Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 7, NWS Columbia, SC

February 24, 20127 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Feb 24, 2012, 1:33 PM EST for 7 counties in South Carolina. It was in force for 42 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: Feb 24, 2012, 1:33 PM EST (18:33 UTC)
Expired: Feb 24, 2012, 2:15 PM EST
In force: 42 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Calhoun County, SC, Clarendon County, SC, Kershaw County, SC, Lee County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 70 km from the middle of the area, began a volume at 18:36 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
Feb 24, 1:51 PM EST	TORNADO	6 Wsw Pinewood, SC	EMERGENCY MANAGER AND SHERIFF REPORTED A TORNADO HAD INTERMITTENT TOUCHDOWNS FROM SPARKLEBERRY LANDING RD TO WEST AVE. ON THE SOUTHWEST SIDE OF PINEWOOD TAKING DOWN SOME TREES AND TOPS OUT OF OTHERS. THERE WAS NO STRUCTURAL DAMAGE.
Feb 24, 1:58 PM EST	HAIL 1.25	Sumter, SC	PUBLIC REPORT HALF DOLLAR SIZE HAIL

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
Feb 24, 8:48 AM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 6.6 hours before the alert went out and 110 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: 817 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 350 m²/s²
0-3 km storm-relative helicity: 365 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

520 
WUUS52 KCAE 241833
SVRCAE
SCC017-027-055-061-075-079-085-241915-
/O.NEW.KCAE.SV.W.0007.120224T1833Z-120224T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
133 PM EST FRI FEB 24 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN KERSHAW COUNTY IN CENTRAL SOUTH CAROLINA
  LEE COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHEASTERN RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA
  CALHOUN COUNTY IN CENTRAL SOUTH CAROLINA
  SUMTER COUNTY IN CENTRAL SOUTH CAROLINA
  CLARENDON COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHERN ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 215 PM EST

* AT 128 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THIS LINE WAS LOCATED 8 MILES WEST OF ST.
  MATTHEWS TO BISHOPVILLE AND MOVING EAST AT 70 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE FORT JACKSON...
  SUMTER...SUMMERTON...ST. MATTHEWS...SOUTH SUMTER...ORANGEBURG...
  MULBERRY...MILLWOOD...MANNING...ELLOREE...EASTOVER...BROOKDALE...
  BISHOPVILLE AND OAKLAND

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.

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE...TOLL FREE 1 877 6 3
3...6 7 7 2.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EST FRIDAY AFTERNOON
FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3394 7997 3389 7993 3380 7995 3377 7999
      3371 7998 3350 8009 3348 8014 3345 8013
      3343 8120 3369 8110 3376 8092 3378 8101
      3375 8104 3375 8106 3404 8096 3436 8018
      3423 8011 3420 8011 3415 8015 3399 7990
TIME...MOT...LOC 1832Z 249DEG 65KT 3372 8076

$$

SJN

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 24, 4:18 AM EST	Lake Wind Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	38 hr
Feb 24, 12:28 PM EST	Severe Thunderstorm Warning	CAE	Aiken, Edgefield	32 min
Feb 24, 1:01 PM EST	Severe Thunderstorm Warning	CAE	Aiken, Calhoun, Lexington, Orangeburg, Richland	29 min
Feb 24, 1:07 PM EST	Tornado Warning	CAE	Calhoun, Lexington	31 min
Feb 24, 1:33 PM EST	Areal Flood Advisory	CAE	Aiken, Lexington, Richland	117 min
Feb 24, 1:43 PM EST	Tornado Warning	CAE	Calhoun, Clarendon, Sumter	17 min
Feb 24, 2:59 PM EST	Areal Flood Advisory	CAE	Aiken, Edgefield, Lexington, Saluda	2 hr
Feb 24, 3:37 PM EST	Areal Flood Advisory	CAE	Aiken, Lexington, Richland	53 min
Feb 24, 5:16 PM EST	Special Weather Statement	CAE	Clarendon	29 min

Nearby

Severe Thunderstorm Warnings in South 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.