Alert archive / South Carolina / Special Weather Statements in 2015

Special Weather Statement, NWS Columbia, SC

August 11, 2015Clarendon County, South Carolina

NWS Columbia, SC issued this special weather statement at Aug 11, 2015, 5:49 PM EDT for Clarendon County, South Carolina. It was in force for 56 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, 5:49 PM EDT (21:49 UTC)
Expired: Aug 11, 2015, 6:45 PM EDT
In force: 56 min
Issued by: NWS Columbia, SC

County Clarendon County, SC

The radar

The Columbia radar (KCAE), 93 km from the middle of the area, began a volume at 21:51 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, 9.8 hours before the alert went out and 84 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: 62 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1104 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 28 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, 5:18 PM EDT, 31 minutes earlier.

Area forecast discussion, Aug 11, 5:18 PM EDT, 31 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
518 PM EDT TUE AUG 11 2015

.SYNOPSIS...
A COLD FRONT APPROACHING FROM THE WEST WILL MOVE INTO THE FORECAST
AREA TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WILL BE
ASSOCIATED WITH THE FRONT. DRYING WITH A DIMINISHED SHOWER CHANCE
WILL OCCUR WEDNESDAY.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
AN UPPER TROUGH REMAINS OVER THE EASTERN STATES WITH A COLD FRONT
EXTENDING FROM CENTRAL VA THROUGH THE NC MOUNTAINS TO CENTRAL
MISSISSIPPI. CONVERGENCE AND DIURNAL HEATING AHEAD OF THE
APPROACHING COLD FRONT WAS PRODUCING SCATTERED SHOWERS AND
THUNDERSTORMS. INSTABILITY APPEARS WEAK TO MODERATE. ISOLATED
THUNDERSTORMS WITH DAMAGING WIND ARE POSSIBLE GIVEN INSTABILITY
AND HEAVY PRECIPITATION LOADING. THE BEST MOISTURE AND INSTABILITY
WAS LOCATED IN THE EASTERN PART OF THE FORECAST AREA. PRECIPITABLE
WATER VALUES ARE AROUND 1.8 INCHES WEST TO 2.1 INCHES EAST.
LOCALIZED FLOODING MAY OCCUR.

CONVERGENCE ASSOCIATED WITH THE COLD FRONT SUPPORTS A CONTINUED
SHOWER AND THUNDERSTORM CHANCE TONIGHT WITH CHANCES DIMINISHING
DURING THE EARLY MORNING HOURS WEDNESDAY AS THE FRONT MOVES EAST
OF THE MIDLANDS AND CSRA. STAYED NEAR GUIDANCE CONSENSUS FOR LOWS
RANGING FROM THE UPPER 60S TO MID 70S.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/...
ALTHOUGH THE SURFACE FRONT MAY STALL OUT JUST TO THE EAST OF THE
CWA ALONG THE COASTAL PLAIN DURING THE DAY ON WEDNESDAY...IT
APPEARS AS IF THE DEEPER MOISTURE WILL BE WELL TO THE EAST OF THE
AREA. COMBINE THAT WITH A WEAK MID-LEVEL CAPPING INVERSION THROUGH
THE DAY...AND ONLY EXPECTING ISOLATED CONVECTION ACROSS THE
EXTREME EASTERN COUNTIES AT BEST. CONVECTIVE ACTIVITY WILL
DIMINISH QUICKLY AFTER SUNSET WEDNESDAY NIGHT. THURSDAY APPEARS TO
REMAIN ON THE DRY SIDE AS WELL. AS FOR TEMPERATURES...WENT WITH A
BLEND OF GUIDANCE...BUT FOR THE MOST PART HIGHS IN THE LOWER 90S
EACH AFTERNOON...AND LOWS AROUND 70 EACH NIGHT.

&&

.LONG TERM /THURSDAY THROUGH TUESDAY/...
LONGER RANGE GUIDANCE CONTINUES TO SHOW AN UPPER TROUGH ACROSS
THE EASTERN HALF OF THE NATION...WITH STRONG UPPER RIDGING ACROSS
THE WEST. THE OLD SURFACE FRONT WILL LINGER ACROSS THE REGION
THROUGH THE PERIOD...WHICH SHOULD KEEP ISOLATED TO SCATTERED
SHOWERS OR STORMS IN THE FORECAST EACH AFTERNOON ACROSS THE
EASTERN PORTIONS OF THE CWA. TEMPERATURE GENERALLY IN THE UPPER
80S TO LOWER 90S FOR HIGHS...WITH LOWS IN THE UPPER 60S TO MIDDLE
70S THROUGH THE PERIOD.

&&

.AVIATION /21Z TUESDAY THROUGH SUNDAY/...
VFR CONDITIONS EXPECTED OUTSIDE OF SHOWER AND THUNDERSTORM
THROUGH THIS EVENING. RESTRICTIONS POSSIBLE EARLY WEDNESDAY
MORNING.

