Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 4, NWS Columbia, SC

February 28, 2011Chesterfield County, Kershaw County, Lancaster County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Feb 28, 2011, 7:18 PM EST for Chesterfield County, Kershaw County, Lancaster County, South Carolina. It was in force for 57 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 28, 2011, 7:18 PM EST (00:18 UTC)
Expired: Feb 28, 2011, 8:15 PM EST
In force: 57 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Chesterfield County, SC, Kershaw County, SC, Lancaster County, SC

The radar

The Columbia radar (KCAE), 121 km from the middle of the area, began a volume at 00:18 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, 7:50 PM EST	TSTM WND DMG	1 Wsw Minton Mill, SC	TREES DOWN THROUGHOUT COUNTY
Feb 28, 8:14 PM EST	HAIL 0.88	Cheraw, SC

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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.3 hours before the alert went out and 164 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 611 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: -430 m²/s²
0-3 km storm-relative helicity: -326 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.

725 
WUUS52 KCAE 010018
SVRCAE
SCC025-055-057-010115-
/O.NEW.KCAE.SV.W.0004.110301T0018Z-110301T0115Z/

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

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHEASTERN KERSHAW COUNTY IN CENTRAL SOUTH CAROLINA
  LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 815 PM EST

* AT 713 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 NEAR LANCASTER...AND MOVING EAST
  AT 55 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE CHESTERFIELD...
  PAGELAND...LANCASTER...KERSHAW...IRWIN...HEATH SPRINGS...ELGIN AND
  CHERAW

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 3460 7981 3454 7982 3449 7989 3450 7999
      3444 8013 3454 8087 3465 8090 3482 8065
      3481 7993 3469 7987 3466 7981 3463 7979
      3460 7979
TIME...MOT...LOC 0018Z 276DEG 51KT 3472 8068

$$

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, 7:24 PM EST	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	29 min
Feb 28, 7:28 PM EST	Severe Thunderstorm Warning	CAE	Aiken, Chesterfield, Fairfield, Kershaw, Lancaster, Lexington and 3 more	62 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.