Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 229, NWS Columbia, SC

August 9, 20128 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Aug 9, 2012, 7:57 PM EDT for 8 counties in South Carolina. It was in force for 48 min. 3 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: Aug 9, 2012, 7:57 PM EDT (23:57 UTC)
Expired: Aug 9, 2012, 8:45 PM EDT
In force: 48 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Aiken County, SC, Barnwell County, SC, Calhoun County, SC, Edgefield County, SC, Lexington County, SC, Newberry County, SC, Orangeburg County, SC, Saluda County, SC

The radar

The Columbia radar (KCAE), 32 km from the middle of the area, began a volume at 23:58 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
Aug 9, 8:18 PM EDT	TSTM WND DMG	Saluda, SC	SALUDA COUNTY DISPATCH REPORTED TREES DOWN ON MARIACHI DRIVE, ON OLD CHAPPELLS FERRY ROAD, AND ON HENLEY ROAD.
Aug 9, 8:28 PM EDT	TSTM WND GST	3 Sse South Congaree, SC	TREES DOWN AT FOREST DR AND FISH HATCHERY RD
Aug 9, 8:50 PM EDT	TSTM WND DMG	2 Ene Lexington, SC	TREES DOWN ON MINERAL SPRINGS RD AT SHOAL CREEK RD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 12.0 hours before the alert went out and 172 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: 957 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 723 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 18 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.

579 
WUUS52 KCAE 092357
SVRCAE
SCC003-011-017-037-063-071-075-081-100045-
/O.NEW.KCAE.SV.W.0229.120809T2357Z-120810T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
757 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN EDGEFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHERN NEWBERRY COUNTY IN CENTRAL SOUTH CAROLINA
  SALUDA COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHEASTERN AIKEN COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHWESTERN CALHOUN COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHWESTERN ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHEASTERN BARNWELL COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 845 PM EDT

* AT 754 PM EDT...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 9 MILES WEST OF JOHNSTON TO 26 MILES SOUTH OF GASTON...OR
  ALONG A LINE EXTENDING FROM 23 MILES NORTH OF BELVEDERE TO 12 MILES
  NORTHWEST OF DENMARK...AND MOVING NORTHEAST AT 35 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE SPRINGDALE...SOUTH
  CONGAREE...SALUDA...RIDGE SPRING...RED BANK...PROSPERITY...PINE
  RIDGE...OAK GROVE...NEWBERRY...LEXINGTON...LEESVILLE...JOHNSTON...
  GASTON AND BATESBURG

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 3394 8209 3398 8200 3413 8188 3421 8195
      3428 8191 3440 8176 3390 8101 3389 8102
      3385 8098 3383 8092 3381 8091 3381 8088
      3377 8081 3340 8114 3344 8122 3338 8122
      3355 8158 3391 8211
TIME...MOT...LOC 2357Z 218DEG 34KT 3389 8195 3348 8124

$$

HC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 9:01 PM EDT	Areal Flood Advisory	CAE	Chesterfield	119 min
Aug 8, 11:20 PM EDT	Special Weather Statement	CAE	Calhoun, Clarendon, Orangeburg, Sumter	55 min
Aug 9, 6:29 PM EDT	Severe Thunderstorm Warning	CAE	Aiken	61 min
Aug 9, 6:41 PM EDT	Severe Thunderstorm Warning	CAE	Newberry, Saluda	64 min
Aug 9, 7:00 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Newberry	45 min
Aug 9, 7:15 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield, McCormick	45 min
Aug 9, 7:31 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Bamberg, Barnwell, Orangeburg	59 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2012 Every severe thunderstorm warning in 2012

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.