetree limb while he was driving. No injuries were reported.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Hartley CountyChanning 04 1900CST1902CST 0 0 15.00K 0.00K Thunderstorm Wind (61EG)Local law enforcement officials reported numerous power lines down due to thunderstorm winds from Channing to five milesnorth of Channing. No injuries were reported.Severe thunderstorms produced some hail along with damaging thunderstorm winds during the early evening hours across thewestern...southern...central and eastern Texas Panhandle. No injuries were reported...however there were several reports ofdamage from the hail and thunderstorm winds. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Potter County7 NW Amarillo 10 1414CST1416CST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)A severe thunderstorm during the afternoon hours produced strong thunderstorm wind gusts across the south central TexasPanhandle. No damage or injuries were reported. Note: The measured wind gust of 55 knots is equivalent to 63 mph.Randall County1 SE Canyon 13 1830CST2030CST 0 0 25.00K 0.00K Flash FloodA trained spotter reported that several vehicles had stalled on the north side of Canyon with water up to the doors. The trainedspotter also reported that there was two to three feet of water over some roads. No injuries were reported.Thunderstorms producing very heavy rainfall and moving very slowly caused flash flooding in the south central TexasPanhandle during the evening hours. No injuries were reported...however several vehicles had stalled in the high water andwere damaged.Armstrong County13 NE Wayside 17 1748CST1750CST 0 0 0.00K 0.00K Hail (0.75)TEXAS, NortheastA severe thunderstorm moved across the south central Texas Panhandle during the early evening hours producing hail. Nodamage or injuries were reported.TXZ165Angelina02 1400CST 1 0 0.00K 0.00K Excessive HeatA large ridge of high pressure both at the surface and aloft allowed for excessively hot temperatures across northeast Texasthrough much of August. Daily afternoon temperatures often climbed above 100 degrees with heat index values climbingbetween 105 to 110 degrees in the afternoon. M61OU434

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, NortheastUpshur County1 ENE Enoch 06 1508CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Trees were downed one mile west of Gilmer, Texas.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Gregg County1 WNW Gladewater 06 1530CST 0 0 0.00K 0.00K Thunderstorm Wind (53EG)Trees were downed in Gladewater, Texas.Note: The estimated wind gust of 53 knots is equivalent to 61 mph.Gregg County1 NE Kilgore 06 1555CST 0 0 0.00K 0.00K Thunderstorm Wind (54EG)A few trees were downed in Kilgore, Texas.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Gregg County2 NE Greggton 06 1600CST 0 0 40.00K 0.00K Thunderstorm Wind (54EG)Trees were downed in Longview, Texas. One tree, a 100 foot tall pine tree, fell through a home in the 4300 block of KennedyTrail in north Longview.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Rusk County3 NE Henderson 06 1615CST 0 0 10.00K 0.00K LightningLightning caused a house fire on CR. 214D near Hwy. 43. There were no report of injuries.Gregg County1 W Easton 06 1630CST 0 0 0.00K 0.00K Thunderstorm Wind (54EG)Numerous large tree branches were downed with lots of debris across Hwy. 149 in the community of Easton. Visibility wasnear zero at one point. Reported by the Tatum, Texas police department.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Rusk County6 NNW Minden 06 1645CST 0 0 0.30K 0.00K LightningLightning caused a battery fire on CR 354D off of FM 2867.A very tropical like airmass resided across the four state region during the afternoon and evening hours of August 6th. A weakfrontal boundary was stalled across northern Texas into southern Arkansas. This combined with a weak disturbance aloft toproduce showers and thunderstorms in a very unstable environment. Storms that developed were prolific lightning producersand as they decayed, produced strong and damaging wind gusts along with some small hail.Bowie County3 NE Simms 07 1655CST 0 0 1.00K 0.00K LightningLightning struck a pine tree just northeast of Simms, Texas causing a fire. The Texas Forest Service was on the scene toextinguish the fire.Bowie County1 N De Kalb 07 1655CST 0 0 20.00K 0.00K LightningLightning caused a fire to a mobile home near Dekalb, Texas. No injuries were reported.Strong thunderstorms once again developed across portions of northeast Texas during the afternoon and evening hours ofAugust 7th. These storms were prolific lightning producers and two lightning strikes were documented across the region.TXZ165Angelina24 1430CST 1 0 0.00K 0.00K Excessive HeatAmbient temperature in the Lufkin, Texas area during the afternoon of August 24th climbed to 103 degrees. An infant was leftinside an automobile in a parking lot and was later discovered deceased. F0VE435

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, SouthStarr CountyFalcon Hgts1 WNW Los Saenz01100000CST0230CST 0 0 0.00K 0.00K FloodThough the heavy rains had long since passed, and most days were dry from late July into much of August, release rates fromdams and reservoirs across northeast Mexico tributaries flowing into the Rio Grande, as well as along the Rio Grande itself,continued at high levels into early August.All of this water would continue impact hundreds of structures during the event. The city of La Grulla remained under avoluntary evacuation into early August as waters began to recede slowly. As a precautionary measure in the city of Roma, threesmall subdivisions located in the low lying areas and along the bank just south of the Port of Entry were placed undermandatory evacuation. These included De La Cruz sub-division about (20 to 25 homes), Campo Verde (4 homes), and Garzasub-division (1 home). The flooding in Starr County had impacted at least 178 homes/businesses, including 65 in La Grulla and39 in Roma. 166 families required temporary housing. Preliminary damages to highways and bridges in Starr County was at$19 million; preliminary public and private property estimates were listed at an additional $18 million. Agricultural damagewas also notable in flooded areas. Note: Since the bulk of the flood related damages occurred in July, dollar estimates are listedwith the July report. [Data will be available later in September].Torrential rainfall from Hurricane Alex and remains, followed by daily peltings of rain across the front range of the SierraMadre Oriental, and concluding with the remnants of Tropical Depression Number 2 dropped perhaps 50 or more inches of rainacross Coahuila Province, Mexico, which flowed steadily through the Rio Grande basin, requiring a series of planned floodcontrol actions to mitigate the possibility of severe river flooding across the Lower and Middle Rio Grande Valley. Severeflooding in Monterrey, Nuevo Leon, México from June 30th through July 2nd, from an estimated 30 inches of rain in thisarea was a portent of future impacts on the Rio Grande during the weeks to come, lasting for much of July and the first third ofAugust.Major flooding along the river south of Falcon International Reservoir continued through August 3rd due to maintained releasesof 60,000 cfs at the dam. Flood conditions (50 feet or higher) continued a few days beyond, with levels dropping below floodstage on August 10th at 330 am CDT. In total, the river was in flood at Rio Grande City, and at points immediately upstream inStarr County, from the afternoon of July 8th through the early morning of August 10th, 33 days in total!A number of small communities along the Rio Grande west of the Lower Rio Grande Valley Flood Control System wereimpacted by the now sprawling river for most of July, soon after the large releases began at Falcon International Reservoir.These included locations from Starr County immediately downstream of the dam, extending along the river to the HidalgoCounty line. Voluntary and mandatory evacuations were ordered for a number of threatened communities; as of this writing, nofatalities had been reported directly from the high waters. There were dozens of water rescues on the river through the period,many of them transmigrants attempting to cross from Mexico into Texas.On August 3rd, President Obama declared most counties in the Rio Grande Valley a Major Disaster, eligible for federal fundingto assist with the longer term recovery. Deep South Texas Counties included Starr and Zapata (due to flooding). Property andCrop damages from the flood in Starr and Zapata Counties will ultimately total over $50 million when all assessments arecompleted. As of July 29th, property damage estimates in Starr County had reached $37 million; additional property damagevalues had not been received from Zapata County. Crops planted in flood zones were destroyed by the long duration of nutrientrich waters.Note: The vast property damage estimates from the flood are provided in the July Storm Data report.Cameron County5 NNW Santa Rosa 01 0000CST 0 0 0.00K 0.00K Flood20High and fast flowing waters continued through the North Floodway in extreme northwest Cameron County well into August,as water continued to flow through the Anzalduas (Hidalgo County) Diversion Dam into the Lower Rio Grande Flood ControlProject (floodways/levee system).These floodways, protected by a robust system of levees and gates, protected communities outside of the levees by containingup to 50%, or 4 to 8 to feet, of fast flowing water, within them. In Cameron County, there were no reports of structural damageas the North Floodway tracks in largely uninhabited country. However, several paved and unpaved roads were flooded insidethe levees, including the Federal Highway 77 (Expressway) frontage road (the Expressway was well above the water level),County Road 506, and FM 1425 (along the Cameron/Hidalgo County line).The North Floodway finally drained to mud toward the end of the month. The end date of the high water is a best estimate.Crops may have been destroyed by the flood along North Floodways, but damage in northwest Cameron County was unknownas of this writing. Infrastructure damage to roads and low water bridges may have exceeded [$x] thousand in northwesternCameron County. Note: The dollar damage estimate is listed with the July report.436

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, SouthHidalgo County1 WSW Carrizelos1 ESE Havana01100000CST1930CST 0 0 0.00K 0.00K FloodRiver flooding continued into the first third of August based on upstream gaging information in Starr County. Affectedcommunities included Cuevitas, Havana, and the south portions of La Joya and Penitas - locations not protected by the LowerRio Grande Valley Flood Control Project levee system. The city of Los Ebanos, surrounded on three sides by the river, wasmost impacted by the flood, which was well over a mile wide for several weeks. Major flooding continued into the first days ofAugust - most likely August 4th.Voluntary evacuations continued in the area between Cuevitas and Penitas into early August; conditions improved by the 10thas the river returned to its banks. At that point, the cleanup of mud caked mud filled structures and roadways began - theseefforts would continue into September.In all, hundreds of structures, as well as paved and unpaved roads, were damaged significantly by the long duration flood. Mostof these were in Los Ebanos, but others were along or south of Military Highway between Cuevitas and the south portion ofPenitas. Five homes were evacuated near Military Road in Havana where the river flooded them. Damage to property wasestimated to be $[xx] million, with additional [unknown] damage to crops in southwestern Hidalgo County estimated at $ [yy]thousand/million. Note: Damage estimates are included with the July report, based on the direct causative impacts from thedeepest, widest, and fastest flows.Hidalgo County2 ENE Progreso01 0000CST 0 0 0.00K 0.00K Flood4 NNW Mercedes Old Reb Arp 19Flooding of the Lower Rio Grande Valley Flood Control Project floodway/levee system (spillway), which includes the BankerFloodway (from near Granjeno to just south of Pharr), the Main Floodway (from just south of Pharr to the split at the ArroyoColorado just southwest of Mercedes, the Arroyo Colorado itself, and the North Floodway, (which extends from near Mercedesto near La Villa before curving east to northwest Cameron County), continued through a good portion of August, as watercontinued to be diverted through Anzalduas for several days beyond the time that water was receding upstream of the dam.Continuing water diversion helps reduce the potential for backwater flooding along the improved levee section (Penitas toAnzalduas) as well as unprotected shorelines west of Penitas. At the same time, the diversion maintained several feet of waterin the floodways for days to come which receded more slowly. The floodway emptied out for the most part by August 15th,but local high water hazards continued through at least the 18th.These floodways, protected by a robust system of levees and gates, protected communities outside of the levees by containingup to 50%, or 4 to 8 to feet of fast flowing water, within them into the first third of August. Unfortunately, a number ofresidences, dozens of paved and unpaved roads with low water bridges, and some agriculture are located within the floodways;significant damage was noted in several locations. Pumping and plugging operations near Weslaco and La Villa successfullykept high water out of poor drainage locations where the potential for freshwater flooding due to heavy rains would have beenexacerbated with periodic thunderstorms, which did not materialize in August. Closed roads included FM 493 and FM 1015,each moderately traveled; at least five homes were flooded along the Main Floodway south of Pharr along I Road; 15 to 20homes were asked to voluntarily evacuate, and at least two other residences were flooded south of Weslaco near FM 88.Floodwaters also submerged portions of the Llano Grande golf course in Mercedes.Voluntary evacuations were finally lifted along I Road (Capote Farms subdivision) on August 18th at 6 PM CST, where the 15to 20 homes mentioned above were located. Wet, muddy conditions continued in these areas until the last week of August;damage assessments began on roadways and bridges impacted in the floodway after the waters finally receded. In all, thefloodways contained water for more than 6 weeks.High flowing water along the river covered a large portion of the Lower Rio Grande Valley National Wildlife Refuge (SantaAna) south and southeast of Pharr, including a number of unpaved roads. Damage to the roads was unknown at this time; theflooding occurred downstream of the Anzalduas Diversion Dam; river gages downstream at San Benito and Brownsvilleremained in action stage. Floodwaters did not reach public or private structures, nor roadways, between the Refuge and theMain Floodway. The water finally receded back to muddy pockets sometime between August 27th and 28th.There was one reported fatality in early August; a man drowned after reportedly driving his car accidentally into the fastflowing waters of the floodway late on August 1st or early on August 2nd. His body was found along the south side of the MainFloodway, near S. Jackson and W. Juan Balli Road just west of Pharr.Several crops may have been destroyed by the flood along the Main and North Floodways, but damage was unknown as of thiswriting in this area. Property and infrastructure damage may have exceeded [$10] million in these areas. Note: Dollar damageestimated for the flooding are provided in the July report.437

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, SouthHidalgo CountyPenitas1 WSW ChihuahuaResidual dirt and mud left behind after 6 weeks of flooding in the Main and North Floodways of the LowerRio Grande Valley Flood Control Project, Hidalgo County, TX. Photograph taken August 23rd by HidalgoCounty Emergency Management.01100000CST1930CST 0 0 0.00K 0.00K FloodRiver flooding continued into the first third of August across the initial section of the Lower Rio Grande Valley Flood ControlProject, which includes improved levees between Penitas and the Anzalduas Diversion Dam southwest of Granjeno. While thelevees protected most property behind them, a number of structures built inside the levees suffered significant and costly waterdamage, from Penitas to south of Granjeno.The structures included the popular river front Chimney Park RV Resort, which had more than 3 feet of water cover half of theland and property; Pepe's on the River Bar and Grill and the Riverside Club, favorite haunts for Winter Texans and localresidents alike which provide river views but unfortunately were covered by feet of mud after the flood waters subsided inAugust. Some crop may have been destroyed by the flood, but damage was unknown as of this writing in this area. Propertydamage may have exceeded [$5] million in these areas alone. Note: Damage estimates for this portion of the flood area arelisted in the July report.Willacy County7 ESE Sebastian7 S Willamar01 0000CST 0 0 0.00K 0.00K Flood20High and fast flowing waters continued through the North Floodway in extreme southeastern Willacy County well into August,as water continued to flow through the Anzalduas (Hidalgo County) Diversion Dam into the Lower Rio Grande Flood ControlProject (floodways/levee system).These floodways, protected by a robust system of levees and gates, protected communities outside of the levees by containingup to 50%, or 4 to 8 to feet, of fast flowing water, within them.The North Floodway finally drained to mud toward the end of the month. The end date of the high water is a best estimate. InWillacy County, there were no reports of structural damage. However, FM 507 and FM 1420, as well as several paved andunpaved county roads, were closed at low water crossings inside the levee. Earlier in July, a leaky levee valve requiredpumping water away from homes just east of FM 1420 immediately north of the Levee Road near Santa Monica.Crops may have been destroyed by the flood along North Floodway, but damage in the Willacy County portion was unknownas of this writing. Infrastructure damage to roads and low water bridges may have exceeded [$x] thousand in southeasternWillacy County. Note: The dollar damage for this portion of the flood is included with the July report.438

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, SouthTorrential rainfall from Hurricane Alex and remains, followed by daily peltings of rain across the front range of the SierraMadre Oriental, and concluding with the remnants of Tropical Depression Number 2 dropped perhaps 50 or more inches of rainacross Coahuila Province, Mexico, which flowed steadily through the Rio Grande basin, requiring a series of planned floodcontrol actions to mitigate the possibility of severe river flooding across the Lower and Middle Rio Grande Valley. Severeflooding in Monterrey, Nuevo Leon, México from June 30th through July 2nd, from an estimated 30 inches of rain in thisarea was a portent of future impacts on the Rio Grande during the weeks to come, lasting for much of July and the first third ofAugust.Major flooding continued for nearly a month at Rio Grande City - and by proxy, southwest Hidalgo County - continuingthrough August 3rd! Flood conditions (50 feet or higher) continued a few days beyond, with levels dropping below flood stageon August 10th at Rio Grande City and just a little bit later in southwest Hidalgo County. In total, the river was likely in floodat points downstream in southwest Hidalgo County, from the morning of July 9th through at least August 10th - more thanmonth.A number of small communities along the Rio Grande west of the Lower Rio Grande Valley Flood Control System wereimpacted by the sprawling river into early August, while releases remained at 60,000 cubic feet per second at FalconInternational Reservoir until July 29th. These communities included locations in southwest Hidalgo County. The system oflevees and floodways (spillways) downstream of Penitas (where improved levees begin along the river itself) largely worked asdesigned, containing and diverting water along the river and associated floodways extending through southern and easternHidalgo County into extreme northern Cameron and extreme southern Willacy County. However, additional water damageoccurred to properties built inside the levees and floodways. Voluntary and mandatory evacuations were ordered for a numberof threatened communities; as of this writing, no fatalities had been reported directly from the high waters. There were dozensof water rescues on the river through the period, many of them trans migrants attempting to cross from Mexico into Texas.On August 3rd, President Obama declared most counties in the Rio Grande Valley a Major Disaster, eligible for federal fundingto assist with the longer term recovery. Deep South Texas Counties included Cameron and Hidalgo. Property and Cropdamages from the flood may ultimately total well over $50 million when all assessments are completed. As of the end of July,property damage estimates in Hidalgo County had reached $22 million. Crops planted in flood zones were destroyed by thelong duration of nutrient rich waters. Note: final damage cost estimated are provided in the July Storm Data report.TEXAS, South CentralBastrop County2 SE Bastrop 16 1745CST 0 0 0.00K Thunderstorm Wind (52EG)Thunderstorms produced wind gusts estimated at 60 mph. These winds blew out the windows of a CVS Pharmacy at theintersection of SH95 and SH71, caused major damage to the roof of the appraisal district building, moderate damage to the roofof the Bastrop County Sheriff's office, a gas leak from an air conditioning unit being damaged, and knocked down numeroustrees and power lines.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fayette County1 E West Pt 16 1758CST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)A thunderstorm produced wind gusts estimated at 65 mph which tore the roof off a house.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Williamson County1 SE Cedar Park 16 1817CST 0 0 25.00K 0.00K Thunderstorm Wind (56EG)A thunderstorm produced wind gusts estimated at 65 mph which caused the roof of the Lifetime Fitness Center to partiallycollapse.Deep tropical moisture from the remnants of tropical depression 5 produced a conditionally unstable atmosphere over SouthCentral Texas. Strong daytime heating and a weak frontal boundary combined with the instability to cause isolated severethunderstorms over the eastern part of South Central Texas. Note: The estimated wind gust of 56 knots is equivalent to 64mph.Bexar County1 ENE (SAT)San Antonio Int 24 1400CST 0 0 0.00K Thunderstorm Wind (50EG)A thunderstorm produced wind gusts estimated at 58 mph which knocked a tree onto a car, twisted traffic light, and knockedlarge tree limbs at the intersection of Wetmore and Bitters Roads in San Antonio.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Atascosa County4 E Rossville 24 1530CST 0 0 5.00K 0.00K Thunderstorm Wind (43EG)A thunderstorm produced wind gusts estimated at 50 mph which knocked down numerous tree limbs, peeled back the roof on ashed, and blew the skirting off a trailer home.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.439

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, South CentralBastrop County2 ESE Red Rock 24 1545CST 0 0 5.00K 0.00K Thunderstorm Wind (43EG)A thunderstorm produced wind gusts estimated at 50 mph which blew the roof off a shed, and blew part of the roof off a houseeast of Red Rock.Note: The estimated wind gust of 43 knots is equivalent to 49 mph.Bexar County1 WSW Terrel Hills 24 1618CST 0 1 0.00K 0.00K Thunderstorm Wind (52EG)A thunderstorm produced wind gusts estimated at 60 mph which knocked down a tree that struck and injured a woman atIncarnate Word University.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Hays County1 NW San Marcos Lowman Ar 24 1628CST 0 0 0.00K Thunderstorm Wind (50EG)A thunderstorm produced wind gusts estimated at 58 mph which knocked down numerous trees and damaged some roofs nearHunter Road and FM3407.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Travis County6 SE Austin 24 1715CST 0 0 0.00K Thunderstorm Wind (50EG)A thunderstorm produced wind gusts estimated at 58 mph at Austin Bergstrom International Airport. These winds bent a metalpost which supported a wind sock, knocked down a couple of trees and tree limbs, knocked down temporary fencing, and brokea 4â x 4â wooden post holding a satellite dish.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caldwell County7 SSE Tilmon 24 1735CST 0 0 0.00K Thunderstorm Wind (50EG)A thunderstorm produced wind gusts estimated at 58 mph which blew down a tree across Harwood Road one mile east ofFM1386.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Gonzales County1 ESE Waelder 24 1735CST 0 0 50.00K 0.00K Thunderstorm Wind (43EG)Strong thunderstorm winds, estimated at 50 mph, blew down several trees, large limbs, and produced roof damage on severalbuildings and homes. The damage was mainly found a few blocks either side of Highway 90 and east of Highway 97 nearWaelder.TEXAS, South PanhandleStrong daytime heating ahead of a weak cold front led to an unstable atmosphere over South Central Texas. When the coldfront moved into the area it caused isolated severe thunderstorms in the central part of the area. Note: The estimated wind gustof 43 knots is equivalent to 49 mph.Swisher CountyHappy 04 1613CST1619CST 0 0 0.00K 0.00K Hail (1.00)The public initially reported quarter size hail in Happy at 16:13 CST. The Happy Fire Department additionally reported quartersize hail along Interstate 27 south of Happy as the storm continued to move southward at 16:19 CST.Scattered convection developed over the southern Texas Panhandle and the northwestern South Plains during the late afternoonhours of the 4th. A storm became severe and produced large hail near Happy (Swisher County). No damage was reported.Parmer CountyFriona 05 1858CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)The KVII-TV Schoolnet measured a 60 mph thunderstorm wind gust in Friona shortly before 19:00 CST. No damages werereported.Scattered thunderstorms developed and moved over the extreme southwestern Texas Panhandle during the late evening hoursof the 5th. One storm became severe and produced a localized wind gust measured up to 60 mph at Friona (Parmer County).Note: The measured wind gust of 52 knots is equivalent to 60 mph.440

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, South PanhandleMotley County6 NNW Matador 09 1740CST 0 0 10.00K 0.00K Thunderstorm Wind (56EG)The Matador Fire Department reported that thunderstorm winds downed several utility lines along Texas Highway 70 north ofMatador.Scattered thunderstorms developed over the eastern South Plains and the Rolling Plains of west Texas during the late afternoonand early evening hours of the 9th. An isolated storm became severe and produced damaging winds in northern MotleyCounty. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hall County2 WSW Turkey 16 2100CST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)The Texas Tech University West Texas Mesonet site near Turkey measured a thunderstorm wind gust of 58 mph at 21:00 CST.No damage was reported.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Floyd County4 SSW Floydada 16 2115CST2120CST 0 0 0.00K 100.00K Thunderstorm Wind (56EG)A damage survey conducted by meteorologists from the Texas Tech University West Texas Mesonet revealed a swath ofdamage in agricultural fields south of Floydada and east of Texas Highway 207. Large corn stocks were completely blowndown by thunderstorm winds.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hale County8 W Abernathy 16 2210CST2229CST 0 0 20.00K 0.00K Thunderstorm Wind (61EG)Thunderstorm winds caused significant damage to a farmstead west of Abernathy around 22:10 CST. At least three lightweight metal barns were heavily damaged or destroyed. By 22:29 CST, the public estimated thunderstorm wind gusts in excessof 60 mph in Abernathy.Scattered thunderstorms developed along a stalled surface boundary over the extreme southwestern Panhandle during the lateafternoon hours of the 16th. A few of these initial storms displayed supercellular characteristics, but remained over open rangeland and no reports of severe weather were received. Later in the evening, the activity grew up-scale and spread east andsoutheastward over the northern South Plains. A small complex of storms resulted in an intermittent swath of damaging windsover portions of Hale and Floyd Counties. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Several large metal barns and agricultural shelters were destroyed by thunderstorm winds at a farmsteadin southwestern Hale County during the late evening hours of the 16th. Photo courtesy: Jennifer Ranger.Lubbock County1 NW Idalou 17 1642CST1650CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)441

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, South PanhandleA thunderstorm produced a swath of damaging winds from just northwest of Idalou along Farm to Market Road 1729 to Idalou.A large tree was reportedly blown down along that highway at 16:42 CST. Around 16:50 CST local authorities and the publicestimated thunderstorm winds in excess of 60 mph in Idalou. Numerous large tree limbs were downed in the city.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Garza CountySouthland 17 1712CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A National Weather Service cooperative observer estimated thunderstorm winds in excess of 60 mph in Southland. The windswere reportedly accompanied by a wall of dust. No damages were reported.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Childress CountyChildress 17 1815CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Local law enforcement officials reported that thunderstorm winds blew a deer stand across the parking lot of a business andacross U.S. Highway 287.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Cottle County5 S Paducah 17 1920CST 0 0 20.00K 0.00K Thunderstorm Wind (52EG)The Paducah Fire Department reported that thunderstorm winds downed utility lines along U.S. Highway 83 south of Paducah.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Stonewall County3 NE Aspermont 17 2120CST 0 0 25.00K 0.00K Thunderstorm Wind (67MG)The Texas Tech University West Texas Mesonet recorded a peak thunderstorm wind gust of 77 mph at 21:20 CST. TheStonewall County Judge reported that the winds downed several utility poles just east of Aspermont, and that electrical powerwas lost at several residences through the night.Scattered showers and thunderstorms developed over the central and eastern South Plains of west Texas, as well as over theeastern Panhandle, during the late afternoon and early evening hours of the 17th. Some of these storms became severe andproduced damaging winds. By late evening, a complex of convection evolved and tracked southeastward over the southernRolling Plains. This convection resulted in wind gusts as high as 77 mph which caused damage near Aspermont (StonewallCounty). Note: The measured wind gust of 67 knots is equivalent to 77 mph.Terry CountyBrownfield 20 1714CST1720CST 0 0 0.00K 0.00K Thunderstorm Wind (61MG)TEXAS, SoutheastA Skywarn storm spotter reported thunderstorm winds estimated to exceed 60 mph in Brownfield between 17:14 CST and17:18 CST. By 17:20 CST, the Texas Tech University West Texas Mesonet site just south of Brownfield measured a peak gustof 70 mph. No damages were reported.A small convective complex evolved over the southwestern South Plains during the late afternoon and early evening hours ofthe 20th. These storms produced wind gusts between 60 mph and 70 mph near Brownfield (Terry County). Note: Themeasured wind gust of 61 knots is equivalent to 70 mph.Jasper CountyJasper 10 1430CST 0 0 5.00K 0.00K Thunderstorm Wind (39EG)KJAS Radio reported an old but large tree feel onto a house on Powell Street in Jasper, damaging the roof and knocking off thefront porch awning.Note: The estimated wind gust of 39 knots is equivalent to 45 mph.Orange County1 S Peveto 10 1750CST 0 1 0.00K 0.00K LightningKJAS Radio and KFDM-TV reported an unidentified man was injured by a lightning strike at the Flying J Truck Stop onInterstate 10 at Highway 62 west of Orange.Scattered strong thunderstorms across southeast Texas produced one report of damaging winds and a lightning strike thatinjured a man.442

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, SoutheastJefferson County1 NW Beaumont 16 1240CST 0 1 25.00K 0.00K Thunderstorm Wind (52EG)The public and local media reported the tin metal roof was blown off Snowden Automotive on South MLK Jr. Parkway atCalder Road in downtown Beaumont, injuring one person and damaging several cars in the parking lot.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 WNW Pine Crest 16 1240CST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)KFDM-TV reported trees blown down on Helbig Road, with more than 4400 customers losing power in Jefferson County.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County2 W Voth 16 1245CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)KFDM-TV reported trees blown down on Carpenter Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Orange CountyVidor 16 1245CST 0 0 2.00K 0.00K Thunderstorm Wind (52EG)KFDM-TV reported more than 3600 Entergy customers lost power across Orange County.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson CountyPort Arthur 16 1330CST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Port Arthur Daily News reported large tree branches blown down in Port Arthur.A line of strong to severe thunderstorms moved southwest across southeast Texas during the afternoon hours on August 16,producing several reports of damaging winds. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson County1 N Guffey 17 1500CST1700CST 0 0 1.00K 0.00K Flash FloodKBMT-TV reported S MLK Jr. Parkway was closed around Lamar University due to underpass flooding.As Tropical Depression 5 moved northwest across Louisiana, strong thunderstorms rotating around the system produced flashflooding in Beaumont.Newton CountyTrout Creek 18 1438CST 0 0 0.00K 0.00K Funnel CloudSKYWARN spotter reported a funnel cloud visible from Highway 96 in Kirbyville to the east in Newton County.Orange CountyBridge City 19 1000CST 0 0 0.00K 0.00K Funnel CloudKBMT-TV reported a funnel cloud in Bridge City, which was confirmed by photos and video.Scattered thunderstorms associated with the outer fringes of Tropical Depression Five caused two tropical funnel clouds acrosssoutheast Texas.Jefferson County(BPT)Beaumont-Pt Art 23 1813CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Southeast Texas Regional Airport ASOS measured a wind gust of 60 mph.Note: The measured wind gust of 52 knots is equivalent to 60 mph.443

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, SoutheastJefferson CountyLa Belle 23 1830CST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Entergy reported over 1000 customers without power across Jefferson County, particularly in the Labelle and Hillebrandtcommunities.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Jefferson CountyFannett 23 1835CST 0 0 0.00K 0.00K Funnel CloudThe public and KBMT-TV reported a well defined funnel cloud to the west of Bayou Din Golf Course, which was confirmedby photos.A line of strong to severe thunderstorms developed and pushed southwest across lower southeast Texas during the evenignhours on August 23, causing some reports of high winds and a funnel cloud.TXZ181Jasper25 1500CST1700CST 0 0 1.0M 25.0K WildfireTEXAS, WestGusty northeast winds and low relative humidities aided the spread of two large wildfires near Lake Sam Rayburn Dam. Onefire occurred in the Audobon Hills neighborhood, while the other affected areas near and southwest of the Piney PointShopping Center. Five houses, a storage shed, an old boat storage facility, and a front-end loader were destroyed in the fire.Both fires together burned over 100 acres.Jeff Davis County10 NW Ft Davis 08 1330CST1335CST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)Note: The measured wind gust of 52 knots is equivalent to 60 mph.Jeff Davis County2 NW Ft Davis 09 1354CST1359CST 0 0 0.00K 0.00K Hail (1.00)Brewster County11 NE Alpine Terlingua Arp 09 1620CST1625CST 0 0 0.00K 0.00K Hail (1.00)Martin County10 WNW Tarzan6 E Lenorah09 2005CST2230CST 0 0 0.00K 0.00K Flash FloodAt 2005 CST, a spotter first reported 6 to 8 inches of flowing water over portions of SH 137, just north of SH 176, in MartinCounty. Water was also running over FM 846 east of SH 137. About an hour later, TXDOT closed SH 176 in Martin Countyfrom near the Martin County line east to the Howard County line. Several motorists were stranded in high water along thehighway.Intense surface heating beneath an upper level ridge resulted in unstable conditions across west Texas. This, combined with anembedded mid level shortwave trough passing overhead and surface convergence along a lee trough, resulted in scatteredthunderstorm development. Although the deep layer shear was fairly weak, a few storms managed to produce large amounts ofsmall hail and some quarter inch hail. In addition, the slow movement of the storms resulted in flash flooding in Martin CountyTexas.Presidio County5 WSW Presidio Big Bend Ar 15 1830CST1835CST 0 0 0.00K 0.00K Hail (1.00)An unseasonably moist environment developed near and south of the Davis Mountains of west Texas and when combined withdaytime heating, resulted in unstable conditions throughout the afternoon hours east of an upper level low across northernMexico. Although most of the activity remained below severe limits due to high freezing levels, one storm did manage toproduce severe hail.444

