mainly taking down trees and some powerlines.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CAE wrote it up.
Widely scattered thunderstorms produced some severe weather across the area...mainly taking down trees and some powerlines.
The local office's own words before the first event, 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 the first event at Aug 12, 3:53 PM EST, 22 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE COLUMBIA SC 453 PM EDT FRI AUG 12 2011 .SYNOPSIS... A WEAK NEARLY STATIONARY FRONT WILL REMAIN SOUTH OF THE AREA THROUGH SATURDAY. A STRONGER COLD FRONT WILL APPROACH THE REGION FROM THE NORTHWEST SUNDAY AND WILL MOVE THROUGH THE STATE BY MONDAY. && .NEAR TERM /TONIGHT/... ISOLATED TO SCATTERED THUNDERSTORMS WILL REMAIN POSSIBLE OVER THE NEXT SEVERAL HOURS. BRIEF STRONG GUSTY WINDS AND HEAVY RAINFALL MAY OCCUR IN THE STRONGER SLOW MOVING STORMS. TEMPS WILL REMAIN IN MID TO UPPER 80S IN AREAS WITH SUNSHINE. AREAS THAT HAVE RAINFALL...OR HAVE A STRONG GUST FRONT MOVE THROUGH COULD FALL INTO THE 70S FOR PERIODS. PRECIP SHOULD DIMINISH BY MIDNIGHT. CLOUDS WILL PERSIST THROUGH THE NIGHT WITH MIN TEMPS BETWEEN 70 AND 75 DEGREES. && .SHORT TERM /SATURDAY THROUGH SUNDAY/... EXPECT MUCH OF THE SAME SATURDAY AS THE WEAK FRONTAL BOUNDARY REMAINS TO THE SOUTH. WEAK IMPULSE MOVING THROUGH THE AFTERNOON WILL KEEP A CHANCE OF AFTERNOON/EVENING CONVECTION IN THE AREA. A COLD FRONT WILL APPROACH THE AREA SUNDAY ALONG WITH A NEGATIVELY TILTED UPPER-LEVEL TROUGH. MOISTURE WILL BE INCREASING AHEAD OF THE FRONT SO EXPECT A GREAT CHANCE OF WIDESPREAD PRECIP AND LOCALLY ISOLATED SEVERE STORMS. HIGHS SHOULD BE CLOSER TO NORMAL IN THE UPPER 80S TO LOWER 90S BECAUSE OF INCREASED SKY COVERAGE AND INCREASING POPS. LOWS FOR SATURDAY NIGHT ARE EXPECTED TO RANGE FROM 70 TO 75 DEGREES. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... GENERALLY DRIER AIR WILL MOVE IN ON MONDAY AS HIGH PRESSURE BUILDS IN FROM THE NORTH. THE FRONT APPEARS TO SHIFT EAST OF THE REGION MONDAY WITH DRY RIDGING DOMINATING TUESDAY AND WEDNESDAY. SOME MOISTURE RECOVERY WILL LIKELY OCCUR LATER IN THE WEEK AS AN UPPER TROUGH DEVELOPS OVER THE EASTERN SEABOARD. ISOLATED POPS THROUGH MID-WEEK AND MAINLY LOW CHANCE POPS THURSDAY INTO FRIDAY. HIGHS WILL BE MAINLY AROUND 90 TO THE LOWER 90S...WITH LOWS RANGING FROM THE MID 60S TO AROUND 70 DEGREES. && .AVIATION /21Z FRIDAY THROUGH WEDNESDAY/... MVFR CIGS TO PERSIST IN THE CENTRAL MIDLANDS THROUGH MID AFTERNOON THEN BECOMING VFR AFTER 22Z. MVFR CIGS AND VSBYS IN SHOWERS AND THUNDERSTORMS THROUGH THE EVENING. MVFR CIGS AND VSBYS BETWEEN 10Z AND 14Z OVER MUCH OF THE AREA LATE TONIGHT/EARLY TOMORROW MORNING THEN BECOMING VFR AFTER 15Z. GENERALLY VFR CONDITIONS REMAINDER OF THE PERIOD EXCEPT IN THUNDERSTORMS. EXTENDED AVIATION OUTLOOK...MVFR CONDITIONS POSSIBLE MAINLY IN PATCHY MORNING FOG AND AFTERNOON AND EVENING THUNDERSTORMS. && .CAE WATCHES/WARNINGS/ADVISORIES... SC...NONE. GA...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 448 PM EDT FRI AUG 12 2011 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-130900- LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD- MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON- RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON- BAMBERG- 448 PM EDT FRI AUG 12 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA. .DAY ONE...TONIGHT. STRONG TO POSSIBLY SEVERE THUNDERSTORMS WITH GUSTY WINDS AND VERY HEAVY RAINFALL WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE ON SUNDAY AHEAD OF AN APPROACHING SYSTEM. AT THIS TIME THE MAIN THREAT APPEARS TO BE DAMAGING WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
