Localy heavy rains sent small stream over their banks flooding roadways and low lying areas around Columbia County. Several vehicles were caught in the floods and residents also reported water in their homes on Kings Bridge road.
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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.
Localy heavy rains sent small stream over their banks flooding roadways and low lying areas around Columbia County. Several vehicles were caught in the floods and residents also reported water in their homes on Kings Bridge road.
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, 8:19 PM EST, 3 hours 41 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE COLUMBIA SC 919 PM EDT WED AUG 12 2009 .SYNOPSIS... COLD FRONT WILL STALL OUT ALONG THE ATLANTIC COAST TONIGHT KEEPING A GOOD CHANCE FOR SHOWERS ACROSS THE MIDLANDS. THE FRONT WILL REMAIN ALONG THE COAST AND TRY TO SWING INLAND THURSDAY. THIS WILL CONTINUE TO KEEP SHOWERS AND THUNDERSTORMS ACROSS THE AREA THURSDAY. CHANCES OF RAIN WILL BEGIN TO DECREASE INTO THE UPCOMING WEEKEND AS THE UPPER RIDGE BEGINS TO MOVE BACK OVER THE AREA. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... UPDATE AS OF 915 PM: COLD FRONT HAS BECOME NEARLY STATIONARY ACROSS THE SC MIDLANDS THIS EVENING. BULK OF PRECIPITATION IS CURRENTLY OVER SOUTHERN GA EXTENDING INTO THE SOUTHERN SC COASTAL COUNTIES. WILL KEEP CHANCE POPS IN THE FORECAST FOR THE NEXT SEVERAL HOURS...BECOMING A SLIGHT CHANCE DURING THE PREDAWN HOURS. UPDATE AS OF 505 PM: HAVE CLEARED THE EASTERN COUNTIES OF CWA FROM WATCH #700. THE THREAT OF SEVERE WEATHER HAS DIMINISHED CONSIDERABLY OVER THAT AREA AS THE AIRMASS HAS BECOME A BIT MORE STABLE. PREVIOUS DISCUSSION: STALLED FRONT NEAR THE ATLANTIC COAST AND A SHORT WAVE ENTERING NORTHWEST GEORGIA WILL COMBINE WITH THE RIGHT ENTRANCE REGION OF 200-300MB JET TO KEEP A SEVERE WEATHER CHANCE FOR THE EASTERN COUNTIES OF OUR COUNTY WARNING AREA THIS EVENING. WATCH NUMBER 700 WILL REMAIN IN EFFECT UNTIL 900 PM EDT. GFS MODEL GUIDANCE SHOWS 1500 TO 3000 J/KG VALUES ACROSS THE SOUTHERN MIDLANDS TO THE COAST THIS AFTERNOON. GFS SHOWED MORE INSTABILITY THAN THE NAM MODEL WHICH IS MORE INDICATIVE OF THE SITUATION. THE MAIN CONVECTION OCCURRED ALONG THE COLD FRONT AS IT MOVED TROUGH THE AREA. THE CHANCE OF THUNDERSTORMS WILL CONTINUE TO BE HIGH AS THE SHORT WAVE CROSSES THE REGION LATER THIS EVENING...WITH THE MAIN THREAT BEING DAMAGING WINDS AND POSSIBLY LARGE HAIL. INDIVIDUAL STORMS ARE MOVING TOO FAST TO BE A FLOOD THREAT...HOWEVER TRAINING STORMS OVER THE SAME AREA WOULD BOOST THAT THREAT AS WELL. ONCE THE SHORTWAVE EXITS THE AREA...THE CHANCE OF THUNDER WILL DECREASE. SKIES WILL REMAIN MOSTLY CLOUDY TO CLOUDY AS COOLER AIR MOVES IN ACROSS THE REGION TONIGHT. LOWERED LOW TEMPERATURES A DEGREE OVERNIGHT TO SHOW THIS. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/... ALL MODEL GUIDANCE KEEPS THE FRONT STALLED OFF OR MOVE IT BACK WEST. THIS WILL CONTINUE TO GIVE THE AREA A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS WITH A MOIST ATMOSPHERE STILL IN PLACE. EXPECT CLOUDINESS AND COOLER AIR TO KEEP HIGH TEMPERATURES COOLER SO LOWERED THURSDAY HIGHS SEVERAL DEGREES. KEPT LIKELY POPS FOR THURSDAY. