Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 53, NWS Blacksburg, VA

March 24, 2012Caswell County, North Carolina; 4 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Mar 24, 2012, 7:39 PM EDT for Caswell County, North Carolina; 4 counties in Virginia. It was in force for 81 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: Mar 24, 2012, 7:39 PM EDT (23:39 UTC)
Expired: Mar 24, 2012, 9:00 PM EDT
In force: 81 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Caswell County, NC, Campbell County, VA, Charlotte County, VA, Halifax County, VA, Pittsylvania County, VA

The radar

The Raleigh/Durham radar (KRAX), 128 km from the middle of the area, began a volume at 23:42 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
Mar 24, 8:45 PM EDT	TSTM WND DMG	1 Ese Madisonville, VA	ROOF DAMAGE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 24, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 24, 3:38 PM EDT	Tornado Watch	SPC	7 hr
Mar 24, 6:43 PM EDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 11.7 hours before the alert went out and 75 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: 250 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 519 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: -13 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.

469 
WUUS51 KRNK 242339
SVRRNK
NCC033-VAC031-037-083-143-250100-
/O.NEW.KRNK.SV.W.0053.120324T2339Z-120325T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
739 PM EDT SAT MAR 24 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CASWELL COUNTY IN NORTH CENTRAL NORTH CAROLINA
  EASTERN PITTSYLVANIA COUNTY IN SOUTH CENTRAL VIRGINIA
  HALIFAX COUNTY IN SOUTH CENTRAL VIRGINIA
  CHARLOTTE COUNTY IN SOUTH CENTRAL VIRGINIA
  SOUTHERN CAMPBELL COUNTY IN CENTRAL VIRGINIA

* UNTIL 900 PM EDT.

* AT 730 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE DAMAGING
  HAIL UP TO GOLF BALL SIZE.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR HURT VIRGINIA TO YANCEYVILLE NORTH CAROLINA.
  THIS LINE OF STORMS WAS MOVING  EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LONG ISLAND...
  NATHALIE...
  HALIFAX...
  SOUTH BOSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED WEAK ROTATION WITHIN SOME OF THESE 
STORMS. 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 ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT SUNDAY 
MORNING FOR NORTH CENTRAL NORTH CAROLINA AND SOUTH CENTRAL VIRGINIA.

&&

LAT...LON 3686 7851 3670 7864 3665 7860 3669 7865
      3667 7870 3654 7873 3654 7913 3641 7914
      3641 7933 3657 7933 3657 7931 3659 7933
      3711 7931 3720 7867 3715 7859 3713 7850
      3709 7848 3708 7844
TIME...MOT...LOC 2333Z 263DEG 22KT 3702 7928 3642 7929

$$

4 follow-up statements

438 
WWUS51 KRNK 250006
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
806 PM EDT SAT MAR 24 2012

NCC033-VAC143-250011-
/O.CAN.KRNK.SV.W.0053.000000T0000Z-120325T0100Z/
CASWELL NC-PITTSYLVANIA VA-
806 PM EDT SAT MAR 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CASWELL AND
EASTERN PITTSYLVANIA COUNTIES IS CANCELLED...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A TORNADO
WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT SUNDAY MORNING FOR
NORTH CENTRAL NORTH CAROLINA AND SOUTH CENTRAL VIRGINIA.

&&

LAT...LON 3686 7851 3670 7864 3667 7861 3669 7865
      3667 7870 3654 7873 3654 7922 3706 7909
      3709 7913 3706 7919 3712 7921 3710 7923
      3712 7925 3711 7930 3720 7867 3716 7861
      3713 7850 3709 7848 3708 7844
TIME...MOT...LOC 0001Z 263DEG 22KT 3704 7907 3644 7908

$$

VAC031-037-083-250100-
/O.CON.KRNK.SV.W.0053.000000T0000Z-120325T0100Z/
HALIFAX VA-CHARLOTTE VA-CAMPBELL VA-
806 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR HALIFAX...CHARLOTTE AND SOUTHERN CAMPBELL COUNTIES...

AT 800 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE
DAMAGING HAIL UP TO GOLF BALL SIZE.  THESE STORMS WERE LOCATED ALONG 
THE PITTSYLVANIA...HALIFAX COUNTY LINE...MOVING EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  BROOKNEAL...
  NATHALIE...
  SOUTH BOSTON...
  VIRGILINA...
  STAUNTON RIVER STATE PARK.

