Alert archive / Virginia / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 421, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 8, 2011, 6:06 PM EDT for Halifax County, Pittsylvania County, City of Danville, Virginia; Caswell County, Rockingham County, North Carolina. It was in force for 54 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 8, 2011, 6:06 PM EDT (22:06 UTC)
- Expired
- Jul 8, 2011, 7:00 PM EDT
- In force
- 54 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
Counties Caswell County, NC, Rockingham County, NC, City of Danville, VA, Halifax County, VA, Pittsylvania County, VA
The radar
The Roanoke radar (KFCX), 83 km from the middle of the area, began a volume at 22:09 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 8, 6:13 PM EDT | TSTM WND DMG | 2 W Blairs, VA | TREE DOWN ALONG FRANKLIN TURNPIKE...SR41...NEAR MT. HERMON BAPTIST CHURCH. |
| Jul 8, 6:13 PM EDT | TSTM WND DMG | 3 W Blairs, VA | TREES DOWN ALONG ROBERSTON LANE. ONE FELL ON A POWER POLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 10.1 hours before the alert went out and 60 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
- 580 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 592 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
250
WUUS51 KRNK 082206
SVRRNK
NCC033-157-VAC083-143-590-082300-
/O.NEW.KRNK.SV.W.0421.110708T2206Z-110708T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
606 PM EDT FRI JUL 8 2011
THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN CASWELL COUNTY IN NORTH CENTRAL NORTH CAROLINA
NORTHEASTERN ROCKINGHAM COUNTY IN NORTH CENTRAL NORTH CAROLINA
PITTSYLVANIA COUNTY IN SOUTH CENTRAL VIRGINIA
CITY OF DANVILLE IN SOUTH CENTRAL VIRGINIA
WESTERN HALIFAX COUNTY IN SOUTH CENTRAL VIRGINIA
* UNTIL 700 PM EDT.
* AT 605 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR WESTOVER HILLS...OR 7 MILES NORTH OF MAYFIELD...AND MOVING
NORTHEAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...
BLAIRS...
KEELING...
JAVA...
LEDA...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF QUARTER 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 3654 7965 3661 7970 3664 7970 3703 7917
3678 7888 3646 7949
TIME...MOT...LOC 2206Z 231DEG 30KT 3662 7953
$$4 follow-up statements
475
WWUS51 KRNK 082221
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
621 PM EDT FRI JUL 8 2011
NCC033-157-082231-
/O.CAN.KRNK.SV.W.0421.000000T0000Z-110708T2300Z/
CASWELL NC-ROCKINGHAM NC-
621 PM EDT FRI JUL 8 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CASWELL AND
NORTHEASTERN ROCKINGHAM COUNTIES IS CANCELLED...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
&&
LAT...LON 3654 7942 3654 7958 3656 7963 3669 7956
3672 7958 3703 7917 3678 7888
TIME...MOT...LOC 2221Z 231DEG 30KT 3670 7941
$$
VAC083-143-590-082300-
/O.CON.KRNK.SV.W.0421.000000T0000Z-110708T2300Z/
PITTSYLVANIA VA-CITY OF DANVILLE VA-HALIFAX VA-
621 PM EDT FRI JUL 8 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR THE CITY OF DANVILLE... SOUTHERN PITTSYLVANIA AND WESTERN HALIFAX
COUNTIES...
AT 619 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER
SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM
WAS LOCATED NEAR BLAIRS...MOVING NORTHEAST AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
BLAIRS...
KEELING...
JAVA...
LEDA...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INTENSE RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM.
TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN
DO SO SAFELY. ONCE AGAIN THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4.
&&
LAT...LON 3654 7942 3654 7958 3656 7963 3669 7956
3672 7958 3703 7917 3678 7888
TIME...MOT...LOC 2221Z 231DEG 30KT 3670 7941
$$992
WWUS51 KRNK 082232
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
632 PM EDT FRI JUL 8 2011
VAC083-143-590-082300-
/O.CON.KRNK.SV.W.0421.000000T0000Z-110708T2300Z/
PITTSYLVANIA VA-CITY OF DANVILLE VA-HALIFAX VA-
632 PM EDT FRI JUL 8 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR THE CITY OF DANVILLE... SOUTHERN PITTSYLVANIA AND WESTERN HALIFAX
COUNTIES...
AT 628 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER
SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM
WAS LOCATED NEAR KEELING...OR NEAR BLAIRS...MOVING NORTHEAST AT 35
MPH.
LOCATIONS IMPACTED INCLUDE...
KEELING...
JAVA...
