Strong surface heating and high precipital water values led to an unstable atmosphere during afternoon hours. A few thunderstorms developed within this environment along a lee trough and became strong as they encountered an inland moving seabreeze.
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.
Strong surface heating and high precipital water values led to an unstable atmosphere during afternoon hours. A few thunderstorms developed within this environment along a lee trough and became strong as they encountered an inland moving seabreeze.
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 Jun 28, 12:08 PM EST, 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHARLESTON SC 108 PM EDT TUE JUN 28 2011 .SYNOPSIS... THE REGION WILL REMAIN BETWEEN ATLANTIC HIGH PRESSURE AND INLAND LOW PRESSURE INTO MID WEEK WHILE A COLD FRONT APPROACHES FROM THE NORTHWEST. THE FRONT WILL STALL OUT OVER THE AREA WEDNESDAY NIGHT THROUGH THURSDAY AS HIGH PRESSURE BUILDS IN FROM THE NORTH. ATLANTIC HIGH PRESSURE RE-BUILDS OVER THE WEEKEND. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... EARLY AFTERNOON ADJUSTMENTS WERE MADE TO ACCOUNT FOR A COUPLE OF THINGS. I WENT WITH SLIGHTLY LOWER TEMPS IN SOUTHERN ZONES DUE TO MORE EXTENSIVE CLOUD COVER THIS MORNING...AND I INCREASED THE POPS MORE QUICKLY OVER THE INTERIOR DUE TO THE RAPID CONVECTIVE DEVELOPMENT OVER THE PAST HOUR. ALL UPDATED PRODUCTS HAVE BEEN SENT. && .SHORT TERM /6 PM THIS EVENING THROUGH FRIDAY/... TONIGHT...CONVECTION SHOULD BE ONGOING DURING THE EVENING...OR AT THE LEAST PROGRESSING TOWARD THE AREA FROM THE NORTHWEST AHEAD OF A WEAK COLD FRONT. WILL CARRY HIGHEST POPS /50S/ DURING THE EVENING...THEN DIMINISH THEM SLOWLY THROUGH THE NIGHT. LOWS IN THE LOWER/MID 70S AWAY FROM THE MILDER COASTLINE. WEDNESDAY THROUGH FRIDAY...A WEAK NORTHWEST FLOW PATTERN IS EXPECTED MIDWEEK AS MID/UPPER LVL RIDGING OCCURS OVER THE CENTRAL UNITED STATES WHILE ATLANTIC RIDGING RETREATS EASTWARD OVER THE WESTERN ATLANTIC. A WEAK SFC FRONT WILL LIKELY STALL OVER THE FORECAST AREA BY WEDNESDAY...PROVIDING ENOUGH LIFTING TO PRODUCE A CHANCE OF SHOWERS AND THUNDERSTORMS WEDNESDAY AFTERNOON. PERIODS OF SHOWERS/THUNDERSTORMS MAY BE ENHANCED BY WEAK AREAS OF LOW PRESSURE THAT DEVELOP ALONG THE STALLED BOUNDARY AND AN INLAND MOVING SEABREEZE. PWATS EXCEEDING 2.0 INCHES...MARGINAL MID LVL LAPSE RATES...AND SBCAPES APPROACHING 2500 J/KG FAVOR THUNDERSTORMS CAPABLE OF PRODUCING HEAVY RAINFALL. CANNOT RULE OUT A FEW STRONG PULSE THUNDERSTORMS WITH GUSTY WINDS SHOULD THERE BE SUFFICIENT BREAKS IN CLOUD COVER DURING PEAK HEATING HOURS. 