A severe thunderstorm produced wind damage to a barn in Campbell County during the evening of May 21st.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS RNK wrote it up.
A severe thunderstorm produced wind damage to a barn in Campbell County during the evening of May 21st.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Blacksburg, VA wrote its last area forecast discussion before the first event at May 21, 6:26 PM EST, 19 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BLACKSBURG VA 726 PM EDT MON MAY 21 2007 .SYNOPSIS... A DIFFUSE COLD COLD FRONT WILL PUSH SLOWLY SOUTHWESTERWARD ACROSS VIRGINIA AND NORTHWEST NORTH CAROLINA THROUGH WEDNESDAY...AS HIGH PRESSURE BUILDS DOWN THE ATLANTIC COAST BY THURSDAY. THE HIGH PRESSURE WILL DOMINATE THE MID ATLANTIC REGION THROUGH MOST OF THE WEEKEND. && .NEAR TERM /THROUGH TUESDAY/... WEAK BACK DOOR COOL FRONT HAS PUSHED SOUTHWEST THROUGH THE EXTREME NORTHEASTERN PORTION OF THE BLACKSBURG FORECAST AREA...AND WILL CONTINUE TO PUSH SLOWLY SOUTHWEST THROUGH THE REST OF THE AREA OVERNIGHT BEFORE BECOMING QUASI-STATIONARY AND DIFFUSE JUST WEST AND SOUTH OF THE AREA ON TUESDAY. ATMOSPHERE ALONG AND AHEAD OF THE FRONTAL BOUNDARY REMAINS QUITE DRY...WITH ONLY MARGINAL INSTABILITY. WEAK SURFACE CONFLUENCE IN THE VICINITY OF THE BOUNDARY COUPLED WITH SOME SLIGHT MOISTURE POOLING MAY BE SUFFICIENT FOR THE DEVELOPMENT OF AN ISOLATED OR WIDELY SCATTERED DIURNALLY DRIVEN THUNDERSHOWER LATER THIS AFTERNOON INTO THIS EVENING. THIS ALREADY WELL REFLECTED IN THE GRIDS AND DO NOT PLAN ON MAKING ANY CHANGES TO REFLECTION IN TIME OR SPACE AT THIS TIME. WITH LIMITED CHANGE TO AIRMASS...EXPECT TO SEE OVERNIGHT LOW TEMPERATURES COMPARABLE TO THOSE OF LAST NIGHT...WITH LOWS RANGING FROM THE UPPER 40S TO LOWER 50S ALONG AND WEST OF THE BLUE RIDGE...TO THE MID 50S ACROSS THE PIEDMONT. && .SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/... SHORT RANGE ENSEMBLE FCST MEMBERS IN GOOD AGREEMENT THAT SURFACE BOUNDARY WILL REMAIN OVER SOUTHWEST HALF OF THE FCST AREA DURING THE DAY TUESDAY...IN GENERALLY VICINITY OF I-77 CORRIDOR. NAM HAS BEEN TOO HIGH WITH SF DEW PTS AND THUS FEEL THAT IS TOO AGREESIVE WITH INSTABILITY AND QPF OVER NW NC ON TUES. NEVERTHELESS...THE SIGNAL IN THE MODELS IS FOR SLIGHT MORE INSTABILITY COMPARED TO TODAY...ESPECIALLY IN VICINITY OFR BOUNDARY AND PERHAPS JUST TO THE SW OF BOUNDARY INTO NW NC MTNS. IN ADDITION...FLOW TURNING TO SOUTHEAST FLOW AT 850MB WILL ENHANCE UPSLOPE LIFT ALONG BLUE RIDGE...SO FEEL THERE IS A LITTLE BETTER CHC FOR SCT SHWRS AND TSTORMS BY MID TO LATE AFT FROM NEAR FLOYD SOUTHWESTWARD...AND EXTENDING OUT INTO FOOTHILLS. GOING FCST ALREADY HAD LOW CHC POPS ACROSS