Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 4, NWS Blacksburg, VA

February 24, 20127 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Feb 24, 2012, 12:33 PM EST for 7 counties in Virginia. It was in force for 42 min. 1 report 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: Feb 24, 2012, 12:33 PM EST (17:33 UTC)
Expired: Feb 24, 2012, 1:15 PM EST
In force: 42 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Alleghany County, VA, Amherst County, VA, Bedford County, VA, Botetourt County, VA, City of Buena Vista, VA, Craig County, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 78 km from the middle of the area, began a volume at 17:36 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
Feb 24, 1:15 PM EST	HAIL 0.75	Big Island, VA

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, 5.6 hours before the alert went out and 58 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 14 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 746 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 387 m²/s²
0-3 km storm-relative helicity: 512 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

926 
WUUS51 KRNK 241733
SVRRNK
VAC005-009-019-023-045-163-530-241815-
/O.NEW.KRNK.SV.W.0004.120224T1733Z-120224T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
1233 PM EST FRI FEB 24 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN ROCKBRIDGE COUNTY IN WEST CENTRAL VIRGINIA
  CITY OF BUENA VISTA IN WEST CENTRAL VIRGINIA
  NORTHEASTERN CRAIG COUNTY IN SOUTHWEST VIRGINIA
  CENTRAL BOTETOURT COUNTY IN WEST CENTRAL VIRGINIA
  NORTHERN BEDFORD COUNTY IN SOUTH CENTRAL VIRGINIA
  WESTERN AMHERST COUNTY IN CENTRAL VIRGINIA
  SOUTHWESTERN ALLEGHANY COUNTY IN WEST CENTRAL VIRGINIA

* UNTIL 115 PM EST.

* AT 1228 PM EST...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 POTTS CREEK...OR NEAR PAINT BANK...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ORISKANY...
  EAGLE ROCK...
  NATURAL BRIDGE...
  GLASGOW...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EST FRIDAY AFTERNOON
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

&&

LAT...LON 3778 7935 3753 7931 3750 8027 3760 8025
      3762 8022 3765 8024 3767 7984
TIME...MOT...LOC 1732Z 263DEG 43KT 3758 8015

$$

WP

3 follow-up statements

349 
WWUS51 KRNK 241745
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1245 PM EST FRI FEB 24 2012

VAC005-241755-
/O.CAN.KRNK.SV.W.0004.000000T0000Z-120224T1815Z/
ALLEGHANY VA-
1245 PM EST FRI FEB 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ALLEGHANY COUNTY
IS CANCELLED...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EST FRIDAY AFTERNOON
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

&&

LAT...LON 3778 7935 3753 7931 3752 8022 3761 8008
      3764 8007 3766 8003 3765 8002 3766 8001
      3767 7984
TIME...MOT...LOC 1745Z 257DEG 53KT 3765 7987

$$

VAC009-019-023-045-163-530-241815-
/O.CON.KRNK.SV.W.0004.000000T0000Z-120224T1815Z/
ROCKBRIDGE VA-CITY OF BUENA VISTA VA-CRAIG VA-BOTETOURT VA-BEDFORD VA-
AMHERST VA-
1245 PM EST FRI FEB 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EST
FOR THE CITY OF BUENA VISTA... SOUTHWESTERN ROCKBRIDGE...NORTHEASTERN
CRAIG...CENTRAL BOTETOURT...NORTHERN BEDFORD AND WESTERN AMHERST
COUNTIES...

AT 1240 PM EST...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 ORISKANY...MOVING EAST
AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  ORISKANY...
  EAGLE ROCK...
  NATURAL BRIDGE...
  GLASGOW...
  BUENA VISTA CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 3778 7935 3753 7931 3752 8022 3761 8008
      3764 8007 3766 8003 3765 8002 3766 8001
      3767 7984
TIME...MOT...LOC 1745Z 257DEG 53KT 3765 7987

$$

WP

364 
WWUS51 KRNK 241759
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1259 PM EST FRI FEB 24 2012

VAC045-241810-
/O.CAN.KRNK.SV.W.0004.000000T0000Z-120224T1815Z/
CRAIG VA-
1259 PM EST FRI FEB 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CRAIG COUNTY IS
CANCELLED...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EST FRIDAY AFTERNOON
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

&&

LAT...LON 3760 7979 3765 7977 3768 7978 3778 7935
      3753 7931
TIME...MOT...LOC 1800Z 261DEG 54KT 3769 7956

$$

VAC009-019-023-163-530-241815-
/O.CON.KRNK.SV.W.0004.000000T0000Z-120224T1815Z/
ROCKBRIDGE VA-CITY OF BUENA VISTA VA-BOTETOURT VA-BEDFORD VA-
AMHERST VA-
1259 PM EST FRI FEB 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EST
FOR THE CITY OF BUENA VISTA... SOUTHWESTERN ROCKBRIDGE...EASTERN
BOTETOURT...NORTHERN BEDFORD AND WESTERN AMHERST COUNTIES...