BOATERS ON THE KERR RESERVOIR...BUGGS ISLAND AREA...NEED TO MOVE TO 
SHORE NOW!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN SOME OF THESE 
STORMS. 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.

A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT SUNDAY 
MORNING FOR NORTH CENTRAL NORTH CAROLINA AND SOUTH CENTRAL VIRGINIA.

&&

LAT...LON 3686 7851 3670 7864 3667 7861 3669 7865
      3667 7870 3654 7873 3654 7922 3706 7909
      3709 7913 3706 7919 3712 7921 3710 7923
      3712 7925 3711 7930 3720 7867 3716 7861
      3713 7850 3709 7848 3708 7844
TIME...MOT...LOC 0001Z 263DEG 22KT 3704 7907 3644 7908

$$

558 
WWUS51 KRNK 250028
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
828 PM EDT SAT MAR 24 2012

VAC031-037-083-250100-
/O.CON.KRNK.SV.W.0053.000000T0000Z-120325T0100Z/
HALIFAX VA-CHARLOTTE VA-CAMPBELL VA-
828 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR EASTERN HALIFAX...CHARLOTTE AND SOUTHEASTERN CAMPBELL COUNTIES...

AT 826 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING ONE INCH
DIAMETER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM HAT CREEK TO
HITESBURG...OR ALONG A LINE EXTENDING FROM BROOKNEAL TO VIRGILINA...
MOVING EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  SCOTTSBURG...
  HAT CREEK...
  STAUNTON RIVER STATE PARK...
  WREN...
  REDOAK...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A TORNADO
WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT SUNDAY MORNING FOR
NORTH CENTRAL NORTH CAROLINA AND SOUTH CENTRAL VIRGINIA.

&&

LAT...LON 3687 7850 3672 7862 3668 7863 3667 7870
      3654 7873 3654 7895 3681 7894 3706 7909
      3709 7912 3706 7919 3711 7920 3710 7923
      3712 7924 3720 7867 3716 7861 3713 7851
      3708 7844
TIME...MOT...LOC 0028Z 263DEG 22KT 3711 7897 3660 7871

$$

DS

619 
WWUS51 KRNK 250048
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
848 PM EDT SAT MAR 24 2012

VAC031-037-083-250100-
/O.CON.KRNK.SV.W.0053.000000T0000Z-120325T0100Z/
HALIFAX VA-CHARLOTTE VA-CAMPBELL VA-
848 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHEASTERN HALIFAX...CHARLOTTE AND EASTERN CAMPBELL COUNTIES...

AT 845 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM WREN TO REDOAK...OR ALONG A LINE EXTENDING FROM RED 
HOUSE TO REDOAK...MOVING EAST AT 25 MPH. HAIL UP TO PENNY SIZE IS 
POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
  PHENIX...
  WYLLIESBURG...
  CHARLOTTE COURT HOUSE...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A TORNADO
WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT SUNDAY MORNING FOR
NORTH CENTRAL NORTH CAROLINA AND SOUTH CENTRAL VIRGINIA.

&&

LAT...LON 3687 7850 3672 7862 3669 7864 3716 7895
      3720 7867 3716 7861 3713 7851 3708 7844
TIME...MOT...LOC 0048Z 263DEG 22KT 3714 7878 3675 7858

$$

DS

124 
WWUS51 KRNK 250059
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
859 PM EDT SAT MAR 24 2012

VAC031-037-083-250109-
/O.EXP.KRNK.SV.W.0053.000000T0000Z-120325T0100Z/
HALIFAX VA-CHARLOTTE VA-CAMPBELL VA-
859 PM EDT SAT MAR 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HALIFAX...
CHARLOTTE AND SOUTHEASTERN CAMPBELL COUNTIES EXPIRES AT 900 PM EDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING IS WEAKENING 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT SUNDAY MORNING
FOR NORTH CENTRAL NORTH CAROLINA AND SOUTH CENTRAL VIRGINIA.

