Alert archive / Virginia / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 331, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 7, 2012, 5:30 PM EDT for Pittsylvania County, Virginia. It was in force for 60 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
- Aug 7, 2012, 5:30 PM EDT (21:30 UTC)
- Expired
- Aug 7, 2012, 6:30 PM EDT
- In force
- 60 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
County Pittsylvania County, VA
The radar
The Roanoke radar (KFCX), 85 km from the middle of the area, began a volume at 21:31 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.
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 9.5 hours before the alert went out and 35 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
- 699 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
552
WUUS51 KRNK 072130
SVRRNK
VAC143-072230-
/O.NEW.KRNK.SV.W.0331.120807T2130Z-120807T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
530 PM EDT TUE AUG 7 2012
THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN PITTSYLVANIA COUNTY IN SOUTH CENTRAL VIRGINIA
* UNTIL 630 PM EDT.
* AT 526 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 GRETNA...AND MOVING SOUTH AT 5 MPH.
* LOCATIONS IMPACTED INCLUDE...
HURT...
GRETNA...
CHALK LEVEL...
JAVA...
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 3678 7950 3708 7941 3710 7932 3709 7926
3680 7915 3679 7916
TIME...MOT...LOC 2131Z 000DEG 6KT 3696 7931
$$5 follow-up statements
528
WWUS51 KRNK 072148
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
548 PM EDT TUE AUG 7 2012
VAC143-072230-
/O.CON.KRNK.SV.W.0331.000000T0000Z-120807T2230Z/
PITTSYLVANIA VA-
548 PM EDT TUE AUG 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHEASTERN PITTSYLVANIA COUNTY...
AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR GRETNA...NEARLY
STATIONARY.
LOCATIONS IMPACTED INCLUDE...
GRETNA...
CHALK LEVEL...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN
DO SO SAFELY. ONCE AGAIN THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4.
&&
LAT...LON 3678 7950 3708 7941 3710 7932 3709 7926
3680 7915 3679 7916
TIME...MOT...LOC 2148Z 352DEG 2KT 3694 7938
$$844
WWUS51 KRNK 072156
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
556 PM EDT TUE AUG 7 2012
VAC143-072230-
/O.CON.KRNK.SV.W.0331.000000T0000Z-120807T2230Z/
PITTSYLVANIA VA-
556 PM EDT TUE AUG 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL PITTSYLVANIA COUNTY...
AT 556 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR GRETNA. THIS STORM WAS NEARLY STATIONARY.
LOCATIONS IMPACTED INCLUDE...
GRETNA...
CHALK LEVEL...
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 3678 7950 3706 7941 3708 7940 3706 7929
3679 7923
TIME...MOT...LOC 2156Z 352DEG 2KT 3694 7938
$$265
WWUS51 KRNK 072203
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
603 PM EDT TUE AUG 7 2012
VAC143-072230-
/O.CON.KRNK.SV.W.0331.000000T0000Z-120807T2230Z/
PITTSYLVANIA VA-
603 PM EDT TUE AUG 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL PITTSYLVANIA COUNTY...
AT 600 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR GRETNA...MOVING SOUTHWEST AT 5 MPH.
LOCATIONS IMPACTED INCLUDE...
GRETNA...
CHATHAM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN
DO SO SAFELY. ONCE AGAIN THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4.
&&
LAT...LON 3687 7932 3679 7934 3678 7950 3706 7941
3708 7940 3707 7934
TIME...MOT...LOC 2203Z 025DEG 3KT 3694 7943
$$775
WWUS51 KRNK 072216
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
616 PM EDT TUE AUG 7 2012
VAC143-072230-
/O.CON.KRNK.SV.W.0331.000000T0000Z-120807T2230Z/
PITTSYLVANIA VA-
616 PM EDT TUE AUG 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL PITTSYLVANIA COUNTY...
AT 614 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 GRETNA...MOVING
SOUTHWEST AT 5 MPH.
LOCATIONS IMPACTED INCLUDE...
GRETNA...
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 3702 7934 3689 7932 3686 7934 3685 7948
3690 7946 3699 7943
TIME...MOT...LOC 2217Z 025DEG 3KT 3693 7944
$$763
WWUS51 KRNK 072224
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
624 PM EDT TUE AUG 7 2012
VAC143-072233-
/O.EXP.KRNK.SV.W.0331.000000T0000Z-120807T2230Z/
PITTSYLVANIA VA-
624 PM EDT TUE AUG 7 2012
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PITTSYLVANIA COUNTY
EXPIRES AT 630 PM EDT...
THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS MOVED WEST.
THUS THE WARNING WILL BE ALLOWED TO EXPIRE.
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4. ONCE AGAIN
THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4.
LAT...LON 3702 7934 3689 7932 3686 7934 3685 7948
3690 7946 3699 7943
TIME...MOT...LOC 2223Z 025DEG 3KT 3693 7944
$$The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 11:03 PM EDT | Areal Flood Advisory | RNK | Halifax | 2 hr |
| Aug 6, 11:52 PM EDT | Special Weather Statement | RNK | Halifax | 53 min |
| Aug 7, 4:42 PM EDT | Special Weather Statement | RNK | Pittsylvania | 33 min |
| Aug 7, 5:17 PM EDT | Special Weather Statement | RNK | Pittsylvania | 28 min |
| Aug 7, 6:05 PM EDT | Special Weather Statement | RNK | Pittsylvania | 25 min |
| Aug 7, 6:13 PM EDT | Areal Flood Advisory | RNK | Pittsylvania | 3 hr |
| Aug 7, 6:43 PM EDT | Special Weather Statement | RNK | Pittsylvania | 32 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2012Every severe thunderstorm warning in 2012
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.