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, WestReeves CountyPecos 24 1536CST1630CST 0 0 0.00K 0.00K Flash FloodSeveral motorists were stranded in high water within the city of Pecos, TX.Pecos County3 NW Imperial Res 24 2005CST2040CST 0 0 0.00K 0.00K Flash FloodSeveral streets in Fort Stockton were impassable due to high water. State Highway 18 from Fort Stockton north to the countyline also had water flowing across it.Upton County8 NW Mc Camey24 2015CST3 SSW Mc Camey Upton Co Ar2330CST 0 0 0.00K 0.00K Flash FloodSeveral roadways were flooded within and near the city of McCamey, TX. Six inches of water was reported to be running overmany streets in McCamey. Some roadways, including State Highway 67, had at least 1 foot of flowing water over them. Nearthe end of the event, 2 feet of flowing water was reported on King Mountain Road 5 miles northeast of McCamey.TEXAS, Western NorthA cold front in the Davis Mountains and Big Bend region provided a focus for convection to develop. An abundance ofmoisture across the Trans Pecos and Davis Mountains combined with weak mid-level winds. This resulted in many showersand storms developing over the same region. The slow moving to stationary heavy rain eventually resulted in flash floodingalong the Trans Pecos region.Hardeman CountyGoodlett 21 1550CST1551CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)No damage was reported with the wind gust.A few thunderstorms developed ahead of a weak, slow-moving cold front and one briefly became severe. The winds gusted tonear 60 mph near Goodlett, although no damage was reported. Note: The estimated wind gust of 52 knots is equivalent to 60mph.Baylor CountySeymour Muni Arpt 31 1410CST1411CST 0 0 0.00K Thunderstorm Wind (56EG)Minor damage was reported at the airport. Monetary damage estimates were not available.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Wichita County2 W Burkburnett 31 1459CST1500CST 0 0 0.00K Thunderstorm Wind (56EG)Minor damage was reported to a trailer home. Other homes also had shingles blown off their roofs near the intersection ofHighway 240 and FM Road 369. Monetary damage estimates were not available.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Wichita CountyBurkburnett 31 1505CST1506CST 0 0 0.00K Thunderstorm Wind (56EG)Several power lines were downed across town, with one causing a structural fire. Monetary damages were not available.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Clay County3 WSW Charlie 31 1600CST1601CST 0 0 1.50K 0.00K Thunderstorm Wind (65EG)A wooden utility pole was blown down near the intersection of FM 171 and Linville Road. Monetary damage were estimated.445

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010TEXAS, Western NorthA hot and humid air mass continued over north Texas during the afternoon. Lift associated with a mid-level disturbancetraveling east from New Mexico contributed to thunderstorm development during the mid afternoon hours. As was the case forseveral days, most of the thunderstorms were more pulse-like, causing them to form, strengthen, and collapse over a shortamount of time. However, the downburst associated with the collapsing storm produced winds exceeding 60 mph over somelocations, along with extremely heavy rainfall. The strong winds caused some damage to trees, power lines/poles, and somestructures. Note: The estimated wind gust of 65 knots is equivalent to 75 mph.UTAH, EastUTZ022Southeast Utah01310000MST2359MST 0 0 0.00K 0.00K DroughtDrought conditions across eastern Utah were unchanged through the month, except for a sliver of southern San Juan Countythat improved to abnormally dry conditions.Grand County2 NE Potash9 NE Castle Valley04 1830MST2100MST 0 0 0.00K 0.00K Heavy RainThunderstorms produced up to 0.40 inches of rainfall in Moab. The slick rock and hard soil in this area resulted in some mudand rock runoff that slid over Highway 279 between mile marker 10 and 11 as well as over portions of Highway 128.Grand County6 SE Moab 04 1900MST 0 0 2.00K 0.00K LightningLightning struck and damaged a power pole south of Kerby Lane on the south side of Moab. This started a grass fire that wasquickly suppressed.Grand County4 WNW Moab 04 2000MST2230MST 0 0 0.00K 0.00K Flash FloodA normally dry wash behind the Arches National Park Visitor Center quickly filled with runoff from heavy rain and wasrunning 4 to 5 feet deep and 4 to 5 feet wide. Significant amounts of runoff also flowed through Courthouse Wash just west ofthe visitor's center.An unusually moist airmass across the area resulted in heavy rain producing thunderstorms over eastern Utah where saturatedsoils already existed, resulting in areas of flash flooding.Grand County10 SSW Elba Station 17 1300MST2000MST 0 0 0.00K 0.00K Flash FloodHeavy rainfall from the previous night well north of Arches National Park resulted in flash flooding in the afternoon and earlyevening within the Salt Wash drainage that runs though Arches National Park. Flood waters over a foot deep were flowingover the NPS road in the vicinity of Wolfe Ranch which leads to Delicate Arch. The road was closed to traffic for at least 7hours.Subtropical moisture produced heavy rainfall to the north of Arches National Park during the night of August 16 into August17th. Resultant runoff produced flash flooding downstream within Arches National Park during the afternoon of August 17th.Grand County21 W Potash 19 1258MST1600MST 0 0 2.50M 0.00K Flash FloodHeavy rainfall within a short period of time resulted in flash flooding across the heavily used Mineral Bottom Road. MineralBottom Road was deeply washed out in the switchback section and an extensive amount of debris covered the road, whichremained impassable as of mid September 2010. The road washout stranded 29 people who were airlifted by helicopter. TheKGJX WSR-88D radar estimated 1.86 inches of rain within 60 minutes in the source region of the Mineral Bottom Road flashflood. The NPS' Island-In-The-Sky visitors center personnel measured 1.05 inches of rain, most of which fell within a halfhour. Other locations in the area likely received flash flooding.446

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010UTAH, EastGrand County4 WNW Castle Valley 19 1315MST1530MST 0 0 0.00K 0.00K Flash FloodUTAH, West and CentralHeavy rainfall from an area of intense thunderstorms produced flash flood waters that crossed Highway 128 at a number oflocations between mile markers 8 and 14. Debris consisting mostly of mud up to two feet deep was deposited on the Highway.Monsoonal moisture resulted in strong thunderstorms which produced heavy rainfall, as well as hail and outflow winds thatapproached severe criteria.Utah County1 NNE Birdseye 01 1950MST2050MST 0 0 10.00K 0.00K Flash FloodHeavy rain over the Lake Fork burn scar caused a flash flood and debris flow, with Highway 89 being covered in water, mud,and rocks near Birdseye. The flood closed the highway in both directions between mile markers 305 and 307, and some carswere stuck in the debris.Kane County12 SE Alton11 NE Kanab02 1532MST1732MST 0 0 10.00K 0.00K Flash FloodHeavy rain caused flash flooding near the Skutumpah Road, damaging the road. As a result, rangers were cut off from travelingthroughout the Grand Staircase Escalante National Monument.Wayne County3 E Fruita6 WSW Notom02 1537MST1737MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding along the Scenic Drive of Capitol Reef National Park, including the Fremont River, SulphurCreek, the Grand Wash, and Capitol Gorge. People stranded in the Grand Wash had to be rescued.Kane County13 NW Paria 03 1215MST1815MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused the Paria River to increase from 20 cfs to 4000 cfs. Travel time on the flood was a little more than 6 hours,with the majority of the rain falling just southeast of Bryce Canyon National Park.Garfield County9 W Escalante 03 1400MST1500MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding in Alvey Wash, North Creek, and many other washes in the area.Wayne County5 NW Caineville12 NNE Torrey03 1410MST1540MST 0 0 0.00K 0.00K Flash FloodFlash flooding occurred at the headwaters of several creeks at the north end of Capitol Reef National Park, with the FremontRiver gauge at Caineville rising from 58 cfs to 700 cfs in one hour.Wayne County2 WNW Loa 03 1520MST 0 0 20.00K 0.00K Hail (1.00)Hail, that was estimated to be one inch in diameter, pitted cars traveling along SR-24 near Loa. This storm was slow moving,and 5 inches of hail accumulated in the same area. Several accidents were reported on the highway as the storm was overhead.Note that this storm also caused flash flooding in the area.447

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010UTAH, West and CentralWayne County10 WNW Loa10 W Fremont03 1530MST1730MST 0 0 0.00K 0.00K Flash FloodA slow moving thunderstorm produced very heavy rain, and caused flash flooding along SR-24 between Loa and Koosharem.There were several accidents on the highway as the storm was overhead. Note that this storm also produced severe hail.Kane County8 SW Adairville 03 1655MST1855MST 0 0 0.00K 0.00K Flash FloodFlash flooding was reported along House Rock Valley Road, as well as in Buckskin Gulch, in which water rose to 5 feet high.Sevier County1 N Koosharem 03 1735MST1935MST 0 0 0.00K 0.00K Flash FloodHeavy rain north of Koosharem caused a mudslide that blocked SR-62 near milepost 40. All lanes along the highway wereclosed until the slide could be cleaned up.Beaver County1 W Beaver 03 2030MST 0 0 0.00K 0.00K Hail (1.00)Hail measured to be one inch in diameter was reported in Beaver.Wayne County14 ENE Fremont15 NNW Caineville04 1240MST1410MST 0 0 30.00K 0.00K Flash FloodFlash flooding occurred in the Cathedral District on the north end of Capitol Reef National Park. The heavy rain made roadsimpassable and virtually destroyed them, leaving much of the area impassable until county road crews were able to rebuild theroads.Emery County6 SSW Mounds 04 1345MST1545MST 0 0 0.00K 0.00K Flash FloodThe Price River gauge rose from 50 cfs to 480 cfs. Widespread rainfall amounts of more than 2 inches in 3 hours were observedin the area.Salt Lake County1 W Riverton 04 1345MST 0 0 0.00K 0.00K Hail (0.75)Hail estimated to be 0.75 inches in diameter was reported near Riverton.Salt Lake County2 ESE Sandy City 04 1355MST 0 0 0.00K 0.00K Hail (0.75)Penny-sized hail, or hail of approximately 0.75 inches in diameter, was reported near Sandy.Utah County3 ENE American Fork 04 1405MST 0 0 0.00K 0.00K Hail (1.00)Hail stones ranging in size from 0.75 inches to 1 inch in diameter were reported near Highland.Emery County20 SSW Sphinx Siding20 SSW Green River04 1745MST1845MST 0 0 0.00K 0.00K Flash FloodState park rangers reported that heavy rains washed out roads in multiple locations north of Goblin Valley State Park.448

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010UTAH, West and CentralUtah CountyPleasant Grove 04 1805MST 0 0 0.00K 0.00K Hail (0.75)Hail with a diameter of 0.75 inches was reported in Pleasant Grove.The moist airmass that was in place at the end of July, remained in place into August, with widespread afternoon thunderstormsacross Utah. While flash flooding and severe thunderstorms were reported in both northern and southern Utah, the floodingprimarily occurred across the southern half of the State, whereas large hail and gusty winds were more common in northernUtah, where there was a better shear environment.Washington County5 ESE Bloomington2 SE St George05 1515MST1615MST 0 0 0.00K 0.00K Flash FloodHeavy rain at the headwaters of the Fort Pearce Wash, with an estimated total of over 3.5 inches of precipitation, caused flashflooding along the wash. The travel time to St. George was over 6 hours. The Fort Pearce gauge rose from zero to 680 cfs. Thegolf course attendant at St. George indicated the flood was the greatest he had seen in 6 years.Box Elder County11 S Lakeside 05 1645MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)The Lakeside Mountain Snownet sensor recorded a maximum wind gust of 62 mph.Note: The measured wind gust of 54 knots is equivalent to 62 mph.Tooele County3 ESE (DPG)Michael Aaf Dug 05 1805MST 0 0 0.00K 0.00K Thunderstorm Wind (59MG)The White Sage sensor in the Dugway Proving Ground mesonet recorded a maximum wind gust of 68 mph.Note: The measured wind gust of 59 knots is equivalent to 68 mph.Duchesne County1 SE Myton 06 1350MST 0 0 0.00K 0.00K Hail (1.00)Hail covered the ground near Myton, with the hail stones generally measuring one inch in diameter.Box Elder County3 SW Curlew Jct 06 1520MST 0 0 0.00K 0.00K Thunderstorm Wind (65MG)The Curlew Junction mesonet sensor recorded a maximum wind gust of 75 mph.Note: The measured wind gust of 65 knots is equivalent to 75 mph.Box Elder County13 ESE Kelton 06 1600MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)The Locomotive Springs sensor recorded a wind gust of 62 mph.Note: The measured wind gust of 54 knots is equivalent to 62 mph.Box Elder County8 NNE Lakeside 06 1630MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)A wind gust of 60 mph was recorded at the Gunnison Island sensor.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Box Elder County12 SSW Saline 06 1700MST 0 0 0.00K 0.00K Thunderstorm Wind (62MG)The Hat Island sensor recorded a maximum wind gust of 71 mph.Note: The measured wind gust of 62 knots is equivalent to 71 mph.449

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010UTAH, West and CentralKane County6 ESE Adairville10 SW Glen Canyon08 1500MST1700MST 0 0 0.00K 0.00K Flash FloodA very large flash flood occurred in the Buckskin Gulch and the Paria River. The river gauge further downstream, at Lee'sFerry in Arizona, recorded a rise on the Paria from 25 cfs to 5620 cfs in less than two hours.Kane County11 ESE Glen Canyon12 E Paria08 2200MST2330MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding on Wahweap Creek.The active monsoon season continued into the second week of August, with thunderstorms causing more flash flooding, largehail, and strong winds. The monsoon moisture that had been over Utah for nearly 3 weeks finally moved off to the east onAugust 8th.Garfield County10 WNW (U07) bullfrog/glen 16 1400MST1600MST 0 0 0.00K 0.00K Flash FloodFlash flooding occurred in numerous slot canyons in the Glen Canyon National Recreation Area, including Moody Wash, EastMoody Canyon, and Middle Moody Canyon. In addition, multiple roads were made impassable due to the flooding.Kane CountyBullfrog 16 1430MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)The Bullfrog Marina sensor recorded a maximum wind gust of 59 mph.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Cache County1 W Richmond 16 1730MST 0 0 35.00K 0.00K Thunderstorm Wind (50EG)Strong thunderstorm winds caused damage in Richmond, snapping trees and telephone poles.Kane County24 E Glen Cnyn Bsn Arpt14 W BullfrogNote: The estimated wind gust of 50 knots is equivalent to 58 mph.16 1745MST1915MST 0 0 10.00K 0.00K Flash FloodMultiple slot canyons were flooded on the western edge of Glen Canyon National Recreation Area, including Coyote Gulch.Roads were impassable near Coyote Gulch and Sunset Flats, and Hole-in-the-Rock road sustained damage.Garfield County24 W (U07) bullfrog/glen15 SSE Escalante Muni Arpt16 2000MST2130MST 0 0 10.00K 0.00K Flash FloodFlash flooding occurred in Twenty-five Mile Wash. In addition, roads were impassable in the surrounding area, includingdamage to Hole-in-the-Rock road, further north than the road was damaged earlier in the day.Sevier County28 ENE Burrville28 ESE Salina18 1200MST1300MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused a flash flood at the Ivie Creek rest area, located at mile post 87 along I-70, with water and debris flowinginto the rest area.Wayne County3 E Fruita4 WNW Notom18 1310MST1510MST 0 0 0.00K 0.00K Flash FloodFlash flooding occurred in Grand Wash in Capitol Reef National Park, with water 6 to 8 feet deep in Grand Wash, as well aswater from Grand Wash flowing across the Scenic Drive.450

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010UTAH, West and CentralIron County3 S Parowan Arpt 18 1315MST1515MST 0 0 0.00K 0.00K Flash FloodAfter 1.5 to 2.0 inches of rain fell near Parowan, flash flooding occurred on SR-143, with two feet of water and debris crossingthe road.Emery County17 SSW Green River 18 1445MST1645MST 0 0 0.00K 0.00K Flash FloodFlash flooding was reported southwest of Green River, with rainfall of up to 5 inches recorded in the area.Tooele County4 W Clover 18 1535MST1735MST 0 0 0.00K 0.00K Flash FloodHeavy rain over Johnson Pass caused mud and debris to flow across Highway 199, temporarily closing the road.Tooele County2 SE Dugway 18 2245MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)The English Village sensor in the Dugway Proving Ground mesonet recorded a wind gust of 59 mph.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Tooele County29 SW (DPG)Michael Aaf Dug 18 2335MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)The Fish Springs sensor in the Dugway Proving Ground mesonet recorded a maximum wind gust of 60 mph.Washington County7 NNE Zion Lodge4 SSE Zion National ParkNote: The measured wind gust of 52 knots is equivalent to 60 mph.19 0430MST0630MST 0 0 0.00K 0.00K Flash FloodFlash flooding occurred in the early morning hours along the North Fork of the Virgin River, with the gauge there rising from92 cfs to 1378 cfs in one hour.Salt Lake CountyCarters Sky Ranch Ar 19 1145MST1315MST 0 0 150.00K 0.00K Flash FloodHeavy rain caused a debris flow from the south end of the Corner Canyon burn scar, damaging about 20 homes with mud anddebris. Highland Drive was closed, and the police station, courts, and city hall were all flooded.Kane County13 E Kanab Arpt7 S Adairville19 1200MST1400MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding in Buckskin Gulch, with water flowing over nearby US-89.Wayne County13 ENE Fremont7 NNE Torrey19 1205MST1345MST 0 0 20.00K 0.00K Flash FloodHeavy rain caused flash flooding across the northern portions of Capitol Reef National Park, including Cathedral Valley,further damaging roads that were already in disrepair from previous flash flooding. In addition, several washes east of the parkwere flooded, and water was flowing over SR-24.451

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010UTAH, West and CentralEmery County30 SSE Moore34 SE Emery19 1330MST1530MST 0 0 0.00K 0.00K Flash FloodHeavy rain caused flash flooding in Little Wild Horse Canyon, with water there estimated to be 10 feet deep. Several roads inthe area were also washed out.Wayne County4 NNW Notom1 NNE Fruita19 1330MST1530MST 0 0 0.00K 0.00K Flash FloodFlash flooding occurred along the Scenic Drive of Capitol Reef National Park, as well as the Grand Wash and several roadsfurther south in the park.Garfield County11 WNW (U07) bullfrog/glen 19 1535MST1735MST 0 0 20.00K 0.00K Flash FloodMultiple roads at the southern end of Capitol Reef National Park were flooded and damaged, most notably the Notom-Bullfrogroad.Deep moisture returned to Utah on August 16th, picking up where it left off earlier in the month by causing widespread flashflooding and strong gusty winds.Summit County6 NE Castle Rock 22 1230MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)A 59 mph wind gust was measured at the Wasatch Hills sensor.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Tooele County2 WNW Stockton 22 1345MST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)The South Mountain sensor recorded a maximum wind gust of 58 mph.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Salt Lake CountySalt Lake No Two Arp 22 1400MST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)The West Jordan air quality sensor near Salt Lake City Airport #2 recorded a maximum wind gust of 58 mph.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Salt Lake County2 W Garfield 22 1403MST 0 0 0.00K 0.00K Thunderstorm Wind (54MG)The Great Salt Lake Marina sensor recorded a wind gust of 62 mph.Salt Lake County2 N (SLC)Salt Lake City2 N East Mill CreekNote: The measured wind gust of 54 knots is equivalent to 62 mph.22 1445MST1540MST 0 0 200.00K 0.00K Thunderstorm Wind (66MG)A strong line of thunderstorms moved through the Salt Lake Valley. Recorded wind gusts included 76 mph at the Salt LakeCity International Airport FAA sensor, 65 mph at the Salt Lake City International Airport ASOS, and 64 mph at the Baccus/SR-111 sensor. Damage from this thunderstorm included large trees knocked down in the Avenues neighborhood of Salt LakeCity, power poles knocked down along I-80 west of the Salt Lake City International Airport, and damage to the Airport fences,hangers, and signs.Davis CountyRandall2 ENE BountifulNote: The measured wind gust of 66 knots is equivalent to 76 mph.22 1500MST1535MST 0 0 100.00K 0.00K Thunderstorm Wind (56MG)A strong line of thunderstorms moved through the northern Wasatch Front, with maximum recorded wind gusts of 64 mph atthe Bountiful KSL sensor and 59 mph at the Centerville UDOT sensor. Power poles were knocked down along the LegacyHighway, causing a closure while crews repaired the damage.Note: The measured wind gust of 56 knots is equivalent to 64 mph.452

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010UTAH, West and CentralUTZ004-005Great Salt Lake Desert and Mountains/Wendover/Snowville - Southern Wasatch Front/Lehi/Provo/Nephi22 1535MST1755MST 0 0 0.00K 0.00K High WindAfternoon thunderstorms produced widespread strong winds across northern Utah. These winds caused damage near Salt LakeCity, as well as along the Legacy Highway in Farmington and Kaysville. The associated cold front that moved through Utahbehind these storms also caused strong post-frontal winds, particularly in the west desert and in the southern Wasatch Front.Kane County9 SSE Adairville 27 1300MST1500MST 0 0 0.00K 0.00K Flash FloodFlash flooding in Coyote Valley and Buckskin Gulch was reported by BLM backcountry rangers. Logs were removed that were10 feet overhead in the slots, and new pools of water had formed. In this event, the Buckskin Gulch flooding was primarily dueto rain that fell over Coyote Valley.Washington County4 SSW Zion National Park 27 1415MST1615MST 0 0 0.00K 0.00K Flash FloodFlash flooding occurred in Oak Creek Canyon in Zion National Park, with multiple waterfalls forming over the rim of a plateaunear the canyon.Washington County4 NNW Zion National Park3 W Zion Lodge27 2230MST2345MST 0 0 0.00K 0.00K Flash FloodFlash flooding occurred in portions of Zion National Park and the surrounding area, including in North Creek, Deep Creek, andthe North Fork of the Virgin River. An increase in flow of over 500 cfs was measured at the Virgin River gauge.Washington County2 E Zion National Park 28 0245MST0345MST 0 0 0.00K 0.00K Flash FloodYet another flash flood occurred on the North Fork of the Virgin River, which brought rocks and debris into the Upper Narrowsand created dangerous conditions in that area.UTZ016Southwest Utah/Cedar City/Milford29 1325MST1330MST 0 0 0.00K 0.00K High WindVERMONT, North and CentralA Pacific storm system moved through Utah near the end of August, with gusty synoptic scale winds and more flash floodingin southern Utah from associated thunderstorms.Caledonia County2 W Peacham 03 2035EST2036EST 0.14 50 0 0 25.00K 0.00K Tornado (EF0)Significant tree damage in a convergent pattern centered on the corner of Lanesboro and Foster Pond Road. Hundreds ofsoftwood trees downed, uprooted or snapped. A majority of the damage is from inflow into the circulation, the actual funnelappears to have traversed along tree top level.A stalled frontal boundary was draped across the Vermont/Canadian border during the afternoon and evening of August 3rd.South of the frontal boundary, maximum temperatures were in the 80s with dewpoints in the 60s creating a marginally unstableair mass.Numerous showers and thunderstorms with very heavy rainfall continuously traversed the boundary across Vermont/Canadianborder. However, an isolated super cell thunderstorm developed in Caledonia county and proceeded to move east acrossPeacham near Fosters Pond. Significant wind damage in the form of trees downed, uprooted and some snapped occurred with aconvergence debris field pattern indicative of a tornado.453

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VERMONT, North and CentralOrleans CountyWestmore 0304Apparent inflow damage just south of EF0 tornado track near the intersection of Lanesboro and FostersPond in Peacham, VT. Photo courtesy of Scott Whittier, WCM - NWS BTV.2300EST0100EST 0 0 25.00K 0.00K Flash FloodRunoff from heavy rains that fell the night of August 3rd caused flash flooding in areas along the east shore of LakeWilloughby. In Westmore, Mill Brook flooded Route 5A, damaged portions of Long Pond Road, and forced the evacuation ofseveral summer cabins located near the intersection of Long Pond Road and Route 5A. Water running off Mount Pisgahwashed debris onto Route 5A near the southern end of Lake Willoughby.Summer cabins surrounded by flood waters from Mill Brook near Route 5A in Westmore VT.Lamoille County2 NW Eden 04 0300EST0700EST 0 0 50.00K 0.00K FloodAn 8 foot diameter culvert was washed out by the Fryingpan Brook, and a motorist drove into the opening in the road and wasswept away. The pickup truck and its driver came to rest approximately 100 yards downstream of the washout, where he swamto safety. It is likely that the road was never actually overtopped, and instead eroded from below around the culvert.454

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VERMONT, North and CentralOrleans County1 SSW Orleans2 W EvansvilleCrooks Road washout at Fryingpan Brook in Eden VT. A pickup truck drove into the opening and was carrieddownstream approximately 100 yards. Photo: NWS.04 0700EST2000EST 0 0 2.00K 0.00K FloodRunoff from the previous night's rainfall flooded lowlands and portions of River Road and Messier road along the Barton Riverfrom Orleans north to Coventry. The USGS gage on the Barton River at Coventry Station Road crested at 1600 EST.Franklin CountyEast Fairfield2 ENE FairfieldInundated roads at the intersection of Messier Farm Rd, and River Road in Coventry VT. Photo: NWS.04 0745EST1200EST 0 0 0.00K 0.00K FloodRunoff from the previous nights rainfall caused Black Creek to flood local roads in Fairfield and Bakersfield. Portions of RyanRoad, and Elm Brook Road flooded, and water reached the edge of Route 36 between Fairfield village and East Fairfield.The flash flooding and flooding that occurred during the morning of August 4th was the result of two rounds of heavy rainfall.The first heavy rainfall event occurred during the afternoon and evening hours of August 2nd, with another bout of heavyrainfall that occurred during the night of August 3rd. Over 4 inches of rain fell over the two day period across northernVermont.455

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VERMONT, North and CentralWashington County1 NW Fayston 09 1630EST 0 0 0.00K 0.00K Hail (1.00)Hail up to quarter size in diameter reported.Washington County1 NW North Fayston 09 1630EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)VERMONT, SouthSeveral trees down as well as a power line on North Fayston road.A mid atmospheric disturbance combined with a moderately unstable air mass to promote the development of scatteredthunderstorms during the afternoon and evening of August 9th in Vermont. One isolated thunderstorm was strong enough toproduce hail up to one inch in diameter as well as a brief wind gust that knocked down trees in Fayston. Note: The estimatedwind gust of 50 knots is equivalent to 58 mph.VTZ013Bennington22 1900EST2100EST 0 0 0.00K High WindA slow moving low pressure system tracked eastward across the southern tier of New York State and northern PennsylvaniaSunday, August 22nd, during the afternoon and evening hours and passed south of Long Island Sunday night.Strong and gusty east to southeast winds occurred across southern Vermont, with the higher terrain of the southern GreenMountains being impacted the hardest.VIRGINIA, EastLouisa County2 E Cutalong 04 1922EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed south of Gordonsville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fluvanna County1 ESE Palmyra 04 1930EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed across Fluvanna county in Lake Monticello, Palmyra, Wilmington, and Kents Store.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Goochland County3 WNW Fife 04 2015EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed across the road near the intersection of Old Columbia Road and Elk Island Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cumberland County1 NNE Cumberland 04 2020EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed across the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Amelia County1 ENE Chula 04 2045EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large pine tree was down in the Chula community.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mecklenburg County1 E Boydton 04 2115EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed in and around the town of Boydton.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.456

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, EastNew Kent CountyNew Kent 04 2150EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed across Highway 33 in central New Kent county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Brunswick CountyBrunswick 04 2155EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.New Kent County2 W Plum Pt 04 2200EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed in Ridgewood along Highway 33. Power outages were reported in Eltham.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Southampton County1 SE Courtland 04 2235EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed along Governor Darden Road and Darden Scott Road.Scattered severe thunderstorms associated with a weak trough of low pressure produced damaging winds across portions ofcentral and south central Virginia. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Powhatan County4 SE Jefferson 05 1603EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Tree was downed onto power lines on Janet Lane.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mecklenburg County1 S Blanks 05 1615EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Powhatan County1 NW Powhatan 05 1629EST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail was reported near Powhatan at U.S. 60 and U.S. 522.Cumberland County1 NNE Cumberland 05 1630EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed along Stony Point Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Prince Edward County4 SSE Farmville Muni Arpt 05 1634EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed throughout the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Newport News (c) CountyPatrick Henry Fld 05 1639EST 0 0 1.00K 0.00K Thunderstorm Wind (57MG)Wind gust of 57 knots (66 mph) was measured at PHF.Note: The measured wind gust of 57 knots is equivalent to 66 mph.Nottoway County1 N Burkeville 05 1645EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.457

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, EastYork County1 SSE Grafton 05 1645EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Tree was downed and crushed a trailer.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mecklenburg CountySouth Hill 05 1650EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Tree was downed onto a house in South Hill.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Nottoway County1 N Jennings Ordinary 05 1650EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Richmond County45 WSW Wellford 05 1700EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large tree was downed on Grove Avenue.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Brunswick CountyBrunswick 05 1705EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed throughout the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lunenburg County1 NE Victoria 05 1705EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mecklenburg County1 W Chase City 05 1710EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were downed on Skippers Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mecklenburg County1 N Clarksville Marks Ar 05 1714EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Tree was downed on a house on Meriweather Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Amelia County1 N Ammon 05 1715EST 0 0 1.00K 0.00K Thunderstorm Wind (56MG)Large tree branches were downed onto a house.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Lunenburg County1 ESE Kenbridge 05 1715EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed across the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Prince Edward County4 N Briery 05 1715EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large Oak tree was downed just off of County Road 604 just east of Albilene in southwest Prince Edward county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.458

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, EastChesterfield County1 E Winterpock 05 1730EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed onto power lines with several associated structural fires in central and western Chesterfield county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Dinwiddie County1 NE Mc Kenney 05 1730EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed countywide.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Middlesex County1 E Saluda Hummel Arpt 05 1733EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed on Carlton Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greensville County4 ESE Purdy 05 1745EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed near the intersection of Allen Road and Orion Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Prince George County3 NW Disputanta 05 1750EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed with road closures at Prince George Drive at Highway 460.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Prince George County1 N Disputanta 05 1755EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large tree was downed across a yard along Hines Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charles City (c) County1 N Charles City 05 1800EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed throughout the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Gloucester County1 N Gloucester Arpt 05 1800EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed near Gloucester courthouse.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greensville County3 SE Kingsberry 05 1801EST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail was reported just east of Emporia.Sussex County4 N Wakefield Arpt 05 1810EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were downed near the intersection of Highway 31 and Route 604.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.King And Queen County1 SSW Cologne 05 1815EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed onto power lines at Jonestown Road and Stratton Major Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.459

