Alert archive / North Carolina / Tornado Warnings in 2012

Tornado Warning 1, NWS Blacksburg, VA

February 24, 2012Caswell County, North Carolina

NWS Blacksburg, VA issued this tornado warning at Feb 24, 2012, 4:07 PM EST for Caswell County, North Carolina. It was in force for 13 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, 4:07 PM EST (21:07 UTC)
Expired
Feb 24, 2012, 4:20 PM EST
In force
13 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon

County Caswell County, NC

The radar

The Raleigh/Durham radar (KRAX), 107 km from the middle of the area, began a volume at 21:06 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.1 hours before the alert went out and 64 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2012-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 150 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2012-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 271 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
150 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
742 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
271 m²/s²
0-3 km storm-relative helicity
345 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

929 
WFUS51 KRNK 242107
TORRNK
NCC033-242130-
/O.NEW.KRNK.TO.W.0001.120224T2107Z-120224T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
407 PM EST FRI FEB 24 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL CASWELL COUNTY IN NORTH CENTRAL NORTH CAROLINA

* UNTIL 430 PM EST.

* AT 403 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  YANCEYVILLE...MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  YANCEYVILLE...
  TOPNOT...
  LEASBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING  
DESTRUCTIVE STRAIGHT LINE WINDS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

WHEN IT IS SAFE TO DO SO...PLEASE RELAY YOUR SEVERE WEATHER REPORTS
TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE AT...1...8 6
6...2 1 5...4 3 2 4.

&&

LAT...LON 3635 7938 3641 7939 3646 7914 3633 7914
TIME...MOT...LOC 2107Z 266DEG 40KT 3638 7931

$$

WP
2 follow-up statements
754 
WWUS51 KRNK 242115
SVSRNK

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

NCC033-242130-
/O.CON.KRNK.TO.W.0001.000000T0000Z-120224T2130Z/
CASWELL NC-
415 PM EST FRI FEB 24 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM EST FOR EASTERN
CASWELL COUNTY...

AT 413 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR LEASBURG...OR 9
MILES EAST OF YANCEYVILLE...MOVING EAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  LEASBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING  
DESTRUCTIVE STRAIGHT LINE WINDS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3637 7922 3643 7921 3646 7914 3636 7915
TIME...MOT...LOC 2115Z 260DEG 52KT 3641 7914

$$

WP
468 
WWUS51 KRNK 242120
SVSRNK

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

NCC033-242130-
/O.CAN.KRNK.TO.W.0001.000000T0000Z-120224T2130Z/
CASWELL NC-
420 PM EST FRI FEB 24 2012

...THE TORNADO WARNING FOR EASTERN CASWELL COUNTY IS CANCELLED...

THE TORNADO THREAT FOR THE WARNED AREA HAS ENDED. THE THUNDERSTORM
PRODUCING THE TORNADO HAS WEAKENED AND MOVED OUT OF THE WARNING AREA.

A SEVERE THUNDERSTOM WARNING REMAINS IN EFFECT FOR EASTERN CASWELL 
COUNTY UNTIL 445 PM. DAMAGING STRAIGHT LINE WINDS ARE STILL EXPECTED 
OVER EASTERN CASWELL COUNTY.

STAY INDOORS AWAY FROM WINDOWS.

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

LAT...LON 3637 7922 3643 7921 3646 7914 3636 7915
TIME...MOT...LOC 2120Z 260DEG 52KT 3642 7905

$$

WP

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 24, 12:41 PM ESTSevere Thunderstorm WarningRNKStokes, Surry34 min
Feb 24, 2:30 PM ESTSpecial Weather StatementRNKStokes, Yadkin45 min
Feb 24, 3:04 PM ESTSpecial Weather StatementRNKRockingham41 min
Feb 24, 3:44 PM ESTFire Weather WatchRNKAlleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more14 hr
Feb 24, 3:45 PM ESTSpecial Weather StatementRNKCaswell45 min
Feb 24, 3:49 PM ESTSevere Thunderstorm WarningRNKCaswell, Rockingham56 min

Nearby

Tornado Warnings in North Carolina, 2012Every tornado warning in 2012Tornadoes 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.