Storm Data and Unusual Weather Phenomena - CIG

VIRGINIA, NorthCulpeper CountyCountywideStorm Data and Unusual Weather PhenomenaTimePath PathNumber ofEstimatedLocal/ Length WidthPersonsDamageLocation DateStandard (Miles) (Yards) Killed Injured Property Crops Character of StormMarch 199820 2200EST0 0 8KFlood21 0500ESTAn area of deep low pressure over the southeastern U.S. moved slowly into the southern middle Atlantic region over a 24-hourperiod, then off the coast by evening of the 21st. The low, which entrained deep moisture from the Gulf of Mexico, aided indumping storm total rainfall of 1 1/2 to 2 inches in the piedmont, with 2 to 3 inches in the Shenandoah Mountains and the BlueRidge. The rain, falling onto saturated soil during a winter of wet weather, produced widespread small stream and creek floodingwhich closed over 100 roads in northern and central Virginia.A portion of one of these roads, federal highway 50 in Frederick Co, was closed by a rock and mud slide near Gore. Road closures,mostly secondary, included 23 in Culpeper Co, 13 in Orange Co, 11 each in Madison and Shenandoah Co, and 10 in Clarke Co.Water was reported up to car windows in Monterey (Highland Co). A water rescue was necessary at Snickersville Gap (LoudounCo) when a vehicle became stranded early on the 21st.Minor river flooding (Rappahannock River) in southern Stafford Co occurred later that weekend; in all, portions of River Road wereclosed an estimated 20 percent of the time from January 1 through March 31, 1998. Closures were much more frequent in 1998then for the same period in 1997.VAZ057VAZ025>031-036>042-050>057King George22 0800EST0 0 150KRock SlideA portion of local route 627 slid down a cliff overlooking the Rappahannock River in southeastern King George Co. At least 1/2 thewidth of the road was removed. The rock slide, which occurred during benign weather, was partly due to repeated heavy rains, verymoist soil, and minor flooding along the river during the winter of 1997/98. Major river and flash flood events in 1996 likely set thestage, over the long term, for the slide.Augusta - Rockingham - Shenandoah - Frederick - Page - Warren - Clarke - Nelson - Albemarle - Greene -Madison - Rappahannock - Fauquier - Loudoun - Orange - Culpeper - Prince William - Fairfax - Arlington -Stafford - Spotsylvania - King George27 1500EST0 0Unseasonably Warm31 1800ESTAfter a winter of cloudy, wet conditions, spring struck back with a vengeance in the form of strong atmospheric high pressure.Underneath the high, very warm and dry conditions developed - more like early June than late March. Three record hightemperatures were set at IAD (VAZ042); on the 27th, 29th, and 31st, with readings of 84, 86, and 85 degrees, respectively.Temperatures in the central and northern Shenandoah Valley were the highest in 50 years for a similar time period. In Winchester(VAZ028), the maximum temperature of 86 degrees on the 29th was the highest on the date since 1948 (when the mercury reached88 degrees). The dry and breezy conditions aided several small brush fires throughout the piedmont, but no major unplanned burnswere noted.VIRGINIA, NorthwestVAZ003>004VAZ003>004VAZ003>004VIRGINIA, SouthwestHalifax CountyScottsburgDickenson - Buchanan10130600EST0900EST0 0ColdThis March cold snap was the coldest of the 97-98 winter for many communities in far western Virginia. Afternoon hightemperatures were in the 20s. The morning low readings were mostly 10 to 15 degrees.Dickenson - Buchanan16 0000EST0700EST0 0SnowSnow accumulations of 3 to 4 inches were common.Dickenson - Buchanan26 1200EST0 0Record Warmth31 2100ESTA prolong period of early spring heat caused afternoon temperatures in the 80s for the river valleys, with 70s across the mountains.The warmest temperatures occurred on the 30th, with Grundy reporting 88 degrees.190540EST0930EST00Flash Flood169 163