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, EastJames City County1 E Toano 05 1820EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Siding was blown off a house in Toano.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.James City County1 SSE Five Forks 05 1825EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed throughout the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Newport News (c) County2 SW (FAF)Felker Aaf Ft E 05 1825EST 0 0 1.00K 0.00K Thunderstorm Wind (51MG)Wind gust of 51 knots (59 mph) was measured at FAF.Note: The measured wind gust of 51 knots is equivalent to 59 mph.James City County2 SE Grove 05 1830EST 0 5 1.00K 0.00K Thunderstorm Wind (50EG)Debris was blown onto track of roller coaster. Five people were injured.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Prince George County2 NW Brandon 05 1833EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large tree limbs were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Newport News (c) CountyPatrick Henry Fld 05 1833EST 0 0 1.00K 0.00K Thunderstorm Wind (50MG)Wind gust of 50 knots (58 mph) was measured at PHF.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Isle Of Wight County2 SSE Smithfield 05 1835EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed across the county including near Scotts Factory Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Accomack County1 W Melfa 05 1840EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed throughout the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.York County1 E Yorktown 05 1843EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Three trees were downed in Yorktown on Highway 17.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hampton (c) County5 NE Hampton 05 1850EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed onto power lines on Woodland Road in Fox Hill section of Hampton.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Norfolk (c) County2 SE (NGU)Nas Norfolk 05 1905EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were downed on Galveston Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.460

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, EastPortsmouth (c) County5 NW Portsmouth 05 1915EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Tree was downed onto a residence in the Churchland section of Portsmouth.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Chesapeake (c) County1 W Pentress 05 1945EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed onto power lines on Fairfield Drive.Scattered severe thunderstorms well in advance of a cold front produced damaging winds and large hail across portions ofcentral and eastern Virginia. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caroline County3 NNW Upper Zion 12 1539EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed on Route 301.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caroline County1 W Oak Corner 12 1540EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caroline CountyBowling Green 12 1543EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caroline County1 S Sparta 12 1543EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed near Jefferson Davis Highway at Ladysmith.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Caroline County2 ENE Ladysmith 12 1553EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Powhatan County3 NNE Moseley 12 1600EST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail was reported.Louisa County1 S Orchid 12 1600EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed at Cartersville Road and Route 522.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Powhatan County1 E Flat Rock 12 1600EST 0 0 15.00K 0.00K Thunderstorm Wind (50EG)National Weather Service confirmed there was straight line wind damage in the town of Flat Rock along Route 60 andintersections of Dorsett Road and Shroder Road. Wind damage path was a half mile wide and two miles long. Large trees andnumerous other trees were knocked down and lying down pointing in the same direction. Stack of steel bush hogs were blownover. Roof of the Flat Rock tire store was partially torn off. Barn roof was peeled off on north side of building. Box trailers 15to 18 feet long were blown over. Communication tower was knocked over.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.461

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, EastPowhatan County1 N Flat Rock 12 1605EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed on Route 60.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.King William County2 WSW Beulahville 12 1630EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hanover County1 E Coatesville 12 1636EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.King William County2 S Etna Mills 12 1640EST 0 0 0.00K 0.00K Hail (1.75)Golf ball size hail was reported.King William County2 WSW Manquin 12 1640EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Damage was reported behind hardware store on Route 360.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.King William County1 WSW Aylett 12 1641EST 0 0 0.00K 0.00K Hail (1.75)Golf ball size hail was reported.Hanover County1 N Hanover 12 1648EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.King William County2 WSW Manquin 12 1650EST 0 0 0.00K 0.00K Hail (1.75)Golf ball size hail was reported.Hanover County2 NNE Mechanicsville 12 1650EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were downed in the Black Creek area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hanover County2 WSW Rural Pt 12 1651EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hanover County2 WSW Rural Pt 12 1700EST 0 0 0.00K 0.00K Hail (1.75)Golf ball size hail was reported.Henrico County6 SE Lewis Gardens 12 1704EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was snapped near the base on Charles City Road. Tree fell and damaged a fence.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.462

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, EastHanover County2 E Old Cold Harbor 12 1708EST 0 0 0.00K 0.00K Hail (2.00)Hen egg size hail was reported.Henrico CountyLewis Gardens 12 1708EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed in the neighborhood of Old Cannon Estates off Elko Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hanover County2 NNE Mechanicsville 12 1714EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed at the intersection of Bell Creek Road and Pole Green Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Hanover County3 S Studley 12 1714EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed at the intersection of Route 60 and Walnut Grove Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Henrico County1 NNE Fair Oaks 12 1715EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed and power was out at the intersection of Airport Drive and Interstate 295.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.New Kent County1 NW Quinton 12 1720EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed blocking Sherwood Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charles City (c) County1 NNE Chrls Cty Brkely Arp 12 1745EST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated between 60 and 65 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Charles City (c) County1 W Barnetts 12 1745EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed on Wayside Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Nottoway County1 NW Wellville 12 1745EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed on Poplar Lawn Road and also on Route 460.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Brunswick County4 NNE Danieltown 12 1805EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed across part of a road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Brunswick County5 NNE Danieltown 12 1810EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed along Lew Jones Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.463

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, EastSussex County4 N Newville 12 1810EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed along Route 460 near the Prince George/Sussex County line.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Sussex County2 W Waverly 12 1815EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed on Route 40.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Brunswick County3 NNW Alberta 12 1820EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Tree was downed across Flat Rock Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Southampton County3 SW Sedley 12 1900EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed on Governor Darden Road in Sedley.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Southampton County4 ESE Drake Corners 12 1915EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were downed on Smiths Ferry Road or U.S. Route 258.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Brunswick County1 SW Alberta 12 1939EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)VIRGINIA, Extreme SouthwestTrees were downed onto power lines.Scattered severe thunderstorms associated with a cold front produced damaging winds and large hail across portions of centraland south central Virginia. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wise CountyWise 04 1715EST1720EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported a few trees downed by thunderstorm winds in the city of Wise.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Wise County3 NW Coeburn 04 1800EST1805EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported 3 trees downed by thunderstorm winds northwest of Coeburn.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Russell County2 NW Honaker 04 1900EST1905EST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported 2 trees downed by thunderstorm winds near Honaker.A boundary across the area triggered isolated severe thunderstorms during the late afternoon and evening hours. Note: Theestimated wind gust of 55 knots is equivalent to 63 mph.464

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, Extreme SouthwestScott County5 W Gate City 05 1240EST1242EST 0 0 5.00K 0.00K Thunderstorm Wind (54EG)A trained spotter reported several trees downed by thunderstorm winds 5 miles west of Gate City.Note: The estimated wind gust of 54 knots is equivalent to 62 mph.Scott County5 W Gate City 05 1240EST1242EST 0 0 1.00K 0.00K Thunderstorm Wind (54MG)A trained spotter reported a thunderstorm wind gust to 62 mph (54 knots) 5 miles west of Gate City.Note: The measured wind gust of 54 knots is equivalent to 62 mph.Bristol (c) CountyBristol 05 1320EST1325EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)A trained spotter reported numerous large and small branches and limbs downed by thunderstorm winds in the City of Bristol.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Washington County7 S Abingdon 05 1332EST1335EST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported a couple of trees downed by thunderstorm winds along South Holston Lake.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Lee CountyEwing 05 1410EST1415EST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)Law enforcement personnel reported 2 trees downed by thunderstorm winds in Ewing.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Lee CountyBlackwater 05 1415EST1417EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Law enforcement personnel reported 1 tree downed by thunderstorm southeast of Jonesville at Black Water.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wise County2 ENE Coeburn 05 1541EST1542EST 0 0 1.00K 0.00K Thunderstorm Wind (52EG)A trained spotter reported an estimated thunderstorm wind gust at 60 mph (52 knots) near Coeburn.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Wise County2 ENE Coeburn 05 1541EST1545EST 0 0 3.00K 0.00K Thunderstorm Wind (52EG)A trained spotter reported several large tree limbs downed on roads by thunderstorm winds near Coeburn.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.465

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, Extreme SouthwestWise CountyCoeburn 05 1545EST1555EST 0 0 15.00K 0.00K Thunderstorm Wind (52EG)The Kingsport Times News newspaper reported trees, large tree limbs, debris and few powerlines downed on roads bythunderstorm winds in Coeburn, Norton and Wise.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Russell County1 SSE Dante 05 1554EST1600EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported several trees downed by thunderstorm winds on Route 63 near Dante.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Washington County1 W Abingdon 05 1605EST1610EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Law enforcement personnel reported several trees downed by thunderstorm winds across the western portions of the county.A boundary across the area triggered isolated severe thunderstorms during the afternoon and evening hours. Note: Theestimated wind gust of 55 knots is equivalent to 63 mph.Washington County2 N Abingdon 17 1700EST1900EST 0 0 10.00K 0.00K Flash FloodBroadcast media personnel reported numerous roads closed countywide for flooding from slow moving thunderstorms.Bristol (c) County1 N Bristol 17 1700EST1900EST 0 0 20.00K 0.00K Flash FloodBroadcast media personnel reported numerous roads closed for flooding from slow moving thunderstorms.Scott County1 N Weber City 17 1900EST2200EST 1 0 0.00K 0.00K Flash FloodLaw enforcement personnel reported heavy rain from a slow moving thunderstorm in Weber City caused a 16 year old male tobe swept away into flood waters and drowned. M16IWScott County1 N Weber City 17 1930EST2130EST 0 0 10.00K 0.00K Flash FloodLaw enforcement personnel reported heavy rain from a slow moving thunderstorm in Weber City resulted in a foot of wateracross Yuma Road.Scott County5 N Gate City 17 1930EST2130EST 0 0 10.00K 0.00K Flash FloodLaw enforcement personnel reported heavy rain from a slow moving thunderstorm caused Alley Valley Road north of GateCity to be washed out.Scott County9 WNW Gate City1 ESE Glenita17 1930EST2130EST 0 0 10.00K 0.00K Flash FloodLaw enforcement personnel reported heavy rain from a slow moving thunderstorm caused Manville Road northwest of GateCity to be washed out.A boundary across the region triggered isolated slow moving thunderstorms over the area resulting in flooding in a fewlocations. One person was swept away in flood waters and drowned.466

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, Extreme SouthwestScott County2 W Ft Blackmore 19 1415EST1615EST 0 0 30.00K 0.00K Flash FloodLaw enforcement personnel reported numerous roads flooded countywide from slow moving thunderstorms. Six families wereevacuated in the Fort Blackmore area near Big Stony Creek.A boundary across the area produced isolated flooding reports from slow moving thunderstorms during the afternoon hours.VIRGINIA, NorthHighland CountyBlue Grass 04 1740EST 0 0 0.50K Thunderstorm Wind (50EG)A tree was down on the road in Blue Grass.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Frederick CountyClowser Gap 04 1748EST 0 0 Thunderstorm Wind (63MG)A wind gust of 73 mph was measured from a home weather kit about eight miles west of Winchester.Note: The measured wind gust of 63 knots is equivalent to 72 mph.Shenandoah County1 NE Strasburg 04 1751EST 0 0 5.00K Thunderstorm Wind (52EG)Trees were down near Strasburg.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Shenandoah County4 SE Strasburg 04 1755EST 0 0 5.00K Thunderstorm Wind (52EG)Trees were down near near Fort Valley.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Winchester (c) County3 N Winchester 04 1756EST 0 0 5.00K Thunderstorm Wind (61EG)Trees were down along multiple roads in Winchester.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Shenandoah CountyNew Market 04 1805EST 0 0 3.00K Thunderstorm Wind (52EG)Trees were down in New Market.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Harrisonburg (c) County1 SSW Harrisonburg 04 1814EST 0 0 Thunderstorm Wind (53MG)A wind gust of 61 mph was measured at Harrisonburg.Note: The measured wind gust of 53 knots is equivalent to 61 mph.Loudoun County1 WSW Bluemont 04 1820EST 0 0 1.00K Thunderstorm Wind (52EG)A tree ten inches in diameter was down in a driveway at Bluemont.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fauquier CountyAda 04 1823EST 0 0 12.00K Thunderstorm Wind (56EG)At least a dozen reports were in for trees down across northern Fauquier County.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.467

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthNelson County1 ENE Afton 04 1830EST 0 0 5.00K Thunderstorm Wind (52EG)Trees were down across the northeastern portion of the county.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Culpeper CountyRixeyville 04 1840EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down in Rixeyville along Rixeyville Road. .Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Culpeper County2 SW Reva 04 1840EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on the Duncan Trail.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Orange County2 NW Eheart 04 1901EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on Route 33 near Greene County.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fauquier County1 W Morrisville 04 1904EST 0 0 12.00K Thunderstorm Wind (56EG)At least a dozen reports of trees were down across southern Fauquier County.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Orange County1 SSE Barboursville 04 1909EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on Winery Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Orange County1 E Old Somerset 04 1911EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on Route 20 near Montpelier.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Spotsylvania County2 ESE Wilderness Corner 04 1919EST 0 0 1.00K Thunderstorm Wind (56EG)A tree was down at the intersection of Orange Plank Road and Herndon Road.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Spotsylvania County2 WNW Snell 04 1936EST 0 0 1.00K Thunderstorm Wind (50EG)A tree was down at the intersection of Courthouse Road and Red Feather Lane.High pressure over the Atlantic Ocean continued to pump in hot and humid air over the Mid-Atlantic. A series of upper-leveldisturbances in the jet stream passed through Virginia triggering showers and thunderstorms during this time. There wasenough instability from the hot and humid air for some thunderstorms to contain damaging winds during the afternoon andevening hours. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockingham County1 SW Massanetta Spgs 05 1315EST 0 0 Hail (1.00)Quarter size hail was reported about three miles east of Pleasant Valley.468

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthRockingham County1 SW Massanetta Spgs 05 1320EST 0 0 2.00K Thunderstorm Wind (52EG)Trees were down at Spaders Church Road and Port Republic Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fauquier County4 NNE Rectortown 05 1335EST 0 0 3.00K Thunderstorm Wind (52EG)Numerous limbs and trees of six inches in diameter were down along route 713 south of Route 50.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Loudoun County2 E Middleburg 05 1342EST 0 0 3.00K Thunderstorm Wind (52EG)Trees were down just north of Middleburg.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fauquier County3 NW Halfway 05 1346EST 0 0 1.00K Thunderstorm Wind (52EG)A large tree was down on Zulla Road just south of Route 50.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Rappahannock County1 W Roundhill 05 1350EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on Quaintance Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Greene CountyStandardsville 05 1353EST 0 0 3.00K Thunderstorm Wind (50EG)A few trees were down in Stanardsville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Culpeper County1 N Boston 05 1358EST 0 0 3.00K Thunderstorm Wind (56EG)Multiple trees were down along Sperryville Pike near Slate Mills road.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Culpeper County2 NE Boston 05 1400EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on Hazeland Lane.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Culpeper CountyReva 05 1404EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on Griffinsburg Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Culpeper County2 NE Cordova 05 1405EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on Dutch Hollow Road.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fairfax County2 WSW Johnsons Corner 05 1414EST 0 0 Thunderstorm Wind (52MG)A wind gust of 60 mph was reported in Sudley.Note: The measured wind gust of 52 knots is equivalent to 60 mph.469

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthFairfax County1 SE Vienna 05 1418EST 0 0 5.00K Thunderstorm Wind (56EG)Trees were down at the Vienna Woods Pool.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Fairfax County1 S Burke 05 1424EST 0 0 3.00K Thunderstorm Wind (50EG)Large branches were snapped along Route 644 from Burke to Springfield.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fairfax County1 S Chesterbrook Gardens 05 1425EST 0 0 20.00K Thunderstorm Wind (52EG)A tree fell onto a home and car on the 700 Block of Tower Street. Two residents were injured.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Arlington County1 SW Arlington 05 1432EST 0 0 1.00K Thunderstorm Wind (56EG)A large tree was down near Baileys Crossroads.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Arlington County2 SSW Rosslyn 05 1435EST 0 0 1.00K Thunderstorm Wind (56EG)A large tree was down and it blocked South Stafford Street in Shirlington.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Arlington County1 W Rosslyn 05 1438EST 0 0 Thunderstorm Wind (60MG)A wind gust of 69 mph was measured in northwest Arlington.Note: The measured wind gust of 60 knots is equivalent to 69 mph.Arlington County2 SSW Rosslyn 05 1440EST 0 0 35.00K Thunderstorm Wind (61EG)Fifty trees were down in the Fairlington sections of Arlington.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Alexandria (c) County2 E Alexandria 05 1440EST 0 0 10.00K Thunderstorm Wind (75EG)Windows were blown out of a coffee shop and trees 20-30 feet tall were down on Slaters Lane.Note: The estimated wind gust of 75 knots is equivalent to 86 mph.Alexandria (c) County1 NNW Potomac Yard 05 1440EST 0 0 Thunderstorm Wind (52MG)A wind gust of 60 mph was measured at the intersection of 395 and Quaker Lane.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Alexandria (c) County1 E Alexandria 05 1440EST 0 0 15.00K Thunderstorm Wind (78EG)Numerous trees were down in the Del Ray section of Alexandria.Note: The estimated wind gust of 78 knots is equivalent to 90 mph.470

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthAlexandria (c) County2 E Alexandria 05 1440EST 0 0 5.00K Thunderstorm Wind (75EG)Trees were down on George Washington Parkway forcing its closer near Slaters Lane.Note: The estimated wind gust of 75 knots is equivalent to 86 mph.Alexandria (c) County1 E Potomac Yard 05 1440EST 0 0 10.00K Thunderstorm Wind (78EG)Trees and power lines were down on Monticello Boulevard.Note: The estimated wind gust of 78 knots is equivalent to 90 mph.Arlington County2 SSW Rosslyn 05 1441EST 0 0 15.00K Thunderstorm Wind (60MG)Numerous large branches were down near Barcroft. A piece of siding was also torn off a house.Note: The measured wind gust of 60 knots is equivalent to 69 mph.Arlington County2 SSW Rosslyn 05 1442EST 0 0 Thunderstorm Wind (57MG)A wind gust of 66 mph was reported near Barcroft.Note: The measured wind gust of 57 knots is equivalent to 66 mph.Alexandria (c) County1 ESE Alexandria 05 1442EST 0 0 Thunderstorm Wind (58MG)A wind gust of 67 mph was measured in Alexandria.Note: The measured wind gust of 58 knots is equivalent to 67 mph.Arlington County2 SSE South Washington 05 1445EST 0 0 Thunderstorm Wind (51MG)A wind gust of 59 mph was reported at Reagan National Airport.Note: The measured wind gust of 51 knots is equivalent to 59 mph.Spotsylvania County1 SSW Wilderness Corner 05 1510EST 0 0 Hail (1.00)Quarter sized hail was reported on Stockade Drive near Cookstown.Nelson County2 NE Norwood 05 1520EST 0 0 5.00K Thunderstorm Wind (56EG)Numerous trees were down east of Gladstone to Shipman.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Spotsylvania County1 NNW Chancellor 05 1522EST 0 0 Hail (1.25)Half dollar sized hail was reported on Elmwood Drive near Chancellorsville.Augusta County1 WSW Churchville 05 1525EST 0 0 1.00K Thunderstorm Wind (50EG)A tree was down on the road near Churchville.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Staunton (c) County1 NE Staunton 05 1525EST 0 0 2.00K Thunderstorm Wind (50EG)Two trees were down in the northwestern portion of Staunton.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.471

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthSpotsylvania County1 SW Five Mile 05 1528EST 0 0 Hail (1.00)Quarter size hail was reported near Chancellorsville.Spotsylvania County1 S Five Mile 05 1530EST 0 0 Hail (1.00)Quarter size hail was reported near near Fredericksburg.Loudoun County1 ENE Dover 05 1613EST 0 0 2.00K Thunderstorm Wind (52EG)Trees were down along Route 50 near Aldie.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Charlottesville (c) County1 NW Charlottesville 05 1620EST 0 0 5.00K Thunderstorm Wind (56EG)Several trees were down in the western parts of Newcomb Hall.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Charlottesville (c) County1 ENE Charlottesville 05 1622EST 0 0 5.00K Thunderstorm Wind (56EG)Multiple trees were down across the county.A hot and humid air mass remained over Virginia on the 5th. A series of upper-level disturbances in a zonal flow passedthrough the Mid-Atlantic during this time. Showers and thunderstorms developed during the afternoon and evening hours.There was enough instability from the hot and humid air mass for some thunderstorms to contain damaging winds and largehail. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Fairfax County1 E Pender 05 1645EST1745EST 0 0 0.00K 0.00K Flash FloodExit off Route 50 in vicinity of Fair Oaks Mall was impassable due to flowing water. A spotter in the area observed 2.50 inchesof rain.A trough of low pressure in advance of a cold front moving southeastward toward the Mid-Atlantic provided the lift to producethunderstorms in a highly moist and unstable atmosphere. These thunderstorms dropped locally heavy rainfall, which caused anisolated flash flood in the western suburbs of metropolitan Washington.Orange County1 NW Thornhill 05 1654EST 0 0 1.00K Thunderstorm Wind (50EG)Large tree limbs were down near the intersection of Marquis Road and Double W. Farm Road.A hot and humid air mass remained over Virginia on the 5th. A series of upper-level disturbances in a zonal flow passedthrough the Mid-Atlantic during this time. Showers and thunderstorms developed during the afternoon and evening hours.There was enough instability from the hot and humid air mass for some thunderstorms to contain damaging winds and largehail. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Clarke County6 ESE Berryville 12 1330EST 0 0 1.00K Thunderstorm Wind (52EG)A large tree was down along Route 7 near Mountain Ridge Lane.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Loudoun County1 SW Bluemont 12 1333EST 0 0 1.00K Thunderstorm Wind (52EG)A large tree was down along Route 7 between Williams Gap Road and Snickersville Turnpike.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.472

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthLoudoun County1 E Middleburg 12 1350EST 0 0 1.00K Thunderstorm Wind (52EG)Large branches and power lines were down on US 50 west of Middleburg.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Loudoun County2 E Middleburg 12 1350EST 0 0 0.50K Thunderstorm Wind (50EG)Tree limbs were down near Middleburg.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fauquier County3 WNW Halfway 12 1354EST 0 0 2.00K Thunderstorm Wind (50EG)Trees and wires were down about two miles northwest of Halfway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fauquier County1 WSW Halfway 12 1355EST 0 0 2.00K Thunderstorm Wind (50EG)Several trees and wires were blown down near Halfway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Loudoun County1 SE Sunny Bank 12 1358EST 0 0 2.00K Thunderstorm Wind (56EG)Several trees were down along highway 50 between Middleburg and Aldie.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Fauquier CountyHopewell 12 1400EST 0 0 3.00K Thunderstorm Wind (56EG)Several trees were down near The Plains.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Fauquier County1 NE Turnbull 12 1405EST 0 0 2.00K Thunderstorm Wind (56EG)Several trees were blown near Turnbull.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Loudoun County2 SSW Bloomfield 12 1406EST 0 0 3.00K Thunderstorm Wind (56EG)A tree fell down onto a fence. the tree was twelve inches diameter.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Prince William County1 SW Haymarket 12 1420EST 0 0 1.00K Thunderstorm Wind (52EG)A large tree was down in the Haymarket area.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fauquier County1 WNW Remington 12 1424EST 0 0 15.00K Thunderstorm Wind (56EG)A tree fell into a home at Remington.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Culpeper CountyElkwood 12 1430EST 0 0 Thunderstorm Wind (50EG)A few branches of two inches in diameter were down near Elkwood.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.473

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthCulpeper County1 SSW Kellys Ford 12 1439EST 0 0 Hail (1.50)Ping pong ball sized hail was reported near Sumerduck.Culpeper County1 SSW Kellys Ford 12 1439EST 0 0 1.00K Thunderstorm Wind (61EG)Tree limbs about four inches in diameter were blown down near Sumerduck.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Prince William County2 WSW Minnieville 12 1448EST 0 0 2.00K Thunderstorm Wind (52EG)Trees were down on Rexburg Court near Rhode Island Drive.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Stafford County1 S Stafford 12 1452EST 0 0 Hail (1.00)Hail up to quarters in size was reported along Dishpan Lane near Brooke.Culpeper County1 SSW Richardsville 12 1453EST 0 0 Hail (2.00)Hail two inches in diameter was reported on Halls Road near Richardsville.Culpeper County1 SSW Richardsville 12 1453EST 0 0 5.00K Thunderstorm Wind (61EG)Numerous large limbs were blown off in very strong winds along Halls Road.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Spotsylvania County1 S Wilderness Corner 12 1510EST 0 0 1.00K Thunderstorm Wind (56EG)A large tree was down near the intersection of Brock Road and Orange Plank Road.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Stafford CountyWhite Oak 12 1510EST 0 0 10.00K Thunderstorm Wind (61EG)A track of patchy damage was noted from near the Stafford County Landfill to Deshazo Lane. Trees were snapped and a clusterof shingles was removed from the roof of a house.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Spotsylvania County1 NNE Alsop 12 1525EST 0 0 5.00K Thunderstorm Wind (52EG)Numerous trees were down near the intersection of Robert E Lee Drive and Gibson Lane.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Spotsylvania County1 ESE Alsop 12 1530EST 0 0 Hail (1.00)Quarter sized hail was reported on Millwood Lane near Alsop.Spotsylvania County1 SSW Spotsylvania 12 1532EST 0 0 3.00K Thunderstorm Wind (52EG)Trees were blocking the roadway along Courthouse Road.474

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthA backdoor cold front stalled out over the region on the 12th while and upper-level disturbance passed through the area. A hotand humid air mass ahead of the cold front produced moderate amounts of instability. Some thunderstorms that developed wereable to produce damaging wind and large hail. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Fairfax County1 NNW Swinks Mill 18 0535EST0635EST 0 0 0.00K 0.00K Flash FloodGeorgetown Pike at Swanks Mill Road was closed due to flash flooding. A rainfall report from the area was received of 3.68inches.Fairfax County1 WNW Clarks Crossing 18 0558EST0658EST 0 0 0.00K 0.00K Flash FloodLawyers Road near Hunter Mill Road was closed due to high water. A rain gauge near the area measured 2.86 inches of rain.Fairfax County1 W Kenmore 18 0600EST0700EST 0 0 25.00K 0.00K Flash FloodA bridge on Beulah Road was washed out at Wolftrap Run. Rainfall in the area was measured at 2.91 inches.Fairfax County1 E Elkins 18 0615EST0715EST 0 0 0.00K 0.00K FloodThe intersection of Old Dominion Drive at Georgetown Pike was flooding. A rain gauge in the area measured 4.58 inches.Fairfax County1 SW Spring Hill1 N Mc Lean Hamlet18 0715EST0815EST 0 0 0.00K 0.00K FloodFlooding was reported on Lewinsville Road between Route 7 and Springhill Road. A rain gauge near the area was reported tohave measured 4.37 inches.Fairfax County11 NW Herndon Hgts 18 0745EST0845EST 0 0 0.00K 0.00K Flash FloodEdwards Ferry Road was closed due to flash flooding on Cattail Creek. A rain gauge in the area observed 2.77 inches.Low pressure moved west to east along a stationary boundary draped across far northern Virginia and Maryland.Thunderstorms associated with this low pressure produced very high rainfall rates with the aide of a moisture laden atmosphere.Flash flooding and other nuisance flooding was reported across northern Fairfax County during the morning from rainfallamounts of 2 to 4 inches in less than 3 hours.Nelson County2 NE Elma 26 1538EST 0 0 0.50K Thunderstorm Wind (50EG)Tree limbs two to three inches in diameter were blown down near Elma.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Nelson County2 SW Rockfish 26 1541EST 0 0 0.50K Thunderstorm Wind (52EG)Tree limbs three to four inches in diameter were blown down near Rockfish.A cold front passed through central Virginia on the 26th. There was just enough instability for a couple thunderstorms to mixdown gusty winds from aloft. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.475

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, NorthwestBuchanan CountyVansant 04 1820EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were broken.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buchanan CountyGrundy 04 1825EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees fell onto power lines, resulting in electric outages.A thunderstorm complex formed in Ohio and intensified in southern West Virginia. This complex reached Virginia during theevening hours. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Dickenson County1 NW Honeycamp 05 1543EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)VIRGINIA, SouthwestTrees were blown down along Route 72.Thunderstorms moved across Kentucky during the morning hours and into southern West Virginia during the early afternoon.By mid and late afternoon, tall thunderstorms were affecting portions of far western Virginia. Note: The estimated wind gust of50 knots is equivalent to 58 mph.Pulaski County6 SE Dublin 04 1737EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees were knocked down in Claytor Lake State Park.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bath County10 NNE Mountain Grove 04 1750EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Several trees were down along a slope near Bath Pumped Storage Upper Reservoir.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County4 ESE Bedford City 04 1845EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown over.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockbridge County1 N Natural Bridge Stati 04 1850EST 0 0 0.00K 0.00K Funnel CloudTwo funnel clouds were sighted just east of Indigo Lane near the Blue Ridge mountains.Giles CountyRich Creek 04 1855EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A 20-foot pear tree in Rich Creek was blown down by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Amherst County2 NW Dillard 04 1905EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down onto a house at the intersection of Elon Road and Horeshoe Bend Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County3 NNE Boonsboro 04 1906EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Three trees were knocked down by thunderstorm winds onto Holcomb Rock Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.476

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestAmherst CountyMadison Hgts 04 1914EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Numerous trees were blown down by thunderstorm winds on Route 130 and Route 29.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Roanoke County1 WNW Mason Cove 04 1915EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A large tree was blown down and blocked Route 311 at the Appalachian Trail access.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockbridge County1 N Natural Bridge Stati 04 1920EST 0 0 0.00K 0.00K Funnel CloudTwo funnel clouds were sighted just east of Indigo lane near the Blue Ridge mountains.Campbell County3 NW Concord 04 1928EST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down onto some power lines.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Franklin County3 WNW Waidsboro 04 1928EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Several large tree limbs were brought down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County1 NNW Waidsboro 04 1928EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree was knocked over by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County2 NNW Wirtz 04 1941EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree was blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County2 NNW Hardy 04 1942EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several large trees and tree limbs were brought down along Hardy Road and Beagles Club Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford County2 SSE Stewartsville 04 1942EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was brought down on Goodview Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Campbell County2 E Gladys 04 1942EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Mollies Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County3 NE Stone Mt 04 1946EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree was blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.477

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestBuckingham County1 W Buckingham Arpt 04 1950EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A tree was blown onto power lines on Pattie Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buckingham County1 SW Buckingham Arpt 04 1951EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down onto Pattie Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buckingham CountyMt Vinco 04 1951EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Two trees were knocked down on Route 601 due to high winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County9 ENE Burnt Chimney 04 1951EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)On tree was reported blown down in the area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wythe County3 NNE Haven 04 1952EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was reported blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wythe County3 NNE Haven 04 1952EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree was blow down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Appomattox County1 SSE Evergreen 04 1954EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Two trees were reported down on Old Evergreen Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County2 SSW Callaway 04 1956EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree was blown over.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County1 S Barfoot 04 1957EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree was reported down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buckingham County2 WSW Toga 04 2000EST 0 0 5.00K 0.00K LightningLightning caused damage to a tree which then fell on a house along Union Church Road.Buckingham County3 SW Mt Vinco 04 2005EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down across South James River Highway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.478

