Alert archive / Virginia / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 19, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at May 12, 2005, 6:31 PM EDT for Halifax County, Virginia. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 12, 2005, 6:31 PM EDT (22:31 UTC)
- Expired
- May 12, 2005, 7:01 PM EDT
- In force
- 30 min
- Issued by
- NWS Blacksburg, VA
- Area
- Counties, with a storm outline in the text
County Halifax County, VA
The radar
The Roanoke radar (KFCX), 115 km from the middle of the area, began a volume at 22:33 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 10.5 hours before the alert went out and 55 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 72 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 1333 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KRNK 122232 SVRRNK VAC083-122300- /O.NEW.KRNK.SV.W.0019.050512T2231Z-050512T2300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BLACKSBURG VA 631 PM EDT THU MAY 12 2005 THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN HALIFAX COUNTY IN SOUTH CENTRAL VIRGINIA * UNTIL 700 PM EDT * AT 628 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 3 MILES NORTHWEST OF LEDA...OR ABOUT 4 MILES EAST OF MT AIRY...AND MOVING EAST AT 15 MPH. * LOCATIONS IMPACTED INCLUDE... LEDA... NATHALIE... IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. PLEASE SEND YOUR REPORTS OF PENNY OR LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...1...8 6 6...2 1 5...4 3 2 4. LAT...LON 3703 7909 3684 7914 3676 7885 3696 7877 $$ WP
2 follow-up statements
000 WWUS51 KRNK 122249 SVSRNK SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BLACKSBURG VA 649 PM EDT THU MAY 12 2005 VAC083-122300- /O.CON.KRNK.SV.W.0019.000000T0000Z-050512T2300Z/ HALIFAX VA- 649 PM EDT THU MAY 12 2005 ...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 700 PM EDT FOR HALIFAX COUNTY... AT 646 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR CRYSTAL HILL...OR ABOUT 6 MILES NORTHWEST OF HALIFAX... MOVING SOUTHEAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4. IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL... DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. LAT...LON 3700 7909 3681 7914 3673 7885 3693 7877 $$ WP
000 WWUS51 KRNK 122301 SVSRNK SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BLACKSBURG VA 701 PM EDT THU MAY 12 2005 VAC083-122311- /O.EXP.KRNK.SV.W.0019.000000T0000Z-050512T2300Z/ HALIFAX VA- 701 PM EDT THU MAY 12 2005 ...THE SEVERE THUNDERSTORM WARNING FOR HALIFAX COUNTY EXPIRED AT 700 PM EDT... TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4. LAT...LON 3700 7909 3681 7914 3673 7885 3693 7877 $$ WP
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at May 12, 3:28 PM EDT, 3 hours 3 minutes earlier.
Area forecast discussion, May 12, 3:28 PM EDT, 3 hours 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BLACKSBURG VA 328 PM EDT THU MAY 12 2005 .SHORT TERM (TONIGHT THROUGH FRIDAY)... SFC FRONT WORKING ITS WAY THRU THE AREA THIS AFTN AND WILL MAKE MORE PROGRESS TO THE SOUTH ONCE THE SUN GOES DOWN. PWATS/THETA-E/CAPES RUNNING HIGH WITH LITTLE STORM MOTION...THEREFORE STORMS WILL MOVE SLOW AND POSSIBLY PRODUCE LOCALIZED HEAVY DOWNPOURS THRU THIS EVENING. BY FRIDAY MORNING...FRONT SHOULD CLEAR THE AREA ENDING ALL PCPN. FRONT/S WESTERN PROGRESS NOT TO STRONG AND COULD ERODE TOWARDS THE MTN EMPIRE TMR AFTN. WITH BOUNDARY IN THAT AREA...WILL KEEP LOW CHC POPS FOR TSRA. LOW CLOUDS WILL KEEP THE SUN AWAY FOR A FEW DAYS ALONG AND EAST OF THE BLUE RIDGE. BIG CHANGE IN STORE FOR MOST AREAS AS TEMPS FALL BELOW NORMAL AND WILL LIKELY REMAIN IN THE 60S TMR. && .LONG TERM (FRIDAY NIGHT THROUGH THURSDAY)... FRIDAY NIGHT-SATURDAY... COLD FRONT MOVING THRU THE MS VALLEY WITH SFC WAVE MOVING THRU THE GREAT LAKES AND INTO THE OH VALLEY. 