1229 PM EDT FRI AUG 12 2011
SCZ016-022-029-031-038-121730-
CHESTERFIELD-CLARENDON-KERSHAW-LEE-SUMTER-
1229 PM EDT FRI AUG 12 2011
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF CHESTERFIELD...
KERSHAW...LEE...SUMTER AND CLARENDON COUNTIES THROUGH 130 PM EDT...
AT 1225 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORMS OVER KERSHAW... LEE... EAST SUMTER... AND
CLARENDON COUNTIES MOVING EAST AT 10 MPH. LOCALLY HEAVY RAINS WILL
ACCOMPANY THESE STORMS WITH PONDING OF WATER ON ROADS AND LOW LYING
AREAS. WIND GUSTS TO 50 MPH MAY ALSO OCCUR.
SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
OAKLAND...BISHOPVILLE...CAMDEN...CHERAW...CHESTERFIELD...MANNING...
MILLWOOD...MULBERRY...SOUTH SUMTER AND SUMTER...
PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PEA SIZE HAIL...
PONDING OF WATER ON ROADS AND LOW LYING AREAS...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3454 7983 3449 7989 3449 8005 3436 8028
3433 8023 3437 8017 3423 8011 3415 8015
3400 7990 3394 7997 3387 7988 3375 7999
3361 8031 3446 8082 3452 8069 3448 8066
3449 8055 3456 8055 3481 7994 3462 7978
TIME...MOT...LOC 1625Z 252DEG 7KT 3373 8021
SJNSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 413 PM EDT FRI AUG 12 2011 SCZ030-035-122100- AIKEN-BARNWELL- 413 PM EDT FRI AUG 12 2011 ...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF AIKEN AND BARNWELL COUNTIES THROUGH 500 PM EDT... AT 406 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM...NEAR SAVANNAH RIVER SITE...MOVING EAST AT 5 MPH. SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE... JACKSON...NEW ELLENTON AND SAVANNAH RIVER SITE... PREPARE NOW FOR THE FOLLOWING HAZARDS... GUSTY WINDS OF 30 TO 40 MPH... TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING... PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 3333 8138 3313 8164 3329 8184 3344 8167 TIME...MOT...LOC 2013Z 285DEG 5KT 3330 8167 MC
The Columbia radar (KCAE), 63 km away, was scanning. The volume nearest the first event began at 21:14 UTC.
7 thunderstorm wind. Local standard time, as filed.
Sheriff reported trees down at the intersection of Hwy 78 and Cedar road.
Public reported trees down in North Augusta.
Sheriff reported trees and powerlines down near the intersection of Stoney Battery road and Spearman road.
DOT reported trees down on Wagener road and Trail road.
Sheriff reported trees down at the intersection of Blewer road and Dunn road.
Sheriff reported trees down at the intersection of US 321 and Hwy 64.
DOT reported a few trees down on Rivers Bridge road southwest of Ehrhardt.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Carolina in 2011Every state in 2011This day in weather historyWarnings in South Carolina, August 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 324752, 322211, 322214, 322224, 322222, 322217, 322225.