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestWythe County1 NE Coleman Store 04 2006EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wythe County1 NE Catron 04 2011EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was reported down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wythe County1 SSW Jacksons Ferry 04 2012EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)One tree fell down in the high winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buckingham County4 SW Sheppards 04 2015EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Deer Run Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buckingham County1 NE Curdsville 04 2019EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Evans Mill Road and this caused two accidents, one of which resulted in an injury.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charlotte County4 W Charlotte Court Hous 04 2045EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported blown down on Fearstown Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charlotte County1 N Charlotte Court Hous 04 2050EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A tree was blown onto Highway 47.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charlotte County5 SSW Charlotte Court Hous 04 2100EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Mossing Ford Rd.A complex of thunderstorms, some severe, crossed the region during the evening hours producing pockets of winds damageover a wide area. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockbridge County4 WNW Brownsburg 05 1250EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported down along State Road 724.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockbridge County2 WNW Brownsburg 05 1255EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was brought down along Dutch Hollow Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rockbridge County1 NE Aqua 05 1347EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees reported down on Decatur Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.479

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestGrayson County1 S Independence 05 1400EST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)Winds were measured to 56 knots along with nickel-size hail.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Smyth County1 W Saltville 05 1403EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Several trees blown down on Allison Gap Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Henry CountySpencer 05 1409EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blow down onto Spencer Penn Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Smyth County1 W Mt Carmel 05 1418EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)A number of trees were down on Hutton Branch Rd.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Rockbridge County1 N Natural Bridge Stati 05 1420EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Trees were down on Arnolds Valley Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Rockbridge County1 SE East Lexington 05 1427EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds caused trees to fall across River Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Carroll County2 NW Cana 05 1428EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Trees were blown over on Flower Gap Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Patrick CountyStuart 05 1428EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree fell on a car trailer causing some damage.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Radford (c) County1 NE Radford 05 1428EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Three Bradford Pear trees were badly damaged.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Botetourt County1 E Troutville 05 1435EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Large tree limbs were down along the road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pittsylvania CountySandy River 05 1440EST 0 0 1.00K 0.00K Thunderstorm Wind (60EG)Trees and numerous large tree limbs were down and a small camper overturned with slight property damage.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.480

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestGrayson County1 NE Elk Creek 05 1442EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were brought down by high winds on Highway 21.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Carroll County3 SSW Laurel Fork 05 1445EST 0 0 1.00K 0.00K Thunderstorm Wind (55EG)Trees were reported down on Keno Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Patrick County1 NE Stuart 05 1449EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were reported down on Dobbins Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford County2 SSW Big Island 05 1450EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported down on Waugh Switch Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Patrick County2 SE Stuart 05 1450EST 0 0 1.50K 0.00K Thunderstorm Wind (55EG)Several trees were down on Moorefield Store Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford CountyWaugh 05 1452EST 0 0 2.00K 0.00K Thunderstorm Wind (60EG)High winds brought down numerous trees on High Ridge Road.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Bedford CountyWaugh 05 1455EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down by thunderstorm winds across Lee-Jackson Highway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Floyd County3 ENE Sowers 05 1455EST 0 0 0.50K 0.00K Thunderstorm Wind (55EG)A large oak tree was snapped by high winds on Dobbins Hollow Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Tazewell CountyJewell Ridge 05 1455EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)A tree was down on a power line in the Jewell Ridge area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Amherst CountyElon 05 1500EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Numerous trees were blown down.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford County3 N Thaxton 05 1500EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was down on Mcdearmon Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.481

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestHenry County1 NW Martinsville Airport 05 1505EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A three-foot diameter Poplar tree was down on Airport Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bland County1 N Bastian 05 1507EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down on North Scenic Highway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County1 N Thaxton 05 1514EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was reported blown down on Penicks Mill Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County1 WNW Irving 05 1514EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds brought down a tree on Wilkerson Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County3 SW Peaksville 05 1515EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds brought down a tree on Kelso Mill Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County3 S Peaksville 05 1518EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Turkey Mountain Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bath CountyHot Spgs 05 1520EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Large tree limbs were blown down by thunderstorm winds in town.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Floyd County4 SE Union 05 1523EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A few large tree limbs were down on the Blue Ridge Parkway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County3 NE Bedford City 05 1525EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was reported blown down on Big Island Highway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County1 E Thaxton 05 1530EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees reported down on Magnolia Drive.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bland County1 WSW Ceres 05 1534EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Two trees and numerous branches down from high winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.482

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestFranklin County1 NE Glade Hill 05 1541EST 0 0 3.00K 0.00K Thunderstorm Wind (60EG)Numerous trees blown down in the area of Gladehill with several roads blocked.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Franklin County1 ESE Progress 05 1548EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Storms brought down a peach tree and numerous large limbs on Danville Parkway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County2 WNW Goodview 05 1551EST 0 0 1.00K 0.00K Thunderstorm Wind (55EG)Trees were brought down on Morgans Mill Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford County1 SSE Irving 05 1552EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree fell on Union Church Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Appomattox County1 N Appomattox 05 1553EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were brought down along Route 24 and Route 460.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford County2 SE Thaxton 05 1600EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A single tree was down across Von Doy Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County1 E Thaxton 05 1600EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A solitary tree was blown down by thunderstorm winds across West Lynchburg-Salem Turnpike.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County5 SSW Bedford City 05 1602EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Trees were blown down on Mob Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County1 E Bedford City 05 1602EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds knocked down trees on South Street.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County2 ENE Bedford City 05 1603EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down by thunderstorm winds.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford County2 ESE Bedford City 05 1603EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds blew down trees on Link Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.483

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestBedford County5 SSE Bedford City 05 1604EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Trees were brought down by thunderstorm winds on Old Country road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County4 NNE Stone Mt 05 1604EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds brought down trees Nolans Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County2 N Stone Mt 05 1605EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown over by thunderstorm winds on Moneta Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County5 NNW Gillespie 05 1608EST 0 0 1.50K 0.00K Thunderstorm Wind (55EG)Thunderstorm winds blew trees down at Teass Terrace.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford County3 N Gillespie 05 1609EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Fallen trees from thunderstorm winds occurred along Falling Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Amherst County1 WNW Pleasantview 05 1610EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Two trees were blown down on Lovelady Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Amherst CountyPleasantview 05 1613EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was knocked down by thunderstorm winds on a road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Halifax County1 SE Brooklyn 05 1615EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed a tree on Goodes Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County1 E Forest New London Ar 05 1616EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees blown down due to high winds on Bethel Church Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Bedford County1 NNE Forest New London Ar 05 1618EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree fell down from thunderstorm winds on Evington Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.484

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestAmherst County3 WNW Galts Mill 05 1623EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were brought down by thunderstorm winds onto Izaak Walton Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Patrick County4 NE Critz 05 1623EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Multiple trees were blown down and some fell across Stellah Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Patrick County3 NNE Critz 05 1623EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Multiple trees were blown down from thunderstorm winds on Salem Church Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Tazewell County1 WSW Pounding Mill 05 1637EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A four-inch diameter tree branch was blown down in Claypool Hill.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Tazewell County2 NNW Cedar Bluff 05 1639EST1739EST 0 0 0.00K 0.00K Flash FloodA few boulders from a rockslide closed Route 460 on the east side of Richlands.Halifax County1 E South Boston 05 1641EST 0 0 1.50K 0.00K Thunderstorm Wind (55EG)Trees were blown down on Eastover Drive.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Halifax County3 SSE Riverdale 05 1642EST 0 0 1.50K 0.00K Thunderstorm Wind (55EG)Several trees were blown down at the intersection of Cherry Hill Church Road and East Hyco Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Smyth County1 W Saltville 05 1642EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Two trees were blown over in Allison Gap with one across power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Tazewell County1 NE Mouth Of Laurel 05 1642EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were brought down by thunderstorm winds on Ravens Nest Branch.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Tazewell County1 ENE Cliffield 05 1642EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds brought down trees on Baptist Valley Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.485

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestCharlotte County1 N Harrisburg 05 1650EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was brought down by thunderstorm winds on Fearstown Rd.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Halifax CountyClover 05 1652EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was brought down by thunderstorm winds on Gayle Street.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charlotte County2 ENE Charlotte Court Hous 05 1654EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds brought down one tree on George Washington Highway.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charlotte County1 N Charlotte Court Hous 05 1655EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds knocked down one tree on Route 40.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Charlotte County2 SSW Abilene 05 1655EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was brought down by winds onto Abilene Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Bedford County2 NNW Bedford City 05 1705EST1805EST 0 0 0.00K 0.00K Flash FloodNichols Road bridge was closed due to high water.Franklin County2 E Dillons Mill 05 1745EST1845EST 0 0 0.00K 0.00K Flash FloodBethlehem Road closed by flooding.Franklin County1 S Callaway 05 1745EST1845EST 0 0 0.00K 0.00K Flash FloodCallaway Road was impassible due to flood waters.Bedford CountyThaxton 05 1747EST1847EST 0 0 0.00K 0.00K Flash FloodFlooding from an unnamed creek caused Union Church Road to be closed.Bedford County1 NNE Forest New London Ar 05 1750EST1850EST 0 0 0.00K 0.00K Flash FloodEvington Road was closed due to flood waters flowing over the road.486

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestBedford County5 NNE Stone Mt 05 1750EST1850EST 0 0 0.00K 0.00K Flash FloodHeavy rains caused Nolans Drive to become impassable due to high water.Bedford County3 S Bedford City 05 1750EST1850EST 0 0 0.00K 0.00K Flash FloodNininger Creek flooded over Five Forks Road, which was closed.A cold front crossed into the area at peak heating of the day creating high instability along with moderate wind shear. Scatteredthunderstorms developed ahead of the front as well as more organized lines closer to the front, producing downburst winds butvery little hail. Some training of cells occurred resulting in some flash flooding as well. Every Virginia county in the warningarea had a warning issued at one point or another.Bedford County2 W Lowry 11 1339EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds brought down a large tree limb across Timber Ridge Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Campbell County1 SE Lynchburg Arpt 11 1425EST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down on a power line on Winebarger Circle.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Campbell County3 ENE Rustburg 11 1440EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down on Harbor Drive and caused an accident.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County2 WNW Barfoot 11 1513EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported blown down by thunderstorm winds on Coles Creek Road near Calico Rock Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Henry County2 SW Preston 11 1530EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown down by thunderstorm winds on Spencer-Preston Road about two miles north of Highway 58.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Pittsylvania County1 E Dry Fork 11 1635EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was blown down by thunderstorm winds on Pleasant Gap Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Montgomery County2 ESE Radford City 11 1730EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)A power line was reported to be knocked down by thunderstorm winds on Rock Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.487

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestFranklin County3 NNW Ferrum 11 1753EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported knocked down by thunderstorm winds on Saw Mill road near the intersection with Fair Mountain Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Floyd County1 SE Willis Store 11 1831EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was reported blown down from thunderstorm winds blocking Griffith Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Montgomery County1 W New Ellett 11 1850EST1950EST 0 0 0.00K 0.00K Flash FloodHeavy rains caused Cedar Run to flood it banks.Montgomery County3 SE Snowville 11 1922EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A blown down tree was blocking Indian Valley Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Montgomery County2 W Rogers 11 1927EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down by thunderstorm winds near the intersection of Highway 8 and Smith Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Montgomery County1 S Rogers 11 1930EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown over along Nolley Road.Storms developed during the afternoon within a hot and humid air mass with high temperatures well into the 90s and dewpoints into 70s across much of the area. This unstable air mass contributed to the strong winds associated with these storms.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buckingham County1 W Alcoma 16 1442EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were reported to be blown down by thunderstorm winds in an area northwest of the town of Buckingham.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Montgomery County1 E Shawsville 16 1449EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds blew a tree on a power pole and knocked it over at Alleghany Springs Road and Kirk Hollow Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Appomattox County1 NW Stonewall 16 1645EST1745EST 0 0 0.00K 0.00K Flash FloodStonewall Creek was reported out of its banks. A retired NWS employee reported 3.78 inches of rain.Appomattox County3 N Stonewall 16 1716EST1816EST 0 0 0.00K 0.00K Flash FloodWater was reported to be flowing across a road from a nearby creek.488

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestAn area of showers and thunderstorms moved from west to east across southwest Virginia during the afternoon and fewstronger embedded cells were able to produce wind gusts up to severe levels. Another cell tracked from eastern Campbellacross Appomattox County and produced very heavy rain in a short time, with reports of up to 4 inches of rain and flashflooding.Grayson County1 N Reavistown 17 1530EST1630EST 0 0 2.00K 0.00K Flash FloodFlash flooding was reported on Route 58 near Delheart Road due to heavy rains and a backed up culvert.Grayson County2 S Carsonville 17 1530EST 0 0 0.00K 0.00K Flash FloodA rock slide closed part of Route 274 about two miles north of Route 58.Galax (c) CountyGalax 17 1600EST1700EST 0 0 0.00K 0.00K Flash FloodLocal law enforcement reported street closures due to high water. Givens Street and Shaw street were closed. Water was alsoreported flowing across Railroad Avenue. The water treatment plant reported 1.80 inches of rain.The period from August 17-19 became very active hydrologically as a frontal boundary stalled out across the region and aseries of upper-air impulses helped to trigger fairly widespread convection. Forecasters recognizing this potentially very wetpattern issued a Flash Flood Watch the afternoon of the 17th. By early evening the same day, thunderstorms were training overGalax, VA and vicinity with rainfall amounts up to 1.5 to 2.5 inches in several hours. Maximum 24-hour rain gage totalsending at 12Z on the 18th within the warned area included Blackburn Knob IFLOWS 3.82â, Grayson Highland IFLOWS 3.12and Galax Water Plant COOP 2.90â.Franklin County1 NE Wirtz 18 1325EST 0 0 5.00K 0.00K Thunderstorm Wind (55EG)Thunderstorm winds caused several trees to be uprooted and caused some damage to power lines on Bonbrook Mill Road.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Franklin County1 SE Wirtz 18 1332EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A large tree was blown down by thunderstorm winds along the 1300 block of Wirtz Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Franklin County1 ESE Wirtz 18 1332EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds knocked down a 100-year old tree on a home in the 1200 block of Wirtz Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Appomattox County4 WNW Hixburg 18 1515EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blow down across Morningstar Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Henry County1 E Ridgeway 18 1533EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A tree was blown down along Morehead Avenue.A frontal boundary remained stalled out across southern Virginia with very high moisture in place. Thunderstorms developed inthe early afternoon over the foothills and pushed out into the Piedmont. Along with very heavy rains there were some gustywinds that caused scattered tree damage. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.489

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestSmyth County2 SE North Holston3 SSE Broadford19 1330EST1430EST 0 0 0.00K 0.00K Flash FloodFlooding along Beaver Creek closed Beaver Creek Road at Valley Road and several other roads in the Saltville area wereclosed due to high water.Carroll County1 NNW Gladeville 19 1500EST1600EST 0 0 0.00K 0.00K Flash FloodMill Creek was reported to be out of its banks and flooding the intersection of Mill Creek Road and Creek View Road.Galax (c) CountyGalax 19 1500EST1600EST 0 0 0.00K 0.00K Flash FloodA number of streets were closed in the City of Galax due to flooding.The period from August 17-19 became very active hydrologically as a frontal boundary stalled out across the region and aseries of upper-air impulses helped to trigger fairly widespread convection. Forecasters recognizing this potentially very wetpattern issued a Flash Flood Watch the afternoon of the 17th. By early evening the same day, thunderstorms were training overGalax, VA and vicinity with rainfall amounts up to 1.5 to 2.5 inches in several hours. Maximum 24-hour rain gage totalsending at 12Z on the 18th within the warned area included Blackburn Knob IFLOWS 3.82â, Grayson Highland IFLOWS 3.12and Galax Water Plant COOP 2.90â.Pittsylvania County2 SSE Chestnut Level 24 0010EST0110EST 0 0 0.00K 0.00K Flash FloodState Route 717 was closed and impassable due to high water.A few thunderstorms developed during the overnight of the 23rd and dropped heavy rainfall over the far eastern sections of thearea. Rainfall was 2 to 3 inches over Charlotte and Halifax counties, with 1 to 2 inches over parts of Campbell and Halifax andPittsylvania counties. A few of the higher rain gage amounts ending at 7 am on the 24th included Keysville COOP at 2.10â,South Boston COOP 2.01â, and Danville (DAN) 1.60â.Lynchburg (c) County2 ESE Lyh Ivy Hill Arpt 24 1239EST1439EST 0 0 0.00K 0.00K Flash FloodCity police reported that Sandusky Drive was closed between Rhonda Road and Greenwood Drive due to rapidly flowing waterwell over 6 inches in depth. A later report said the water from Burton Creek reached 2 feet of depth in the parking lot ofSandusky Park.An unusual pattern developed early in the 24th with low-topped showers and few embedded thunderstorms that tracked fromeast to west in the morning and midday hours. Rainfall rates were not especially intense but were prolonged over parts ofCampbell County and the City of Lynchburg. The 24-hour rainfall for August 24th of 2.55â (midnight to midnight) at LYH seta record for the date, breaking the old record of 2.21â set in 1967. Other 24-hour amounts ending at 7 AM EDT on the 25thincluded Lynchburg COOP 3.64â, Sugarloaf Mountain IFLOWS 3.53â, Sloan Branch IFLOWS 3.19â and Lynchburg (LYH)2.84â.Botetourt County1 WNW Lithia 26 1326EST 0 0 0.00K 0.00K Hail (1.75)Golf ball size hail reported at Mile Marker 160 on Interstate 81.Radford (c) County1 NW Radford 26 1406EST 0 0 0.00K 0.00K Hail (0.88)Dime to nickel size hail fell.Patrick County1 E Dodson 26 1539EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was knocked down by thunderstorm winds.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.490

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGINIA, SouthwestAmherst County1 S Elon 26 1547EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A one-foot diameter tree limb was blow down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Amherst County2 S Elon 26 1550EST1650EST 0 0 0.00K 0.00K Hail (0.88)Penny to nickel size hail reported.Franklin County1 S Glade Hill 26 1550EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Several large tree limbs were reported to be down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buckingham County1 NW Wingina 26 1625EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree was reportedly blown down by strong winds along State Route 604.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Patrick County1 ENE Stuart 26 1752EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)One tree blown over by the strong winds.A combination of daytime heating, instability and low-level moisture ahead of a cold front resulted in scattered showers andthunderstorms. Some of the stronger cells produced golf-ball size hail and winds up to 60 mph causing tree damage. Note: Theestimated wind gust of 50 knots is equivalent to 58 mph.VAZ012Wythe29 0700EST1100EST 0 0 0.00K 0.00K Dense FogDense fog, with visibilities down to 1/4 mile or less may have been a contributing factor in a 2-vehicle accident on Interstate 77in Wythe County. The crash occurred about 5:20 a.m. when a woman drove the wrong way on the interstate and collided with atractor-trailer. The woman died at the scene, while the truck driver suffered minor injuries.WASHINGTON, NortheastWAZ042East Slopes Northern Cascades01050000PST1700PST 0 0 0.00K 0.00K WildfireThe Rainbow Bridge Fire, centered 1.5 miles north of Stehekin, was a fire of unknown cause which burned about 3,710 acres.The fire burned within a few hundred feet of the Stehekin School and the historic schoolhouse. A couple of homes were undermandatory evacuations. The fire started on July 29th.WAZ044Waterville Plateau03 1700PST 0 0 0.00K 0.00K Wildfire07The Leahy Junction Fire, centered 14 miles southeast of Bridgeport, was a lightning caused fire that burned 1,000 acres. Thefire caused the closure of state Highway 174 a couple times on August 4th and 5th.Chelan County1 NNE Wagnersburg 04 0400PST0450PST 0 0 0.00K 0.00K Flash FloodVery heavy rain from a thunderstorm resulting in a large mudslide onto Highway 97-A south of Entiat. This resulted in theroad being closed for several hours between mileposts 206 and 210. The road itself was not damaged, but a nearby railroadtrack was damaged. A rain gauge in the area measured 0.90 inches of rain in one hour. The heavy rain occurred over theSwakane Fire burn area, which burned in July 2010.491

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WASHINGTON, NortheastAsotin County6 SSE Asotin 06 1327PST1332PST 0 0 0.00K 0.00K Hail (1.50)Asotin County7 NE Anatone 06 1334PST1339PST 0 0 0.00K 0.00K Hail (1.50)A severe thunderstorm resulted in large hail seven miles southeast of Asotin. Hail up to 1.5 inches in diameter was reportedfrom this storm.WAZ042East Slopes Northern Cascades26 1030PST1130PST 0 0 1.0K 0.00K Strong WindA strong wind gust measured at 40 MPH resulted in downed power lines with power out to the whole community of Stehekin.WAZ044Waterville Plateau26 1300PST1600PST 0 0 0.00K 0.00K Dust StormStrong winds behind a cold front resulted in significant blowing dust over portions of the Waterville Plateau. The Departmentof Highways reported zero visibility on State Route 172 between mileposts 18 and 22 near Mansfield, resulting in a roadclosure.WAZ033-035>038Northeast Mountains - Okanogan Highlands - Spokane Area - Upper Columbia Basin - WashingtonPalouse26 1300PST1700PST 0 0 1.0K 0.00K WildfireA combination of gusty winds and low relative humidity contributed to a couple new large fire starts. The Slide Creek Fire,centered six miles south of Colville, burned 989 acres, two homes, and one outbuilding. The Fish Hatchery Fire, centered threemiles north of Republic, burned 667 acres. Meanwhile, several other fires briefly brought an impact to the general public. Fourmiles south of Pullman, the Hatley Road Fire burned 50 acres and closed Highway 195 from milepost 15 to milepost 19. Thisfire came close to several homes. Another fire in Davenport led to the Lincoln County Fair briefly being evacuated. This firealso closed Highway 2. Another fire occurred six miles southwest of Davenport, burning 600 acres. The fire knocked outpower to Davenport, destroyed one barn, closed Highway 28, and sporadically closed Highway 2.WAZ038Okanogan Highlands27291500PST1700PST 0 0 0.00K 0.00K WildfireThe Buffalo Lake Fire, centered five miles northeast of Coulee Dam, was a human caused fire that burned 408 acres.WEST VIRGINIA, EastGrant County3 WNW Mt Pisgah 04 1655EST 0 0 7.00K Thunderstorm Wind (61EG)Trees were down across the county.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Mineral CountyElk Garden 04 1655EST 0 0 3.00K Thunderstorm Wind (56EG)Trees and power lines were down down near Elk Garden.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Mineral County3 NW New Creek 04 1700EST 0 0 Thunderstorm Wind (51MG)A wind gust of 59 mph was measured near New Creek.Note: The measured wind gust of 51 knots is equivalent to 59 mph.492

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, EastMineral County1 ENE Limestone 04 1700EST 0 0 7.00K Thunderstorm Wind (56EG)Trees were down along roads across the county.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Hardy County3 E Flats 04 1716EST 0 0 7.00K Thunderstorm Wind (52EG)Trees were down across the county.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Pendleton CountyMouth Of Seneca 04 1718EST 0 0 1.00K Thunderstorm Wind (52EG)A tree was down on US 33 in Seneca Rocks.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Hampshire County1 NNW North River Mills 04 1725EST 0 0 3.00K Thunderstorm Wind (65EG)Multiple trees were down along roads across the county.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Hampshire County1 ENE Yellow Spg 04 1730EST 0 0 50.00K Thunderstorm Wind (70EG)Two mobile homes were destroyed. One had the roof blown off and the other had a tree that fell into it.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Hampshire County1 SW Capon Bridge 04 1731EST 0 0 3.00K Thunderstorm Wind (61EG)WEST VIRGINIA, NorthTrees were down on Dillions Run Road.High pressure over the Atlantic Ocean continued to pump in hot and humid air over the Mid-Atlantic. A series of upper-leveldisturbances in the jet stream passed through eastern West Virginia triggering showers and thunderstorms during this time.There was enough instability from the hot and humid air for some thunderstorms to contain damaging winds during theafternoon and evening hours. Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Brooke CountyFollansbee 04 1515EST 0 0 75.00K 0.00K Thunderstorm Wind (55EG)Emergency management reported numerous trees and power lines down in Follansbee.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Brooke CountyWellsburg 04 1515EST 0 0 75.00K 0.00K Thunderstorm Wind (55EG)Emergency management reported numerous trees and power lines down in Wellsburg.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Marshall County1 W Mt Olive 04 1515EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)A trained spotter reported numerous trees and powerlines down in Mozart, WV.Ohio CountyWheeling2 SSW BethlehemNote: The estimated wind gust of 50 knots is equivalent to 58 mph.04 1515EST1520EST 0 0 125.00K 0.00K Thunderstorm Wind (60EG)A trained spotter reported widespread trees down blocking roads throughout Wheeling, with roof damage and a tree down on ahouse near Mozart.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.493

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, NorthMarion County1 N Gaston Jct 04 1542EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)WEST VIRGINIA, SoutheastThe public reported trees down in Fairmont.A mesoscale convective system moved along a boundary situated over east central Ohio, southern Pennsylvania and NorthernWest Virginia. Severe thunderstorms across eastern Ohio, southwest Pennsylvania, northern West Virginia, and Garrett countyMaryland produced widespread wind damage with 50 thousand homes left without power. The counties that were hardest hitwere Belmont and Jefferson counties in Ohio, where numerous large trees blocked roadways and three large radio stationtowers collapsed. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greenbrier CountyRupert 04 1734EST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)Several large tree limbs were reported down on the west side of Rupert.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greenbrier CountyRenick 04 1742EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)A large tree was brought down by thunderstorm winds and blocked traffic on Auto Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Summers CountySandstone 04 1807EST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)Several trees were reported down in the Sandstone area.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Summers CountyTalcott 04 1832EST 0 0 3.00K 0.00K Thunderstorm Wind (55EG)Several trees were reported down in Talcott.A complex of thunderstorms, some severe, dropped southeast from the Ohio Valley late on the afternoon of the 4th producingseveral reports of wind damage across parts of southeast West Virginia. Note: The estimated wind gust of 55 knots isequivalent to 63 mph.Mercer County1 SSE Giatto 05 1325EST 0 0 0.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds downed one tree on Cemetery Hill Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Greenbrier County1 N Charmco 05 1415EST 0 0 1.00K 0.00K Thunderstorm Wind (55EG)Thunderstorm winds brought down several trees along Route 20.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Greenbrier County1 S Farmdale 05 1418EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were blown down on Route 26.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Greenbrier County1 SW Kieffer 05 1430EST 0 0 1.50K 0.00K Thunderstorm Wind (50EG)Thunderstorm winds brought down trees on Otter Creek Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.494

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, SoutheastGreenbrier CountyLewisburg 05 1432EST 0 0 0.00K 0.00K Thunderstorm Wind (60EG)Numerous trees were downed by thunderstorm winds in the area.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Greenbrier CountyFrankford 05 1438EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Several trees were downed by thunderstorm winds in the Frankford area.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Greenbrier County1 NW Teaberry 05 1440EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Numerous trees were brought down by high winds.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Greenbrier CountyRonceverte 05 1442EST 0 0 2.00K 0.00K Thunderstorm Wind (55EG)Numerous trees were blown down by thunderstorm winds.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Greenbrier County1 N White Sulphur Spgs 05 1446EST 0 0 1.50K 0.00K Thunderstorm Wind (55EG)WEST VIRGINIA, WestTrees were blown down by thunderstorm winds north of White Sulphur Springs.A cold front crossed into the area at peak heating of the day creating high instability along with moderate shear. Scatteredthunderstorms developed ahead of the front as well as more organized lines closer to the front, producing downburst winds butvery little hail. Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Tyler CountySistersville 04 1515EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jackson CountyRipley 04 1535EST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)Roane CountySpencer1 ESE BarrsSeveral trees were blown down. Electric power outages occurred.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.04 1546EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down in town and along Parkersburg Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Calhoun County1 SE Minnora 04 1550EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Route 16 was blocked by fallen trees.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Roane County1 SSE Gandeeville 04 1550EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)A tree and other large branches fell across Route 119.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.495

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, WestKanawha CountyCharleston3 S South Charleston04 1615EST1635EST 1 1 200.00K 0.00K Thunderstorm Wind (50EG)Several trees and large branches were blown down from the East End of Charleston on toward Kanawha State Forest. Somebranches fell onto vehicles. The dark screen at the baseball field was shredded by the wind.A delayed direct death occurred in a freak accident about 2 hours after the storms had ended. A man, his 2 children, and hismom were traveling in a 4 door sedan near Kanawha State Forest just before 1900E. They had tried to attend a midweekchurch service, but the service was canceled due to a power outage. A large tree, weakened by the storm, fell off a hillside anddirectly onto their moving vehicle. The roof was smashed. The 62 year old mother was killed. She was the passenger in thefront seat. The driver was seriously injured. The 2 children were not seriously hurt. F62VENote: The estimated wind gust of 50 knots is equivalent to 58 mph.Taylor CountyCoffman 04 1615EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees fell across Cap Towles Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Harrison CountyClarksburg 04 1618EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Trees fell around the county club and along Pike Street.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Taylor CountyWendel 04 1618EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Nicholas CountyDrennen 04 1654EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees fell across Route 129.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Upshur CountyFrench Creek 04 1655EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees fell onto power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Upshur CountyAlexander 04 1700EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees fell onto power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Putnam CountyEleanor 04 1705EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees and large branches damaged power lines and a transformer.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Putnam County1 W Scott Depot 04 1707EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees fell and pulled down power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Putnam County2 S Poca 04 1710EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees and large branches fell onto power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.496

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, WestRandolph CountyElkins Arpt 04 1710EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down. One tree fell onto a house.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Kanawha CountyCross Lanes 04 1717EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Lincoln CountyWoodville 04 1724EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees fell onto power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Boone CountyMadison 04 1738EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees fell onto power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Raleigh CountyBolt 04 1810EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Raleigh CountyBeckley 04 1810EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Raleigh CountyDaniels 04 1812EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Several trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wyoming CountyCyclone 04 1820EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wyoming CountyOceana 04 1825EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mcdowell CountyNewhall 04 1900EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Trees were knocked down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mcdowell CountyWelch 04 1900EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees were knocked down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.497

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, WestMcdowell CountyKimball 04 1905EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Trees were knocked down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wyoming CountyMullens 04 1905EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Cabell CountyHuntington3 WSW GuyandottePutnam CountyHurricane1 WNW Mt VernonTrees were knocked down onto power lines.In a hot and humid air, thunderstorms moved through southeast Ohio and into West Virginia during the afternoon. Low levelconvergence was aided by a leftover boundary from early morning convection. The thunderstorms moved southeast around 25to 30 mph with wind gusts the main hazard. The tall thunderstorms also produced considerable cloud to ground lightning.Power outages were common. One fatality occurred in Kanawha County. Note: The estimated wind gust of 50 knots isequivalent to 58 mph.05 1145EST 0 0 10.00K 0.00K Thunderstorm Wind (50EG)Trees and large branches were blown down in several locations within the city.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1215EST1220EST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)Several trees and large branches were blown down or uprooted. One tree fell onto a house adjacent to the Sleepy Hollow GolfCourse.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Kanawha County1 NW Elk 05 1242EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down on Montrose Drive.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Kanawha County(CRW) yeager Arpt 05 1248EST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)A wind gust was measured at 63 mph.Note: The measured wind gust of 55 knots is equivalent to 63 mph.Boone County1 E Lory 05 1302EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down along Camp Creek.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Kanawha CountyDry Branch 05 1310EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)The roof to the toll booth along the turnpike was damaged.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Boone CountyBob White 05 1321EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Calhoun County2 WNW Henrietta 05 1340EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down along Hog Knob Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.498