SCATTERED SHOWERS AND THUNDERSTORMS CROSSING THE REGION WILL
CONTINUE INTO EARLY TONIGHT AS A COLD FRONT MOVES THROUGH.
HAVE INCLUDED VCSH FOR ALL TAF SITES GIVEN SCATTERED COVERAGE.
PRECIPITATION SHOULD END BY 03Z. WINDS WILL BE VARIABLE TONIGHT
AS THE FRONT CROSSES THE AREA AND WILL SHIFT TO NORTHERLY BEHIND
THE FRONT BY EARLY WEDNESDAY MORNING. MODELS SHOW POTENTIAL FOR
MVFR FOG EARLY WEDNESDAY MORNING...ALTHOUGH WINDS MAY STAY UP
ENOUGH OVERNIGHT TO PRECLUDE DEVELOPMENT. A DRIER AIRMASS WILL
BUILD INTO THE REGION FOR WEDNESDAY WITH NO RESTRICTIONS EXPECTED.

EXTENDED AVIATION OUTLOOK...NO SIGNIFICANT AVIATION RESTRICTIONS ARE
EXPECTED AT THIS TIME.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...NONE.
GA...NONE.

&&

Hazardous weather outlook, Aug 11, 2:20 AM EDT, 15 hours 29 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, 37 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

Special weather statement, Aug 11, 5:20 PM EDT, 29 minutes before

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

SCZ025-026-112200-
SALUDA-EDGEFIELD-
520 PM EDT TUE AUG 11 2015

...A STRONG THUNDERSTORM WILL AFFECT EASTERN MCCORMICK...NORTHERN
AIKEN...WESTERN LEXINGTON...SALUDA AND NORTHEASTERN EDGEFIELD
COUNTIES...

AT 520 PM EDT...A STRONG THUNDERSTORM WAS 8 MILES SOUTHEAST OF NINETY
SIX HISTORIC SITE...OR 16 MILES SOUTHEAST OF GREENWOOD...MOVING
SOUTHEAST AT 20 MPH.

WIND GUSTS OF 35 TO 45 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
BATESBURG-LEESVILLE...SALUDA...JOHNSTON...RIDGE SPRING...MONETTA AND
WARD.

LAT...LON 3395 8207 3396 8201 3401 8198 3404 8195
      3406 8194 3415 8183 3397 8152 3387 8158
      3371 8178 3394 8208
TIME...MOT...LOC 2120Z 304DEG 19KT 3403 8194

Special weather statement, Aug 11, 5:25 PM EDT, 24 minutes before

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

GAZ064-065-SCZ018-025-030-112215-
RICHMOND-COLUMBIA-MCCORMICK-EDGEFIELD-AIKEN-
525 PM EDT TUE AUG 11 2015

...A STRONG THUNDERSTORM WILL AFFECT RICHMOND...SOUTHEASTERN
LINCOLN...NORTHEASTERN MCDUFFIE...COLUMBIA...SOUTHERN MCCORMICK...
WEST CENTRAL AIKEN AND SOUTHWESTERN EDGEFIELD COUNTIES...

AT 525 PM EDT...A STRONG THUNDERSTORM WAS 10 MILES WEST OF EVANS...
MOVING SOUTHEAST AT 20 MPH.

WIND GUSTS OF 35 TO 45 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
NORTH AUGUSTA...GROVETOWN...EVANS...FORT GORDON...CLEARWATER...
BELVEDERE...MARTINEZ...AUGUSTA...HEPHZIBAH...GLOVERVILLE...BURNETTOWN
AND CLARKS HILL.

LAT...LON 3369 8228 3368 8227 3369 8225 3353 8179
      3325 8209 3351 8240 3353 8239 3355 8243
TIME...MOT...LOC 2125Z 295DEG 16KT 3357 8232

Special weather statement, Aug 11, 5:49 PM EDT, 0 minutes before

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

SCZ038-112245-
CLARENDON-
549 PM EDT TUE AUG 11 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN CALHOUN...
CLARENDON...SOUTHWESTERN SUMTER AND EASTERN ORANGEBURG COUNTIES...

AT 548 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM NEAR HEBRON TO 7 MILES NORTHWEST OF SUMMERTON...AND
MOVING SOUTHEAST AT 5 MPH.

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

LOCATIONS IMPACTED INCLUDE...
MANNING...SUMMERTON AND PAXVILLE.

IF YOU ARE ON OR NEAR LAKE MARION...GET OUT OF THE WATER AND MOVE
INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO
15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...
YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER
NOW. DO NOT BE CAUGHT ON THE WATER IN A THUNDERSTORM.

LAT...LON 3382 7992 3377 7999 3372 7997 3350 8010
      3350 8012 3348 8015 3346 8013 3345 8015
      3346 8016 3344 8027 3345 8028 3343 8034
      3363 8054 3371 8048 3372 8045 3372 8039
      3374 8039 3375 8037 3388 7993 3388 7988
TIME...MOT...LOC 2148Z 309DEG 6KT 3383 7993 3366 8045

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, 5:12 PM EDT	Special Weather Statement	CAE	Chesterfield, Lancaster	48 min
Aug 11, 5:20 PM EDT	Special Weather Statement	CAE	Saluda	40 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.