Alert archive / South Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Columbia, SC

August 13, 2011Kershaw County, Richland County, South Carolina

NWS Columbia, SC issued this special weather statement at Aug 13, 2011, 9:03 PM EDT for Kershaw County, Richland County, South Carolina. It was in force for 57 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: Aug 13, 2011, 9:03 PM EDT (01:03 UTC)
Expired: Aug 13, 2011, 10:00 PM EDT
In force: 57 min
Issued by: NWS Columbia, SC

Counties Kershaw County, SC, Richland County, SC

The radar

The Columbia radar (KCAE), 48 km from the middle of the area, began a volume at 01:05 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.1 hours before the alert went out and 223 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: 1747 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 718 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 13, 7:47 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, Aug 13, 7:47 PM EDT, 1 hour 16 minutes before

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Hazardous weather outlook, Aug 13, 7:53 PM EDT, 1 hour 10 minutes before

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In the hours before

Local storm report, Aug 13, 4:19 PM EDT, 4 hours 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
419 PM EDT SAT AUG 13 2011

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0345 PM     TSTM WND DMG     3 NNE SILVERSTREET      34.25N 81.69W
08/13/2011                   NEWBERRY           SC   LAW ENFORCEMENT

            TREES DOWN ON POWERLINES NEAR THE
            INTERSECTION OF STONEY BATTERY RD AND
            SPEARMAN RD.

&&

Local storm report, Aug 13, 5:58 PM EDT, 3 hours 5 minutes before

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Special weather statement, Aug 13, 7:12 PM EDT, 1 hour 51 minutes before

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Local storm report, Aug 13, 7:20 PM EDT, 1 hour 43 minutes before

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Special weather statement, Aug 13, 8:01 PM EDT, 1 hour 2 minutes before

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Special weather statement, Aug 13, 9:03 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:01 PM EDT	Special Weather Statement	CAE	Fairfield, Lancaster	59 min
Aug 13, 10:02 PM EDT	Special Weather Statement	CAE	Chesterfield, Kershaw, Lee, Richland	58 min
Aug 14, 2:45 PM EDT	Special Weather Statement	CAE	Lexington	60 min
Aug 14, 3:13 PM EDT	Special Weather Statement	CAE	Barnwell	62 min
Aug 14, 3:28 PM EDT	Special Weather Statement	CAE	Aiken	62 min
Aug 14, 3:47 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Barnwell	43 min
Aug 14, 3:52 PM EDT	Special Weather Statement	CAE	Bamberg, Orangeburg	38 min
Aug 14, 3:53 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Orangeburg	52 min
Aug 14, 4:02 PM EDT	Special Weather Statement	CAE	Calhoun, Sumter	58 min
Aug 14, 4:05 PM EDT	Special Weather Statement	CAE	McCormick	40 min
Aug 14, 4:10 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield, McCormick, Saluda	50 min
Aug 14, 4:32 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Calhoun, Clarendon, Lee, Orangeburg, Richland and 1 more	58 min
Aug 14, 4:52 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Newberry	53 min
Aug 14, 5:05 PM EDT	Special Weather Statement	CAE	Aiken, Edgefield	40 min
Aug 14, 5:48 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Richland	42 min
Aug 14, 6:25 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Lee, Richland, Sumter	65 min
Aug 14, 6:30 PM EDT	Special Weather Statement	CAE	Bamberg, Barnwell	45 min

Nearby

Special Weather Statements in South Carolina, 2011 Every special weather statement 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.