Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 6, NWS Columbia, SC

February 28, 20119 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Feb 28, 2011, 7:28 PM EST for 9 counties in South Carolina. It was in force for 62 min. 6 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 28, 2011, 7:28 PM EST (00:28 UTC)
Expired: Feb 28, 2011, 8:30 PM EST
In force: 62 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Aiken County, SC, Chesterfield County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster County, SC, Lexington County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC

The radar

The Columbia radar (KCAE), 28 km from the middle of the area, began a volume at 00:27 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 28, 7:30 PM EST	TSTM WND DMG	Winnsboro, SC	TREES DOWN
Feb 28, 7:42 PM EST	TSTM WND DMG	5 E Saluda, SC	TREES DOWN
Feb 28, 7:42 PM EST	TSTM WND DMG	5 S Saluda, SC	TREES DOWN
Feb 28, 7:42 PM EST	TORNADO	1 E Little Mountain, SC	REPORT OF POSSIBLE TORNADO TOUCHDOWN. SHERIFF DEPT EN ROUTE TO CHECK IT OUT.
Feb 28, 7:50 PM EST	TSTM WND DMG	1 Wsw Minton Mill, SC	TREES DOWN THROUGHOUT COUNTY
Feb 28, 8:15 PM EST	TSTM WND DMG	West Columbia, SC	PIECES OF SHEET METAL BLEW OFF A BUILDING AND DAMAGED A VEHICLE.

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 28, 5:04 PM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 0.5 hours before the alert went out and 157 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: 22 J/kg
Mixed-layer CIN: -366 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

779 
WUUS52 KCAE 010028
SVRCAE
SCC003-025-039-055-057-063-071-079-081-010130-
/O.NEW.KCAE.SV.W.0006.110301T0028Z-110301T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
728 PM EST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  FAIRFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  KERSHAW COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHWESTERN LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA
  LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHEASTERN NEWBERRY COUNTY IN CENTRAL SOUTH CAROLINA
  RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA
  SALUDA COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHERN AIKEN COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 830 PM EST

* AT 723 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 19 MILES NORTHEAST OF WINNSBORO TO 6 MILES NORTHEAST OF       
  SALUDA AND MOVING EAST AT 55 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE FIVE POINTS...FORT
  JACKSON...WOODFIELDS...WINNSBORO...WEST COLUMBIA...ST. ANDREWS...
  SPRINGDALE...SOUTH CONGAREE...SALUDA...RIDGE SPRING...RED BANK...
  PINE RIDGE...OAK GROVE...LUGOFF...LEXINGTON...LEESVILLE...IRMO...
  FOREST ACRES...DENTSVILLE...COLUMBIA...CAYCE...CAMDEN...BATESBURG
  AND ARCADIA LAKES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EST
MONDAY EVENING FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3446 8011 3434 8036 3430 8036 3428 8044
      3423 8043 3394 8082 3386 8100 3388 8103
      3384 8104 3373 8129 3381 8165 3388 8187
      3396 8189 3457 8085
TIME...MOT...LOC 0027Z 275DEG 51KT 3457 8079 3404 8162

$$

HC

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 7:13 PM EST	Tornado Warning	CAE	Fairfield, Lexington, Newberry, Richland, Saluda	47 min
Feb 28, 7:18 PM EST	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster	57 min
Feb 28, 7:24 PM EST	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	29 min
Feb 28, 8:11 PM EST	Severe Thunderstorm Warning	CAE	Chesterfield	23 min
Feb 28, 8:49 PM EST	Severe Thunderstorm Warning	CAE	Clarendon, Lee, Sumter	29 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011 Every severe thunderstorm warning in 2011

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.