Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 34, NWS Blacksburg, VA

March 24, 2012Alleghany County, Surry County, North Carolina; Carroll County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Mar 24, 2012, 2:00 PM EDT for Alleghany County, Surry County, North Carolina; Carroll County, Virginia. It was in force for 60 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, 2:00 PM EDT (18:00 UTC)
Expired: Mar 24, 2012, 3:00 PM EDT
In force: 60 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Alleghany County, NC, Surry County, NC, Carroll County, VA

The radar

The Roanoke radar (KFCX), 77 km from the middle of the area, began a volume at 18:00 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, 2:50 PM EDT	HAIL 1	1 Ssw Cana, VA
Mar 24, 3:07 PM EDT	HAIL 1.25	Cana, 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, 6.0 hours before the alert went out and 97 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.

127 
WUUS51 KRNK 241800
SVRRNK
NCC005-171-VAC035-241900-
/O.NEW.KRNK.SV.W.0034.120324T1800Z-120324T1900Z/

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

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ALLEGHANY COUNTY IN NORTHWEST NORTH CAROLINA
  NORTHWESTERN SURRY COUNTY IN NORTH CENTRAL NORTH CAROLINA
  SOUTHERN CARROLL COUNTY IN SOUTHWEST VIRGINIA

* UNTIL 300 PM EDT.

* AT 156 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 11
  MILES SOUTHWEST OF LOW GAP...OR NEAR TRAPHILL...AND MOVING
  NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LOW GAP...
  LAMBSBURG...
  PIPERS GAP...
  CANA...

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.

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

&&

LAT...LON 3640 8096 3640 8098 3642 8101 3656 8090
      3656 8084 3660 8087 3670 8079 3663 8061
      3660 8063 3658 8061 3636 8091 3636 8092
TIME...MOT...LOC 1801Z 219DEG 19KT 3641 8093

$$

DS

2 follow-up statements

505 
WWUS51 KRNK 241815
SVSRNK

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

NCC005-241825-
/O.CAN.KRNK.SV.W.0034.000000T0000Z-120324T1900Z/
ALLEGHANY NC-
215 PM EDT SAT MAR 24 2012

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3648 8094 3656 8089 3656 8084 3659 8087
      3661 8087 3670 8079 3663 8061 3659 8064
      3651 8080 3644 8089
TIME...MOT...LOC 1815Z 212DEG 22KT 3649 8087

$$

NCC171-VAC035-241900-
/O.CON.KRNK.SV.W.0034.000000T0000Z-120324T1900Z/
SURRY NC-CARROLL VA-
215 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTHWESTERN SURRY AND SOUTHERN CARROLL COUNTIES...

AT 213 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR LOW GAP...OR 6 MILES WEST OF BOTTOM...MOVING NORTHEAST
AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  LOW GAP...
  LAMBSBURG...
  CANA...
  FANCY GAP...

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.

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

&&

LAT...LON 3648 8094 3656 8089 3656 8084 3659 8087
      3661 8087 3670 8079 3663 8061 3659 8064
      3651 8080 3644 8089
TIME...MOT...LOC 1815Z 212DEG 22KT 3649 8087

$$

DS

386 
WWUS51 KRNK 241833
SVSRNK

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

NCC171-VAC035-241900-
/O.CON.KRNK.SV.W.0034.000000T0000Z-120324T1900Z/
SURRY NC-CARROLL VA-
233 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTHERN SURRY AND SOUTHERN CARROLL COUNTIES...

AT 230 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 LAMBSBURG...OR 6 MILES
NORTH OF BOTTOM...MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  LAMBSBURG...
  CANA...
  FANCY GAP...

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3660 8087 3661 8087 3670 8079 3663 8061
      3659 8064 3651 8081
TIME...MOT...LOC 1833Z 212DEG 22KT 3659 8077

$$

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, 2:34 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, 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 North Carolina, 2012 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.