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, WestNicholas County1 NW Almoris 05 1345EST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)Trees brought down power lines along old Route 19.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wyoming CountyPineville 05 1346EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees fell onto power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Webster County1 N Cowen 05 1349EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees fell along Erbacon Road off of Route 20.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Fayette County1 NNE Oak Hill Jct 05 1353EST 0 0 20.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down on Oak Forest Road. A house was damaged.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Nicholas CountyMt Nebo 05 1400EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Webster County1 SSW Webster Spgs1 N BergooTrees were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.05 1410EST1411EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)Trees fell from south of Webster Springs to around Bergoo.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Randolph CountyBeverly 05 1420EST 0 0 4.00K 0.00K Thunderstorm Wind (50EG)Trees and large branches were knocked down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mcdowell CountyWelch 05 1455EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)Several trees and large branches were blown down. Some power lines were brought down by the falling limbs. Electricity wasinterrupted.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Mcdowell CountyAnawalt 05 1505EST 0 0 25.00K 0.00K Thunderstorm Wind (50EG)Trees and large branches were knocked down. One house sustained roof damage.A cluster of showers and thunderstorms moved rapidly east through Kentucky and into West Virginia by the early afternoon.The movement was toward the east at around 40 mph. This was a faster flow than observed during the convection on the 4th.Wind damage was the main hazard. Some segments bowed out, especially in Putnam County. Radar signatures for strongwinds were less obvious east and south of Charleston. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cabell County1 SW Huntington1 NW Malcom Spgs Hgts11 1604EST1745EST 0 0 200.00K 0.00K Flash Flood499

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, WestA few spotters in the city of Huntington measured 3 to 4 inches of rain for the localized maximum rain amounts. The rainduration was around 3 hours. Stream and street flooding closed several roads. Vehicles were flooded and abandoned on thestreets. Fourpole Creek flooded portions of Ritter Park. The usual viaduct flooding also occurred. The Cabell Countyemergency services director said the first responders were overwhelmed and the road closures brought the city to a halt.Raleigh County1 NNW Rhodell1 NNW Slab Fork11 1850EST2015EST 0 0 200.00K 0.00K Flash FloodStreams flooded roads and caused debris slides. Water flooded a few parked cars near Helen. An automatic rain gauge onTams Mountain measured 2.94 inches in less than 3 hours.Wyoming CountyGlen Rogers2 NNW Putt11 2000EST2100EST 0 0 5.00K 0.00K Flash FloodStreams flooded and closed roads around Glen Rogers. These streams were coming off of Guyandotte Mountain and feedingthe headwaters of Laurel Fork.With plenty of sunshine, a convective complex developed during the heat of the afternoon over central Ohio in a weak windflow. The storms intensified as they drifted southeast into southern Ohio and southern West Virginia. The rain did bring sometemporary relief from the heat. Minor flash flooding occurred. Rain rates of up to 2 inches in an hour were likely.Wayne County1 NNW Oakview Hgts 14 2027EST 0 0 3.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down in the Kenova vicinity.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Wayne CountyCeredo 14 2035EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Trees and large branches were knocked down. One trees fell onto a house and damaged its roof.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cabell County1 SW Guyandotte 14 2046EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Cabell County1 E Milton 14 2100EST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees were blown down and blocked the east bound lanes of Interstate 64.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Putnam CountyHurricane 14 2105EST2110EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Large branches were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Putnam County1 W Mt Vernon 14 2117EST 0 0 100.00K 0.00K Thunderstorm Wind (65EG)A microburst blew down 80 to 100 trees at the Sleepy Hollow Golf Course. Tree damage also extended into the adjacentWoods and Irons subdivision. Damage to dwellings was minor. Wind damage had occurred in this same area just over a weekearlier, on the 5th.Note: The estimated wind gust of 65 knots is equivalent to 75 mph.500

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WEST VIRGINIA, WestPutnam CountyMt Vernon 14 2120EST2123EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Broken large branches were scattered along Teays Valley Road.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Kanawha CountySt Albans 14 2125EST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Large branches and at least one tree were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Kanawha County1 N Rocky Fork 14 2130EST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)WISCONSIN, NortheastLarge branches and at least one tree were blown down on Rocky Fork Road.Thunderstorms developed during the afternoon over western Ohio and southeast Indiana. This was well south of a front, butalong a boundary leftover from previous convection. The storms intensified as they moved into northeast Kentucky andsouthwest West Virginia during the evening hours. Wind damage was the main hazard. However, brief localized downpoursof an inch in 30 minutes did cause the usual minor street flooding. The storms weakened during the late evening hours as theymoved further east in West Virginia. Note: The estimated wind gust of 50 knots is equivalent to 58 mph.WIZ005-010>012Florence - Forest - Oneida - Vilas01240000CST0600CST 0 0 DroughtMuch above normal rainfall across parts of northeast Wisconsin during the first few weeks of August helped bring an end to themoderate drought (D2) conditions that began in that area in April 2010.Marinette County2 W Walsh 07 1852CST 0 0 Thunderstorm Wind (52EG)Thunderstorm winds of 50 to 60 mph uprooted three large trees near Porterfield.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Marinette CountyPorterfield 07 1855CST 0 0 Thunderstorm Wind (56EG)Thunderstorm winds knocked trees onto a house.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Marinette County3 NE Harmony Corners 07 1905CST 0 0 Hail (1.00)Strong winds also blew a large blue spruce tree onto a tavern.Oneida County2 WNW Harshaw 07 2235CST 0 0 Thunderstorm Wind (56EG)More than a dozen trees were knocked down by thunderstorm winds near Harshaw. The weather observer also measured 2.47inches of rain during the storm.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Oneida County3 ESE Cresent Corner 07 2240CST 0 0 Thunderstorm Wind (56EG)Numerous trees were blown down by thunderstorm winds near the intersection of State Highway 17 and County Road A southof Rhinelander. Time of report is estimated.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.501

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, NortheastOutagamie County3 ENE Sugar Bush 08 0200CST 0 0 Thunderstorm Wind (52EG)Thunderstorm winds knocked several trees onto a shed and a garage in the Town of Maine.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Calumet CountyPotter 08 0244CST 0 0 Thunderstorm Wind (52EG)Several trees and tree limbs were blown down on County Road PP in Potter.Isolated thunderstorms developed along a warm front that moved through northeast Wisconsin during the evening of theAugust 7th, producing large hail and wind damage in Marinette County. A convective system moved into the area during theearly morning hours of the 8th, bringing damaging and torrential rains to other parts of northeast Wisconsin. Note: Theestimated wind gust of 52 knots is equivalent to 60 mph.Outagamie County2 S Kaukauna 11 0700CST1100CST 0 0 25.00K 0.00K Flash FloodHeavy rain fell across the Fox Valley, causing flash flooding near Kaukauna. Nearby Darboy measured 3.50 inches of rainduring the morning storms. Kankapot Creek in Kaukauna flooded Highway KK, which was closed for some time. WisconsinInternational Raceway, which was hosting a Pyrotechnics Guild International event, had to be evacuated due to the flood.Repeated thunderstorms caused heavy rain and flooding of Kankapot Creek near Kaukauna. Heavy rain also produced minorstreet and field flooding in Kimberly (Outagamie Co.) and Menasha (Winnebago Co.).Wood County1 WNW Kellner 13 0655CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds snapped and uprooted several trees near Grand Rapids.Thunderstorms developed along a warm front that lifted north across central Wisconsin. The storms produced isolated winddamage and heavy rainfall. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Vilas County1 S Lac Du Flambeau 13 1840CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Thunderstorm winds downed trees at Lac du Flambeau.A bowing line of storms moved from northwest Wisconsin into north central Wisconsin, in association with forcing from adisturbance in the upper atmosphere. The line of storms produced isolated wind damage in western Vilas County before theyweakened. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Oneida County1 SE Hazelhurst 20 0615CST 0 0 Hail (0.88)Nickel size hail fell at Hazelhurst.Oneida County1 SE Lake Tomahawk 20 0625CST 0 0 0.00K 0.00K Hail (0.75)Penny size hail fell accompanied by torrential rain at Lake Tomahawk.Vilas County9 WNW Land O Lakes 20 0959CST 0 0 0.00K 0.00K Hail (1.00)Quarter size hail fell at Bent's Camp Resort on Mamie Lake.Waupaca CountyNew London 20 1413CST 0 0 100.00K Thunderstorm Wind (78EG)Thunderstorm winds downed more than 1,000 trees throughout New London. A 28 foot trailer was blown onto its side and asection of the roof of the Sara Lee plant was damaged. At least 2 homes sustained damage from fallen trees.Note: The estimated wind gust of 78 knots is equivalent to 90 mph.502

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, NortheastBrown CountyAllouez 20 1425CST 0 0 Hail (1.50)Hail from penny size to ping pong ball size fell in the city of De Pere.Brown CountyBellevue 20 1432CST 0 0 Hail (1.00)Hail up to quarter size fell in Bellevue.Brown County1 SE Green Bay 20 1437CST 0 0 Hail (1.00)Quarter size hail fell on the east side of Green Bay.Brown County2 WSW Green Bay 20 1438CST 0 0 Hail (1.00)Quarter size hail fell, and was bouncing on the ground, at Lambeau Field in Green Bay.Winnebago County1 E Neenah 20 1450CST 0 0 Thunderstorm Wind (56EG)Thunderstorm winds gusting to 65 mph downed trees in Neenah.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Calumet CountyDarboy 20 1500CST 0 0 Hail (0.88)Nickel size hail fell at Darboy in Calumet County.Outagamie County1 SE Kaukauna 20 1507CST 0 0 Hail (0.88)Hail described as grape size fell in Kaukauna.Brown County2 SW Green Bay 20 1515CST1615CST 0 0 8.00K 0.00K Flash FloodThunderstorms produced torrential rains in Green Bay. Lombardi Avenue was closed between Oneida Street and HolmgrenWay due to 3 feet of water and stalled cars on the road. Storm and isolated sanitary sewer backups occurred in this area,causing some damage to basements. In just 10 minutes 0.88 inch of rain fell at Austin Straubel Airport, 0.54 inch of that fell injust 4 minutes.Brown CountyBellevue 20 1518CST 0 0 Thunderstorm Wind (54MG)A thunderstorm wind gust of 62 mph was measured at Bellevue.Note: The measured wind gust of 54 knots is equivalent to 62 mph.Brown County1 SE Greenleaf 20 1520CST 0 0 0.00K 0.00K Thunderstorm Wind (74EG)Numerous trees were uprooted and snapped in the city of Greenleaf by downburst winds from a severe thunderstorm. A farmoutbuilding was destroyed and 10 calf hutches were thrown 50 to 150 yards, killing the calves inside.Note: The estimated wind gust of 74 knots is equivalent to 85 mph.Brown County2 SE Greenleaf 20 1520CST1522CST 1.28 75 0 0 100.00K 0.00K Tornado (EF1)503

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, NortheastThe tornado touched down 2 miles southeast of Greenleaf, where several trees were snapped and uprooted. The tornado thendestroyed a relatively new barn constructed of metal wall panels and roof (DI 1, DOD 5,6). Pieces of the wall and roof panelswere strewn over 100 yards from the site. About 50 to 100 yards on either side of the damaged barn small outbuildings andtrees were untouched. The tornado continued east-northeast to another farm and heavily damaged a metal building whichcontained hay bales. Large parts of the metal roof were thrown over 200 yards. Numerous trees along the path were snappedor uprooted. Estimated maximum winds were 90 mph.The tornado dissipated just north of the Holland State Wildlife Area.Kewaunee County1 E Rosiere 20 1540CST 0 0 Thunderstorm Wind (56EG)Thunderstorm winds to 65 mph threw a large hay bale into a road, ripped about 20 percent of the shingles from a roof andknocked down a light pole.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Manitowoc County1 E Manitowoc 20 1700CST 0 0 Thunderstorm Wind (52EG)Thunderstorm wind gusts to 60 mph downed trees and tree limbs in the City of Manitowoc. Trees were also downed in otherparts of Manitowoc County.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Winnebago County1 ESE Oshkosh 20 1700CST 0 0 Thunderstorm Wind (56EG)Numerous large tree branches and several trees were blown down by winds from a severe thunderstorm.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.WIZ048-049Calumet - Winnebago20 1715CST1745CST 0 0 0.00K 0.00K SeicheCalumet County1 SSW Darboy 20 1715CST 0 0 Thunderstorm Wind (52EG)Large limbs broke off trees and landed on three vehicles at a local business causing damage to all three.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Outagamie CountyGreenville 20 1726CST 0 0 Thunderstorm Wind (52EG)Thunderstorm winds to 60 mph downed a few trees and tree limbs in Greenville.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Winnebago CountyNeenah 20 1740CST 0 4 0.00K 0.00K Thunderstorm Wind (52EG)A tree and several large limbs were blown over by thunderstorm winds at Riverside Park during a concert. Four people weretaken to a hospital with non-life threatening injuries.A line of thunderstorms developed north of a warm front that was slowly moving from south to north across Wisconsin. Theline of storms moved east across northern Wisconsin during the morning, producing penny to nickel size hail in Vilas Countyand Oneida County. More storms developed during the afternoon as a pair of upper level disturbances passed over the state.These storms produced large hail, wind damage, flooding rains and a tornado.Severe storms with heavy rains, hail, high winds, and a tornado, moved across the Fox Valley and Green Bay late in theafternoon. Highs winds blew down trees and damaged buildings at several locations. Hail over an inch in diameter fell inGreen Bay and De Pere. Intense rains caused flooding in Green Bay.In addition, thunderstorm winds produced a seiche on the northern shore of Lake Winnebago. Water rose into the yards ofseveral shoreline homes. Note: The estimated wind gust of 52 knots is equivalent to 60 mph.504

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, NorthwestDouglas County5 S Oliver 07 2050CST 0 0 0.00K 0.00K Hail (1.00)Sawyer CountyNew Post 07 2100CST 0 0 5.00K Thunderstorm Wind (52EG)Numerous trees were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Sawyer County10 NW Winter 07 2115CST 0 0 0.00K 0.00K Funnel CloudPrice CountyPhillips 07 2145CST2300CST 0 0 0.00K 0.00K Heavy RainWater was covering State Highway 13 in Phillips. 3.93 inches of rain was reported between 1045pm and midnight CDT.Burnett County1 SW Siren 07 2235CST 0 0 0.50K Thunderstorm Wind (50EG)A large tree was blown down onto a roadway.Thunderstorms, some severe, moved through northwest Wisconsin. Heavy rain also occurred with some of the thunderstorms.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Burnett CountySiren 12 2040CST 0 0 Thunderstorm Wind (50EG)Trees were blown down around the county.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Burnett CountyDanbury 12 2056CST 0 0 1.00K Thunderstorm Wind (50EG)Power lines were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Washburn CountyMinong 12 2123CST 0 0 1.00K Thunderstorm Wind (50EG)Trees were blown down.An isolated severe thunderstorm produced damaging wind gusts across portions of northwest Wisconsin. Note: The estimatedwind gust of 50 knots is equivalent to 58 mph.Ashland County4 S Ashland 13 1642CST 0 0 0.00K 0.00K Hail (0.88)Ashland CountyOdanah 13 1700CST 0 0 3.00K Thunderstorm Wind (50EG)Trees were blown down onto roads.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Sawyer County8 SSE Hayward 13 1700CST 0 0 Thunderstorm Wind (50EG)Trees were blown down in the Northwoods Beach area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Price County4 WNW Park Falls 13 1800CST 0 0 4.00K Thunderstorm Wind (50EG)Trees were blown down onto power lines near Butternut Lake.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.505

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, NorthwestPrice County3 N Park Falls 13 1830CST 0 0 3.00K Thunderstorm Wind (50EG)Several trees and a power line were blown down.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Iron County5 ESE Sandrock 13 1915CST 0 0 5.00K Thunderstorm Wind (50EG)Numerous trees and power lines were blown down in the Oma community.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Iron CountyMercer 13 1915CST 0 0 5.00K Thunderstorm Wind (50EG)Douglas County1 N Oliver4 WSW CloverlandNumerous trees and power lines were blown down.Severe thunderstorms blew through northwest and north-central Wisconsin...producing damaging winds and some hail. Note:The estimated wind gust of 50 knots is equivalent to 58 mph.18191300CST0340CST 0 0 0.00K 0.00K Flash FloodNumerous county roads were washed out or had standing water on them. County Roads Z, E, F, K, and V were all affected bythe heavy rain.Heavy rain, falling over a short period of time on already saturated soil, produced some flash flooding and standing water innorthern Douglas County.Sawyer County6 N Lake Chippewa 18 1300CST 0 0 0.00K 0.00K Hail (0.75)The hail fell at Spider Lake.Scattered thunderstorms occurred over northern Wisconsin.Price CountyKennan 20 0624CST 0 0 Hail (1.25)Iron CountyMercer 20 0900CST 0 0 0.00K 0.00K Hail (0.88)Iron CountyMercer 20 0905CST 0 0 0.00K 0.00K Hail (1.00)Iron CountyMercer 20 0905CST 0 0 2.00K Thunderstorm Wind (50EG)Trees were blown down with power outages reported around town.Price County1 W (PKF)Park Falls Muni1 ESE Park FallsNote: The estimated wind gust of 50 knots is equivalent to 58 mph.20 1845CST2000CST 0 0 0.00K 0.00K Flash FloodNearly a foot of water was flowing across State Highway 13 in Park Falls.Large hail and flash flooding accompanied isolated severe thunderstorms.506

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SoutheastWIZ051-056-059>060-062-069Fond Du Lac - Iowa - Ozaukee - Rock - Sauk - Sheboygan - Washington01 0000CST0700CST 0 0 Dense FogLight winds, clear skies and a humid air mass over the region led to the formation of dense fog over most of South Central andSoutheast Wisconsin. Many areas saw dense fog mainly between the hours of 2 am and 9 am CDT on August 1st, thoughSheboygan County saw visibilities drop to 1/4 mile or less around 11 pm CDT on July 31st.Iowa County3 NW Dodgeville 09 0045CST 0 0 Thunderstorm Wind (56EG)Sheriff deputies reported large trees were blown down by thunderstorm wind gusts estimated up to 56 knots (65 mph).Sauk CountyLoganvilleNorth FreedomNote: The estimated wind gust of 56 knots is equivalent to 64 mph.09 0100CST0110CST 0 0 Thunderstorm Wind (65EG)Sheriff deputies reported extensive trees damage from thunderstorm wind gusts estimated at 65 knots (75 mph).Iowa CountyMineral PtHollandaleColumbia County3 W LodiArlingtonNote: The estimated wind gust of 65 knots is equivalent to 75 mph.09 0103CST 0 0 Thunderstorm Wind (56EG)Sheriff deputies reported large trees down over many locations across eastern Iowa County from damaging thunderstorm windgusts.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.09 0125CST0133CST 0 0 Thunderstorm Wind (65EG)Dane County4 NNE VeronaFitchburgSheriff deputies reported sporadic damage to large trees from damaging thunderstorm wind gusts estimated at 65 knots (75mph).Note: The estimated wind gust of 65 knots is equivalent to 75 mph.09 0126CST 0 0 10.00K Thunderstorm Wind (65EG)Sheriff deputies reported large trees and power lines blown down from damaging thunderstorm wind gusts estimated at 65knots (75 mph).Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Marquette County4 NNW Westfield 09 0130CST 0 0 Thunderstorm Wind (56EG)Sheriff deputies reported damage to large trees from thunderstorm wind gusts estimated at 56 knots (64 mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Dane CountyMiddleton 09 0134CST 0 0 2.00K Thunderstorm Wind (65EG)Sheriff deputies reported large trees blown down from damaging thunderstorm wind gusts estimated at 65 knots (75 mph). Alarge tree fell on a house in the 7000 block of Sagebrush Trail, resulting in minor damage.Columbia CountyRio4 SE CambriaNote: The estimated wind gust of 65 knots is equivalent to 75 mph.09 0152CST0210CST 0 0 Thunderstorm Wind (56EG)Sheriff deputies reported sporadic tree damage from thunderstorm wind gusts estimated at 56 knots (65 mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.507

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SoutheastRock CountyEdgerton 09 0155CST0205CST 0 0 Thunderstorm Wind (65EG)Police officials reported tree damage and building damage from thunderstorm wind gusts estimated at 65 knots (75 mph).Note: The estimated wind gust of 65 knots is equivalent to 75 mph.Jefferson County3 SW Lake Mills 09 0200CST0210CST 0 0 Thunderstorm Wind (65EG)Police officials reported considerable tree damage from thunderstorm wind gusts estimated at 65 knots (75 mph).Waukesha CountyDousmanNashotahWashington CountyWest BendJacksonNote: The estimated wind gust of 65 knots is equivalent to 75 mph.09 0230CST0240CST 0 0 Thunderstorm Wind (56EG)Police officials reported trees and power lines blown down from damaging thunderstorm wind gusts estimated at 56 knots (65mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.09 0250CST0255CST 0 0 Thunderstorm Wind (56EG)Police officials reported considerable tree damage from thunderstorm wind gusts estimated at 56 knots (65 mph). The AWOS atWest Bend airport recorded a 60 mph (52 knot) wind gust at 350 am CDT.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Milwaukee County1 SW Milwaukee Timmerman Ap 09 0300CST 0 0 Thunderstorm Wind (54EG)Police officials reported trees blown down from damaging thunderstorm wind gusts. A mesonet site on the campus of DivineSavior-Holy Angels High School measured a thunderstorm wind gust of 62 mph (54 knots) at 4 am CDT.An upper level short wave trough moved rapidly eastward across the Upper Mississippi River Valley and into Wisconsinduring the early morning hours of August 9th. The approaching short wave backed low level winds to the south, which broughta moist, unstable air mass into the region with CAPE values of 2000 to 3000 J/kg. A linear mesoscale convective systemdeveloped over Nebraska and moved eastward across northern Iowa on the nose of the 30-35 knot low-level winds. This systemmoved into Wisconsin shortly after 1 am CDT, with the bowing line of storms producing damaging winds along a 10-milewidepath as it moved rapidly from west to east across South Central and Southeast Wisconsin. The line of thunderstormsextensively damaged trees and downed power lines, including knocking out electrical power to 1,300 Alliant Energy customersin eastern Sauk County and northwest Dane County. Madison Gas and Electric Company reported about 4,000 of theircustomers lost power on the southwest side of Madison. Note: The estimated wind gust of 54 knots is equivalent to 62 mph.WIZ062>064-067>070Dane - Green - Iowa - Jefferson - Lafayette - Rock - Walworth11 1100CST1800CST 0 0 0.00K 0.00K HeatSouthwest winds between departing high pressure to the east of Wisconsin and low pressure developing over the Dakotasbrought a moist Gulf air mass into the area as temperatures warmed into the low to mid 90's. The warm temperatures combinedwith dew points in the lower to middle 70s to produce Heat Index values of 100-104 degrees across parts of southernWisconsin, including the counties of Iowa, Dane, Jefferson, Lafayette, Green, Rock and Walworth.WIZ052Sheboygan12 0100CST0400CST 0 0 Dense FogIncreasing low-level moisture and good radiational cooling conditions led to the formation of dense fog over portions ofsouthern Wisconsin. The dense fog was most concentrated over Sheboygan County where visibilities fell to a 1/4 mile or lessduring the early morning hours of August 12th.508

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SoutheastSauk CountyIronton3 NE Loganville13 1115CST1400CST 0 0 10.00K 0.00K Flash FloodSeveral rounds of thunderstorms produced heavy rain that closed numerous roads, with 1 to 3 feet of water covering theroadways and washing out gravel shoulders. In addition, the thunderstorms knocked over a tree onto power lines that started asmall fire along Highway 136 near North Freedom.Columbia County5 N Okee5 W Dekorra13 1210CST1330CST 0 0 125.00K 0.00K Flash FloodSeveral rounds of thunderstorms produced heavy rain that closed numerous roads in Caledonia Township, west of theWisconsin River and southwest of the city of Portage. The rushing water damaged roadways and washed out gravel shoulders,as well as causing damage to private driveways.Repeated rounds of thunderstorms with heavy rain caused flash flooding in Sauk and Columbia counties. The thunderstormsdeveloped ahead of a warm front, as a low-level jet pushed warm, moist air over the boundary. Surface temperatures in the lowto mid 80's, along with moist dew points in the low 70's, contributed to the instability needed for the thunderstorms as well asprovided ample moisture for the heavy rain. Precipitable water values were over 2 inches. National Weather Service Dopplerradar estimated 5 to 6 inches of rain fell in extreme northwest Sauk County.Green Lake County4 SSW Berlin 20 1407CST1415CST 0 0 100.00K 2.00K Thunderstorm Wind (50EG)County officials reported a tree fell through a house in Berlin. Power lines were reported down by the strong thunderstormgusts, as well as minor crop damage.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Green CountyBrodhead 20 1435CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees and power lines were blown down by the strong thunderstorm gusts.Jefferson CountyWhitewater4 W PalmyraNote: The estimated wind gust of 50 knots is equivalent to 58 mph.20 1445CST1530CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees were blown down in and around the city of Whitewater to just west of Palmyra by thestrong thunderstorm gusts. The damage was produced by three separate storms that trained over the area. There was also urbanflooding in Whitewater and Palmyra caused by 2 inches of rain that fell in 45 minutes.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Rock County2 SW Downtown Janesville 20 1445CST1450CST 0 0 Thunderstorm Wind (50MG)County sheriff deputies reported trees and power lines were blown down by the strong thunderstorm gusts. The AWOS atJanesville airport recorded a 58 mph (50 knot) wind gust at 345 pm CDT.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Dane CountyStoughton 20 1457CST1505CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees and power lines were blown down by the strong thunderstorm gusts.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.509

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SoutheastJefferson CountyFt Atkinson 20 1515CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees were blown down by the strong thunderstorm gusts.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Sauk County8 W La Valle 20 1518CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees were blown down by the strong thunderstorm gusts.Jefferson County4 NW Lake MillsWatertownNote: The estimated wind gust of 50 knots is equivalent to 58 mph.20 1525CST1530CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees were blown down by the strong thunderstorm gusts.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Waukesha CountyStonebank 20 1528CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees were blown down by the strong thunderstorm gusts.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jefferson County4 NE Oak Hill 20 1536CST 0 0 Thunderstorm Wind (50MG)The peak thunderstorm wind gust of 58 mph (50 knots) measured at the National Weather Service office southeast of Sullivan.Note: The measured wind gust of 50 knots is equivalent to 58 mph.Dodge CountyLowell 20 1540CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees were blown down in the Lowell area by the strong thunderstorm gusts.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Washington CountySlinger 20 1545CST 0 0 Thunderstorm Wind (53MG)The peak thunderstorm wind gust of 61 mph (53 knots) was measured at a mesonet site in Slinger.Dodge CountyHoricon3 W LomiraSheboygan CountyOostburgSheboyganNote: The measured wind gust of 53 knots is equivalent to 61 mph.20 1550CST 0 0 Thunderstorm Wind (50EG)County sheriff deputies reported trees were blown down by the strong thunderstorm gusts.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.20 1552CST1600CST 0 0 Thunderstorm Wind (52EG)County Sheriff deputies reported tree damage due to thunderstorm wind gusts along a path from Oostburg to the city ofSheboygan. The Sheboygan C-MAN observation site at the harbor recorded a 49 knot (56 mph) wind gust at 5 pm CDT.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.510

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SoutheastWaukesha County3 SE Pewaukee 20 1600CST 0 0 Thunderstorm Wind (56MG)The peak thunderstorm wind gust of 65 mph (56 knots) measured by a trained spotter.Note: The measured wind gust of 56 knots is equivalent to 64 mph.Washington CountyWest Bend 20 1601CST 0 0 Thunderstorm Wind (64MG)The peak thunderstorm wind gust of 74 mph (64 knots) was measured by a trained spotter in West Bend.Note: The measured wind gust of 64 knots is equivalent to 74 mph.Fond Du Lac County1 NW Eden 20 1610CST 0 0 75.00K Thunderstorm Wind (50EG)Law enforcement officials reported a 100-year old barn was blown down by thunderstorm wind gusts estimated at 50 knots (58mph).Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Marquette CountyOxford 20 1610CST 0 0 Thunderstorm Wind (56EG)An amateur radio operator reported tree damage and power lines blown down onto a home in Oxford by thunderstorm windgusts estimated at 56 knots (65 mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Columbia County5 N Pardeeville 20 1625CST 0 0 Thunderstorm Wind (56EG)The Columbia County emergency manager reported tree damage caused by thunderstorm wind gusts estimated at 56 knots (65mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Sheboygan County3 W Random Lake 20 1625CST 0 0 Thunderstorm Wind (56EG)Fire officials reported tree damage by thunderstorm wind gusts estimated at 56 knots (65 mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Fond Du Lac County3 SE Campbellsport 20 1630CST 0 0 Thunderstorm Wind (70EG)Law enforcement officials reported shingles blown off a home and tree damage by thunderstorm wind gusts estimated at 70knots (81 mph).Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Green Lake CountyDalton 20 1630CST 0 0 Thunderstorm Wind (56EG)The Green Lake County emergency manager reported tree damage caused by thunderstorm wind gusts estimated at 56 knots(65 mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Sheboygan CountyWaldo 20 1630CST 0 0 Thunderstorm Wind (56EG)Fire officials reported tree damage by thunderstorm wind gusts estimated at 56 knots (65 mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Walworth County1 SE Walworth 20 1630CST 0 0 25.00K Thunderstorm Wind (50EG)The Walworth County Emergency Manager reported a pole barn was partially damaged by thunderstorm winds estimated at 50knots (58 mph).Note: The estimated wind gust of 50 knots is equivalent to 58 mph.511

