Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 20, NWS Columbia, SC

April 5, 201113 counties in South Carolina; Burke County, Georgia

NWS Columbia, SC issued this severe thunderstorm warning at Apr 5, 2011, 4:00 AM EDT for 13 counties in South Carolina; Burke County, Georgia. It was in force for 60 min. 15 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: Apr 5, 2011, 4:00 AM EDT (08:00 UTC)
Expired: Apr 5, 2011, 5:00 AM EDT
In force: 60 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Burke County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chesterfield County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 38 km from the middle of the area, began a volume at 08:02 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
Apr 5, 4:03 AM EDT	TSTM WND GST 60	4 Ene Cayce, SC	THE ASOS AT COLUMBIA OWENS FIELD AIRPORT REPORTED A WIND GUST OF 52 KNOTS OR 60 MPH.
Apr 5, 4:10 AM EDT	TSTM WND DMG	5 Ese Ridgeway, SC	HIGHWAY PATROL REPORTED TREES DOWN AT CENTERVILLE RD AND SC HWY 34.
Apr 5, 4:10 AM EDT	TSTM WND DMG	Columbia, SC	TREES DOWN ON SEVERAL HOMES IN COLUMBIA.
Apr 5, 4:10 AM EDT	TSTM WND GST 51	7 Nw Camden, SC	NWS WIND EQUIPMENT AT THE LAKE WATEREE DAM REPORTED A WIND GUST OF 51 MPH.
Apr 5, 4:15 AM EDT	TSTM WND DMG	Gaston, SC	LEXINGTON COUNTY SHERIFF REPORTED NUMEROUS TREES AND POWER LINES DOWN IN GASTON AREA.
Apr 5, 4:20 AM EDT	TSTM WND DMG	Columbia, SC	RICHLAND COUNTY SHERIFF REPORTED NUMEROUS TREES AND POWER LINES DOWN IN COLUMBIA AND DENTSVILLE.
Apr 5, 4:20 AM EDT	TSTM WND DMG	Lugoff, SC	NUMEROUS TREES AND POWERLINES DOWN IN LUGOFF.
Apr 5, 4:22 AM EDT	TSTM WND GST 52	10 Sse Columbia, SC	MCENTIRE AIR NATIONAL GUARD STATION REPORTED A WIND GUST OF 52 MPH.
Apr 5, 4:30 AM EDT	TSTM WND DMG	Camden, SC	NUMEROUS TREES AND POWER LINES DOWN IN CAMDEN.
Apr 5, 4:32 AM EDT	TSTM WND DMG	10 Nw St. Matthews, SC	CALHOUN COUNTY SHERIFF REPORTED POWER LINES DOWN WITH OUTAGES IN SANDY RUN AREA.
Apr 5, 4:40 AM EDT	TSTM WND DMG	Blackville, SC	NUMEROUS TREES DOWN IN THE CITIES OF BLACKVILLE AND BARNWELL.
Apr 5, 4:44 AM EDT	TSTM WND DMG	Orangeburg, SC	ORANGEBURG SHERIFF REPORTED TREE DOWN ON HWY 601 BY THE HOSPITAL.
Apr 5, 4:53 AM EDT	TSTM WND DMG	Bamberg, SC	HIGHWAY PATROL REPORTED TREES DOWN IN BAMBERG.
Apr 5, 4:54 AM EDT	TSTM WND GST 55	4 Ssw Brookdale, SC	ASOS EQUIPMENT AT THE ORANGEBURG COUNTY AIRPORT MEASURED A WIND GUST OF 55 MPH.
Apr 5, 4:54 AM EDT	TSTM WND GST 55	4 Ssw Brookdale, SC	ASOS EQUIPMENT AT THE ORANGEBURG COUNTY AIRPORT MEASURED A WIND GUST OF 56 MPH.

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
Apr 5, 12:48 AM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 8.0 hours before the alert went out and 126 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: 106 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 1161 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

308 
WUUS52 KCAE 050800
SVRCAE
GAC033-SCC003-009-011-017-025-039-055-057-061-063-075-079-085-050900-
/O.NEW.KCAE.SV.W.0020.110405T0800Z-110405T0900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
400 AM EDT TUE APR 5 2011

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BURKE COUNTY IN EAST CENTRAL GEORGIA
  BAMBERG COUNTY IN CENTRAL SOUTH CAROLINA
  BARNWELL COUNTY IN CENTRAL SOUTH CAROLINA
  CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  EASTERN FAIRFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  KERSHAW COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHEASTERN LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA
  LEE COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHEASTERN LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA
  RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHEASTERN AIKEN COUNTY IN CENTRAL SOUTH CAROLINA
  CALHOUN COUNTY IN CENTRAL SOUTH CAROLINA
  WESTERN SUMTER COUNTY IN CENTRAL SOUTH CAROLINA
  WESTERN ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 500 AM EDT

* AT 358 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS.  THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM 6 MILES NORTHEAST OF CHERAW TO 10 MILES NORTH
  OF CAMDEN TO 21 MILES SOUTHWEST OF SARDIS...OR ALONG A LINE
  EXTENDING FROM 6 MILES NORTHEAST OF CHERAW TO 10 MILES NORTH OF
  CAMDEN TO MILLEN...AND MOVING EAST AT 50 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE SAVANNAH RIVER SITE...
  FIVE POINTS...CHESTERFIELD...FORT JACKSON...SARDIS...WOODFIELDS...
  WILLISTON...WEST COLUMBIA...ST. MATTHEWS...ST. ANDREWS...
  SPRINGDALE...SOUTH CONGAREE...PINE RIDGE...PAGELAND...ORANGEBURG...
  OAK GROVE...LUGOFF...KERSHAW...GASTON...FOREST ACRES...EASTOVER...
  DENTSVILLE...DENMARK...COLUMBIA...CHERAW...CAYCE...CAMDEN...
  BROOKDALE...BLACKVILLE...BISHOPVILLE...BARNWELL...BAMBERG...ARCADIA
  LAKES AND OAKLAND

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.

LAT...LON 3454 7982 3438 8027 3437 8028 3431 8024
      3436 8017 3423 8012 3398 8038 3303 8107
      3312 8119 3310 8137 3315 8154 3310 8161
      3304 8155 3295 8169 3291 8204 3292 8204
      3481 8048 3481 7993 3469 7987 3463 7979
TIME...MOT...LOC 0800Z 271DEG 48KT 3475 7969 3440 8049
          3278 8192

$$

SJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 1:21 AM EDT	Severe Thunderstorm Warning	CAE	Edgefield, Fairfield, McCormick, Newberry, Saluda	54 min
Apr 5, 1:55 AM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Lancaster	50 min
Apr 5, 2:21 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Chesterfield, Edgefield, Fairfield, Kershaw, Lancaster and 5 more	54 min
Apr 5, 3:14 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Barnwell, Chesterfield, Edgefield, Fairfield, Kershaw and 5 more	61 min
Apr 5, 4:57 AM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Calhoun, Clarendon, Lee, Orangeburg, Richland and 1 more	63 min
Apr 5, 3:11 PM EDT	Frost Advisory	CAE	Chesterfield, Edgefield, Fairfield, Kershaw, Lee, McCormick and 2 more	18 hr

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011 Severe Thunderstorm Warnings in Georgia, 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.