Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 210, NWS Columbia, SC

July 31, 20124 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jul 31, 2012, 2:07 PM EDT for 4 counties in South Carolina. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 31, 2012, 2:07 PM EDT (18:07 UTC)
Expired
Jul 31, 2012, 2:42 PM EDT
In force
35 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon

Counties Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 52 km from the middle of the area, began a volume at 18:10 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.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 6.1 hours before the alert went out and 133 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 2012-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 873 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 2012-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.193958Sfc1 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
873 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
605 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
46 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.

213 
WUUS52 KCAE 311807
SVRCAE
SCC003-009-011-075-311900-
/O.NEW.KCAE.SV.W.0210.120731T1807Z-120731T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
207 PM EDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BAMBERG COUNTY IN CENTRAL SOUTH CAROLINA
  EASTERN AIKEN COUNTY IN CENTRAL SOUTH CAROLINA
  WESTERN ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHEASTERN BARNWELL COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 300 PM EDT

* AT 205 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR BLACKVILLE...OR 8 MILES
  NORTHWEST OF DENMARK...AND MOVING EAST AT 10 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE WILLISTON...
  ORANGEBURG...DENMARK...BLACKVILLE AND BAMBERG

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 3368 8147 3351 8085 3338 8091 3327 8102
      3344 8171
TIME...MOT...LOC 1807Z 254DEG 7KT 3341 8123

$$

HC
2 follow-up statements
616 
WWUS52 KCAE 311829
SVSCAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
229 PM EDT TUE JUL 31 2012

SCC003-009-011-075-311900-
/O.CON.KCAE.SV.W.0210.000000T0000Z-120731T1900Z/
BAMBERG SC-AIKEN SC-ORANGEBURG SC-BARNWELL SC-
229 PM EDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR BARNWELL...ORANGEBURG...AIKEN AND BAMBERG COUNTIES...

AT 227 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM WINDSOR TO NORWAY...MOVING EAST AT 10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SPRINGFIELD...SALLEY...PERRY...ORANGEBURG...NEESES...LIVINGSTON...
CORDOVA AND COPE

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1...8 7
7...6 3 3...6 7 7 2.

LAT...LON 3330 8109 3344 8163 3368 8146 3351 8085
      3338 8091
TIME...MOT...LOC 1829Z 254DEG 7KT 3350 8148 3342 8114

$$

HC
509 
WWUS52 KCAE 311842
SVSCAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
242 PM EDT TUE JUL 31 2012

SCC003-009-011-075-311852-
/O.CAN.KCAE.SV.W.0210.000000T0000Z-120731T1900Z/
BAMBERG SC-AIKEN SC-ORANGEBURG SC-BARNWELL SC-
242 PM EDT TUE JUL 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR BARNWELL...ORANGEBURG...AIKEN 
AND BAMBERG COUNTIES HAS BEEN CANCELLED...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1...8 7
7...6 3 3...6 7 7 2.

LAT...LON 3330 8109 3344 8163 3368 8146 3351 8085
      3338 8091
TIME...MOT...LOC 1842Z 254DEG 7KT 3351 8145 3343 8111

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 8:24 PM EDTSevere Thunderstorm WarningCAEAiken23 min
Jul 31, 1:59 PM EDTSpecial Weather StatementCAEBarnwell61 min
Jul 31, 4:35 PM EDTAreal Flood AdvisoryCAELexington, Richland55 min
Jul 31, 5:02 PM EDTFlash Flood WarningCAELexington, Richland34 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.