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SoutheastWalworth County2 S Delavan 20 1637CST1641CST 0 0 25.00K Thunderstorm Wind (50EG)The Walworth County Emergency Manager reported tree damage caused by thunderstorm winds estimated at 50 knots (58mph).Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Ozaukee CountyPort Washington 20 1638CST 0 0 Thunderstorm Wind (56EG)Law enforcement officials reported tree damage by thunderstorm wind gusts estimated at 56 knots (65 mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Green Lake County2 ESE Green Lake 20 1640CST1642CST 0 0 Thunderstorm Wind (87EG)Based on a report from county emergency managers, an NWS storm survey team determined damage located near the northeastshore of Green Lake was caused by microburst winds estimated at 100 mph (81 knots). Eight homes, a boat and two piers weredamaged by the winds. Four dozen trees were uprooted or snapped along the path of the microburst winds.Sheboygan CountySheboygan FallsKohlerNote: The estimated wind gust of 87 knots is equivalent to 100 mph.20 1640CST 0 0 Thunderstorm Wind (56EG)Fire officials reported tree damage by thunderstorm wind gusts estimated at 56 knots (65 mph).Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Sheboygan CountyHowards Grove 20 1645CST 0 0 Thunderstorm Wind (56EG)Fire officials reported tree damage by thunderstorm wind gusts estimated at 56 knots (65 mph).A short wave moving up the leading flank of an elongated large-scale trough that extended from the Upper Mississippi RiverValley to the Central Plains provided large-scale lift for thunderstorm development over southern Wisconsin. A warm frontextended across central Wisconsin back to surface low pressure over west-central Minnesota. This placed southern Wisconsinin a warm humid air mass, with temperatures in the 80's and dew points in the lower 70's producing CAPE values reaching2000 J/kg. Deep-layer shear profiles were favorable for supercells as well as multicell line segments that produced damagingwind gusts. The thunderstorm winds caused widespread tree and power line damage. WE energies reported 23,000 customerswere without power. Note: The estimated wind gust of 56 knots is equivalent to 64 mph.WIZ058Dodge22 0300CST0700CST 0 0 Dense FogLight winds and a lingering humid air mass over the region led to the formation of dense fog over a small part of SoutheastWisconsin. While many areas saw visibilities fall to 1/2 mile to 1 mile, only Dodge County experienced dense fog withvisibilities of 1/8 to 1/4 mile.WISCONSIN, SouthwestLa Crosse County1 SW Herrington1 ENE Calvert08 0445CST0645CST 0 0 90.00K 0.00K FloodStreet flooding occurred in parts of the city of La Crosse after heavy rains fell during the morning hours. Flooding alongDiagonal Road caused a house foundation to collapse filling the basement with mud. The house was later condemned andrazed. Losey Avenue near Main Street was under water temporarily. The automated weather observing equipment at the LaCrosse Airport recorded 1.65 inches of rainfall in one hour, ending at 0453 CST, while 2.11 inches fell in the two hoursbetween 0341 CST and 0541 CST. Also, 2.21 inches of rain was observed at the La Crosse National Weather Service officebetween the hours of 0324 CST and 0533 CST.512

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SouthwestCrawford CountyMt Zion 08 0530CST0630CST 0 0 0.00K 0.00K Heavy RainGrant County2 WNW Boscobel1 SW PotosiIn one hour, 2.21 inches of rain was measured.08 0700CST1200CST 0 0 300.00K 0.00K FloodWidespread rainfall amounts of 2 to 3 inches fell in two hours across much of the eastern half of Grant County. Many roadsthroughout the county were underwater and closed temporarily, including U.S. Highway 151 near Platteville. Damage didoccur to some roads as well as to homes and businesses. The cities that had the worst impacts included Boscobel, Fennimore,Livingston, Cuba City, Kieler, and Hazel Green.Grant County2 NW Cuba City 08 0730CST0930CST 0 0 0.00K 0.00K Heavy RainIn two hours, 3.69 inches of rain fell 2 miles northwest of Cuba City.Grant County2 ENE Rockville 08 1230CST2045CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Platte River near Rockville out of its banks on August 8th. The river exceeded the flood stageby almost a foot and a half, cresting at 10.43 feet.Thunderstorms developed along a warm front in central Minnesota during the evening of August 7th. These storms movedsoutheast during the overnight and early morning hours of August 8th, bringing widespread rainfall amounts of two to threeinches to the area. Flooding was observed across the eastern half of Grant County, which caused damages to roads, homes andother structures. Also, street flooding was observed in parts of the city of La Crosse (La Crosse County) due to the quick heavyrains.Grant County1 SSE Lancaster 09 0005CST 0 0 20.00K 0.00K Thunderstorm Wind (60EG)A large tree was uprooted by strong thunderstorm winds. The tree fell on and damaged an outbuilding, while also causingdamage to utility lines that were pulled from the ground.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Richland County1 E Basswood 09 0021CST 0 0 15.00K 0.00K Thunderstorm Wind (55EG)Thunderstorm winds blew the roof off of a shed, as well as damaging trees along Town Hall Road, which is just east of thetown of Basswood.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Richland County2 W Loyd 09 0038CST 0 0 20.00K 0.00K Thunderstorm Wind (55EG)Damage occurred to the roof of a home, as well as to a shed at a homestead along County Road NN. Also, trees and powerlines were blown down between Ithaca and Cazenovia.Note: The estimated wind gust of 55 knots is equivalent to 63 mph.Richland CountyYuba 09 0845CST1100CST 0 0 0.00K 0.00K FloodFlooding was reported near County Road C, outside of Yuba.Vernon County1 NNE Chaseburg 09 1000CST1600CST 0 0 0.00K 0.00K FloodState Highway 162 in Chaseburg was underwater.513

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SouthwestVernon County3 W La Farge 09 1000CST1600CST 0 0 0.00K 0.00K FloodTunnelville Road was underwater after heavy rains fell in the area.A line of thunderstorms developed in western Iowa ahead of a trough of low pressure in the Central Plains on the afternoon ofAugust 8th. These storms moved into southwest Wisconsin during the early morning hours of August 9th. Strong windscaused damage across the area, while heavy rains combined with saturated conditions to cause flooding, leading to roadclosures in parts of the area.Clark County4 WNW Greenwood 11 0120CST 0 0 0.25K 0.00K Thunderstorm Wind (50EG)Trees were blown as thunderstorms passed, which blocked County Road MM.Thunderstorms developed over west central Wisconsin as an upper level system moved across the region. These storms movedeast into central Wisconsin, which brought strong winds to the area during the early morning hours of August 11th. Note: Theestimated wind gust of 50 knots is equivalent to 58 mph.WIZ054Crawford11 1345CST1500CST 0 0 0.00K 0.00K Heat12 0945CST1500CST 0 0 0.00K 0.00K HeatThe combination of very warm temperatures and high dew points led to extreme apparent temperature values across southwestWisconsin on the 11th and 12th. The apparent temperature at Prairie Du Chien (Crawford County) was at or above 105 degreeson the afternoon of the 11th, as well as in the late morning and afternoon on the 12th. The maximum apparent temperature was112 degrees, which occurred on the morning of August 12th.Buffalo County4 SE Nelson 13 0335CST0339CST 0 0 2.00K 0.00K Thunderstorm Wind (60EG)Trees were blown down between Alma and Nelson.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Buffalo CountyAlma 13 0400CST0600CST 0 0 0.00K 0.00K Heavy RainIn two hours, 3.45 inches of rain fell.Trempealeau CountyIndependence 13 0410CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Many trees were blown down, while tin was blown off of a barn roof.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Trempealeau County2 NW Blair 13 0415CST0600CST 0 0 0.00K 0.00K Heavy RainTotal rainfall measured was 2.00 inches.Trempealeau County1 N Independence 13 0415CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Large tree limbs were blown down across power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.514

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SouthwestTrempealeau County3 ENE Blair 13 0425CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Power lines were blown down, which temporarily closed State Highway 95.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Trempealeau County2 ENE Pigeon Falls 13 0425CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)State Highway 121 was closed temporarily due to downed power lines.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Trempealeau CountyIndependence 13 0500CST1200CST 0 0 30.00K 0.00K Flash FloodBetween the hours of 4:15 a.m. and 6:00 a.m. CST, 4.00 inches of rain fell in Independence. This caused flash flooding in theIndependence area with water over various roadways and culverts. Some area roads were washed out while creeks wereflowing out of their banks.Trempealeau CountyWhitehall 13 0500CST0800CST 0 0 0.00K 0.00K Heavy RainIn three hours, 3.17 inches of rain fell.Trempealeau CountyElk Creek 13 0509CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Many trees were blown down in the Elk Creek area.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Trempealeau CountyBlair 13 0525CST 0 0 2.00K 0.00K Thunderstorm Wind (50EG)Trees and power lines were blown down in the city of Blair.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Trempealeau County2 N Whitehall 13 0527CST 0 0 0.00K 0.00K Hail (1.00)Buffalo County6 NNW Dodge 13150530CST1430CST 0 0 1.69M 0.00K Flash FloodVarious roads were closed across the county including County Road EE, which had buckled. Also, 31 mudslides were reported,while multiple homes in Cream had water in their basements. Therefore, significant damage occurred to some roads, homes andbusinesses. The areas most affected by flooding, mudslides and road closures were along Waumandee Creek from Gilmanton tosouth of Waumandee.Trempealeau County1 N Trempealeau 13 0530CST0645CST 0 0 0.00K 0.00K Heavy RainRainfall amounted to 2.20 inches between 5:30 a.m. and 6:45 a.m. CST, with 1.80 inches falling in the first 45 minutes.Vernon County1 NW Valley 13 0530CST0930CST 0 0 0.00K 0.00K Heavy RainTotal measured rainfall was 3.75 inches.515

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SouthwestJackson CountyTaylor 13 0535CST0538CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Many trees and power poles were blown down across western Jackson County. Tree damage was reported in and around thecities of Taylor, York, and Northfield. This caused power outages to many towns and rural customers. Also, 3.90 inches of rainwas measured in the city of Taylor between 5:25 a.m. and 8:00 a.m. CST.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Jackson County4 SSE Alma Center 13 0543CST0547CST 0 0 5.00K 0.00K Thunderstorm Wind (50EG)Many trees and power lines were blown down in the central part of the county, which included the cities of Alma Center,Merrillan and Black River Falls. The damage caused power outages to towns and rural areas.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Monroe County4 W Sparta 13 0605CST 0 0 0.20K 0.00K Thunderstorm Wind (50EG)Damage was reported to a rural street sign along Garden Avenue on the county line between Monroe and La Crosse Counties.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Monroe CountyTomah 13 0622CST 0 0 1.00K 0.00K Thunderstorm Wind (50EG)A tree was blown down, while damage was also reported to a parking lot light at a local business in Tomah.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Monroe CountyWilton 13 0629CST 0 0 0.25K 0.00K Thunderstorm Wind (50EG)Trees were blown down in Wilton.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.Buffalo County1 ESE Praag 13 0630CST1430CST 0 0 10.00K 0.00K Flash FloodA mudslide hit and damaged a house, while some flooding was also reported.Trempealeau County3 SW Arcadia2 ENE Hegg13150630CST0800CST 0 0 257.40K 0.00K Flash FloodMany roads were underwater, while there were also several mudslides reported across the northern part of the county.Driveways and culverts were washed out in the towns of Chimney Rock, Hale, Burnside and Arcadia, while a bridge atBurnside was also washed out. Also, Huskeohs Road was washed out, the Lindberg bridge in Blair was underwater, andHighway 53/121 from Pigeon Falls to the Jackson County line was closed. Roads underwater continued to impact these areasthrough 8:00 a.m. CST on Sunday, August 15th.Buffalo County1 SW Waumandee2 ESE Glencoe13 0630CST1230CST 0 0 50.00K 0.00K FloodTwo homes were flooded with water up to the first floor windows, causing significant damage to both homes.Buffalo County1 ENE Trevino3 NNW Nelson13 0700CST1100CST 0 0 103.00K 0.00K Flash Flood516

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SouthwestSeveral mudslides occurred in and around the Nelson area, causing significant damage to the road systems. Several of thesmaller creeks were out of their banks and over the bridge crossings. Rainfall between the hours of 3:30 a.m. and 7:30 a.m.CST was estimated to be around five inches.La Crosse County1 NE La Crosse 13 0700CST0900CST 0 0 0.00K 0.00K FloodThree feet of standing water was reported at the intersection of Cass Street and 15th Street South. Street flooding was reportedelsewhere throughout the city of La Crosse.Juneau County2 NNE Lyndon Station 13 0710CST 0 0 0.00K 0.00K Thunderstorm Wind (58EG)A wind gust of 67 mph was estimated along State Highway 82 near the Juneau and Adams County border.Note: The estimated wind gust of 58 knots is equivalent to 67 mph.Juneau CountyLyndon Station 13 0711CST 0 0 0.00K 0.00K Thunderstorm Wind (60MG)Vernon County2 N Springville 1314A thunderstorm wind gust of 69 mph was measured at Lyndon Station.Note: The measured wind gust of 60 knots is equivalent to 69 mph.0930CST2030CST 0 0 490.00K 0.00K LightningLightning struck a rural church northwest of Viroqua as thunderstorms moved through the morning of August 13th. The areaof the church that was struck smoldered for a day before the fire broke out in the afternoon of August 14th. The entire churchwas destroyed by the fire.Vernon County4 E Trippville1 NW Ontario13151100CST1400CST 0 0 934.30K 0.00K Flash FloodAt least 30 roads throughout the county were closed due to high water and washouts. Some of the major roads closed includedState Highways 131 and 33 around Ontario, as well as State Highway 162 near Chaseburg. Also, the West Fork KickapooRiver was over the intersection of State Highway 56 and County Road S.Richland County4 N Viola2 N Cazenovia13151100CST0800CST 0 0 0.00K 0.00K FloodMany roads across the northern half of the county were closed due to high water. State Highway 80 was closed in severalplaces, as was State Highway 56 east of Viola and County Highway N and State Highway 58 near Ithica. Also, Willow Creekand Melancthon Creek, as well as their smaller tributaries were high or out of their banks in many places.Vernon CountyHillsboro Kckapoo Ar 13 1100CST1930CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the South Branch of the Baraboo River out of its banks in Hillsboro on August 13th. The riverexceeded the flood stage by two and a half feet, cresting at 15.56 feet.Richland County1 N Yuba 13 1138CST2300CST 0 0 0.00K 0.00K FloodThe Pine River was high or out of its banks in many locations. At County Road C, it was close to topping the bridge.517

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SouthwestJackson County1 NW Requa6 E Price13 1200CST 0 0 297.30K 0.00K Flood14Various roads were closed across parts of Jackson county and sustained damage from flooding. The flooding also causeddamage to some parks and utility systems.Trempealeau CountyElk Creek 13 1318CST1700CST 0 0 0.00K 0.00K FloodElk Creek was flowing out of its banks.Vernon CountyOntario 13 1415CST1845CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Kickapoo River out of its banks in Ontario on August 13th. The river exceeded the flood stageby a half foot, cresting at 18.52 feet.Grant CountyCuba City 13 1556CST1800CST 0 0 0.00K 0.00K FloodStreet flooding was reported after heavy rains in Cuba City.Vernon County2 N Rockton 13141600CST0900CST 0 0 0.00K 0.00K FloodThe Kickapoo River was over Bridge 8 along Winchell Valley Road, as well as over County Highway P near Bridge 10.Vernon County1 WNW La Farge 13141945CST1200CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Kickapoo River out of its banks in La Farge on August 13th and 14th. The river exceeded theflood stage by a half foot, cresting at 12.54 feet.Vernon CountyReadstown 13162045CST1415CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Kickapoo River out of its banks in Readstown from August 13th through the 16th. The riverexceeded the flood stage by almost two feet, cresting at 13.98 feet.Vernon County3 ESE Liberty3 NE Kickapoo Center14160400CST0600CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Kickapoo River out of its banks in Viola from August 14th through the 16th. The riverexceeded the flood stage by over three feet, cresting at 17.25 feet.Crawford CountySoldiers Grove 14170600CST0700CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Kickapoo River out of its banks in Soldiers Grove from August 14th through the 17th. The riverexceeded the flood stage by over a foot and a half, cresting at 14.68 feet.Crawford County3 NNW Bell Center 14180700CST1300CST 0 0 0.00K 0.00K Flood518

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SouthwestLocally heavy rains pushed the Kickapoo River out of its banks in Gays Mills from August 14th through the 18th. The riverexceeded the flood stage by almost two and a half feet, cresting at 15.43 feet.Trempealeau County2 W Pine Creek 15180700CST1100CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Trempealeau River at Dodge out of its banks from August 15th through the 18th. The riverexceeded the flood stage by over two feet, cresting at 11.08 feet.Crawford CountySteuben 16190500CST1900CST 0 0 0.00K 0.00K FloodLocally heavy rains pushed the Kickapoo River out of its banks in Steuben from August 16th through the 19th. The riverexceeded the flood stage by almost a foot and a half, cresting at 13.4 feet.A line of severe thunderstorms moved out of Minnesota and into western and central Wisconsin during the morning hours ofAugust 13th. Strong winds created tree and minor structural damage, while widespread heavy rain of 3 to 4 inches causedsome flash flooding, road closures, and rises along rivers, streams and creeks. Significant damage occurred to roads, homesand businesses in west central Wisconsin due to the flooding with an estimated $2.78 million in damage to public sectorinfrastructure. More thunderstorms developed south of the initial storms across southwest Wisconsin, which brought heavyrains and caused flooding problems into the afternoon hours.La Crosse CountyLa Crosse 20 1340CST 0 0 0.75K 0.00K Thunderstorm Wind (52EG)Power lines were blown down in the cities of La Crosse and Onalaska.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.La Crosse CountyOnalaska 20 1342CST 0 0 0.25K 0.00K Thunderstorm Wind (52EG)Large tree limbs were blown down.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.La Crosse County1 ESE New Amsterdam 20 1409CST 0 0 5.00K 0.00K LightningLightning hit a large staple holding the wooden trusses together in the attic of a house. The fire was confined by firefighters tothe attic.Richland County1 NW Lone Rock 20 1500CST 0 0 0.25K 0.00K Thunderstorm Wind (60EG)Trees were blown down near the intersection of U.S. Highway 14 and State Highway 130.Note: The estimated wind gust of 60 knots is equivalent to 69 mph.Richland County2 E Hub City 20 1509CST 0 0 0.25K 0.00K Thunderstorm Wind (52EG)Trees were blown down along Hawkins Creek.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Adams County5 SE Plainville 20 1535CST 0 0 0.00K 0.00K Thunderstorm Wind (50EG)A trained spotter estimated a thunderstorm wind gust at 58 mph.Note: The estimated wind gust of 50 knots is equivalent to 58 mph.519

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, SouthwestJuneau County1 SE Lyndon Station 20 1535CST 0 0 0.25K 0.00K Thunderstorm Wind (52EG)Tree limbs were blown down in and south of Lyndon Station.Thunderstorms developed early in the afternoon of August 20th ahead of a cold front. As these storms moved across westernWisconsin they produced severe wind gusts that knocked down some trees and power lines. A lightning strike also started astructure fire north of Holmen (La Crosse County). Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Buffalo County3 ENE Tell 31 1922CST2230CST 0 0 0.00K 0.00K Flash FloodA mudslide pushed water onto State Highway 37 southwest of the intersection with County Road N. A 24 hour total (ending at6 a.m. CST) of 3.37 inches of rain was reported at Alma Lock and Dam 4.Vernon County3 NW Liberty Pole2 S Viroqua31 2015CST2018CST 0 0 27.00K 1.00K Thunderstorm Wind (52EG)WISCONSIN, WestA swath of wind damage was found across central Vernon County southwest through south of Viroqua along County Road NNand Getter Road. In this area, approximately 4 miles southwest of Viroqua, a barn was damaged and a roof was taken off agarage. Farther east along Getter Road, a barn was leveled, a small metal shed was destroyed and a field of sunflowers wasdamaged. The damage was initially believed to be caused by a tornado, but the storm survey did not find sufficient evidence toclassify this as a tornado.Thunderstorms developed ahead of a cold front and tracked across western Wisconsin during the evening of August 30th.These thunderstorms produced some wind damage and a mudslide east of Alma (Buffalo County). Note: The estimated windgust of 52 knots is equivalent to 60 mph.Polk County5 E Luck 07 2237CST2240CST 2.77 100 0 1 100.00K 0.00K Tornado (EF0)A National Weather Service Storm Damage Survey determined that an EF-0 touched down two miles west of Bone Lake, toabout one mile south of Bone Lake, Wisconsin. Damage was extensive to hundreds of large trees that included several two footdiameter Pine Trees. Structural damage included shingles blown off a home, car and home windows blown out, and a woodentrailer tossed into a tree.Barron County1 NNW Cumberland 07 2257CST2300CST 0 8 100.00K 0.00K Thunderstorm Wind (70EG)A National Weather Service Storm Damage Survey determined that downburst winds caused substantial tree damage north ofCumberland, Wisconsin. In addition, a local business roof was blown off just north of Cumberland, and several trailers in EaglePoint Campground were damaged.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Barron County3 SSE Barronett 07 2257CST2301CST 3.18 125 0 0 250.00K 0.00K Tornado (EF1)A National Weather Service Storm Damage Survey determined that an EF-1 tornado touched down approximately 4.5 milesnorth-northeast of Cumberland, and tracked east-southeast to approximately six miles northeast of Cumberland, Wisconsin.Structural damage was confined to a barn and garage destroyed. Hundreds of trees were either uprooted and blown down, andseveral of the large trees were in excess of four feet in diameter.Several short-lived supercell thunderstorms that moved across central Minnesota during the late evening of Saturday August7th, moved into Polk and Barron County, Wisconsin prior to midnight and produced several rounds of severe down burstwinds, and two tornadoes near Luck, and Cumberland, Wisconsin.Pierce County1 SE River Falls Arpt 08 1837CST1839CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)An 18 inch diameter tree was blown down near River Falls, Wisconsin. In addtion, another trained spotter reported a funnelcloud west of River Falls.520

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, WestDuring the late afternoon and early evening hours of Sunday August 8th, severe thunderstorms developed across the northernsuburbs of the Twin Cities. Movement of the storms were very slow due to weak low level flow in the first 5000 ft. Most of thethunderstorms were outflow dominate and caused mainly downburst wind damage.The storms drifted to the southeast into west-central Wisconsin and caused a severe wind gust, along with a funnel cloud report.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Polk County1 NNE St Croix Falls 10 1800CST1801CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Polk County2 SE Nye1 ESE WanderoosA large tree was blown over in St. Croix Falls, Wisconsin.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.10 1805CST1815CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Pierce County1 NNW River Falls 1011A large tree was blown down east of Osceola, Wisconsin, and west of Amery, Wisconsin.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.2230CST0230CST 0 0 0.00K 0.00K Flash FloodNumerous cars were stalled across the city of River Falls, Wisconsin due to rainfall amounts of three to five inches in less than4 hours.Pierce CountySpring Valley 10112230CST0230CST 0 0 0.00K 0.00K Flash FloodLocal officials reported six inches of running water over several roads in Spring Valley, Wisconsin.Pierce County1 E Prescott 10112230CST0230CST 0 0 0.00K 0.00K Flash FloodSeveral cars had stalled due to excessive water on roadways in Prescott, Wisconsin.Dunn County1 NW Cedar Falls 10112300CST0400CST 0 0 0.00K 0.00K Heavy RainPierce County2 SE River Falls Arpt 1011Polk CountyClear Lake 1011St. Croix County1 S Glenwood City 1011An observer reported 6.00 inches of rainfall overnight.2300CST0400CST 0 0 0.00K 0.00K Heavy RainAn observer reported 5.07 inches of rainfall overnight.2300CST0400CST 0 0 0.00K 0.00K Heavy RainAn observer reported 3.25 inches of rainfall overnight.2300CST0400CST 0 0 0.00K 0.00K Heavy RainAn observer reported 6.25 inches of rainfall overnight.521

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, WestChippewa County2 WNW Cornell 11 0030CST0330CST 0 0 0.00K 0.00K Flash FloodSignificant street flooding was reported in Cornell, Wisconsin where storm sewers were overflowing. Overnight rainfall reportswere averaging between three and five inches across the county.Chippewa County1 SW Cornell 11 0040CST0042CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Several 4 to 6 inch diameter tree limbs were blown down in Cornell, Wisconsin.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Dunn CountyColfax 11 0100CST0400CST 0 0 0.00K 0.00K Flash FloodSignificant flooding was observed across much of the northern half of Dunn County. Roads were washed out in ColfaxTownship, south of Colfax. More roads were washed out in Lucas Township. Several observers reported between three and sixinches of rainfall overnight across the county.Eau Claire County1 SSE Eau Claire 11 0100CST0400CST 0 0 0.00K 0.00K Flash FloodMajor street flooding was reported on Hastings Way, and Valmont Avenue in Eau Claire, Wisconsin, which was observed tohave over 8 inches of water across the road.Polk CountyClayton 11 0100CST0400CST 0 0 0.00K 0.00K Flash FloodAn observer in Clayton, Wisconsin, reported basement flooding with approxmately two inches of water covering the floor.St. Croix CountyWoodville 11 0100CST0400CST 0 0 0.00K 0.00K Flash FloodSignificant flood waters were washing over several roads in Woodville, Wisconsin. Some residents in town had flood waters intheir home. A few observers reported rainfall totals overnight around six inches.St. Croix County1 SE Baldwin 11 0100CST0400CST 0 0 0.00K 0.00K Flash FloodAn apartment building and nursing home was evacuated due to flood waters. The southeast portion of Baldwin was hardest hit.A concrete bridge was washed out in town, along with 15 feet of roadway.Several rounds of heavy rainfall led to signficant flash flooding in portions of east-central Minnesota, and west-centralWisconsin. Several areas from Prescott, Wisconsin, northeast to River Falls and Menomonie, has several inches of rainfall in ashort period of time that led to flash flooding. Several observers reported rainfall rates as high as 2 inches per hour, with onereport of 4.91 inches in less than four hours near Menomonie, Wisconsin.In St. Croix County... emergency managers reported flash flooding in Baldwin, Woodville, Wilson, Hammond, Springfield, andCady. Several roadways and bridges were closed due to washouts. In Baldwin, 16 people were evacuated from an assistedliving facility and were taken to a local hospital. Another 24 individuals were evacuated from an apartment complex.In Chippewa County, roads and shoulder damage was reported, with a handful of roads closed due to washouts.In Pierce County, Highway 63 north of Highway 29 was closed due to a bridge that was washout. County road N, north of ElPaso was closed due to water over the road. Plus, Highway 10 over the Rush River was closed due to high water. Severalhomes along the Rush River were evacuated due to roads leading to the residences washout. The town of Martell had severalreports of basement walls collapsing due to the flood waters. In addition, some minor wind damage also occurred with someof the thunderstorm cells.522

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WISCONSIN, WestPolk County1 N Dresser 13 1545CST1547CST 0 0 10.00K 0.00K Thunderstorm Wind (52EG)Several trees and power lines were blown down near Dresser, Wisconsin.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Polk CountyLoraine 13 1615CST1617CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Numerous trees were blown down near McKinley, including one partially blocking Highway 48 east of town.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.St. Croix County2 N River Falls 13 1713CST 0 0 0.00K 0.00K Hail (0.75)Chippewa County2 WSW Cornell 13 1830CST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)A large tree was blown down near Cornell, Wisconsin.A line of severe thunderstorms that developed east of Alexandria, Minnesota, during the afternoon of August 13th, quicklymoved eastward into west-central Wisconsin by the late afternoon and early evening and produced isolated wind damage.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Rusk County1 SE Hawkins 20 0557CST 0 0 0.00K 0.00K Hail (1.00)A complex of thunderstorms that moved across central Minnesota during the overnight hours of August 20th, produced severalstrong storms in west-central Wisconsin, one of which produced large hail near Hawkins, Wisconsin.WYOMING, Central and WestNatrona County3 SSE Madden 04 1346MST 0 0 0.00K 0.00K Hail (0.88)A motorist reported nickel sized hail six miles west of Hiland on U.S. Highway 20/26.Natrona County5 WSW Alcova 04 1355MST 0 0 0.00K 0.00K Funnel CloudThe public reported a funnel cloud near State Highway 220 approximately five miles west of Alcova.Natrona County5 WSW Alcova 04 1355MST 0 0 0.00K 0.00K Hail (0.88)The public reported nickel sized hail five miles west of Alcova on State Highway 220.Natrona County3 SE Hiland 04 1356MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)An automated sensor near Hiland recorded a 60 mph wind gust.Note: The measured wind gust of 52 knots is equivalent to 60 mph.Natrona County1 NNE Casper 04 1424MST 0 0 0.00K 0.00K Thunderstorm Wind (63MG)A 73 mph wind gust was recorded atop the Wyoming Medical Center.Note: The measured wind gust of 63 knots is equivalent to 72 mph.523

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WYOMING, Central and WestJohnson County2 E Buffalo 04 1830MST 0 0 0.00K 0.00K Funnel CloudA narrow funnel cloud was seen two miles east of Buffalo.Johnson County2 E Buffalo 04 1830MST 0 0 0.00K 0.00K Hail (0.88)The public reported nickel sized hail two miles east of Buffalo.Johnson CountyBuffalo Arpt 04 1832MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)A wind gust of 59 mph was recorded at Johnson County Airport in Buffalo.A line of severe thunderstorms formed along an outflow boundary that moved east across the Wind River Basin into Natronaand Johnson counties. Note: The measured wind gust of 51 knots is equivalent to 59 mph.Fremont County9 N Midvale 06 1525MST 0 0 0.00K 40.00K LightningLightning struck a haystack at approximately 1525MST on Friday, August 6. The stack, containing 400 tons of premium hay,smoldered for three days before becoming engulfed with flames around 1830MST Monday, August 9. Despite a large responseby fire personnel, the entire stack was lost.Lightning struck a haystack north of Missouri Valley eventually causing a large fire.Park County(COD)Yellowstone Apt 06 1605MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)The AWOS at Yellowstone Regional Airport recorded a thunderstorm wind gust of 59 mph.A thunderstorm formed southeast of Cody and moved over the airport, producing a severe wind gust. Note: The measuredwind gust of 51 knots is equivalent to 59 mph.Big Horn County8 NNE Emblem 12 1411MST1420MST 2.44 30 0 0 0.00K 0.00K Tornado (EF0)Several reports were received from public sources of a small tornado being viewed looking west from U.S. Highway 310between Greybull and Lovell.Isolated thunderstorms formed over the Big Horn Basin, one of which produced a brief landspout tornado.A landspout tornado was seen west of U.S. Highway 310 between Greybull and Lovell, WY.524

