Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 6, NWS Columbia, SC

February 24, 20125 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Feb 24, 2012, 1:01 PM EST for 5 counties in South Carolina. It was in force for 29 min. 3 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, 1:01 PM EST (18:01 UTC)
Expired: Feb 24, 2012, 1:30 PM EST
In force: 29 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Aiken County, SC, Calhoun County, SC, Lexington County, SC, Orangeburg County, SC, Richland County, SC

The radar

The Columbia radar (KCAE), 36 km from the middle of the area, began a volume at 18:02 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, 1:07 PM EST	TORNADO	5 N Wagener, SC	NWS STORM SURVEY HAS CONFIRMED A TORNADO TOUCHED DOWN NEAER THE LEXINGTON/AIKEN COUNTY LINE NEAR THE INTERSECTION OF SAND DAM AND CLINE TAYLOR ROADS JUST SOUTH OF THE LEXINGTON COUNTY LINE. THE TORNADO CONTINUED MOVING EAST NORTH EAST INTO LEXINGTON COUNTY TO
Feb 24, 1:15 PM EST	TORNADO	North, SC	BROADCAST MEDIA REPORTED A TORNADO TOUCHED DOWN NEAR THE TOWN OF NORTH.
Feb 24, 1:20 PM EST	TSTM WND DMG	Woodford, SC	EMERGENCY MANAGER REPORTED TREES DOWN ALONG HWY 321 FROM WOODFORD TO NORTH FROM BOW ECHO WINDS.

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, 6.0 hours before the alert went out and 132 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.

073 
WUUS52 KCAE 241801
SVRCAE
SCC003-017-063-075-079-241830-
/O.NEW.KCAE.SV.W.0006.120224T1801Z-120224T1830Z/

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

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHEASTERN RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA
  CENTRAL AIKEN COUNTY IN CENTRAL SOUTH CAROLINA
  CALHOUN COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHWESTERN ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 130 PM EST

* AT 1258 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 13 MILES NORTHEAST OF AIKEN...
  AND MOVING EAST AT 70 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE ST. MATTHEWS...PINE
  RIDGE...NEW ELLENTON...GASTON...EASTOVER AND AIKEN

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 3362 8177 3408 8073 3377 8060 3373 8063
      3368 8057 3363 8055 3347 8129 3349 8137
      3343 8145 3338 8167
TIME...MOT...LOC 1801Z 249DEG 60KT 3366 8139

$$

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, 1:07 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, 1:33 PM EST	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Kershaw, Lee, Orangeburg, Richland and 1 more	42 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.