HE SW THIRD OF THE FCST AREA...AND REALLY THE ONLY CHANGE WAS TO PULL BACK ON POPS OVER THE DOWNLOPE AREAS...SPECIFICALLY FROM TAZEWELL UP INTO SE WV. MAV POP NUMBERS ARE SURPRISINGLY LOW IN THIS REGION BUT FEEL CONFIDNET THERE WILL BE SOME SCT ACTIVITY...EVEN IF IN A SMALL AREA. BY WED THE BOUNDARY PUSHES WEST TO THE WESTERN SLOPES OF THE APPALACHIANS BUT PUSHING THE THETA-E RDG TO OUR WEST...BUT LINGERING WEAK LOW-LEVEL CONVERGENCE MAY BE JUST ENOUGH TO ALLOW A FEW ISOLATED STORMS TO FIRE OVER HIGHER ELEVATIONS FROM NW NC TO NW GREENBRIER IN WV. THEN ON THURSDAY AS SFC RDG REALLY PUSHES IN FROM OFF THE VA COAST DRIER AIR WITH SUBSIDENCE WILL BE IN PLACE ACROSS ENTIRE AREA. MAV TEMPS LOOK REASONABLE WITH SOME OF THE WARMER TEMPS IN SW VA CORNERS WITH WARMER 850 TEMPS AND DOWNSLOPE...WITH COOLEST TEMPS TO INFILTRATE THE REGION WITH THE SFC HIGH WED AND THURS...BUT NOT SIGNIFICANTLY COOLER THAN LAST COUPLE OF DAYS. MADE SMALL ADJUSTMENTS TO LOCATIONS WITH TYPICALLY BIASES SUCH AS WARMING HIGHS IN GREENBRIER VALLEY AND WARMING LOWS IN ROANOKE VALLEY. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... LONG RANGE MODELS IN GOOD AGREEMENT THAT RIDGE WILL HOLD STRONG THROUGH MOST OF THE PERIOD. ECMWF A LITTLE FASTER AND DEEPER THAN GFS WITH SHORT WAVE MVG THROUGH GREAT LAKES REGION BY LATE SUNDAY INTO MONDAY...AND THIS TRIES TO DRAG A WEAK FRONT INTO THE SFC RIDGE AND THE WESTERN SLOPES OF THE APPALACHIANS BY MONDAY. TEND TO PREFER THE SLOWER SOLN GIVEN STRENGTH OF RDG BUT GIVEN THE CLIMATOLOGY OF THIS TIME OF YEAR AND INCREASING EVAPOTRANSPIRATION IT IS WORTH TRENDING TOWARD THE CLIMATOLOGICAL 30 CHC FOR SHWRS AND THUNDERSTORMS BY THE END OF THE WKND. AFTER ALL IT IS MEMORIAL DAY. SLOWLY RISING TEMPERATURE TREND DURING THE PERIOD AS WELL TO VALUES 5-7 DEG ABOVE NORMAL FOR MOST OF THE WEEKEND...THEN A SLIGHT DROP BACK MONDAY GIVEN THE DECISION TO GO WITH BETTER CHC FOR SHWRS AND MORE CLOUD COVER. && .AVIATION /00Z TUESDAY THROUGH SATURDAY/... BRIEF PERIOD OF MVFR VISIBILITY POSSIBLE AROUND DAYBREAK TUESDAY AND WEDNESDAY ACROSS PIEDMONT TERMINAL FORECAST POINTS...OTHERWISE VFR CONDITIONS EXPECTED AT ALL BLACKSBURG TERMINAL FORECAST POINTS FOR THE REST OF THE WEEK. WEAK BACK DOOR COOL FRONT WILL PUSH SLOWLY SOUTHWEST THROUGH THE BLACKSBURG TERMINAL FORECAST POINTS DURING THE NEXT 24 HOURS BEFORE BECOMING NEARLY STATIONARY AND DIFFUSE JUST WEST AND SOUTH OF THE AREA ON TUESDAY. ATMOSPHERE ALONG AND AHEAD OF THE FRONTAL BOUNDARY REMAINS QUITE DRY...WITH ONLY MARGINAL INSTABILITY. WEAK SURFACE CONFLUENCE IN THE VICINITY OF THE BOUNDARY COUPLED WITH SOME SLIGHT MOISTURE POOLING MAY BE SUFFICIENT FOR THE DEVELOPMENT OF AN ISOLATED OR WIDELY