12Z GFS PROJECTING SFC WAVE SLOWER AND FARTHER NORTH THAN PREVIOUS RUN. THIS WILL ADVERSELY EFFECT THE EROSION OF THE WEDGE. WEDGE TO BEGIN ERODING ACROSS THE SW CWA (MTN EMPIRE/BLF) LATE FRI AFTN/NIGHT. PRESSURE FALLS ACROSS THE OH VALLEY NOT EXPECTED UNTIL LATE SAT MORNING/AFTN WHICH WILL HOLD EASTERN WEDGE IN A LITTLE LONGER. TEMPS FORECAST FOR THIS PERIOD WILL BE TRICKY WITH LYH VICINITY THE LAST TO BREAK OUT OF THE WEDGE. CURRENT FORECAST FOR SAT PROJECTS THAT WEDGE/CLOUDS WILL BREAK IN THE AFTN WITH TEMPS SOARING INTO THE MID 70S TO LOWER 80S. SATURDAY NIGHT-SUNDAY... FRONTAL TIMING HAS CHANGED VERY LITTLE FROM THE PREVIOUS RUN WITH FRONT MOVING THRU FA LATE SATURDAY NIGHT-SUNDAY MORNING. WITH SFC LOW MOVING FARTHER NORTH...GREATER DYNAMICS HAVE ALSO SHIFTED TO THE NORTH. GOOD NEWS IS THAT THE STRONGER AND MAJORITY OF THE ENERGY STILL STAYS WELL NORTH IN THE OHIO VALLEY/GREAT LAKES REGION. FOR THE FORECAST AREA...SE WV WILL LIKELY SEE THE HEAVIEST PCPN SATURDAY EVENING. AS THIS BAND OF PCPN PROGRESS TO THE EAST...IT SHOULD LOSE SOME MOMENTUM AND REFIRE SUNDAY AFTN EAST OF DAN-LYH. SUNDAY NIGHT-TUESDAY... HIGH PRESSURE WILL MOVE INTO THE REGION FROM THE WEST. WITH NORTHERLY FLOW FOR THE FIRST PART OF THE WEEK...TEMPS WILL FALL SLIGHTLY BELOW NORMAL. TUESDAY NIGHT-THURSDAY... A WARM FRONT WILL MOVE THRU THE REGION. A RIDGE AXIS WILL BE DIRECTED ALONG THE MS VALLEY. WAVES COMING OUT OF THE ROCKIES WILL TRACK AROUND THE RIDGE AND ALONG THE WARM FRONT. IF THIS SET UP VERIFIES...A FEW DISTURBANCES (MCS) COULD BRING STORMY CONDITIONS TO THE MID ATLANTIC REGION WEDNESDAY AND THURSDAY. && .RNK WATCHES/WARNINGS/ADVISORIES... VA...NONE. NC...NONE. WV...NONE. && JJ/RCS
Hazardous weather outlook, May 12, 5:49 AM EDT, 12 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BLACKSBURG VA 549 AM EDT THU MAY 12 2005 NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059- WVZ042>045-131000- ASHE-ALLEGHANY-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES- YADKIN-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY- GRAYSON-CARROLL-FLOYD-CRAIG-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE- PATRICK-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL- APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-MERCER-SUMMERS-MONROE- GREENBRIER- 549 AM EDT THU MAY 12 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST VIRGINIA...WEST CENTRAL VIRGINIA...CENTRAL VIRGINIA...NORTHWEST NORTH CAROLINA...SOUTH CENTRAL VIRGINIA...SOUTHEAST WEST VIRGINIA AND NORTH CENTRAL NORTH CAROLINA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER EXPECTED AT THIS TIME...ALTHOUGH SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE REGION THIS AFTERNOON. ISOLATED STORMS COULD BE QUITE STRONG...PRODUCING STRONG WINDS...SMALL HAIL AND TORRENTIAL RAIN. THE STRONGEST ACTIVITY WILL LIKELY OCCUR IN THE PIEDMONT...ALONG AND NEAR THE NORTH CAROLINA / VIRGINIA BORDER. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Local storm report, May 12, 2:45 PM EDT, 3 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
245 PM EDT THU MAY 12 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0215 PM TSTM WND GST 1 SE AXTON 36.66N 79.70W
05/12/2005 0 MPH HENRY VA COUNTY OFFICIAL
WIND KNOCKED TREE BRANCH ONTO POWER LINE, WHICH STARTED
BRUSH FIRE IN RURAL HENRY COUNTY
&&The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 1:56 PM EDT | Severe Thunderstorm Warning | RNK | Henry, City of Martinsville | 49 min |
| May 12, 2:29 PM EDT | Severe Thunderstorm Warning | RNK | Buckingham | 46 min |
| May 12, 5:03 PM EDT | Severe Thunderstorm Warning | RNK | Franklin | 27 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2005Every severe thunderstorm warning in 2005
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.