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WYOMING, Central and WestFremont County(LND)Hunt Fld Lander 22 1527MST1538MST 0 0 0.00K 0.00K Thunderstorm Wind (56MG)A thunderstorm moved off the Wind River Mountains over Lander and generated a wind gust of 64 mph at Hunt Field.A thunderstorm formed over the Wind River Mountains and produced severe wind gusts at Hunt Field in Lander. Note: Themeasured wind gust of 56 knots is equivalent to 64 mph.Hot Springs County9 NNE Hamilton Dome 28 1310MST 0 0 0.00K 0.00K Hail (0.75)The Hot Springs County emergency manager reported penny sized hail along State Highway 120 approximately 23 milesnorthwest of Thermopolis.Sweetwater County(RKS)Rock Spgs Arpt 28 1934MST 0 0 0.00K 0.00K Thunderstorm Wind (52MG)A strong thunderstorm produced a wind gust to 60 mph at Rock Springs-Sweetwater County Airport.Scattered strong thunderstorms formed across western and central Wyoming during the afternoon hours. Note: The measuredwind gust of 52 knots is equivalent to 60 mph.Sweetwater County(RKS)Rock Spgs Arpt 29 1359MST 0 0 0.00K 0.00K Thunderstorm Wind (55MG)A thunderstorm wind gust of 63 mph was measured by ASOS at Rock Springs-Sweetwater County Airport.A strong thunderstorm generated gusty outflow wind at Rock Springs-Sweetwater County Airport. Note: The measured windgust of 55 knots is equivalent to 63 mph.Park County3 SSE (COD)Yellowstone Apt 30 0905MST0911MST 0 0 0.00K 0.00K Hail (0.75)Hail ranging from pea to penny size fell for six minutes about four miles southeast of Cody.An isolated thunderstorm rumbled across Park County producing penny sized hail.Hot Springs County2 SSE Crosby 30 1150MST 0 0 0.00K 0.00K Hail (1.50)Ping pong ball sized hail fell just east of State Highway 789 near Lucerne.Washakie County4 SW Ten Sleep ArptTen Sleep30 1251MST1300MST 4.55 30 0 0 70.00K 0.00K Tornado (EF1)A tornado swept through Juniper trees on a high ridge before descending the hillside into the Nowood River Valley southeast ofTen Sleep. The tornado destroyed several well-built out buildings and downed at least 20, century-old Cottonwood trees onranches in the valley.Washakie County2 S Ten Sleep 30 1257MST1303MST 0 0 30.00K 25.00K Hail (1.50)Ping pong ball sized hail fell for several minutes at ranches just west of State Highway 434. Substantial damage was done to thesorghum crop at one ranch.Washakie County2 S Ten Sleep 30 1257MST1303MST 0 0 50.00K 0.00K Thunderstorm Wind (74MG)Ping pong ball sized hail driven by wind gusts estimated to be around 85 mph damaged roofs, rain gutters, windows, and sidingof several homes in the Nowood River Valley south of Ten Sleep. The wind also ripped metal roofing from a garage, whileanother garage was significantly damaged by a toppled Cottonwood tree. A rear flank downdraft associated with a nearbysupercell thunderstorm was responsible for the damaging wind.Note: The measured wind gust of 74 knots is equivalent to 85 mph.525

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WYOMING, Central and WestWashakie CountyTen Sleep 30 1300MST1304MST 0 0 0.00K 0.00K Funnel CloudA funnel cloud which appeared white continued to spin for several minutes after a tornado dissipated.Washakie CountyTen Sleep Arpt 30 1300MST1315MST 0 0 0.00K 0.00K Hail (2.00)Hail of one to two inches in diameter fell for 15 minutes just to the south and southeast of Ten Sleep near State Highway 434.Washakie County4 NNE Ten Sleep 30 1309MST 0 0 0.00K 0.00K Hail (0.75)Penny sized hail fell at the Wigwam Fish Rearing Station east of Ten Sleep.A supercell thunderstorm formed over northern Hot Springs County and swept east-northeast across the Badlands througheastern Washakie County. The severe storm eventually moved into the Nowood River Valley south of Ten Sleep. Along its 40-mile track, the thunderstorm produced ping pong to golf ball sized hail and an EF1 tornado.WYOMING, Extreme SouthwestUinta County3 NW Spring Vly 04 1221MST 0 0 0.00K 0.00K Thunderstorm Wind (51MG)The WYDOT sensor at First Divide along I-80 reported a maximum wind gust of 59 mph.Strong gusty winds were recorded from a thunderstorm passing through Uinta County Wyoming. Note: The measured windgust of 51 knots is equivalent to 59 mph.Uinta County2 SE Antelope 22 1543MST 0 0 0.00K 0.00K Thunderstorm Wind (50MG)WYOMING, NortheastThe Muddy Creek RAWS recorded a maximum wind gust of 58 mph.Another thunderstorm passing through Uinta County Wyoming produced severe gusty winds. Note: The measured wind gustof 50 knots is equivalent to 58 mph.Crook County4 W New Haven 01 1930MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Crook County4 NE Carlile 01 1935MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Crook County4 NE Carlile 01 2000MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Crook County5 NNW Alva 01 2010MST 0 0 0.00K 0.00K Hail (0.75)526

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WYOMING, NortheastCrook County5 N Aladdin 01 2040MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Crook County9 W Beulah 01 2115MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.A severe thunderstorm produced hail and wind gusts around 60 mph across the Bear Lodge Mountains. Note: The estimatedwind gust of 52 knots is equivalent to 60 mph.Campbell County13 SSW Rozet 03 1002MST1007MST 0.05 10 0 0 1.00K 0.00K Tornado (EF0)A needle-shaped tornado caused minor damage to a shed at the Caballo Coal Mine.A small tornado briefly touched down southeast of Gillette.Campbell County6 WSW Recluse 12 1555MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph at Spotted Horse.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Campbell County6 WNW Recluse 12 1600MST 0 0 0.00K 0.00K Hail (1.00)Campbell County8 NE Recluse 12 1630MST 0 0 0.00K 0.00K Hail (1.00)Campbell County11 SW Rockypoint 12 1642MST 0 0 0.00K 0.00K Hail (1.00)Campbell County10 SSW Rockypoint 12 1655MST 0 0 0.00K 0.00K Hail (1.00)Campbell County10 SSW Rockypoint 12 1655MST 0 0 2.00K 0.00K Thunderstorm Wind (61EG)The combination of hail and wind caused minor damage to an automobile.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Crook County4 W New Haven 12 1707MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Crook County10 NNE New Haven 12 1715MST 0 0 0.00K 0.00K Hail (1.50)The ground was covered by hail.Crook County10 NNE New Haven 12 1715MST 0 0 5.00K 0.00K Thunderstorm Wind (52EG)Wind-driven hail punched holes in the siding and broke windows of a mobile home.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.527

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WYOMING, NortheastCrook CountyNew Haven 12 1717MST 0 0 0.00K 0.00K Hail (1.00)Crook CountyNew Haven 12 1717MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph in New Haven.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Crook County8 NNW Hulett 12 1730MST 0 0 0.00K 0.00K Hail (1.00)Hail covered the ground. 1.25 inches of rain fell in 20 minutes.Crook County16 NE New Haven 12 1730MST 0 0 0.00K 0.00K Hail (0.75)Crook County15 N Hulett 12 1730MST 0 0 0.00K 0.00K Hail (1.00)Crook County15 N Hulett 12 1730MST 0 0 3.00K 0.00K Thunderstorm Wind (61EG)Wind-driven hail broke house windows.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.Crook County8 NNW Hulett 12 1730MST 0 0 0.00K 0.00K Thunderstorm Wind (56EG)Wind gusts were estimated at 65 mph.Note: The estimated wind gust of 56 knots is equivalent to 64 mph.Crook County16 NE New Haven 12 1730MST 0 0 1.00K 0.00K Thunderstorm Wind (70EG)Wind gusts estimated around 80 mph tore shingles off a house and broke large tree branches.Note: The estimated wind gust of 70 knots is equivalent to 81 mph.Crook County9 NNE Alva 12 1750MST 0 0 0.00K 0.00K Hail (1.00)Crook County9 NNE Alva 12 1750MST 0 0 0.00K 0.00K Thunderstorm Wind (52EG)Wind gusts were estimated at 60 mph.Note: The estimated wind gust of 52 knots is equivalent to 60 mph.Crook County6 SE Colony 12 1805MST 0 0 0.00K 0.00K Hail (1.25)Crook County6 SE Colony 12 1805MST 0 0 4.00K 0.00K Thunderstorm Wind (61EG)The combination of hail and wind broke windows of a house and automobile.A long-lived supercell thunderstorm developed across far northern Campbell County and tracked eastward across northernCrook County and eventually into western South Dakota. Large hail and strong wind gusts damaged automobiles and homes.Note: The estimated wind gust of 61 knots is equivalent to 70 mph.528

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010WYOMING, SoutheastNiobrara County8 ENE Lance Creek 03 1143MST1146MST 0 0 0.00K 0.00K Hail (1.00)Dime to quarter size hail and becoming heavier.Niobrara County11 N Hat Creek 03 1155MST1158MST 0 0 0.00K 0.00K Hail (1.00)During the late morning the environment in Niobrara county became destabilized from surface heating. Meanwhile an upperlevel disturbance moved over the area. There was enough moisture and shear available to support super cell thunderstormdevelopment.Platte County11 NW Wheatland 16 1500MST1520MST 0 0 0.00K 0.00K Heavy RainMeasured 1.00 inches of rainfall in 20 minutes.Platte County4 N Wheatland 16 1524MST1534MST 0 0 0.00K 0.00K Hail (1.00)Estimated wind gusts of up to 40 MPH also occurred.Platte County4 NNW Wheatland 16 1541MST1600MST 0 0 Heavy RainAccident at mile marker 83 on I-25. Heavy rain caused traffic to come to a halt. Estimated duration of event.Scattered thunderstorms developed during the late morning and early afternoon. While the environment was not especiallyconducive for severe thunderstorms, the combination of ample lift and shear allowed organized convection to form.LAKE ST. CLAIRLCZ460Lake St. Clair (US Portion)15 1429EST 0 0 0.00K 0.00K Marine Thunderstorm WindA thunderstorm moving into Lake St. Clair produced a 39 mph wind gust.19 1852EST 0 0 0.00K 0.00K Marine Thunderstorm WindA thunderstorm moving into Lake St. Clair produced a measured thunderstorm wind gust of 47 mph.GULF OF MEXICOGMZ730Apalachee Bay or Coastal Waters from Keaton Beach to Ochlockonee River FL out to 20nm01 1300EST 0 0 0.00K 0.00K WaterspoutA few thunderstorms moved offshore during the early afternoon hours and produced a few waterspouts.GULF OF MEXICOGMZ032Gulf Side of the Lower Keys out 20nm02 1404EST1420EST 0 0 0.00K 0.00K WaterspoutIsolated showers produced multiple waterspouts over Gulf of Mexico waters north of the Lower Florida Keys.529

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GULF OF MEXICOGMZ550-552 Coastal Waters From Southwest Pass Of The Mississippi River To Port Fourchon Louisiana Out 20 Nm -SW Pass of the Mississippi River to Atchafalaya River LA out 20nm03 0604CST0622CST 0 0 0.00K 0.00K WaterspoutThunderstorms produced several waterspouts over the Gulf of Mexico near the Lafourche and Terrebonne Parish coastlines.GULF OF MEXICOGMZ650Pensacola FL to Pascagoula MS out 20nm03 0802CST0804CST 0 0 0.00K 0.00K WaterspoutThe public reported a waterspout 3 miles south of Sand Island moving northeast.GULF OF MEXICOGMZ032Gulf Side of the Lower Keys out 20nm03 1335EST 0 0 0.00K 0.00K WaterspoutCumulus congestus cloud lines developed near the Lower Florida Keys, producing showers, thunderstorms and a couplewaterspouts.GULF OF MEXICOGMZ676Chokoloskee to Bonita Beach FL 20 to 60nm03 1530EST 0 0 0.00K 0.00K Marine Thunderstorm WindAfternoon storms along the southwest Florida coast produced strong wind gusts.GULF OF MEXICOGMZ830Tampa Bay03 1900EST 0 0 0.00K 0.00K Marine Thunderstorm Wind04 1749EST 0 0 0.00K 0.00K Marine Thunderstorm WindHigh pressure ridging across the area allowed for afternoon thunderstorms to develop along seabreeze boundaries. These stormspushed offshore in the evening and caused strong wind gusts over the coastal waters.GULF OF MEXICOGMZ750Apalachicola to Destin FL out 20nm04 1804EST 0 0 0.00K 0.00K WaterspoutA few thunderstorms moved offshore during the late afternoon and early evening hours and one produced a waterspout.GULF OF MEXICOGMZ530-532Lake Ponchartrain and Lake Maurepas - Mississippi Sound04 1806CST1918CST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong thunderstorms produced wind gusts near 40 knots over Lake Pontchartrain and over Mississippi Sound.GULF OF MEXICOGMZ452-455Atchafalaya River to Intracoastal City LA out 20nm - Intracoastal City LA to Cameron LA out 20nm05 0819CST0925CST 0 0 0.00K 0.00K WaterspoutStrong thunderstorms moving across the coastal waters south of the Louisiana coast produced several reports of waterspoutsduring the morning hours on August 5.530

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GULF OF MEXICOGMZ450Cameron LA to High Island TX out 20nm06 0837CST 0 0 0.00K 0.00K WaterspoutThunderstorms just offshore the southern Louisiana coast produced a waterspout south of Holly Beach.GULF OF MEXICOGMZ355High Island to Freeport TX out 20nm07 1530CST 0 0 0.00K 0.00K WaterspoutA newspaper report indicated two waterspouts were sighted near High Island.GULF OF MEXICOGMZ853Englewood to Tarpon Springs FL out 20nm08 1112EST1114EST 0 0 0.00K 0.00K WaterspoutA trough of low pressure was in place across the northern Florida peninsula. Very deep moisture was in place across the areaallowing numerous showers and thunderstorms to develop in the unstable atmosphere. Some storms produced a fewwaterspouts near the coast and some gusty marine winds.GULF OF MEXICOGMZ532Mississippi Sound08 1605CST 0 0 0.00K 0.00K WaterspoutA thunderstorm produced a waterspout over Mississippi Sound.GULF OF MEXICOGMZ032-033East Cape Sable to Chokoloskee 20 to 60nm - Gulf Side of the Lower Keys out 20nm09 0855EST0940EST 0 0 0.00K 0.00K WaterspoutA low pressure system over central Florida produced widespread showers and thunderstorms in the Florida Keys CoastalWaters. Waterspouts were observed well offshore Key West in the Gulf of Mexico.GULF OF MEXICOGMZ856Bonita Beach to Englewood FL out 20nm09 1131EST1132EST 0 0 0.00K 0.00K WaterspoutA trough of low pressure was in place across the northern Florida peninsula. Very deep moisture was in place across the areaallowing numerous showers and thunderstorms to develop in the unstable atmosphere. Some storms produced a fewwaterspouts near the coast and some gusty marine winds.GULF OF MEXICOGMZ435-455Atchafalaya River to Intracoastal City LA out 20nm - VERMILION BAY09 1634CST1725CST 0 0 0.00K 0.00K Marine Thunderstorm WindThunderstorms in the Gulf Waters near Marsh Island produced two reports of strong winds.531

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GULF OF MEXICOGMZ830Tampa Bay10 1427EST 0 0 0.00K 0.00K Marine Thunderstorm WindA trough of low pressure was in place across the northern Florida peninsula. Very deep moisture was in place across the areaallowing numerous showers and thunderstorms to develop in the unstable atmosphere. Some storms produced a fewwaterspouts near the coast and some gusty marine winds.GULF OF MEXICOGMZ452-470-472 Cameron LA to High Island TX 20 to 60nm - Intracoastal City LA to Cameron LA 20 to 60nm -Intracoastal City LA to Cameron LA out 20nm11 1750CST1855CST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong thunderstorms near the Louisiana coast produced several reports of strong winds at offshore oil rig platforms.12 0400CST 0 0 0.00K 0.00K Marine Thunderstorm Wind12 0615CST 0 0 0.00K 0.00K Marine Thunderstorm WindGMZ450GMZ430-450Cameron LA to High Island TX out 20nm12 0740CST 0 0 0.00K 0.00K Waterspout12 0850CST 0 0 0.00K 0.00K Marine Thunderstorm WindCameron LA to High Island TX out 20nm - Sabine Lake12 0854CST0905CST 0 0 0.00K 0.00K Marine Thunderstorm WindScattered strong thunderstorms affected the northwest Gulf of Mexico waters off the Texas and Louisiana coasts throughout themorning hours on August 12. Several reports of strong winds and a waterspout were received.GULF OF MEXICOGMZ530Lake Ponchartrain and Lake Maurepas14 1705CST 0 0 0.00K 0.00K Marine Thunderstorm WindA thunderstorm produced wind gusts over 40 knots on Lake Borgne.GULF OF MEXICOGMZ630Mobile Bay15 1507CST1509CST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong thunderstorms over the marine area produced high wind gusts.GULF OF MEXICOGMZ532Mississippi Sound15 1706CST 0 0 0.00K 0.00K Marine Thunderstorm WindA thunderstorm produced an isolated wind report near 40 knots over Mississippi Sound.GULF OF MEXICOGMZ430-450-452-455Atchafalaya River to Intracoastal City LA out 20nm - Cameron LA to High Island TX out 20nm -Intracoastal City LA to Cameron LA out 20nm - Sabine Lake16 0625CST1435CST 0 0 0.00K 0.00K Marine Thunderstorm WindA cluster of strong to severe thunderstorms that developed across south-central Louisiana moved southwest into the coastalwaters south of Louisiana during the morning hours on August 16, producing several reports of strong winds on offshore oil rigplatforms. Additional thunderstorms developed during the afternoon hours, causing several more reports of strong winds.532

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GULF OF MEXICOGMZ335Galveston Bay16 1448CST 0 0 0.00K 0.00K Marine Thunderstorm WindA southward moving squall line raced across the coastal waters in the afternoon and produced some strong marinethunderstorm wind gusts.GULF OF MEXICOGMZ475Atchafalaya River to Intracoastal City LA 20 to 60nm16 2255CST 0 0 0.00K 0.00K Marine Thunderstorm WindA cluster of strong to severe thunderstorms that developed across south-central Louisiana moved southwest into the coastalwaters south of Louisiana during the morning hours on August 16, producing several reports of strong winds on offshore oil rigplatforms. Additional thunderstorms developed during the afternoon hours, causing several more reports of strong winds.GMZ430Sabine Lake18 1618CST 0 0 0.00K 0.00K Marine Thunderstorm WindAs Tropical Depression 5 moved across Louisiana, strong thunderstorms rotating around the system produced strong windsover Sabine Lake.GULF OF MEXICOGMZ053GMZ032Craig Key to the West End of the 7 Mile Bridge out 20nm21 1920EST 0 0 0.00K 0.00K Marine Thunderstorm WindA line of thunderstorms moved southwest across the Middle Florida Keys, producing isolated gale-force wind gusts in thenearshore Atlantic waters.Gulf Side of the Lower Keys out 20nm22 0947EST 0 0 0.00K 0.00K WaterspoutA cluster of showers and thunderstorms just north of the Lower Florida Keys produced a waterspout.GMZ075Key West to Dry Tortugas Waters22 1352EST 0 0 0.00K 0.00K Marine Thunderstorm WindScattered thunderstorms developing in a favorable region between a large upper high pressure system and an upper leveldisturbance east of the Bahamas produced isolated gale-force wind gusts near Key West.GULF OF MEXICOGMZ532GMZ534Mississippi Sound22 1712CST 0 0 0.00K 0.00K Marine Thunderstorm WindLake Borgne22 1734CST 0 0 0.00K 0.00K WaterspoutGMZ534-550-552 Coastal Waters From Southwest Pass Of The Mississippi River To Port Fourchon Louisiana Out 20 Nm -Lake Borgne - SW Pass of the Mississippi River to Atchafalaya River LA out 20nm22 1740CST2018CST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong thunderstorms produced gusty winds and at least one waterspout during the evening hours.GULF OF MEXICOGMZ335Galveston Bay23 1854CST 0 0 Marine Thunderstorm WindSeveral thunderstorms that developed across the western half of Houston produced strong marine winds as they swept acrosswestern Galveston Bay.533

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GULF OF MEXICOGMZ830Tampa Bay24 1802EST1804EST 0 0 0.00K 0.00K Waterspout24 1826EST 0 0 0.00K 0.00K Marine Thunderstorm WindA surface trough was in place to the north of the area with an upper trough in place over the area. Numerous showers andthunderstorms developed each day in the very moist and unstable environment. West to southwesterly flow allowed for severalwaterspouts to develop near the coast and some thunderstorms produced strong gusty winds over the coastal waters.GULF OF MEXICOGMZ053-054Craig Key to the West End of the 7 Mile Bridge out 20nm - West End of the 7 Mile Bridge to Key West out20nm24 2246EST2330EST 0 0 0.00K 0.00K Marine Thunderstorm WindGMZ031Florida Bay25 0006EST 0 0 0.00K 0.00K Marine Thunderstorm WindA line of strong thunderstorms moved north from the Atlantic waters, crossing the Middle and Lower Florida Keys. Windgusts to gale force occurred across a greater-than 40 mile stretch of the Florida Keys.GULF OF MEXICOGMZ853Englewood to Tarpon Springs FL out 20nm25 1200EST1210EST 0 0 0.00K 0.00K WaterspoutA surface trough was in place to the north of the area with an upper trough in place over the area. Numerous showers andthunderstorms developed each day in the very moist and unstable environment. West to southwesterly flow allowed for severalwaterspouts to develop near the coast and some thunderstorms produced strong gusty winds over the coastal waters.GULF OF MEXICOGMZ656Chokoloskee to Bonita Beach FL out 20nm26 0215EST 0 0 0.00K 0.00K Marine Thunderstorm WindOvernight thunderstorms moved onshore the southwest Florida Gulf Coast, producing strong wind gusts.GULF OF MEXICOGMZ053Craig Key to the West End of the 7 Mile Bridge out 20nm26 0221EST 0 0 0.00K 0.00K Marine Thunderstorm WindA trough of low pressure over the eastern Gulf of Mexico produced numerous thunderstorms north of the Florida Keys.Outflow boundaries moved southeast across portions of the island chain.GULF OF MEXICOGMZ455-475Atchafalaya River to Intracoastal City LA 20 to 60nm - Atchafalaya River to Intracoastal City LA out20nm28 1525CST1755CST 0 0 0.00K 0.00K Marine Thunderstorm WindSeveral strong to severe thunderstorms developed off the Louisiana coast during the afternoon hours, with some of thesethunderstorms becoming long lived supercells. Numerous reports of very high winds were received from offshore oil rigplatforms.534

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010GULF OF MEXICOGMZ830Tampa Bay28 1815EST 0 0 0.00K 0.00K Marine Thunderstorm WindWeak high pressure was building back into the area. A warm and moist environment in place allowed for scattered afternoonthunderstorms to develop along seabreeze and outflow boundaries. Some thunderstorms contained strong gusty winds.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ651Deerfield Beach to Ocean Reef FL01 0805EST0806EST 0 0 0.00K 0.00K WaterspoutAMZ610Lake Okeechobee01 2030EST 0 0 0.00K 0.00K Marine Thunderstorm WindA low pressure trough over north Florida triggered evening thunderstorms over South Florida. Also, morning showers over theAtlantic produced at least two waterspouts.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ572Volusia-Brevard County Line To Sebastian Inlet 20-60nm02 0650EST 0 0 0.00K 0.00K Marine Thunderstorm WindA cluster of thunderstorms associated with a nocturnal, marine, mesoscale convective system produced an outflow boundarythat propagated westward toward shore. Wind gusts over 35 knots occurred as the boundary passed and were recorded by aNOAA buoy well offshore Port Canaveral.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ252Cape Fear to Little River Inlet NC out 20nm06 1235EST1237EST 0 0 Marine Thunderstorm WindA bowing line of thunderstorms produced strong winds at Sunset Beach.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ610Lake Okeechobee06 1853EST1900EST 0 0 0.00K 0.00K WaterspoutATLANTIC, Caribbean Sea and Tropical AtlanticA storm spotter reported a water spout on Lake Okeechobee.AMZ354Savannah GA to Altamaha Sound GA out 20nm06 2154EST2155EST 0 0 0.00K 0.00K Marine Thunderstorm WindWidespread surface heating and continued deep moisture advection ahead of an approaching cold front from the northwestallowed for very unstable atmospheric conditions with CAPE values between 3500 to 4000 J/kg Friday afternoon and evening.As a 500 mb shortwave tracked along the southern periphery of a broad through and across the region, severe thunderstormsdeveloped across the area. These severe storms tracked into the area from the Midlands during the evening and pushed all theway into portions of the Georgia and South Carolina coastal waters during the overnight hours.535

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ550Flagler Beach to Cocoa Beach FL out 20nm07 1209EST1210EST 0 0 0.00K 0.00K WaterspoutA waterspout formed over the intracoastal river then moved onshore the adjacent barrier island in New Smyrna Beach as a briefEF0 tornado. Several hours later, a strong thunderstorm moved offshore the Brevard County coast and produced gusty winds.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ610Lake Okeechobee07 1500EST 0 0 0.00K 0.00K Marine Thunderstorm WindAfternoon thunderstorms produced strong wind gusts on Lake Okeechobee in association with a southward-moving band ofmoisture across the Florida peninsula.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ552Volusia-Brevard County Line to Sebastian Inlet 0 to 20nm07 1512EST 0 0 0.00K 0.00K Marine Thunderstorm WindA waterspout formed over the intracoastal river then moved onshore the adjacent barrier island in New Smyrna Beach as a briefEF0 tornado. Several hours later, a strong thunderstorm moved offshore the Brevard County coast and produced gusty winds.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ610AMZ650Lake Okeechobee07 1515EST 0 0 0.00K 0.00K Marine Thunderstorm WindAfternoon thunderstorms produced strong wind gusts on Lake Okeechobee in association with a southward-moving band ofmoisture across the Florida peninsula.Jupiter Inlet to Deerfield Beach FL out 20nm07 1820EST1822EST 0 0 0.00K 0.00K WaterspoutA pilot spotted a waterspout.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ552Volusia-Brevard County Line to Sebastian Inlet 0 to 20nm08 1051EST 0 0 0.00K 0.00K Marine Thunderstorm WindNumerous clusters of strong thunderstorms developed over the central Florida interior and spread offshore the mainland andacross the intracoastal and nearshore coastal waters with wind gusts over 34 knots.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ610Lake Okeechobee08 1245EST 0 0 0.00K 0.00K Marine Thunderstorm WindHigh moisture and moisture convergence over South Florida led to another day of strong thunderstorms over the region.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ555Cocoa Beach to Jupiter Inlet FL out 20nm08 1308EST 0 0 0.00K 0.00K Marine Thunderstorm WindNumerous clusters of strong thunderstorms developed over the central Florida interior and spread offshore the mainland andacross the intracoastal and nearshore coastal waters with wind gusts over 34 knots.536

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ610Lake Okeechobee08 1330EST 0 0 0.00K 0.00K Marine Thunderstorm WindHigh moisture and moisture convergence over South Florida led to another day of strong thunderstorms over the region.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ550Flagler Beach to Cocoa Beach FL out 20nm11 1104EST1105EST 0 0 0.00K 0.00K WaterspoutAn isolated heavy shower developed near the Volusia County coast and moved inland to the intracoastal waterway. Awaterspout formed near the shower, then moved ashore the mainland as a tornado.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ651Deerfield Beach to Ocean Reef FL14 0843EST0845EST 0 0 0.00K 0.00K WaterspoutFair-weather waterspouts developed along a cloud line off Cape Florida.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ352Edisto Beach SC to Savannah GA out 20nm15 0700EST0701EST 0 0 0.00K 0.00K WaterspoutATLANTIC, Caribbean Sea and Tropical AtlanticDeep tropical moisture advected over Southeast Carolina as a result of the remnant low from former tropical depression 5. Highmoisture in combination with very weak winds from the surface up to 500 millibars lead to a favorable environment forwaterspouts during the morning hours.AMZ610Lake Okeechobee16 1700EST 0 0 0.00K 0.00K Marine Thunderstorm WindAnother day of high atmospheric moisture and sea breeze convergence led to thunderstorms over South Florida.AMZ630-651Biscayne Bay - Deerfield Beach to Ocean Reef FL21 1920EST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong afternoon and evening storms moving off the mainland caused strong wind gusts near the Miami-Dade County coast.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ555AMZ550Cocoa Beach to Jupiter Inlet FL out 20nm23 1231EST 0 0 0.00K 0.00K Marine Thunderstorm WindSeveral thunderstorms spread offshore the mainland and across the intracoastal waters and near shore Atlantic with gusty windsover 34 knots.Flagler Beach to Cocoa Beach FL out 20nm24 1055EST 0 0 0.00K 0.00K Marine Thunderstorm WindFast moving thunderstorms exited the mainland and crossed the intracoastal and nearshore coastal waters of Volusia, IndianRiver and St. Lucie counties, while producing gusts to 34 knots.537

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ250-254Little River Inlet NC to Murrells Inlet SC out 20nm - Surf City to Cape Fear NC out 20nm24 1225EST1245EST 0 0 0.00K 0.00K WaterspoutA waterspout was spotted near Wrightsville Beach.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ555Cocoa Beach to Jupiter Inlet FL out 20nm24 1351EST 0 0 0.00K 0.00K Marine Thunderstorm WindFast moving thunderstorms exited the mainland and crossed the intracoastal and nearshore coastal waters of Volusia, IndianRiver and St. Lucie counties, while producing gusts to 34 knots.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ350South Santee River to Edisto Beach SC out 20nm24 1704EST1708EST 0 0 0.00K 0.00K WaterspoutA line of thunderstorms developed over the coastal waters as several mid level shortwaves progressed through the region.Ample low level moisture in combination with weak wind fields from the surface through 700 millibars set up an environmentcapable of waterspouts as this line of thunderstorms passed near the Charleston harbor entrance.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ154AMZ135Cape Hatteras to Ocracoke Inlet NC out 20nm26 0915EST 0 0 0.00K 0.00K WaterspoutA water spout developed form a light shower just east of Hatteras Village.Pamlico Sound27 0730EST 0 0 0.00K 0.00K WaterspoutA water spout develop from a light shower just west of Ocracoke inlet.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ254Little River Inlet NC to Murrells Inlet SC out 20nm27 1345EST1355EST 0 0 0.00K 0.00K WaterspoutMultiple reports of a waterspout off the coast of Myrtle Beach.ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ350South Santee River to Edisto Beach SC out 20nm28 1110EST1117EST 0 0 0.00K 0.00K WaterspoutA weak coastal trough was present our Georgia coastal waters during the late morning hours. As this feature began to driftonshore, a small line of showers and thunderstorms developed over warm waters along the South Carolina coast. Ample lowlevel moisture and weak wind fields from the surface through 700 millibars set up an environment capable of waterspouts asthis small line of showers and thunderstorms passed near Folly Beach and Kiawah Island Beach.538

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ATLANTIC, Caribbean Sea and Tropical AtlanticAMZ651Deerfield Beach to Ocean Reef FL31 1449EST1451EST 0 0 0.00K 0.00K WaterspoutATLANTIC, North31 1505EST 0 0 0.00K 0.00K Marine Thunderstorm WindShowers moving rapidly towards the southeast Florida in a strong onshore wind pattern caused a waterspout along with strongwind gusts at the coast.ANZ530-536Chesapeake Bay North of Pooles Island MD - Tidal Potomac Indian Head to Cobb Island MD04 1930EST2100EST 0 0 Marine Thunderstorm WindHigh pressure over the Atlantic Ocean continued to pump in hot and humid air over the waters. A series of upper-leveldisturbances in the jet stream passed through the waters triggering showers and thunderstorms during this time. There wasenough instability from the hot and humid air for some thunderstorms to contain gusty winds.ATLANTIC, NorthANZ330Long Island Sound East of New Haven CT to Port Jefferson NY05 0745EST 0 0 Marine Thunderstorm WindAn approaching pre-frontal trough triggered an isolated strong thunderstorm, that impacted the waters of Eastern Long IslandSound, near the Southeast Connecticut Coast.ATLANTIC, NorthANZ232Nantucket Sound05 1105EST 0 0 0.00K 0.00K Marine Thunderstorm WindA cold front moved through the area producing thunderstorms and heavy rain across Southern New England.ATLANTIC, NorthANZ533>537-541-543Chesapeake Bay Drum Point to Smith Point VA - Chesapeake Bay North Beach to Drum Point MD -Choptank River To Cambridge Md And The Little Choptank River - Tangier Sound And The InlandWaters Surrounding Bloodsworth Island - Tidal Potomac Cobb Island MD to Smith Point VA - TidalPotomac Indian Head to Cobb Island MD - Tidal Potomac Key Bridge to Indian Head MD05 1436EST1635EST 0 0 Marine Thunderstorm WindA hot and humid air mass remained over the waters on the 5th. A series of upper-level disturbances in a zonal flow passedthrough the Mid-Atlantic during this time. Showers and thunderstorms developed during the afternoon and evening hours.There was enough instability from the hot and humid air mass for some thunderstorms to contain gusty winds.ATLANTIC, NorthANZ632Chesapeake Bay New Point Comfort to Cape Henry VA05 1639EST 0 0 0.00K 0.00K Marine Thunderstorm WindScattered thunderstorms well in advance of a cold front produced gusty winds across portions of the Chesapeake Bay andVirginia Coastal Waters.539

