Storm Data and Unusual Weather Phenomena - CIG

NEW HAMPSHIRE, North and CentralNHZ004>006 Northern Carroll - Southern Grafton - Southern CarrollNHZ001>010NHZ001>010-013>014Grafton CountyCountywideCoos CountyCountywideCarroll CountyCountywideNHZ001>00514 0900EST1700EST00Heavy SnowAn intense area of low pressure moving eastward from the Great Lakes brought heavy snow to parts of central New Hampshire.Elsewhere in the state, a moderate snowfall occurred. Snowfall amounts ranged from an inch or less in the Connecticut RiverValley up to 10 inches in some of the higher terrain of central New Hampshire.Northern Coos - Southern Coos - Northern Grafton - Northern Carroll - Southern Grafton - SouthernCarroll - Sullivan - Merrimack - Belknap - Strafford21 1800EST0 0Heavy Snow22 1800ESTLow pressure moving slowly northeastward from the mid-Atlantic Coast brought heavy snow to much of the state with mixedprecipitation in southeastern parts of the state. Snowfall amounts ranged from 6 to 12 inches from Merrimack and SullivanCounties northward with lesser amounts in southeastern areas. Along the immediate coast, little, if any, snow accumulated.Northern Coos - Southern Coos - Northern Grafton - Northern Carroll - Southern Grafton - SouthernCarroll - Sullivan - Merrimack - Belknap - Strafford - Interior Rockingham - Coastal Rockingham27 1200EST0 0Record Warmth31 1900ESTA west to southwesterly flow of unseasonably mild air brought record or near-record warmth to New Hampshire during the last fivedays of the month. In Concord, each of the last five days were above 70 degrees with daily record high temperatures being set onthe 27th (76), 28th (86), and 31st (89). The high temperature of 89 on the 31st set a new record for the month of March. A coldfront dropping down from the north brought an end to the unseasonable warmth late on the 31st.29313031NEW HAMPSHIRE, SouthernNHZ012NHZ012NHZ011Storm Data and Unusual Weather PhenomenaTimePath PathNumber ofEstimatedLocal/ Length WidthPersonsDamageLocation DateStandard (Miles) (Yards) Killed Injured Property Crops Character of Storm1500EST2359EST0600EST2359EST0031 1900EST0 0Flood2359ESTRapid snowmelt due to record breaking high temperatures combined with rainfall to cause river flooding on the Connecticut andAndroscoggin Rivers and tributaries and the Saco River. Many homes were flooded and schools were closed in the affected areas.Northern Coos - Southern Coos - Northern Grafton - Northern Carroll - Southern Grafton29 1530EST0 0Flood31 2359ESTRecord warmth and rapid snowmelt caused rivers in northern New Hampshire to flood from late March through early April. Thesnowmelt combined with a line of thunderstorms that produced 1.5 to 2 inches of rain on the evening of the 30th resulted in recordor near record flows on the upper Connecticut River, and on the Androscoggin and Swift Rivers. The Connecticut reached a crestof 15.63 feet at 1745 at North Stratford on the 31st (13 ft. flood stage) and a crest at West Lebanon of 19.02 feet on the 29th(18 ftflood stage). Additional crests were reached in early April. The Saco River crested at Conway at 9.54 feet late on the 31st (9 ft.flood stage) .Hillsborough08 1900EST09 0000ESTHillsborough10 0700EST000000FloodFloodHeavy Rain13 1200ESTA powerful storm system moving slowly northeast from the Ohio Valley to the eastern Great Lakes brought strong winds and heavyrainfall to New Hampshire, resulting in urban street flooding, basement flooding, and some minor river flooding. The PiscataquogRiver at Goffstown reached flood stage of 9 feet at 7 AM on March 10th and crested at 9.1 feet at 10:30 AM on the 10th, then fellback below flood stage at noon on March 13th. Rainfall totals generally were in the 2 to 3 inch range. Some totals included: Hollis,3.10"; Nashua, 2.72"; Manchester, 2.48"; and Weare, 2.31".Cheshire22 0000EST1000EST0 0Heavy SnowA strong early Spring nor'easter was caused by a low pressure system which moved to the north-northeast from the Virginia coast onMarch 21st passing to the southeast of Cape Cod on March 22nd. This storm brought 3 to 5 inches of snow to southern NewHampshire. However, heavy snow was reported across northern Cheshire County, with totals of 6 to 8 inches in that area.FloodMarch 1998113 107