Heavy rainfall over Columbia produced flash flooding in the 5 points area of Columbia.
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The episode as NWS CAE wrote it up.
Heavy rainfall over Columbia produced flash flooding in the 5 points area of Columbia.
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 26, 1:52 PM EST, 3 hours 48 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE COLUMBIA SC 252 PM EDT SUN AUG 26 2007 .SYNOPSIS... A WEAK FRONT WILL APPROACH THE REGION LATE TODAY AND TONIGHT...AND STALL ACROSS THE REGION MONDAY. THE FRONT WILL PUSH TO THE SOUTH BY WEDNESDAY. ANOTHER FRONTAL BOUNDARY WILL APPROACH ON SATURDAY. && .NEAR TERM /THROUGH TONIGHT/... SCATTERED CONVECTION ALREADY ONGOING THIS AFTERNOON WITH A VERY UNSTABLE ATMOSPHERE. SPC MESO ANALYSIS PAGE INDICATING SURFACE BASED CAPE VALUES IN EXCESS OF 2500 J/KG. LOW LEVEL LAPSE RATES ARE DESTABILIZING RAPIDLY AS WELL WITH VALUES OF AROUND 8 C/KM. THERE APPEARS TO BE A SURFACE TROUGH ORIENTED NORTHEAST TO SOUTHWEST ACROSS THE NORTHERN PART OF THE FORECAST AREA...WHICH IS WHERE THE MOST ORGANIZED CONVECTION HAS BEEN THUS FAR. SOUNDING IS VERY MOIST ADIABATIC AND THINK THIS WILL ULTIMATELY PREVENT OR LIMIT ANY SEVERE STORMS THIS AFTERNOON...ALTHOUGH AN ISOLATED STORM OR TWO COULD PRODUCE WET MICROBURST CONDITIONS. WILL KEEP CHANCE POPS GOING THROUGH THE EVENING HOURS AS PLENTY OF INSTABILITY WILL STILL BE AROUND...FOCUSING ON THE NORTHERN HALF OF THE FORECAST AREA. OVERNIGHT LOWS WILL BE MILD IN THE MID 70S AS CONVECTIVE DEBRIS CLOUDS AND RELATIVELY HIGH DEWPOINTS WILL PREVENT GOOD RADIATIVE COOLING. && .SHORT TERM /MONDAY THROUGH WEDNESDAY NIGHT/... A WEAK FRONTAL BOUNDARY CURRENTLY MOVING THROUGH THE MOUNTAINS WILL SLOWLY MOVE INTO THE MIDLANDS MONDAY BEFORE STALLING OUT SOMEWHERE IN THE MIDLANDS AND COASTAL PLAIN AREA. INSTABILITY WILL AGAIN BE STRONG ON MONDAY AND WITH THE SURFACE FRONT AND OTHER RESIDUAL BOUNDARIES NEARBY...HAVE KEPT THE HIGH CHANCE POPS ACROSS THE CENTRAL AND SOUTHERN FORECAST AREA. THOUGHT HARD ABOUT GOING WITH LIKELY POPS ALONG AND EAST OF I-20 BUT HELD JUST BELOW GIVEN THE PRECIPITATION WILL BE CONVECTIVELY DRIVEN AND THE INTERACTIONS WITH BOUNDARIES THAT ARE NOT YET IN PLACE LEADS TO A LOWER CONFIDENCE ON WHERE TO PLACE THE LIKELY POPS. AREAS THAT ARE LOCATED WHERE CONVECTION DEVELOPS WILL BE SUBJECT TO VERY HEAVY DOWNPOURS GIVEN THE MOIST AIRMASS WITH PRECIPITABLE WATER VALUES WELL OVER 2 INCHES AND 850H DEWPOINTS IN THE +14C TO +16C RANGE. THE FRONT WILL TRY TO SINK SOUTH ON TUESDAY BUT WILL STILL BE IN THE AREA AND THINK WE WILL AGAIN SEE SCATTERED CONVECTION DEVELOP IN THE VICINITY OF THE BOUNDARY...AND THEREFORE HAVE HIGH CHANCE POPS AGAIN ACROSS THE SOUTHERN FORECAST AREA. DRIER AIR WILL WORK IN FROM THE NORTH AS HIGH PRESSURE BUILDS IN BY WEDNESDAY AND SHIFT THE FRONTAL BOUNDARY FURTHER SOUTH INTO GEORGIA AND MOST OF THE FORECAST AREA SHOULD REMAIN DRY...BUT WILL KEEP A SLIGHT CHANCE IN THE CENTRAL SAVANNAH RIVER AREA. TEMPERATURES OVER THE NEXT FEW DAYS WILL BE SLIGHTLY ABOVE NORMAL AND IN THE LOWER 90S. && .LONG TERM /THURSDAY THROUGH SUNDAY/... AS WE MOVE TOWARDS THE END OF AUGUST THE UPPER FLOW PATTERN IS SHOWING SIGNS OF BECOMING MORE AMPLIFIED...AT LEAST BRIEFLY. THE UPPER RIDGE CENTERED OVER THE SOUTHEAST STATES EARLY IN THE WEEK RETROGRADES TO THE THE WEST AND BECOMES CENTERED OVER THE DESERT SOUTHWEST BY THE END OF THE WEEK. THIS RETROGRESSION OF THE RIDGE WILL ALLOW FOR SOME PENETRATION OF LOWER HEIGHTS ACROSS THE NORTHEAST AND INTO THE MID ATLANTIC ON THURSDAY AND FRIDAY. A COLD FRONT WILL APPROACH THE AREA BY EARLY