Alert archive / South Carolina / Special Weather Statements in 2015

Special Weather Statement, NWS Columbia, SC

August 11, 2015Chesterfield County, Lancaster County, South Carolina

NWS Columbia, SC issued this special weather statement at Aug 11, 2015, 5:12 PM EDT for Chesterfield County, Lancaster County, South Carolina. It was in force for 48 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 11, 2015, 5:12 PM EDT (21:12 UTC)
Expired: Aug 11, 2015, 6:00 PM EDT
In force: 48 min
Issued by: NWS Columbia, SC

Counties Chesterfield County, SC, Lancaster County, SC

The radar

The Columbia radar (KCAE), 109 km from the middle of the area, began a volume at 21:12 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 12:00Z, 9.2 hours before the alert went out and 157 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: 150 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 697 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 56 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.

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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 11, 2:37 PM EDT, 2 hours 35 minutes earlier.

Area forecast discussion, Aug 11, 2:37 PM EDT, 2 hours 35 minutes before

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Hazardous weather outlook, Aug 11, 2:20 AM EDT, 14 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
220 AM EDT TUE AUG 11 2015

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-120930-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
220 AM EDT TUE AUG 11 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MIDLANDS OF SOUTH CAROLINA
AND THE CENTRAL SAVANNAH RIVER AREA OF GEORGIA.

.DAY ONE...TODAY AND TONIGHT.

HEAVY RAIN WITH SOME OF THE SHOWERS AND THUNDERSTORMS COULD
RESULT IN LOCALIZED FLOODING TODAY AND TONIGHT. A FEW
THUNDERSTORMS WITH DAMAGING WIND COULD OCCUR THIS AFTERNOON AND
EVENING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Aug 11, 5:12 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
512 PM EDT TUE AUG 11 2015

SCZ015-016-112200-
CHESTERFIELD-LANCASTER-
512 PM EDT TUE AUG 11 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT LANCASTER...
NORTHEASTERN KERSHAW AND NORTHERN CHESTERFIELD COUNTIES...

AT 511 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM STURDIVANTS TO NEAR WAXHAW...AND MOVING SOUTHEAST AT
25 MPH.

WIND GUSTS OF 35 TO 45 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.

LOCATIONS IMPACTED INCLUDE...
LANCASTER...CHERAW...PAGELAND...CHESTERFIELD...ELGIN...HEATH
SPRINGS...IRWIN...JEFFERSON...RUBY...MOUNT CROGHAN...MCFARLAN AND
LANCASTER MILL.

LAT...LON 3465 7982 3459 8038 3462 8041 3458 8050
      3455 8076 3490 8088 3492 8087 3492 8079
      3482 8079 3481 7994 3469 7987
TIME...MOT...LOC 2111Z 304DEG 20KT 3490 8034 3489 8075

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 8:19 PM EDT	Special Weather Statement	CAE	Edgefield, Newberry, Saluda	56 min
Aug 11, 5:20 PM EDT	Special Weather Statement	CAE	Saluda	40 min
Aug 11, 5:49 PM EDT	Special Weather Statement	CAE	Clarendon	56 min
Aug 11, 6:21 PM EDT	Special Weather Statement	CAE	Chesterfield	39 min
Aug 11, 6:33 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield	42 min
Aug 11, 6:40 PM EDT	Severe Thunderstorm Warning	CAE	Clarendon	35 min
Aug 11, 5:25 PM EDT	Special Weather Statement	CAE	Columbia, Richmond	50 min
Aug 11, 6:07 PM EDT	Special Weather Statement	CAE	Richmond	38 min

Nearby

Special Weather Statements in South Carolina, 2015 Every special weather statement in 2015

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.