SCATTERED DIURNALLY DRIVEN THUNDERSHOWER THIS EVENING...BUT THREAT TO ANY TERMINAL FORECAST SITE APPEARS TO BE TOO MINIMAL TO INCLUDE IN THE TERMINAL FORECAST FORECAST. THREAT OF MAINLY AFTERNOON OR EARLY NIGHTTIME ISOLATED-WIDELY SCATTERED SHOWERS/THUNDERSTORMS WILL CONTINUE INTO TUESDAY...MAINLY ACROSS SOUTHWESTERN SECTIONS OF THE BLACKSBURG FORECAST AREA WHICH WILL REMAIN CLOSEST TO THE DECAYING FRONTAL BOUNDARY AND WHERE WEAK UP SLOPING WILL BE MAXIMIZED. ONCE AGAIN...MOST OF THE ACTIVITY SHOULD REMAIN SOUTH/WEST OF BLACKSBURG TERMINAL FORECASTS POINTS AND THEREFORE WILL NOT BE INCLUDED IN LATER PORTION OF UPCOMING 24 HOUR FORECAST. MOST OF THE REST OF THE WEEK APPEARS TO BE DRY AT THE PRESENT TIME AS UPPER AND SURFACE RIDGE BUILDS OVER AREA. INCREASING CAPPING SUBSIDENCE INVERSION BUILDING OVER AREA AND ASSOCIATED LIGHT SURFACE WINDS DURING NIGHTTIME PERIODS MAY BE SUFFICIENT TO TRAP LOW LEVEL INFUSION OF MOISTURE FROM EVAPOTRANSPIRATION PROCESS...RESULTING IN BRIEF REDUCTIONS OF VISIBILITY DOWN TO MVFR LEVELS DUE TO LIGHT FOG/HAZE WITHIN AN HOUR OR TWO OF SUNRISE. BEST CHANCE FOR BRIEF REDUCTIONS WILL BE ACROSS THE PIEDMONT...WITH LOWER THREAT WEST OF THE BLUE RIDGE DUE TO DRYING INFLUENCE OF WEAK DOWNSLOPING WIND. OTHERWISE...DO NOT SEE ANY SIGNIFICANT WEATHER THREAT TO AVIATION INTERESTS FOR THE BETTER PART OF THE NEXT 5-7 DAYS. && .RNK WATCHES/WARNINGS/ADVISORIES... VA...NONE. NC...NONE. WV...NONE. && SYNOPSIS...SK NEAR TERM...WERT SHORT TERM...SK LONG TERM...SK AVIATION...WERT
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BLACKSBURG VA 525 AM EDT MON MAY 21 2007 NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059- WVZ042>045-220930- ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES- YADKIN-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON- CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE- PATRICK-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL- APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-MERCER-SUMMERS-MONROE- GREENBRIER- 525 AM EDT MON MAY 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH CAROLINA...NORTHWEST NORTH CAROLINA...CENTRAL VIRGINIA...SOUTH CENTRAL VIRGINIA...SOUTHWEST VIRGINIA...WEST CENTRAL VIRGINIA AND SOUTHEAST WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The Roanoke radar (KFCX), 116 km away, was scanning. The volume nearest the first event began at 23:43 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds blew the roof off a 60 by 100 foot barn.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Virginia in 2007Every state in 2007This day in weather historyWarnings in Virginia, May 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 34017.