This Severe weather event was two fold, with a early morning event and an afternoon event. A frontal boundary pushed southward through the region in the early morning hours resulting in scattered thunderstorms across the region.
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 CHS wrote it up.
This Severe weather event was two fold, with a early morning event and an afternoon event. A frontal boundary pushed southward through the region in the early morning hours resulting in scattered thunderstorms across the region. In the afternoon, numerous residual boundaries from overnight convection in combination with the seabreeze and adequate instability resulted in another round of thunderstorms developing across the area.
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 Charleston, SC wrote its last area forecast discussion before the first event at Aug 23, 2:44 AM EST, 2 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHARLESTON SC 344 AM EDT THU AUG 23 2007 .SYNOPSIS... HIGH PRESSURE WILL REMAIN IN PLACE THROUGH THE WEEKEND. A COLD FRONT WILL APPROACH THE AREA EARLY NEXT WEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... CLUSTER OF STRONG THUNDERSTORMS CONTINUES TO TREK SOUTHWARD ACROSS OUR NRN SC ZONES THIS MORNING. MORE ISOLATED STORMS CONTINUE DEVELOPING ACROSS INTERIOR GEORGIA. BOTH OF THESE AREAS OF SHOWERS AND STORMS ARE DUE TO A WEAKNESS IN THE UPPER RIDGE CURRENTLY RESIDING ABOVE A THETA-E RIDGE WITH MOIST ONSHORE CONVERGENT FLOW. BOTH THE RUC AND THE NAM-12 EARLIER SHOWED AN AREA OF CONVECTION PUSHING ACROSS THE AREA OVERNIGHT AND THIS SEEMS TO BE MATERIALIZING. MORE STORMS REMAIN N OF THE AREA ACROSS NE SC...SLOWLY PUSHING S. 00Z KCHS SOUNDING SHOWED -6.5C 500 MB TEMP AND A 700-500 MB LAPSE RATE OF 6.1 C/KM. MORE CONVECTION WILL LIKELY FIRE ALONG EXTENSIVE BOUNDARIES...BE THEY ACTIVE OR REMNANT. WILL CARRY CHANCE POPS MOST AREAS THROUGH 12Z. A LULL IS EXPECTED DURING THE MID TO LATE MORNING BUT ANOTHER ROUND OF SCATTERED CONVECTION IS EXPECTED THIS AFTERNOON. WEAK UPPER LOW WILL CONTINUE TO MEANDER OVER THE AREA...WHILE LOW- LEVELS STAY MOIST WITH ONSHORE FLOW...ROBUST SEABREEZE DEVELOPS IN EARLY AFTERNOON...AND MOISTURE CONVERGENCE INCREASES AROUND 850 MB. EXPECT TODAY/S CONVECTIVE PATTERN TO BE SIMILAR TO WED WITH SCATTERED CELLS DEVELOPING BY EARLY AFTERNOON...EXPANDING IN COVERAGE AS OUTFLOW BOUNDARIES AND THE SEABREEZE COME INTO PLAY. WILL CARRY SOLID CHANCE POPS TODAY MOST AREAS AWAY FROM THE IMMEDIATE COAST. HEAT INDICES SHOULD NOT BE A PROBLEM TODAY DESPITE THE DEWPTS REMAINING IN THE 70S. LOWER THICKNESSES SHOULD YIELD HIGHS SEVERAL DEGREES BELOW YESTERDAY/S READINGS...KEEPING HEAT INDICES IN THE 100 TO 105 RANGE. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/... FRIDAY...THE UPPER RIDGE AXIS LOOKS TO SHIFT A TAD E WHILE THE ATLC SURFACE RIDGE BUILDS W. ANOTHER ACTIVE SEABREEZE IS EXPECTED WITH 1000-1500 J/KG CAPE DEVELOPING ACROSS THE EASTERN TWO-THIRDS BY AFTERNOON. ALTHOUGH UPPER LEVELS WILL BE WARMER WITH STRONGER CAPPING...STILL EXPECT ISOLATED TO SCATTERED SHOWERS AND STORMS TO DEVELOP. TEMPS TO BE COMPARABLE TO THU WITH HEAT INDICES AGAIN JUST BELOW ADVISORY CRITERIA. