Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 72, NWS Columbia, SC

May 14, 2012Calhoun County, Orangeburg County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 14, 2012, 6:58 PM EDT for Calhoun County, Orangeburg County, South Carolina. It was in force for 47 min. 1 report 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: May 14, 2012, 6:58 PM EDT (22:58 UTC)
Expired: May 14, 2012, 7:45 PM EDT
In force: 47 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Calhoun County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 78 km from the middle of the area, began a volume at 23:01 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
May 14, 7:00 PM EDT	HAIL 1	3 Ese Rowesville, SC	QUARTER SIZE HAIL EAST OF ROWESVILLE.

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, 11.0 hours before the alert went out and 78 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: 518 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

509 
WUUS52 KCAE 142258
SVRCAE
SCC017-075-142345-
/O.NEW.KCAE.SV.W.0072.120514T2258Z-120514T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
658 PM EDT MON MAY 14 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CALHOUN COUNTY IN CENTRAL SOUTH CAROLINA
  EASTERN ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 745 PM EDT

* AT 651 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 BOWMAN...OR 10 MILES
  SOUTHEAST OF BROOKDALE...AND MOVING EAST AT 25 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE HOLLY HILL...ELLOREE
  AND BOWMAN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

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 3327 8048 3333 8051 3326 8064 3335 8082
      3340 8085 3351 8080 3357 8060 3356 8048
      3354 8047 3354 8045 3353 8045 3353 8046
      3352 8047 3347 8042 3326 8038
TIME...MOT...LOC 2258Z 269DEG 20KT 3340 8069

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 2:12 PM EDT	Special Weather Statement	CAE	Orangeburg	48 min
May 14, 2:25 PM EDT	Tornado Warning	CAE	Calhoun, Clarendon, Orangeburg	35 min
May 14, 3:33 PM EDT	Special Weather Statement	CAE	Clarendon	27 min
May 14, 3:37 PM EDT	Special Weather Statement	CAE	Aiken	53 min
May 14, 4:41 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Barnwell	49 min
May 14, 4:46 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Orangeburg	44 min
May 14, 5:25 PM EDT	Special Weather Statement	CAE	Lancaster	35 min
May 14, 5:26 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Orangeburg	34 min
May 14, 5:29 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Orangeburg	46 min
May 14, 5:50 PM EDT	Tornado Warning	CAE	Orangeburg	26 min
May 14, 6:01 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Orangeburg	59 min
May 14, 6:14 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell	46 min
May 14, 6:30 PM EDT	Special Weather Statement	CAE	Chesterfield	45 min
May 14, 7:03 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Orangeburg	42 min
May 14, 7:22 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield	23 min
May 14, 7:38 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Lancaster	52 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.