SATURDAY AND PUSH INTO THE MIDLANDS OVER THE WEEKEND. EXPECT THE LOWEST CHANCES OF PRECIPITATION TO BE ON THURSDAY BEFORE THE COLD FRONT APPROACHES AND THEN INCREASE ON FRIDAY INTO SATURDAY WITH THE FRONTAL BOUNDARY IN THE VICINITY. TEMPERATURES WILL BE NEAR TO SLIGHTLY ABOVE NORMAL DURING THE PERIOD...WITH THE WARMER TEMPERATURES OCCURRING THURSDAY AND FRIDAY WITH SLIGHTLY COOLER AIR OVER THE WEEKEND. STILL DOES NOT APPEAR TO BE ANY SIGNIFICANT TROPICAL SYSTEMS ON THE HORIZON. && .AVIATION /18Z SUNDAY THROUGH FRIDAY/... WEAK COLD FRONT NORTH OF THE CAE CWA WILL DRIFT SLOWLY SOUTHEAST INTO THE NORTHERN PART OF CWA LATE TONIGHT NEAR 06Z THEN INTO CENTRAL PART OF AREA NEAR 12Z BEFORE STALLING OUT NEAR 18Z. GENERALLY VFR CONDITIONS BUT IFR-MVFR POSSIBLE IN SCATTERED SHOWERS AND THUNDERSTORMS DURING PERIOD. WITH DYNAMICS GONE LATE TONIGHT 04Z-06Z CONVECTIVE ACTIVITY SHOULD BE A MINIMUM FROM THEN UNTIL 14Z-16Z MONDAY. MVFR VSBYS EXPECTED 09Z-13Z AROUND SUNRISE MONDAY MORNING. SOME IFR CONDITIONS POSSIBLE AT LOCATIONS THAT GET MORE FOG LIKE AGS AND OGB...WILL ALSO GO WITH IFR CLOUD DECK AT 5-6 HUNDRED FT. CONDITIONS IMPROVING AFTER 13Z...GENERALLY VFR BUT AGAIN IFR-MVFR CONDITIONS POSSIBLE IN SCATTERED SHOWERS AND THUNDERSTORMS THROUGH 18Z MONDAY. AVIATION OUTLOOK... 18Z MONDAY THROUGH TUESDAY NIGHT...VFR CONDITIONS BUT IFR-MVFR CONDITIONS POSSIBLE IN SCATTERED SHOWERS AND THUNDERSTORMS. WEDNESDAY THROUGH THURSDAY...NO SIGNIFICANT IMPACTS EXPECTED. && .CAE WATCHES/WARNINGS/ADVISORIES... SC...NONE. GA...NONE. && SYNOPSIS...HC NEAR TERM...HC SHORT TERM...HC LONG TERM...HC AVIATION...TTH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 557 AM EDT SUN AUG 26 2007 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-271000- LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD- MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON- RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON- BAMBERG- 557 AM EDT SUN AUG 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORM WILL OCCUR THIS AFTERNOON AND TONIGHT. A FEW OF THE THUNDERSTORMS COULD POSSIBLY CONTAIN DAMAGING WIND AND HAIL THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... CURRENT DATA DOES NOT FAVOR WIDESPREAD SEVERE THUNDERSTORM DEVELOPMENT. THEREFORE...SPOTTER ACTIVATION SHOULD NOT BE REQUIRED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 1257 PM EDT SUN AUG 26 2007 SCZ020-021-027-028-261830- FAIRFIELD-LEXINGTON-NEWBERRY-RICHLAND- 1259 PM EDT SUN AUG 26 2007 ...STRONG THUNDERSTORMS DEVELOPING IN NEWBERRY AND FAIRFIELD COUNTIES... AT 1252 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS DEVELOPING 10 MILES EAST OF PROSPERITY IN EASTERN NEWBERRY COUNTY AND WESTERN FAIRFIELD COUNTY. THESE STORMS WERE DRIFTING SLOWLY TO THE SOUTH AND MAY MOVE INTO THE NORTHERN PORTIONS OF LEXINGTON AND RICHLAND COUNTIES WITHIN 30 OR 40 MINUTES. THESE STORMS MAY AFFECT THE LAKE MURRAY AREA AND CHAPIN AND IRMO DURING THIS TIME. INTENSE LIGHTNING IS EXPECTED WITH THESE STORMS. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. 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. TTH
The Columbia radar (KCAE), 11 km away, was scanning. The volume nearest the first event began at 22:41 UTC.
1 flash flood. Local standard time, as filed.
Flooding occurred on Elmwood, Assembly, Calhoun, Assembly, Bull, Richland, Devine, and Millwood streets. Water was up to a 2 feet deep.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Carolina in 2007Every state in 2007This day in weather historyWarnings in South Carolina, August 2007
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: 44048.