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... INVERTED UPPER TROUGH WITH AMPLE LOW-LEVEL MOISTURE SHOULD YIELD SLIGHTLY ABOVE-NORMAL POPS THROUGH THE WEEKEND. HEAT INDICES WILL BE FLIRTING WITH ADVISORY CRITERIA SEVERAL DAYS...MAINLY FAR INLAND ZONES WHERE HIGHEST TEMPS ARE EXPECTED. COOL FRONT TO APPROACH FROM THE N LATE IN THE PERIOD...HOWEVER STRONG RIDGING IN PLACE WILL LIKELY PREVENT IT FROM MAKING IT AS FAR S AS OUR AREA BEFORE WASHING OUT. CLIMO POPS/TEMPS MON THROUGH WED. && .AVIATION /07Z THURSDAY THROUGH MONDAY/... MUCH OF THE 00Z MODEL GUIDANCE SUGGESTING TODAY WILL BE AN ACTIVE CONVECTIVE DAY AROUND BOTH OF OUR MAJOR AIRPORTS. MAIN PROBLEM AT THE CURRENT TIME IS THE SELECTION OF A MOST LIKELY TIME FRAME WINDOW. STRONG STORMS CONTINUE TO FLIRT WITH THE CHS TERM ALTHOUGH THE STRONGEST CORES HAVE GONE TO THE W. CONTINUED BUILDING ALONG AN EXTENSIVE OUTFLOW MAY WELL BRING TSRA THROUGH CHS TERM IN THE NEXT TWO HOURS. TEMPO/D TSRA THROUGH 09Z. KSAV MAY SEE STORMS DEVELOPING AROUND 12Z...BUT WE WILL HAVE TO WAIT AND SEE HOW THE UPSTREAM AND DOWNSTREAM CONVECTION INTERACTS. EXTENDED AVIATION OUTLOOK...VFR CONDITIONS WILL PREVAIL THROUGH MUCH OF THE EXTENDED PERIOD...OUTSIDE OF AN ISOLD AFTN/EVNG SHOWER OR TSTM. && .MARINE... TSTMS JUST INLAND APPEAR TO BE A SIGNIFICANT IMPETUS FOR YANKING THE BACKDOOR BOUNDARY SOUTHWARD THROUGH THE WATERS THIS MORNING. BOTH THE NAM AND GFS IN BETTER AGREEMENT ON COASTAL WINDS THIS MORNING WITH LIGHT S AND SW FLOW CURRENTLY...SHIFTING ONSHORE QUICKLY TODAY. WE TEND TO LIKE THE SLIGHTLY BETTER SURGES DISPLAYED BY THE NAM. SEAS AND SWELL COMPONENT GRADUALLY BUILDING TODAY INTO TONIGHT BUT THE SEAS LIKELY TO STAY BLO SCA CRITERIA UNLESS MORE SURGING THAN FORECAST OCCURS. MOST OF THE TRENDS FOR BOTH WINDS AND SEAS WERE MAINTAINED THIS FORECAST. RIP CURRENTS...WITH INCREASING AFTN ONSHORE FLOW AND SWELLS ALSO ON THE INCREASE WITH AN ADDED GROUND SWELL...WE HAVE INDICATED A MODERATE RISK OF RIP CURRENTS TODAY...ESPECIALLY LATE AFTN OR EARLY EVENING HOURS WITH THE TIDE HEADED OUT. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...NONE. SC...NONE. MARINE...NONE. && JRL/24
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE CHARLESTON SC 1255 AM EDT THU AUG 23 2007 GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>051-230900- JENKINS-SCREVEN-CANDLER-BULLOCH-EFFINGHAM-TATTNALL-EVANS- INLAND BRYAN-COASTAL BRYAN-INLAND CHATHAM-COASTAL CHATHAM-LONG- INLAND LIBERTY-COASTAL LIBERTY-INLAND MCINTOSH-COASTAL MCINTOSH- ALLENDALE-HAMPTON-INLAND COLLETON-DORCHESTER-BERKELEY-INLAND JASPER- BEAUFORT-COASTAL COLLETON-CHARLESTON-COASTAL JASPER- 1255 AM EDT THU AUG 23 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA. .DAY ONE...TONIGHT. STRONG THUNDERSTORMS...SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP OVERNIGHT. A FEW OF THE STORMS MAY PRODUCE VERY GUSTY WINDS...FREQUENT CLOUD-TO-GROUND LIGHTNING AND TORRENTIAL RAINFALL. SOME SMALL HAIL IS ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. SEVERE THUNDERSTORMS...SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE REGION THURSDAY...ESPECIALLY DURING THE AFTERNOON AND EARLY EVENING. A FEW THUNDERSTORMS MAY BECOME SEVERE...PRODUCING DAMAGING WIND GUSTS TO AT LEAST 60 MPH. EXCESSIVE HEAT...FRIDAY THROUGH TUESDAY...THE COMBINATION OF HOT TEMPERATURES AND MODERATE HUMIDITY MAY PRODUCE HEAT INDEX VALUES IN THE 105 TO 110 