Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 41, NWS Blacksburg, VA

March 24, 2012Alleghany County, Surry County, North Carolina; Carroll County, Grayson County, City of Galax, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Mar 24, 2012, 3:26 PM EDT for Alleghany County, Surry County, North Carolina; Carroll County, Grayson County, City of Galax, Virginia. It was in force for 64 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: Mar 24, 2012, 3:26 PM EDT (19:26 UTC)
Expired: Mar 24, 2012, 4:30 PM EDT
In force: 64 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Alleghany County, NC, Surry County, NC, Carroll County, VA, City of Galax, VA, Grayson County, VA

The radar

The Roanoke radar (KFCX), 71 km from the middle of the area, began a volume at 19:26 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, 4:20 PM EDT	HAIL 1	2 S Crooked Oak, VA
Mar 24, 4:20 PM EDT	HAIL 1	2 S Crooked Oak, VA

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.4 hours before the alert went out and 99 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: 226 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 526 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

740 
WUUS51 KRNK 241926
SVRRNK
NCC005-171-VAC035-077-640-242030-
/O.NEW.KRNK.SV.W.0041.120324T1926Z-120324T2030Z/

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

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN ALLEGHANY COUNTY IN NORTHWEST NORTH CAROLINA
  NORTHWESTERN SURRY COUNTY IN NORTH CENTRAL NORTH CAROLINA
  CITY OF GALAX IN SOUTHWEST VIRGINIA
  SOUTHEASTERN GRAYSON COUNTY IN SOUTHWEST VIRGINIA
  CARROLL COUNTY IN SOUTHWEST VIRGINIA

* UNTIL 430 PM EDT.

* AT 321 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  GLADE VALLEY...OR 6 MILES SOUTHEAST OF SPARTA...AND MOVING
  NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GLADE VALLEY...
  BARRETT...
  CUMBERLAND KNOB...
  LAMBSBURG...
  FANCY GAP...

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL
1000 PM EDT SATURDAY EVENING FOR WEST CENTRAL VIRGINIA AND SOUTHEAST
WEST VIRGINIA.

&&

LAT...LON 3641 8104 3642 8107 3648 8113 3686 8071
      3669 8051 3666 8057 3666 8059 3664 8060
      3640 8104
TIME...MOT...LOC 1927Z 231DEG 26KT 3647 8101

$$

DS

2 follow-up statements

218 
WWUS51 KRNK 241949
SVSRNK

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

NCC005-241959-
/O.CAN.KRNK.SV.W.0041.000000T0000Z-120324T2030Z/
ALLEGHANY NC-
349 PM EDT SAT MAR 24 2012

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

THE STORM THAT PROMPTED THE WARNING HAS EXITED THE COUNTY. 
THEREFORE..THE WARNING HAS BEEN CANCELLED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT SATURDAY
EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR WEST CENTRAL VIRGINIA AND SOUTHEAST WEST
VIRGINIA.

&&

LAT...LON 3658 8093 3662 8098 3667 8093 3684 8069
      3669 8051 3666 8057 3666 8059 3664 8060
      3651 8083
TIME...MOT...LOC 1949Z 231DEG 26KT 3660 8084

$$

NCC171-VAC035-077-640-242030-
/O.CON.KRNK.SV.W.0041.000000T0000Z-120324T2030Z/
SURRY NC-CITY OF GALAX VA-GRAYSON VA-CARROLL VA-
349 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR THE CITY OF GALAX... NORTHWESTERN SURRY...SOUTHEASTERN GRAYSON
AND CARROLL COUNTIES...

AT 347 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR PIPERS GAP...OR 6 MILES SOUTHEAST OF GALAX CITY...MOVING
NORTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  GALAX CITY...
  PIPERS GAP...
  WOODLAWN...
  FANCY GAP...
  GLADESBORO...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT SATURDAY
EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR WEST CENTRAL VIRGINIA AND SOUTHEAST WEST
VIRGINIA.

&&

LAT...LON 3658 8093 3662 8098 3667 8093 3684 8069
      3669 8051 3666 8057 3666 8059 3664 8060
      3651 8083
TIME...MOT...LOC 1949Z 231DEG 26KT 3660 8084

$$

DS

561 
WWUS51 KRNK 242018
SVSRNK

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

NCC171-VAC077-640-242028-
/O.CAN.KRNK.SV.W.0041.000000T0000Z-120324T2030Z/
SURRY NC-CITY OF GALAX VA-GRAYSON VA-
418 PM EDT SAT MAR 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR THE CITY OF GALAX...
NORTHWESTERN SURRY AND SOUTHEASTERN GRAYSON COUNTIES IS CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS EXITED THE COUNTY. 
THEREFORE...THE WARNING HAS BEEN CANCELLED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT SATURDAY
EVENING FOR NORTHWEST NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR WEST CENTRAL VIRGINIA AND SOUTHEAST WEST
VIRGINIA.

&&

LAT...LON 3667 8080 3673 8073 3684 8069 3669 8051
      3666 8057 3666 8059 3664 8060 3662 8077
TIME...MOT...LOC 2018Z 231DEG 26KT 3672 8062

$$

VAC035-242030-
/O.CON.KRNK.SV.W.0041.000000T0000Z-120324T2030Z/
CARROLL VA-
418 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR EASTERN CARROLL COUNTY...

AT 417 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR GLADESBORO...OR NEAR FANCY GAP...MOVING NORTHEAST AT 30
MPH.

LOCATIONS IMPACTED INCLUDE...
  GLADESBORO...

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 SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT SATURDAY
EVENING FOR NORTHWEST NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR WEST CENTRAL VIRGINIA AND SOUTHEAST WEST
VIRGINIA.

&&

LAT...LON 3667 8080 3673 8073 3684 8069 3669 8051
      3666 8057 3666 8059 3664 8060 3662 8077
TIME...MOT...LOC 2018Z 231DEG 26KT 3672 8062

$$

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, 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, 7:39 PM EDT	Severe Thunderstorm Warning	RNK	Caswell	81 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.