RIDGEWAY...
MT AIRY...
LEDA...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN
DO SO SAFELY. ONCE AGAIN THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4.
&&
LAT...LON 3654 7942 3654 7958 3656 7963 3669 7956
3672 7958 3703 7917 3678 7888
TIME...MOT...LOC 2233Z 231DEG 30KT 3676 7931
$$738 WWUS51 KRNK 082244 SVSRNK SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BLACKSBURG VA 644 PM EDT FRI JUL 8 2011 VAC590-082255- /O.CAN.KRNK.SV.W.0421.000000T0000Z-110708T2300Z/ CITY OF DANVILLE VA- 644 PM EDT FRI JUL 8 2011 ...THE SEVERE THUNDERSTORM WARNING FOR THE CITY OF DANVILLE... IS CANCELLED... PRECAUTIONARY/PREPAREDNESS ACTIONS... && LAT...LON 3661 7928 3682 7945 3703 7917 3678 7888 TIME...MOT...LOC 2245Z 231DEG 30KT 3683 7921 $$ VAC083-143-082300- /O.CON.KRNK.SV.W.0421.000000T0000Z-110708T2300Z/ PITTSYLVANIA VA-HALIFAX VA- 644 PM EDT FRI JUL 8 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR EASTERN PITTSYLVANIA AND WESTERN HALIFAX COUNTIES... AT 642 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR JAVA...OR 6 MILES NORTHWEST OF INGRAM...MOVING NORTHEAST AT 35 MPH. LOCATIONS IMPACTED INCLUDE... JAVA... RIDGEWAY... MT AIRY... LEDA... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN DO SO SAFELY. ONCE AGAIN THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4. && LAT...LON 3661 7928 3682 7945 3703 7917 3678 7888 TIME...MOT...LOC 2245Z 231DEG 30KT 3683 7921 $$
004 WWUS51 KRNK 082254 SVSRNK SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BLACKSBURG VA 654 PM EDT FRI JUL 8 2011 VAC083-143-082304- /O.EXP.KRNK.SV.W.0421.000000T0000Z-110708T2300Z/ PITTSYLVANIA VA-HALIFAX VA- 654 PM EDT FRI JUL 8 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN PITTSYLVANIA AND WESTERN HALIFAX COUNTIES EXPIRES AT 700 PM EDT... THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS. THUS THE WARNING WILL BE ALLOWED TO EXPIRE. TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4. ONCE AGAIN THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4. LAT...LON 3661 7928 3682 7945 3703 7917 3678 7888 TIME...MOT...LOC 2254Z 231DEG 30KT 3688 7914 $$
The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 3:58 AM EDT | Flash Flood Watch | RNK | Alleghany, Amherst, Appomattox, Bath, Bedford, Bland and 25 more | 19 hr |
| Jul 8, 1:13 PM EDT | Special Weather Statement | RNK | Franklin | 62 min |
| Jul 8, 2:07 PM EDT | Special Weather Statement | RNK | Franklin | 23 min |
| Jul 8, 2:33 PM EDT | Special Weather Statement | RNK | Campbell | 27 min |
| Jul 8, 3:11 PM EDT | Special Weather Statement | RNK | Campbell | 34 min |
| Jul 8, 3:34 PM EDT | Severe Thunderstorm Warning | RNK | Appomattox, Campbell, Charlotte | 23 min |
| Jul 8, 4:37 PM EDT | Special Weather Statement | RNK | Bedford, Franklin | 53 min |
| Jul 8, 5:07 PM EDT | Special Weather Statement | RNK | Charlotte | 53 min |
| Jul 8, 5:31 PM EDT | Special Weather Statement | RNK | Fluvanna | 14 min |
| Jul 8, 5:33 PM EDT | Special Weather Statement | RNK | City of Danville | 57 min |
| Jul 8, 5:44 PM EDT | Special Weather Statement | RNK | Botetourt, Craig | 61 min |
| Jul 8, 5:55 PM EDT | Severe Thunderstorm Warning | RNK | Bedford, Botetourt, Craig, Roanoke | 30 min |
| Jul 8, 6:12 PM EDT | Special Weather Statement | RNK | Cumberland | 63 min |
| Jul 8, 7:07 PM EDT | Special Weather Statement | RNK | Charlotte | 53 min |
| Jul 7, 8:43 PM EDT | Special Weather Statement | RNK | Rockingham | 32 min |
| Jul 7, 9:00 PM EDT | Flash Flood Warning | RNK | Rockingham | 38 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2011Severe Thunderstorm Warnings in North Carolina, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.