DEGREE RANGE. HEAT ADVISORIES MAY BE REQUIRED. RIP CURRENTS...AN ENHANCED RISK OF RIP CURRENTS MAY REDEVELOP FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. AMZ330-350-352-354-374-230900- CHARLESTON HARBOR- WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT 20 NM- WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM- WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM...INCLUDING GRAYS REEF NATIONAL MARINE SANCTUARY- WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO 60 NM- 1255 AM EDT THU AUG 23 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. 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 CHARLESTON SC 205 AM EDT THU AUG 23 2007 SCZ044-045-230700- BERKELEY-DORCHESTER- 205 AM EDT THU AUG 23 2007 ...STRONG THUNDERSTORMS WILL IMPACT BERKELEY COUNTY AND DORCHESTER COUNTY THROUGH 300 AM EDT... AT 203 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CAPABLE OF PRODUCING GUSTY WINDS OF 35 TO 45 MPH. THIS STORM WAS LOCATED NEAR CHICORA...OR ABOUT 8 MILES NORTHWEST OF MONCKS CORNER...MOVING SOUTH AT 25 MPH. OTHER STRONG STORMS JUST TO THE NORTH OF HOLLY HILL WILL MOVE INTO NORTHERN DORCHESTER COUNTY THROUGH 300 AM. AREAS IN AND AROUND BONNEAU...BONNEAU BEACH...CROSS...DORCHESTER... EADYTOWN...GIVHANS...HARLEYVILLE...JEDBURG...KNIGHTSVILLE...MONCKS CORNER...PINOPOLIS...RIDGEVILLE...SAINT GEORGE AND SAINT STEPHEN WILL BE IMPACTED THROUGH 300 AM EDT. FREQUENT LIGHTNING IS OCCURRING WITH THESE THUNDERSTORMS. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS. IF INDOORS...STAY AWAY FROM WINDOWS AND DOORS. AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 IF YOU OBSERVE SEVERE WEATHER.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLESTON SC 254 AM EDT THU AUG 23 2007 SCZ043>045-050-230800- BERKELEY-CHARLESTON-DORCHESTER-INLAND COLLETON- 254 AM EDT THU AUG 23 2007 ...STRONG THUNDERSTORMS WILL IMPACT BERKELEY COUNTY...DORCHESTER COUNTY...COLLETON COUNTY AND CHARLESTON COUNTY THROUGH 400 AM EDT... AT 253 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LARGE CLUSTER OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING GUSTY WINDS OF 35 TO 45 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM SAINT GEORGE TO 6 MILES NORTHWEST OF GOOSE CREEK... MOVING SOUTH AT 15 MPH. AREAS IN AND AROUND ASHTON...CANADYS...COLLEGE PARK...COLLETON... COTTAGEVILLE...CROSS...DELEMAR CROSSROADS...DORCHESTER...GIVHANS... HARLEYVILLE...JEDBURG...KNIGHTSVILLE...LADSON...LODGE...PADGETTS... REEVESVILLE...RIDGEVILLE...ROUND O...RUFFIN...SAINT GEORGE... SANGAREE...SMOAKS...SUMMERVILLE AND WILLIAMS WILL BE IMPACTED THROUGH 400 AM EDT. FREQUENT LIGHTNING IS OCCURRING WITH THESE THUNDERSTORMS. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS. IF INDOORS...STAY AWAY FROM WINDOWS AND DOORS. AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY.
The Charleston,SC radar (KCLX), 57 km away, was scanning. The volume nearest the first event began at 07:46 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
Six trees were reported down in the vicinity of Highway 17.
Nickle size hail was reported to have fallen for 10 minutes at the Quick Stop on Byrnes Drive.
The public reported 60 mph wind gusts on Regent Street in Knightsville.
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: 52527, 52526, 52528.