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... A CHANGE IN THE LONG WAVE WEATHER PATTERN IS BEING INDICATED BY MODEL GUIDANCE AS A LONG WAVE TROUGH DIGGS DOWN ALONG THE WEST COAST. THIS WILL FORCE THE UPPER LEVEL RIDGE BACK WESTWARD ACROSS THE SOUTHEAST UNITED STATES. THE CHANCE OF RAIN WILL CONTINUE FOR MUCH OF THE WEEKEND...BUT CONTINUE TO DECREASE. RAISED TEMPERATURES FROM SUNDAY THROUGH TUESDAY AND DECREASED POPS AS WELL TO REFLECT THIS. THE WEST COAST TROUGH THEN SWINGS EAST TOWARD THE AREA BY MIDWEEK...SO ADDED A CHANCE FOR THUNDERSTORMS ON WEDNESDAY. && .AVIATION /01Z THURSDAY THROUGH MONDAY/... FRONTAL BOUNDARY HAS MOVED EAST OF THE TAF SITES. LIGHT RAIN TO AFFECT THE TAF SITES THROUGH SUNSET. POCKETS OF MVFR CIGS ACROSS THE AREA THIS EVENING BUT EXPECT MOSTLY MVFR CONDITIONS AFTER SUNSET WITH FOG AND STRATUS. EXPECT KOGB...KAGS AND KDNL TO GO IFR IN FOG OVERNIGHT. EXPECT CIGS/VSBYS TO IMPROVE TO AT LEAST MVFR BY LATE MORNING THURSDAY WITH ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS THURSDAY AFTERNOON. DURING THE EXTENDED PERIOD...BRIEF PERIODS OF MVFR MAY BE ENCOUNTERED WITH SCATTERED AFTERNOON CONVECTION INTO SUNDAY. && .CAE WATCHES/WARNINGS/ADVISORIES... SC...NONE. GA...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 1259 PM EDT WED AUG 12 2009 GAZ040-063>065-077-SCZ015-016-018-020>022-025>028-030-130915- LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD- MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON- RICHLAND-AIKEN- 1259 PM EDT WED AUG 12 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. SCZ029-031-035>038-041-130915- LEE-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-BAMBERG- 1259 PM EDT WED AUG 12 2009 ...SEVERE THUNDERSTORM WATCH 700 IN EFFECT UNTIL 9 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL SOUTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS REQUESTED THROUGH THIS EVENING.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 817 PM EDT WED AUG 12 2009 SCZ027-130045- LEXINGTON- 817 PM EDT WED AUG 12 2009 ...A STRONG THUNDERSTORM WAS AFFECTING LEXINGTON COUNTY... AT 814 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 11 MILES NORTHWEST OF LEXINGTON...MOVING NORTHEAST AROUND 10 MPH. 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. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. PERSONS IN THE VICINITY OF LAKE MURRAY SHOULD BE ON THE LOOKOUT FOR LOCALLY HEAVY RAIN. REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE IN COLUMBIA TOLL FREE AT 1 800 7 7 5 7 1 9 9. BC
The Columbia radar (KCAE), 102 km away, was scanning. The volume nearest the first event began at 04:58 UTC.
1 flash flood. Local standard time, as filed.
EM reported flooding of streams over roads and into homes trapping some vehicles and causing some damage to homes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2009Every state in 2009This day in weather historyWarnings in Georgia, August 2009
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: 180378.