Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 7, NWS Blacksburg, VA

February 24, 2012Bedford County, Campbell County, Franklin County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Feb 24, 2012, 1:42 PM EST for Bedford County, Campbell County, Franklin County, Virginia. It was in force for 20 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: Feb 24, 2012, 1:42 PM EST (18:42 UTC)
Expired: Feb 24, 2012, 2:02 PM EST
In force: 20 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Bedford County, VA, Campbell County, VA, Franklin County, VA

The radar

The Roanoke radar (KFCX), 69 km from the middle of the area, began a volume at 18:44 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, 6.7 hours before the alert went out and 5 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.

715 
WUUS51 KRNK 241842
SVRRNK
VAC019-031-067-241930-
/O.NEW.KRNK.SV.W.0007.120224T1842Z-120224T1930Z/

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

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN FRANKLIN COUNTY IN WEST CENTRAL VIRGINIA
  WESTERN CAMPBELL COUNTY IN CENTRAL VIRGINIA
  SOUTHERN BEDFORD COUNTY IN SOUTH CENTRAL VIRGINIA

* UNTIL 230 PM EST.

* AT 139 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 BURNT CHIMNEY...OR 8 MILES EAST OF BOONES MILL...AND MOVING
  NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BURNT CHIMNEY...
  NORTHWEST SMITH MOUNTAIN LAKE...
  MONETA...
  HUDDLESTON...
  EVINGTON...

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.

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.

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 3728 7952 3737 7935 3723 7915 3704 7983
      3720 7987
TIME...MOT...LOC 1842Z 241DEG 56KT 3716 7976

$$

SK

1 follow-up statement

440 
WWUS51 KRNK 241902
SVSRNK

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

VAC019-031-067-241912-
/O.CAN.KRNK.SV.W.0007.000000T0000Z-120224T1930Z/
FRANKLIN VA-CAMPBELL VA-BEDFORD VA-
202 PM EST FRI FEB 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FRANKLIN...
WESTERN CAMPBELL AND SOUTHERN BEDFORD COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE 
WARNED AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1 8 6 6...2 1 5...4 3 2 4.

STAY TUNED TO NOAA WEATHER RADIO...TV OR YOUR LOCAL NEW SOURCE FOR
THE LATEST WEATHER INFORMATION. REPORT ANY SEVERE WEATHER OR STORM
RELATED DAMAGE TO LOCAL LAW ENFORCEMENT OFFICIALS AND ASK THEM TO
IMMEDIATELY RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE IN
BLACKSBURG.

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.

LAT...LON 3728 7952 3737 7935 3723 7915 3704 7983
      3720 7987
TIME...MOT...LOC 1902Z 241DEG 56KT 3730 7941

$$

SK

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, 12:33 PM EST	Severe Thunderstorm Warning	RNK	Alleghany, Amherst, Bedford, Botetourt, Craig, Rockbridge and 1 more	42 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, 1:46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.