Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 198, NWS Columbia, SC

June 28, 2011Edgefield County, McCormick County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jun 28, 2011, 3:18 AM EDT for Edgefield County, McCormick County, South Carolina. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 28, 2011, 3:18 AM EDT (07:18 UTC)
Expired: Jun 28, 2011, 4:00 AM EDT
In force: 42 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Edgefield County, SC, McCormick County, SC

The radar

The Columbia radar (KCAE), 95 km from the middle of the area, began a volume at 07:19 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.3 hours before the alert went out and 225 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: 1964 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 1097 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Columbia, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 28, 1:38 AM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Jun 28, 1:38 AM EDT, 1 hour 40 minutes before

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Hazardous weather outlook, Jun 27, 3:39 AM EDT, 23 hours 39 minutes before

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In the hours before

Special weather statement, Jun 28, 2:55 AM EDT, 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
255 AM EDT TUE JUN 28 2011

GAZ040-064-SCZ018-025-280745-
COLUMBIA-EDGEFIELD-LINCOLN-MCCORMICK-
255 AM EDT TUE JUN 28 2011

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF
LINCOLN...COLUMBIA...EDGEFIELD AND LINCOLN COUNTIES THROUGH 345 AM
EDT...

AT 253 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM PLUM BRANCH TO 13
MILES SOUTHWEST OF PARKSVILLE...MOVING EAST AT 10 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...LAKE THURMOND...PLUM
BRANCH...PARKSVILLE.

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 30 TO 40 MPH...
PEA SIZE HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THUNDERSTORMS POSE A VARIETY OF THREATS TO BOATERS ON LAKE THURMOND.
YOUR BEST COURSE OF ACTION DURING A THUNDERSTORM IS TO SEEK SAFE
HARBOR. IF YOU ARE CAUGHT IN THE OPEN LAKE WATERS...STAY BELOW
DECK...AND IF POSSIBLE...AWAY FROM UNGROUNDED METAL OBJECTS.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

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 3390 8231 3389 8193 3361 8219 3362 8243
      3363 8245 3366 8244 3364 8247 3364 8249
      3368 8251
TIME...MOT...LOC 0653Z 271DEG 8KT 3383 8227 3369 8239

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 8:19 PM EDT	Special Weather Statement	CAE	Newberry, Saluda	56 min
Jun 28, 2:55 AM EDT	Special Weather Statement	CAE	McCormick	50 min
Jun 28, 1:51 PM EDT	Severe Thunderstorm Warning	CAE	Orangeburg	39 min
Jun 28, 2:26 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Orangeburg	49 min
Jun 28, 3:05 PM EDT	Severe Thunderstorm Warning	CAE	Lee, Sumter	40 min
Jun 28, 3:19 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell	41 min
Jun 28, 3:30 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw	45 min
Jun 28, 3:38 PM EDT	Severe Thunderstorm Warning	CAE	Sumter	22 min
Jun 28, 4:51 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Lancaster	54 min
Jun 28, 7:44 PM EDT	Severe Thunderstorm Warning	CAE	Burke, Columbia, McDuffie, Richmond	61 min

Nearby

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