A weak impulse rotated around a large closed low located across the lower Great Lakes. Scattered showers and thunderstorms developed during the afternoon and evening.
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.
A weak impulse rotated around a large closed low located across the lower Great Lakes. Scattered showers and thunderstorms developed during the afternoon and evening. A few of these storms became severe producing large hail and damaging winds.
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 Sep 27, 1:19 PM EST, 2 hours 51 minutes earlier.
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</html>HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 357 AM EDT TUE SEP 27 2011 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-280800- LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD- MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON- RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON- BAMBERG- 356 AM EDT TUE SEP 27 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. A FEW THUNDERSTORMS THIS AFTERNOON AND EVENING COULD POSSIBLY CONTAIN DAMAGING WIND AND HAIL. .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.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 443 PM EDT TUE SEP 27 2011 SCZ027-030-272145- AIKEN-LEXINGTON- 443 PM EDT TUE SEP 27 2011 ...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF LEXINGTON AND AIKEN COUNTIES THROUGH 545 PM EDT... AT 438 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM...OVER NORTHERN AIKEN COUNTY...MOVING EAST AT 15 MPH. SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...INTERSTATE 20 BETWEEN MILE MARKERS 28 AND 42. MOTORISTS SHOULD USE CAUTION. PREPARE NOW FOR THE FOLLOWING HAZARDS... GUSTY WINDS OF 40 TO 50 MPH... PEA SIZE HAIL... TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING... PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. 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 3389 8143 3372 8130 3366 8161 3378 8164 TIME...MOT...LOC 2040Z 257DEG 15KT 3375 8150
The Columbia radar (KCAE), 51 km away, was scanning. The volume nearest the first event began at 21:11 UTC.
9 thunderstorm wind, 3 hail. Local standard time, as filed.
South Carolina Sept. Ag report said hail up to 2 inches fell in the Aiken area on Tuesday 9/27. Half dollar sized hail was also reported by the public on Gooseneck Road about 2 miles south of I-20 and exit 29.
Reported nickel size hail at exit 29 on I-20.
Trees down on Pioneer Rd.
Aiken Electric Coop reported trees down near the New Holland Xrds area.
Hail larger than golfball size covering the ground on Wire Rd. outside of Aiken.
Tree blocking road near US 176 and Mt. Bethel Garmany Rd.
Trees down in Savannah Lakes Village.
Trees down on Callison Hwy/Hwy 67 and Quattlebaum Cemetery Rd.
Trees down on US Hwy 378 about one mile east of the McCormick County line.
Trees down on N. Martintown Rd. near US Hwy 378.
Trees down on Firetower Rd. and US Hwy 178.
Tree down on Highway 395 near George Lane.
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, September 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 2026-09-30. Each event’s entry at NCEI: 337537, 337528, 337507, 337712, 337534, 337440, 337450, 337472, 337488, 337503, 337496, 337439.