Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 3, NWS Columbia, SC

February 28, 20115 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Feb 28, 2011, 6:45 PM EST for 5 counties in South Carolina. It was in force for 45 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, 6:45 PM EST (23:45 UTC)
Expired
Feb 28, 2011, 7:30 PM EST
In force
45 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon

Counties Fairfield County, SC, Lancaster County, SC, Lexington County, SC, Newberry County, SC, Saluda County, SC

The radar

The Columbia radar (KCAE), 46 km from the middle of the area, began a volume at 23:46 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

TimeReportWhereRemark
Feb 28, 7:18 PM ESTTSTM WND DMG2 N Silverstreet, SCA ROOF RIPPED OFF AN OUT BUILDING AND NUMEROUS TREES DOWN ALONG TRINITY CHURCH RD
Feb 28, 7:18 PM ESTTSTM WND DMGMitford, SCTREES DOWN
Feb 28, 7:24 PM ESTTSTM WND DMG8 Nw Saluda, SCTREES DOWN
Feb 28, 7:24 PM ESTTORNADO1 Nne Silverstreet, SCEF1 TORNADO NEAR INTERSECTION OF SPEARMAN RD AND TRINITY SPRINGS RD ONE MILE NNE OF SILVERSTREET.
Feb 28, 7:30 PM ESTTSTM WND DMGWinnsboro, SCTREES DOWN
Feb 28, 7:30 PM ESTTORNADO2 S Prosperity, SCCORRECTED LOCATION AND TIME. REPORT OF POSSIBLE TORNADO TOUCHDOWN. SHERIFF DEPT EN ROUTE TO CHECK IT OUT.

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.

IssuedProductOfficeLasted
Feb 28, 5:04 PM ESTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 11.8 hours before the alert went out and 202 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, Charleston AFB, SC at 12:00Z on 2011-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2011-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.1939587897Sfc1 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
3 J/kg
Mixed-layer CIN
-301 J/kg
Mixed-layer LCL
865 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

047 
WUUS52 KCAE 282345
SVRCAE
SCC039-057-063-071-081-010030-
/O.NEW.KCAE.SV.W.0003.110228T2345Z-110301T0030Z/

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

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FAIRFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHERN LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHWESTERN LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA
  NEWBERRY COUNTY IN CENTRAL SOUTH CAROLINA
  SALUDA COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 730 PM EST

* AT 641 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 26 MILES NORTH OF WINNSBORO TO 37 MILES WEST OF SALUDA...OR
  ALONG A LINE EXTENDING FROM CHESTER TO ABBEVILLE...AND MOVING EAST
  AT 55 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE WINNSBORO...
  WHITMIRE...SALUDA...RIDGE SPRING...PROSPERITY...NEWBERRY AND HEATH
  SPRINGS

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 3459 8059 3446 8087 3443 8085 3420 8122
      3424 8132 3421 8134 3414 8131 3382 8168
      3389 8187 3398 8189 3396 8200 3413 8186
      3419 8193 3429 8188 3453 8163 3444 8153
      3449 8142 3457 8142 3454 8088 3470 8086
TIME...MOT...LOC 2344Z 290DEG 47KT 3473 8114 3416 8234

$$

HC

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 27, 8:25 PM ESTLake Wind AdvisoryCAEAiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more40 hr
Feb 28, 6:19 PM ESTSevere Thunderstorm WarningCAELancaster56 min
Feb 28, 6:28 PM ESTSevere Thunderstorm WarningCAEMcCormick62 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011Every 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.