AT 1258 PM EST...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 NATURAL BRIDGE...OR
NEAR COLLIERSTOWN...MOVING EAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  NATURAL BRIDGE...
  GLASGOW...
  BUENA VISTA CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EST FRIDAY AFTERNOON
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

&&

LAT...LON 3760 7979 3765 7977 3768 7978 3778 7935
      3753 7931
TIME...MOT...LOC 1800Z 261DEG 54KT 3769 7956

$$

WP

696 
WWUS51 KRNK 241812
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
112 PM EST FRI FEB 24 2012

VAC009-019-023-163-530-241821-
/O.EXP.KRNK.SV.W.0004.000000T0000Z-120224T1815Z/
ROCKBRIDGE VA-CITY OF BUENA VISTA VA-BOTETOURT VA-BEDFORD VA-
AMHERST VA-
112 PM EST FRI FEB 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR THE CITY OF BUENA VISTA...
SOUTHWESTERN ROCKBRIDGE...EASTERN BOTETOURT...NORTHERN BEDFORD AND
WESTERN AMHERST COUNTIES EXPIRES AT 115 PM EST...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED BELOW 
SEVERE LIMITS. AT 111 PM...THIS STORM WAS LOCATED 3 MILES SOUTHEAST 
OF COLLIERSTOWN...MOVING EAST AT 55 MPH. THIS STORM WILL STILL HAVE 
GUSTY WINDS UP TO 45 MPH AS IT MOVES TO THE BLUE RIDGE ALONG THE 
AMHERST AND ROCKBRIDGE COUNTY LINE...SO THOSE IN BUENA VISTA CAN 
EXPECT THIS STORM BY 120 PM.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EST FRIDAY AFTERNOON
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

LAT...LON 3760 7979 3765 7977 3768 7978 3778 7935
      3753 7931
TIME...MOT...LOC 1811Z 261DEG 54KT 3771 7938

$$

WP

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 24, 6:00 AM EST	Special Weather Statement	RNK	Smyth	30 min
Feb 24, 6:14 AM EST	Special Weather Statement	RNK	Alleghany, City of Covington	31 min
Feb 24, 9:55 AM EST	Special Weather Statement	RNK	Bland, Giles	35 min
Feb 24, 11:36 AM EST	Severe Thunderstorm Warning	RNK	Bland, Giles, Tazewell	32 min
Feb 24, 12:06 PM EST	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt, City of Covington	39 min
Feb 24, 12:41 PM EST	Severe Thunderstorm Warning	RNK	Patrick	34 min
Feb 24, 12:57 PM EST	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Floyd, Franklin, Montgomery and 3 more	63 min
Feb 24, 1:42 PM EST	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin	20 min
Feb 24, 1:46 PM EST	Severe Thunderstorm Warning	RNK	Floyd, Franklin	44 min
Feb 24, 1:53 PM EST	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Bedford, Buckingham, Campbell, City of Lynchburg	57 min
Feb 24, 2:12 PM EST	Special Weather Statement	RNK	Amherst	33 min
Feb 24, 2:18 PM EST	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin, Pittsylvania	42 min
Feb 24, 2:42 PM EST	Special Weather Statement	RNK	Henry, City of Martinsville	48 min
Feb 24, 2:47 PM EST	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania, City of Martinsville	19 min
Feb 24, 3:04 PM EST	Special Weather Statement	RNK	City of Danville	41 min
Feb 24, 3:10 PM EST	Special Weather Statement	RNK	Buckingham, City of Lynchburg	35 min
Feb 24, 3:45 PM EST	Special Weather Statement	RNK	City of Danville	45 min
Feb 24, 4:13 PM EST	Special Weather Statement	RNK	Charlotte	47 min
Feb 24, 4:29 PM EST	Special Weather Statement	RNK	Halifax	16 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.