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ATLANTIC, NorthANZ537Tidal Potomac Cobb Island MD to Smith Point VA05 1648EST1700EST 0 0 Marine Thunderstorm WindA hot and humid air mass remained over the waters on the 5th. A series of upper-level disturbances in a zonal flow passedthrough the Mid-Atlantic during this time. Showers and thunderstorms developed during the afternoon and evening hours.There was enough instability from the hot and humid air mass for some thunderstorms to contain gusty winds.ATLANTIC, NorthANZ632Chesapeake Bay New Point Comfort to Cape Henry VA05 1654EST 0 0 0.00K 0.00K Marine Thunderstorm WindScattered thunderstorms well in advance of a cold front produced gusty winds across portions of the Chesapeake Bay andVirginia Coastal Waters.ATLANTIC, NorthANZ532-534-537-543Chesapeake Bay Drum Point to Smith Point VA - Chesapeake Bay Sandy Point to North Beach MD -Tangier Sound And The Inland Waters Surrounding Bloodsworth Island - Tidal Potomac Cobb IslandMD to Smith Point VA05 1701EST1708EST 0 0 Marine Thunderstorm WindA hot and humid air mass remained over the waters on the 5th. A series of upper-level disturbances in a zonal flow passedthrough the Mid-Atlantic during this time. Showers and thunderstorms developed during the afternoon and evening hours.There was enough instability from the hot and humid air mass for some thunderstorms to contain gusty winds.ATLANTIC, NorthANZ632-650-652Chesapeake Bay New Point Comfort to Cape Henry VA - Chincoteague to Parramore Island VA out 20nm- Fenwick Island DE to Chincoteague VA out 20nm05 1815EST1842EST 0 0 0.00K 0.00K Marine Thunderstorm WindIsolated thunderstorm well in advance of a cold front produced gusty winds across portions of the Maryland Coastal Waters.ATLANTIC, NorthANZ537Tidal Potomac Cobb Island MD to Smith Point VA05 1905EST 0 0 Marine Thunderstorm WindA hot and humid air mass remained over the waters on the 5th. A series of upper-level disturbances in a zonal flow passedthrough the Mid-Atlantic during this time. Showers and thunderstorms developed during the afternoon and evening hours.There was enough instability from the hot and humid air mass for some thunderstorms to contain gusty winds.ATLANTIC, NorthANZ631-656Cape Charles Light VA to NC-VA border out 20nm - Chesapeake Bay Windmill Point to New PointComfort VA05 1914EST1918EST 0 0 0.00K 0.00K Marine Thunderstorm WindScattered thunderstorms well in advance of a cold front produced gusty winds across portions of the Chesapeake Bay andVirginia Coastal Waters.ANZ658NC-VA border to Currituck Beach Light out 20nm11 1736EST 0 0 0.00K 0.00K Marine Thunderstorm WindIsolated thunderstorm in advance of a cold front produced gusty winds across portions of the North Carolina Coastal Waters.540

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ATLANTIC, NorthANZ532>535-538 Chesapeake Bay Drum Point to Smith Point VA - Chesapeake Bay North Beach to Drum Point MD -Chesapeake Bay Sandy Point to North Beach MD - Patapsco River Including Baltimore Harbor - TidalPotomac Key Bridge to Indian Head MD12 0619EST0810EST 0 0 Marine Thunderstorm WindANZ543Tangier Sound And The Inland Waters Surrounding Bloodsworth Island12 0915EST 0 0 1.0K WaterspoutA backdoor cold front stalled out near the waters on the 12th while and upper-level disturbance passed through the area. A hotand humid air mass ahead of the cold front produced moderate amounts of instability. Some thunderstorms that developed wereable to produce gusty winds.ATLANTIC, NorthANZ631Chesapeake Bay Windmill Point to New Point Comfort VA12 1030EST 0 0 0.00K 0.00K Marine Thunderstorm WindIsolated thunderstorm associated with a cold front produced gusty winds across portions of the Chesapeake Bay.ATLANTIC, NorthANZ537Tidal Potomac Cobb Island MD to Smith Point VA16 1512EST 0 0 Marine Thunderstorm WindA surface trough triggered some showers and thunderstorms over the waters. An isolated thunderstorm did produce damagingwinds due to moderate amounts of instability ahead of the trough.ATLANTIC, NorthANZ231-256Cape Code Bay - Coastal Waters From Montauk Ny To Marthas Vineyard Extending Out To 20 NmValues South Of Block Island17 0230EST0247EST 0 0 1.0K 0.00K Marine Thunderstorm WindA cold front swept across the coastal waters during the early morning hours, producing showers and thunderstorms over thewaters.ATLANTIC, NorthANZ452Little Egg Inlet to Great Egg Inlet NJ out 20nm17 1435EST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong thunderstorms developed along the sea breeze front in Atlantic County during the afternoon of the 17th.ATLANTIC, NorthANZ533Chesapeake Bay North Beach to Drum Point MD22 1550EST 0 0 Marine Thunderstorm WindA mid-level trough of low pressure combined with a hot and humid air mass to trigger showers and thunderstorms across thewaters. Some thunderstorms were able to produce gusty winds due to moderate amounts of instability from the air mass.ATLANTIC, NorthANZ232Nantucket Sound23 1000EST1141EST 0 0 0.00K 0.00K Marine Thunderstorm WindA low pressure moving south of Martha's Vineyard and Nantucket combined with a building high pressure over the Canadianmaritime provinces to produce a strong pressure gradient, resulting in strong winds across Southern New England.541

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010ATLANTIC, NorthANZ534Chesapeake Bay Drum Point to Smith Point VA28 0855EST0905EST 0 0 WaterspoutAn upper-level disturbance passed through the waters on the morning of the 28th triggering showers and thunderstorms. Therewas enough low-level spin for an isolated thunderstorm to produce a water spout over the middle portion of the Bay.LAKE HURONLHZ3475nm East of Mackinac Bridge to Presque Isle Light MI15 1204EST 0 0 0.00K 0.00K Marine Thunderstorm WindA thunderstorm brought strong winds to part of the Northeast Lower Michigan shoreline.LHZ348LHZ345-348Presque Island Light to Sturgeon Point MI16 2111EST 0 0 0.00K 0.00K Marine Thunderstorm WindOne thunderstorm produced strong winds over Northern Lake Huron.Presque Island Light to Sturgeon Point MI - Straits of Mackinac within 5nm of Mackinac Bridgeincluding Mackinac Island19 0324EST0547EST 0 0 0.00K 0.00K Marine Thunderstorm WindThunderstorms impacted Lake Huron, from the Straits of Mackinac to north of Alpena.LAKE MICHIGANLMZ741-744Gary to Burns Harbor in - Wilmette Harbor to Meigs Field IL04 0610CST0640CST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong to severe thunderstorms moved across parts of southern Lake Michigan during the morning hours of August 4th.LAKE MICHIGANLMZ043-046Michigan City in to New Buffalo MI - New Buffalo to St. Joseph MI04 0745EST0842EST 0 0 0.00K 0.00K Marine Thunderstorm WindA complex of thunderstorms moved from northern Illinois across southern Lake Michigan. Strong winds moved on shore fromthe lake, eventually causing damage inland.LAKE MICHIGANLMZ344-345Grand Traverse Light to Sleeping Bear Point MI - Sleeping Bear Point to Manistee MI08 0349EST0410EST 0 0 0.00K 0.00K Marine Thunderstorm WindThunderstorms brought strong winds to parts of Northwest Lower Michigan.542

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010LAKE MICHIGANLMZ745Burn Harbor to Michigan City In13 2110CST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong to severe thunderstorms moved across parts of southern Lake Michigan during the afternoon of August 13th.LAKE MICHIGANLMZ522-542Bay of Green Bay South of a line from Marinette to Fish Creek WI - Sturgeon Bay to Two Rivers WI20 1525CST1553CST 0 0 0.00K Marine Thunderstorm WindThunderstorms that produced damaging winds, hail, a tornado and torrential rainfall over the land moved offshore where theycontinued to produce strong winds.LAKE MICHIGANLMZ643Sheboygan to Point Washington WI20 1600CST 0 0 0.00K 0.00K Marine Thunderstorm WindA line of strong thunderstorms with a history of producing widespread damaging wind gusts over the land affected thenearshore waters of Lake Michigan north of Milwaukee.LAKE MICHIGANLMZ542-563Rock Island Passage to Sturgeon Bay WI 5nm Offshore to Mid Line of Lake - Sturgeon Bay to Two RiversWI20 1636CST1704CST 0 0 0.00K Marine Thunderstorm WindThunderstorms that produced damaging winds, hail, a tornado and torrential rainfall over the land moved offshore where theycontinued to produce strong winds.LAKE MICHIGANLMZ323-342-344>346-364Charlevoix To Point Betsie Mi 5nm Off Shore To Mid Lake - Grand Traverse Bay & Norwood to GrandTraverse Light MI - Grand Traverse Light to Sleeping Bear Point MI - Manistee to Point Betsi MI -Norwood MI to 5nm West of Mackinac Bridge - Sleeping Bear Point to Manistee MI20 1800EST1920EST 0 0 0.00K 0.00K Marine Thunderstorm WindSevere thunderstorms impacted parts of Northern Lake Michigan.LAKE SUPERIORLSZ145Duluth MN to Point Wing WI20 0317CST 0 0 0.00K 0.00K Marine Thunderstorm WindStrong wind gusts accompanied a thunderstorm over western Lake Superior.LAKE ONTARIOLOZ042Niagara River to Thirty Mile Point NY15 2325EST 0 0 0.00K Marine Thunderstorm WindA cold front crossed the western Great Lakes during the early overnight hours. A thunderstorm accompanying the frontproduced wind gusts measured to 35 knots at the Youngstown Coast Guard Station.543

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010VIRGIN ISLANDSVIZ001VIZ001-002St. Thomas/St. John and Adjacent Islands30 1011AST 0 0 30.0K 0.00K Strong WindSt. Croix - St. Thomas/St. John and Adjacent Islands30 1520AST1750AST 0 0 0.00K 0.00K Tropical StormOn August 22nd, a tropical disturbance emerged off the western African coast into the tropical Atlantic ocean. A surface lowdeveloped in association with the tropical disturbance, and thunderstorms became well-enough organized around the lowpressure area for the system to be declared a Tropical Depression Seven at 11 am AST on the 25th. Tracking just north of duewest, Earl became a tropical storm at 5 pm AST on the 25th, the fifth tropical storm of the season. By late afternoon on the26th Earl was becoming better organized as it continued moving westward over the Central Tropical Atlantic. At 5 pm on the28th, a tropical storm watch was issued for the U.S. Virgin Islands, Vieques and Culebra, around 48 hours before the expectedarrival of tropical storm force winds, and was upgraded to a Hurricane Watch at 11 pm, which also included mainland PuertoRico. Earl strengthened into a hurricane at 830 am on the 29th based on a report from the hurricane hunter aircraft. At 11 amon the 29th, a tropical storm warning was issued for the U.S. Virgin Islands, Vieques Culebra, and mainland Puerto Rico, ahurricane watch remained in effect. As of 5 pm on the 29th, Earl continued to strengthen and was heading for the northernmostLeeward Islands. By 2 am on the 30th Earl was passing north of Barbuda and its rainbands were approaching the VirginIslands. At 5 am, the hurricane warning was issued for the U.S. Virgin Islands, and was extended to Culebra and Vieques at 11am, when Earl became a major hurricane (Category 3) since its maximum sustained winds had increased to near 120 mph. Itwas then located around 95 miles east northeast of Saint Thomas, or about 165 miles east of San Juan. The eye of Earl passedjust north of the British Virgin Islands, and its closest point of approach to the U.S. Virgin islands was around 3 pm on the 30thwhen it was located about 60 miles northeast of Saint Thomas. By 5 pm Earl strengthened into a category 4 hurricane, withmaximum winds of around 135 mph while it was moving away from the Virgin Islands. The hurricane warning for the U.S.Virgin Islands, Vieques and Culebra was changed to a tropical storm warning, and the hurricane watch for mainland PuertoRico was discontinued but the island remained under a tropical storm warning. Earlâs closest point of approach to San Juanwas at 7 pm when it was located about 95 miles northeast of San Juan. The tropical storm warning was discontinued at 7 am onAug. 31 for both the U.S. Virgin Islands and Puerto Rico. The forecast called for Earl to impact the U.S. Virgin Islands withrainfall amounts of four to eight inches with isolated amounts of up to twelve inches over higher terrain. Recorded rainfallamounts for Aug. 30th at the Saint Thomas airport was 3.02 inches, and 1.91 inches at the Saint Croix Airport. No significantrains were recorded for Aug. 29 and or 31. The NWS Coop Station at Coral Bay Saint John recorded 2.42 inches for the 24hour period ending on the 30th. Downed trees were reported on Saint Thomas and Saint John, and a few on Saint Croix. Powerwas out over most of Saint Thomas and Saint John on Monday Aug 30th, and in pockets on Saint Croix. Four boats wentashore on Cruz Bay Saint John.On September 28, 2010 President Obama issued a major disaster declaration for U.S. VirginIslands to supplement the recovery from the effects of Hurricane Earl. The surface winds recorded by the FAA observationplatform at the Saint Thomas Airport measured a maximum sustained wind of 53 mph from the west southwest at 551 pm ASTon the 30th, with a gust of 69 mph from the west at 550 pm AST. The Saint Croix airport sensor measured a maximumsustained wind of 37 mph from the west at 156 pm AST on the 30th, and a wind gust of 49 mph from the west southwest at 320pm AST on the 30th. Other reports from non NWS sensors across the USVI like the UVI CAR ICOOS Weather Flow TwoBrother Site across the Pillsbury Sound northwest of Cruz Bay, recorded a hurricane force wind gust of 75 mph around midafternoon on the 30th.PUERTO RICOGuaynabo7 NW Guaynabo 10 1150AST1415AST 0 0 0.00K 0.00K FloodMartinez Nadal Avenue was reported flooded in the municipality of Guaynabo.Mayaguez3 SW Mayaguez 10 1353AST1630AST 0 0 0.00K 0.00K FloodRoad 2 with intersection with Los Corazones Avenue was reported flooded.Mayaguez3 SW Mayaguez 10 1401AST1630AST 0 0 0.00K 0.00K FloodRoad Doncella was reported flooded at Urb. Sultana in Mayaguez.544

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PUERTO RICOCeiba2 NW Ceiba 10 1500AST1600AST 1 0 0.00K 0.00K Flash FloodA flash flood fatality was reported in Las Tinajas river in Ceiba. USGS river Fajardo sensor recorded a crest of half a footbetween 238-253 pm. M21IWFajardo4 SW Fajardo 10 1902AST2145AST 0 0 0.00K 0.00K Flash FloodRunoff from heavy rainfall on the headwaters of the Fajardo river, caused the river overflow its banks, flooding Highway 3 atthe intersection with PR53.A moist southeast flow combined with daytime heating and a weak upper level trough to produce scattered to numerousshowers with strong thunderstorms across Puerto Rico.Penuelas2 W Penuelas 19 1422AST 0 0 5.00K 0.00K Thunderstorm Wind (35EG)Road 385 was reported impassable due to downed trees.Note: The estimated wind gust of 35 knots is equivalent to 40 mph.PenuelasPenuelas 19 1445AST1700AST 0 0 20.00K 0.00K FloodSeveral houses were reported flooded at Barrio Caracoles I in Penuelas.The combination of an upper low pressure close to the local area and strong daytime heating resulted in rapidly developingstrong to near severe thunderstorms over the southern part of Puerto Rico. Penuelas, Ponce, Juana Diaz and Guayanilla werethe most affected municipalities. A trained spotter in Penuelas reported 2.26 inches of rainfall during the event.BayamonBayamon 23 1400AST 0 0 20.00K 0.00K Flash FloodSeveral houses were flooded at Country Estates sector in Bayamon.Bayamon2 N Bayamon 23 1413AST1615AST 0 0 0.00K 0.00K Flash FloodA house was reported flooded at Urb. Magnolia Garden in Bayamon.Bayamon2 NNW Bayamon 23 1413AST1615AST 0 0 0.00K 0.00K Flash FloodCafeteria El Puentecito was reported flooded at Urb . Sierra Linda, Road 14 in Bayamon.Moisture associated with a tropical wave combined with strong daytime heating and good upper level dynamics, to producenumerous showers with strong thunderstorms which led to very heavy rain across some area of Puerto Rico, mainly inBayamon, Toa Alta, and Toa Baja.Guaynabo7 NW Guaynabo 30 1315AST2215AST 0 0 0.00K 0.00K Flash FloodMartinez Nadal Avenue was reported flooded near San Patricio Plaza shopping center.PRZ002Northeast30 1435AST 0 0 0.00K 0.00K Landslide545

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PUERTO RICOCidra4 SW Cidra 30 1600AST2315AST 0 0 0.00K 0.00K Flash FloodRoad PR7729 was reported flooded at Cidra.Manati3 N Manati 30 1600AST 0 0 0.00K 0.00K Flash FloodRoad 604 was reported flooded at Manati.Barceloneta1 E Barceloneta 30 1645AST1930AST 0 0 0.00K 0.00K FloodArecibo4 NNW Arecibo 3031Highway 666 was reported flooded in sector Cachete.2000AST0245AST 0 0 0.00K 0.00K FloodRoad 681, Km 9.0 was reported flooded in the municipality of Arecibo.Ciales2 SE Ciales 30312000AST0245AST 0 0 0.00K 0.00K FloodCiales2 SE Ciales 3031ManatiManati 3031Road 615, Km 4.0 was reported flooded at Ciales.2000AST0245AST 0 0 0.00K 0.00K FloodRoad 615, Km 4.0 was reported flooded at Ciales.2000AST0245AST 0 0 0.00K 0.00K FloodRoad 2, km 51 was reported flooded in the municipality of Manati.UtuadoUtuado 30312000AST0245AST 0 0 0.00K 0.00K FloodRoad 10 and road 123 were reported flooded in the municipality of Utuado.Vega AltaVega Alta 30312000AST0245AST 0 0 0.00K 0.00K FloodRoad 2, km 32.0 was reported flooded in the municipality of Vega Alta.FajardoFajardo 30312020AST0215AST 0 0 0.00K 0.00K FloodRoad 53 with the intersection with road 3 was reported flooded in the municipality of Fajardo.BarcelonetaBarceloneta 30312023AST0045AST 0 0 0.00K 0.00K FloodA lane of highway 2, at Km 61.0 was reported flooded.546

TimeLocal/Location Date StandardPathLength(Miles)PathWidth(Yards)Number ofPersonsKilled InjuredEstimatedDamageProperty CropsCharacter of StormAugust 2010PUERTO RICOSan JuanSan Juan 30312331AST0230AST 0 0 0.00K 0.00K FloodMinor flooding was reported at Barrio Obrero, Las Monjas sector and Loiza Avenues in Santurce.Utuado2 WSW Utuado 31 0030AST0230AST 0 0 0.00K 0.00K FloodRoad 10 with the intersection with road 123 was reported flooded in the municipality of Utuado.Manati3 W Manati 31 0032AST1830AST 0 0 0.00K 0.00K FloodRoad 666 with the intersection with road were reported flooded in the municipality of Manati.On August 22nd, a tropical disturbance emerged off the western African coast into the tropical Atlantic ocean. A surface lowdeveloped in association with the tropical disturbance, and thunderstorms became well-enough organized around the lowpressure area for the system to be declared a Tropical Depression Seven at 11 am AST on the 25th. Tracking just north of duewest, Earl became a tropical storm at 5 pm AST on the 25th, the fifth tropical storm of the season. By late afternoon on the26th Earl was becoming better organized as it continued moving westward over the Central Tropical Atlantic. At 5 pm on the28th, a tropical storm watch was issued for the U.S. Virgin Islands, Vieques and Culebra, around 48 hours before the expectedarrival of tropical storm force winds, and was upgraded to a Hurricane Watch at 11 pm, which also included mainland PuertoRico. Earl strengthened into a hurricane at 830 am on the 29th based on a report from the hurricane hunter aircraft. At 11 amon the 29th, a tropical storm warning was issued for the U.S. Virgin Islands, Vieques Culebra, and mainland Puerto Rico, ahurricane watch remained in effect. As of 5 pm on the 29th, Earl continued to strengthen and was heading for the northernmostLeeward Islands. By 2 am on the 30th Earl was passing north of Barbuda and its rainbands were approaching the VirginIslands. At 5 am, the hurricane warning was issued for the U.S. Virgin Islands, and was extended to Culebra and Vieques at 11am, when Earl became a major hurricane (Category 3) since its maximum sustained winds had increased to near 120 mph. Itwas then located around 95 miles east northeast of Saint Thomas, or about 165 miles east of San Juan. The eye of Earl passedjust north of the British Virgin Islands, and its closest point of approach to the U.S. Virgin islands was around 3 pm on the 30thwhen it was located about 60 miles northeast of Saint Thomas. By 5 pm Earl strengthened into a category 4 hurricane, withmaximum winds of around 135 mph while it was moving away from the Virgin Islands. The hurricane warning for the U.S.Virgin Islands, Vieques and Culebra was changed to a tropical storm warning, and the hurricane watch for mainland PuertoRico was discontinued but the island remained under a tropical storm warning. Earlâs closest point of approach to San Juanwas at 7 pm when it was located about 95 miles northeast of San Juan. The tropical storm warning was discontinued at 7 am onAug. 31 for both the U.S. Virgin Islands and Puerto Rico. Across Puerto Rico, the highest 24 hour rainfall amounts ending atmidnight on Aug 30th were recorded in Naguabo, 5.18 inches, and Orocovis, 5.04 inches. Elsewhere across the easterninterior, central interior, and north central, rainfall amounts varied from 3 to around 4 inches. Downed trees, and flooded roadswere reported in various sectors. The maximum sustained surface wind recorded at the Luis Munoz Marin airport was 33 mphfrom the west northwest at 814 pm on Aug. 30, with a peak gust of 45 mph from the west northwest at 332 pm.547

Reference Notes:Storm Data DisclosureStorm Data is an official publication of the National Oceanic and Atmospheric Administration (NOAA) whichdocuments the occurrence of storms and other significant weather phenomena having sufficient intensity to cause lossof life, injuries, significant property damage, and/or disruption to commerce. In addition, it is a partial record of othersignificant meteorological events, such as record maximum or minimum temperatures or precipitation that occurs inconnection with another event.Some of the information appearing in Storm Data may have been provided by or gathered from sources outside theNational Weather Service (NWS), such as the media, law enforcement and/or other government agencies, privatecompanies, individuals, etc. An effort is made to use the best available information, but because of time and resourceconstraints, information from these sources may be unverified by the NWS. Therefore, when using information fromStorm Data, customers should be cautious as the NWS does not guarantee the accuracy or validity of the information.Further, when it is apparent information appearing in Storm Data originated from a source outside the NationalWeather Service (frequently credit is provided), Storm Data customers requiring additional information should contactthat source directly. In most cases, NWS employees will not have the knowledge to respond to such requests. Incases of legal proceedings, under Department of Commerce regulations and/or rules of the court, NWS employees arenot legally obligated to provide written or verbal testimony.Fatality Codes: For events that include a fatality, there is a code containing the gender, age and fatality location atthe end of the event narrative.1 st -letter: Gender (M/F) / 2 nd -numbers: Age / 3 rd -letters: Fatality location (see table below)Example: M51IW – Male, 51 years of age, fatality occurred In Water.Fatality Location Abbreviations:BF Ball Field MH Mobile HomeBO Boating OT OtherBU Business OU Outside/Open AreasCA Camping PH Permanent HomeEQ Heavy Equipment/Construction SC SchoolGF Golfing TE TelephoneIW In Water UT Under TreeLS Long Span Roof VE VehicleList of Acronyms:NWS - National Weather ServiceNOAA - National Oceanic and Atmospheric AdministrationWCM - Warning Coordination Meteorologist – The meteorologist at each NWS Office responsible for…………………reporting severe weather eventsLST - Local Standard Time Storm Data attempts to always use “Standard Time”AST - Atlantic Standard TimeEST/EDT - Eastern Standard Time / Eastern Daylight TimeCST/CDT - Central Standard Time / Central Daylight TimeMST/MDT - Mountain Standard Time / Mountain Daylight Time……………………………………………………………………………………………………………………………………………………………………………………….._548…………………………………………………

PST/PDTAKSHST- Pacific Standard Time / Pacific Daylight Time- Alaska Standard Time- Hawaii Standard TimeOther Notes:An “Episode” is an entire storm system and can contain many different types of events.An “Event” is an individual type of storm event.When listing wind speed values under “Character of Storm”, i.e. High Wind (G81): The G indicates a “Gust” which isa peak 5-second averaged wind speed in Knots (kts). 1 kt. = 1.152 mph. This number can be either E (estimated) bydamage caused, or M (measured) by known calibrated anemometers. Examples: (M61) = measured 61 knots; (E75) =estimated at 75 knots.All wind speeds listed are estimated by NWS personnel by the amount and type of damage unless otherwise notedwith an “M” which represents an actual wind speed as measured by official NWS approved anemometer.When listing hail size under “Character of Storm”, ex. Hail (2.25), the hail size is given in inches and hundredths ofinches.When listing property and crop damage, the figures indicated are the best guess made by the NWS from the availablesources of information at the time of the printing.The fatalities, injuries, and damage amounts appearing in tropical cyclone events are attributed only to wind damageexperienced in the coastal counties/parishes listed. Other tropical cyclone related events such as tornadoes andflooding are listed within their separate event types.549

The Saffir-Simpson ScaleCategory One Hurricane:Winds 74-95 mph (64-82 kts or 119-153 kph). Storm surge generally 4-5 ft above normal. No real damage tobuilding structures. Damage primarily to unanchored mobile homes, shrubbery, and trees. Some damage to poorlyconstructed signs. Also, some coastal road flooding and minor pier damage.Category Two Hurricane:Winds 96-110 mph (83-95 kts or 154-177 kph). Storm surge generally 6-8 feet above normal. Some roofing material,door, and window damage of buildings. Considerable damage to shrubbery and trees with some trees blown down.Considerable damage to mobile homes, poorly constructed signs, and piers. Coastal and low-lying escape routes flood2-4 hours before arrival of the hurricane center. Small craft in unprotected anchorages break moorings.Category Three Hurricane:Winds 111-130 mph (96-113 kts or 178-209 kph). Storm surge generally 9-12 ft above normal. Some structuraldamage to small residences and utility buildings with a minor amount of curtainwall failures. Damage to shrubberyand trees with foliage blown off trees and large trees blown down. Mobile homes and poorly constructed signs aredestroyed. Low-lying escape routes are cut by rising water 3-5 hours before arrival of the hurricane center. Floodingnear the coast destroys smaller structures with larger structures damaged by battering of floating debris. Terraincontinuously lower than 5 ft above mean sea level may be flooded inland 8 miles (13 km) or more. Evacuation oflow-lying residences with several blocks of the shoreline may be required.Category Four Hurricane:Winds 131-155 mph (114-135 kts or 210-249 kph). Storm surge generally 13-18 ft above normal. More extensivecurtainwall failures with some complete roof structure failures on small residences. Shrubs, trees, and all signs areblown down. Complete destruction of mobile homes. Extensive damage to doors and windows. Low-lying escaperoutes may be cut by rising water 3-5 hours before arrival of the hurricane center. Major damage to lower floors ofstructures near the shore. Terrain lower than 10 ft above sea level may be flooded requiring massive evacuation ofresidential areas as far inland as 6 miles (10 km).Category Five Hurricane:Winds greater than 155 mph (135 kts or 249 kph). Storm surge generally greater than 18 ft above normal. Completeroof failure on many residences and industrial buildings. Some complete building failures with small utility buildingsblown over or away. All shrubs, trees, and signs blown down. Complete destruction of mobile homes. Severe andextensive window and door damage. Low-lying escape routes are cut by rising water 3-5 hours before arrival of thehurricane center. Major damage to lower floors of all structures located less than 15 ft above sea level and within 500yards of the shoreline. Massive evacuation of residential areas on low ground within 5-10 miles (8-16 km) of theshoreline may be required.550

EF-Scale Intensity Wind Speed(mph)The Enhanced Fujita ScaleTypical Damage (Suggested)EF0 Gale Tornado 40 - 72 Tree branches broken, chimneys damaged, shallow-rootedtrees pushed over; sign boards damaged or destroyed,outbuildings and sheds destroyed.EF1 Moderate 73 - 112 Roof surfaces peeled off, mobile homes pushed offfoundations or overturned, moving autos pushed off theroads, garages may be destroyed.EF2 Significant 113 - 157 Roofs blown off frame houses; mobile homes demolishedand/or destroyed, train boxcars pushed over; large treessnapped or uprooted; airborne debris can cause damage.EF3 Severe 158 - 206 Roofs and walls torn off well constructed houses; trainsoverturned; large trees uprooted, can knock down entireforest of trees.EF4 Devastating 207 - 260 Well-constructed frame houses leveled; structures with weakfoundations blown off some distance; automobiles thrown,large airborne objects can cause significant damage.EF5 Incredible 261 - 318 Brick, stone and cinder-block buildings destroyed, mostdebris is carried away by tornadic winds, large and heavyobjects can be hurled in excess of 100 meters, treesdebarked, asphalt peeled off of roads, steel reinforcedconcrete structures badly damaged.EF6 Inconceivable 319 - 379 Brick, stone and cinderblock buildings destroyed, mostdebris is carried away by tornadic winds, large and heavyobjects can be hurled in excess of 100 meters, treesdebarked, asphalt peeled off of roads, steel reinforcedconcrete structures badly damaged.Typical EF0 Tornado DamageNote the trees are stripped of leaves, but thetrees remain standing. Only light roofdamage and a few missing shingles.Typical EF1 Tornado DamageNote the uprooted trees and missing shinglesfrom the roof. There is significant roofdamage.

Typical EF2 Tornado DamageThis home is missing it’s entire roof but theexterior walls remain intact. Some of thestronger hardwood trees remain standing.Typical EF3 Tornado DamageThis home is missing the entire roof as well assome of the exterior walls. Trees are blownover or snapped near the base andoutbuildings are destroyed.Typical EF4 Tornado DamageThis home is almost completely obliterated,with no walls standing. The debris from thehome is where the house once stood.Typical EF5 Tornado DamageThese homes have been completely removedfrom their original locations. The debrisfield has been scattered some distance fromtheir foundation.Typical EF5 Tornado DamageThe asphalt surface has been peeled off ofthis road.(All photographs courtesy of Brian Smith, Meteorologist,National Weather Service, Valley NE.)

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