LAT...LON 3687 7850 3672 7862 3669 7864 3716 7895
      3720 7867 3716 7861 3713 7851 3708 7844
TIME...MOT...LOC 0059Z 263DEG 22KT 3715 7870 3676 7850

$$

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 24, 12:24 PM EDT	Special Weather Statement	RNK	Alleghany	51 min
Mar 24, 12:43 PM EDT	Special Weather Statement	RNK	Wilkes	47 min
Mar 24, 12:48 PM EDT	Special Weather Statement	RNK	Stokes	42 min
Mar 24, 1:30 PM EDT	Severe Thunderstorm Warning	RNK	Ashe	60 min
Mar 24, 2:00 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry	60 min
Mar 24, 2:34 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe	56 min
Mar 24, 2:34 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes	56 min
Mar 24, 2:44 PM EDT	Severe Thunderstorm Warning	RNK	Surry	61 min
Mar 24, 2:52 PM EDT	Flash Flood Warning	RNK	Surry	6 hr
Mar 24, 3:26 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry	64 min
Mar 24, 4:08 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Wilkes, Yadkin	67 min
Mar 24, 4:31 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Yadkin	44 min
Mar 24, 5:35 PM EDT	Severe Thunderstorm Warning	RNK	Surry	55 min
Mar 24, 6:05 PM EDT	Flash Flood Warning	RNK	Surry	4 hr
Mar 24, 6:07 PM EDT	Severe Thunderstorm Warning	RNK	Stokes	53 min
Mar 24, 6:16 PM EDT	Special Weather Statement	RNK	Alleghany	29 min
Mar 24, 6:45 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	60 min
Mar 24, 12:32 PM EDT	Special Weather Statement	RNK	Grayson, Wythe	43 min
Mar 24, 1:21 PM EDT	Special Weather Statement	RNK	Carroll	39 min
Mar 24, 1:25 PM EDT	Special Weather Statement	RNK	Grayson	50 min
Mar 24, 1:28 PM EDT	Special Weather Statement	RNK	Wythe	47 min
Mar 24, 1:57 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Smyth, Tazewell, Wythe	63 min
Mar 24, 2:22 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Grayson, Pulaski, Smyth, Wythe	53 min
Mar 24, 2:30 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Tazewell	60 min
Mar 24, 2:57 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Giles, Pulaski, Wythe	63 min
Mar 24, 3:30 PM EDT	Special Weather Statement	RNK	Pulaski	30 min
Mar 24, 3:37 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Craig, Giles, Montgomery, Pulaski	53 min
Mar 24, 3:39 PM EDT	Severe Thunderstorm Warning	RNK	Floyd, Franklin, Henry, Patrick	66 min
Mar 24, 3:46 PM EDT	Tornado Warning	RNK	Floyd, Patrick	29 min
Mar 24, 4:15 PM EDT	Tornado Warning	RNK	Franklin, Patrick	30 min
Mar 24, 4:26 PM EDT	Special Weather Statement	RNK	Alleghany	34 min
Mar 24, 4:41 PM EDT	Tornado Warning	RNK	Franklin	34 min
Mar 24, 4:48 PM EDT	Tornado Warning	RNK	Patrick	42 min
Mar 24, 5:09 PM EDT	Tornado Warning	RNK	Bedford, Franklin	36 min
Mar 24, 5:17 PM EDT	Flash Flood Warning	RNK	Floyd, Patrick	5 hr
Mar 24, 5:24 PM EDT	Tornado Warning	RNK	Henry, Patrick	36 min
Mar 24, 5:38 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Pittsylvania	67 min
Mar 24, 5:51 PM EDT	Tornado Warning	RNK	Franklin, Henry, City of Martinsville	39 min
Mar 24, 6:05 PM EDT	Tornado Warning	RNK	Campbell	25 min
Mar 24, 6:19 PM EDT	Tornado Warning	RNK	Pittsylvania	41 min
Mar 24, 6:25 PM EDT	Flash Flood Warning	RNK	Franklin, Henry, Patrick	4 hr
Mar 24, 6:25 PM EDT	Tornado Warning	RNK	Amherst, Bedford, Campbell, City of Lynchburg	35 min
Mar 24, 6:33 PM EDT	Severe Thunderstorm Warning	RNK	Henry, City of Martinsville	34 min
Mar 24, 6:46 PM EDT	Areal Flood Advisory	RNK	Amherst, Bedford, Campbell, City of Lynchburg	3 hr
Mar 24, 6:53 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Campbell	37 min
Mar 24, 7:04 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania	56 min
Mar 24, 7:30 PM EDT	Special Weather Statement	RNK	Buckingham	30 min
Mar 24, 7:57 PM EDT	Special Weather Statement	RNK	Buckingham	33 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2012 Severe Thunderstorm Warnings in North Carolina, 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.