Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 18, NWS Columbia, SC

April 5, 201111 counties in South Carolina; 5 counties in Georgia

NWS Columbia, SC issued this severe thunderstorm warning at Apr 5, 2011, 2:21 AM EDT for 11 counties in South Carolina; 5 counties in Georgia. It was in force for 54 min. 16 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, 2:21 AM EDT (06:21 UTC)
Expired: Apr 5, 2011, 3:15 AM EDT
In force: 54 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Burke County, GA, Columbia County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Aiken County, SC, Chesterfield County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC

The radar

The Columbia radar (KCAE), 50 km from the middle of the area, began a volume at 06:20 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, 2:23 AM EDT	TSTM WND DMG	Lancaster, SC	TREE DOWN ON HOUSE IN LANCASTER.
Apr 5, 2:26 AM EDT	TSTM WND DMG	10 Sw Lancaster, SC	POWER LINES DOWN ON HWY 200 AREA NR GREAT FALLS.
Apr 5, 2:30 AM EDT	TSTM WND DMG	3 S Lancaster, SC	SHERIFF DISPATCH REPORTED NUMEROUS POWER OUTAGES IN THE LANCASTER AREA AND A TREE DOWN ON GOLF COURSE ROAD.
Apr 5, 2:30 AM EDT	TSTM WND DMG	Thomson, GA	SHERIFF DISPATCH REPORTED NUMEROUS TREES AND POWER LINES DOWN ACROSS MCDUFFIE COUNTY.
Apr 5, 2:50 AM EDT	TSTM WND DMG	Batesburg, SC	NUMEROUS TREES AND POWER LINES DOWN IN BATESBURG.
Apr 5, 2:50 AM EDT	TSTM WND DMG	Grovetown, GA	TREES AND POWER LINES DOWN IN GROVETOWN.
Apr 5, 2:55 AM EDT	TSTM WND DMG	Evans, GA	TREES AND POWERLINES DOWN IN EVANS.
Apr 5, 3:00 AM EDT	TSTM WND DMG	Edgefield, SC	FIRE DEPT SUBSTATION HAD OVERHEAD DOORS BLOWN IN ON TRUCKS. TIME ESTIMATED FROM RADAR.
Apr 5, 3:00 AM EDT	TSTM WND GST 50	11 Nnw Evans, SC	NWS WIND EQUIPMENT ON THE DAM AT LAKE THURMOND REPORTED A WIND GUST OF 50 MPH.
Apr 5, 3:05 AM EDT	TSTM WND DMG	Edgefield, SC	EDGEFIELD SHERIFF REPORTED NUMEROUS TREES ACROSS COUNTY.
Apr 5, 3:07 AM EDT	TSTM WND DMG	Augusta, GA	NUMEROUS LIMBS AND POWER LINES DOWN MARTIN TOWN ROAD AREA.
Apr 5, 3:11 AM EDT	TSTM WND DMG	Saluda, SC	TREES DOWN ON HOME IN SALUDA.
Apr 5, 3:15 AM EDT	TSTM WND DMG	Hephzibah, GA	TREE FEEL ON HOUSE ON HOLDEN STREET 8 PEOPLE IN HOUSE WITH NO INJURIES. NUMEROUD TREES AND POWER LINES DOWN. TIME ESTIMATED FROM RADAR.
Apr 5, 3:21 AM EDT	TSTM WND DMG	Augusta, GA	RICHMOND COUNTY SHERIFF NUMEROUS TREES AND POWER LINES DOWN IN THE AUGUSTA AND HEPHZIBAH AREAS.
Apr 5, 3:23 AM EDT	TSTM WND DMG	Augusta, GA	TREE LIMBS DOWN INTERSECTION I-20AND BOBBY JONES EXPRESSWAY.
Apr 5, 3:25 AM EDT	TSTM WND DMG	Waynesboro, GA	DAMAGE TO TWO MANUFACTURING PLANTS ON THE NORTH SIDE OF TOWN. NUMEROUS TREES DOWN IN THE AREA.

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, 6.4 hours before the alert went out and 200 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.

827 
WUUS52 KCAE 050621
SVRCAE
GAC033-073-181-189-245-SCC003-025-037-039-055-057-063-065-071-079-
081-050715-
/O.NEW.KCAE.SV.W.0018.110405T0621Z-110405T0715Z/

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

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RICHMOND COUNTY IN EAST CENTRAL GEORGIA
  MCDUFFIE COUNTY IN EAST CENTRAL GEORGIA
  LINCOLN COUNTY IN EAST CENTRAL GEORGIA
  WESTERN BURKE COUNTY IN EAST CENTRAL GEORGIA
  COLUMBIA COUNTY IN EAST CENTRAL GEORGIA
  CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  EDGEFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  FAIRFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  KERSHAW COUNTY IN CENTRAL SOUTH CAROLINA
  LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA
  LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA
  MCCORMICK COUNTY IN CENTRAL SOUTH CAROLINA
  NEWBERRY COUNTY IN CENTRAL SOUTH CAROLINA
  RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA
  SALUDA COUNTY IN CENTRAL SOUTH CAROLINA
  AIKEN COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 315 AM EDT

* AT 220 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS.  THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM 6 MILES NORTHWEST OF IRWIN TO WHITMIRE TO 24
  MILES SOUTHWEST OF THOMSON...OR ALONG A LINE EXTENDING FROM 7 MILES
  NORTHWEST OF LANCASTER TO 13 MILES SOUTH OF UNION TO 24 MILES
  SOUTHWEST OF THOMSON...AND MOVING EAST AT 50 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE FIVE POINTS...
  CHESTERFIELD...FORT JACKSON...WAYNESBORO...THOMSON...MARTINEZ...
  LINCOLNTON...HEPHZIBAH...HARLEM...GROVETOWN...FORT GORDON...
  EVANS...AUGUSTA...WOODFIELDS...WINNSBORO...WHITMIRE...WEST
  COLUMBIA...ST. ANDREWS...SPRINGDALE...SOUTH CONGAREE...SALUDA...
  RIDGE SPRING...RED BANK...PROSPERITY...PINE RIDGE...PAGELAND...OAK
  GROVE...NORTH AUGUSTA...NEWBERRY...NEW ELLENTON...MCCORMICK...
  LUGOFF...LEXINGTON...LEESVILLE...LANCASTER...KERSHAW...JOHNSTON...
  JACKSON...IRWIN...IRMO...HEATH SPRINGS...GASTON...FOREST ACRES...
  ELGIN...EDGEFIELD...DENTSVILLE...COLUMBIA...CLEARWATER...CHERAW...
  CAYCE...CAMDEN...BELVEDERE...BATESBURG...ARCADIA LAKES...AIKEN AND
  GLOVERVILLE

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT TUESDAY MORNING
FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3322 8223 3334 8250 3363 8262 3387 8258
      3406 8232 3397 8229 3396 8201 3413 8186
      3429 8188 3453 8163 3444 8153 3457 8142
      3454 8088 3477 8088 3482 8072 3481 7993
      3467 7984 3388 8103 3282 8228
TIME...MOT...LOC 0621Z 270DEG 47KT 3476 8073 3454 8153
          3326 8267

$$

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, 3:14 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Barnwell, Chesterfield, Edgefield, Fairfield, Kershaw and 5 more	61 min
Apr 5, 4:00 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Fairfield and 7 more	60 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.