1000-850MB THICKNESS VALUES SUPPORT HIGH TEMPS IN THE LOW 90S WEDNESDAY...BUT INCREASING CLOUD COVER MAY LOWER OVERALL HIGH TEMPS A FEW DEGREES. OVERNIGHT LOWS ARE EXPECTED TO BE IN THE LOW 70S...WITH MID/UPPER 70S ALONG THE IMMEDIATE SC AND GA COASTLINE. THURSDAY AND FRIDAY...SHOWER AND THUNDERSTORM ACTIVITY WILL BE PRIMARILY DRIVEN BY LINGERING MOISTURE NEAR THE STALLED BOUNDARY OVER SOUTHERN PORTIONS OF THE FORECAST AREA THURSDAY. HAVE MAINTAINED LOW END SLIGHT CHANCE POPS OVER SOUTH CAROLINA AND LOW END CHANCE POPS OVER EXTREME SOUTHEAST GEORGIA THURSDAY AFTERNOON. A DRY FORECAST IS ANTICIPATED THURSDAY NIGHT AND FRIDAY AS SFC HIGH PRESSURE SETTLES OVER THE REGION AND A LIGHT NORTHERLY FLOW DEVELOPS. OVERALL HIGH TEMPS WILL BE NEAR NORMAL IN THE LOW 90S. OVERNIGHT LOWS WILL BE AROUND 70...WITH MID 70S ALONG THE IMMEDIATE COAST. && .LONG TERM /FRIDAY NIGHT THROUGH MONDAY/... CONDITIONS APPEAR DRY THROUGH SATURDAY AS WEAK SFC HIGH PRESSURE REMAINS OVER THE SOUTHEAST WHILE MID/UPPER LVL RIDGING FLATTENS AND EXPANDS FROM THE WEST. OVERALL HIGH TEMPS WILL BE IN THE LOW 90S SATURDAY...THEN GRADUALLY WARM INTO THE LOW/MID 90S SUNDAY AS THE MID/UPPER LVL RIDGE EXPANDS FURTHER OVER THE SOUTHEAST. ISOLATED SHOWERS/THUNDERSTORMS ARE POSSIBLE BY LATE WEEKEND INTO EARLY NEXT WEEK AS LIGHT ONSHORE FLOW RETURNS AND LEE SIDE TROUGHING DEVELOPS OVER THE MIDLANDS. OVERALL HIGH TEMPS WILL RUN A FEW DEGREES ABOVE NORMAL NEXT WEEK...IN THE LOW/MID 90S. OVERNIGHT LOWS WILL BE IN THE LOW 70S...WITH MID/UPPER 70S ALONG THE IMMEDIATE COAST. && .AVIATION /17Z TUESDAY THROUGH SATURDAY/... VFR CONDITIONS WILL PREVAIL AT BOTH KSAV AND KCHS THROUGH THE PERIOD. CB/S POSSIBLE LATE IN THE AFTERNOON AT BOTH TAF SITES...WITH SHOWERS AND THUNDERSTORMS POSSIBLE THEREAFTER THROUGH AT LEAST EARLY EVENING. THE APPROACH OF A WEAK COLD FRONT FROM THE NORTHWEST COULD KEEP RAIN CHANCES GOING LONGER THAN NORMAL TONIGHT. HOWEVER...WILL ADDRESS THE CONVECTIVE POSSIBILITIES WITH LATER TAF ISSUANCES AS CHANCES ARE TOO LOW TO MENTION ATTM. OTHERWISE...EXPECT GUSTY CONDITIONS THIS AFTERNOON WITH THE SEA BREEZE...ESPECIALLY AT KCHS. EXTENDED AVIATION OUTLOOK...MVFR/IFR CONDITIONS POSSIBLE WEDNESDAY WITH SHOWERS/THUNDERSTORMS...OTHERWISE VFR. && .MARINE... TODAY AND TONIGHT...WINDS ARE JUST A BIT LIGHTER THAN FORECAST SO FAR THIS MORNING...BUT NOT ENOUGH TO MAKE ANY CHANGES FOR THIS AFTERNOON. WINDS COULD KICK UP CLOSE TO ADVISORY LEVELS IN CHS HARBOR AND EVEN THE CHARLESTON COUNTY WATERS OUT TO 20 NM LATER TODAY/TONIGHT BUT WILL LEAVE THE FORECAST HEADLINE FREE FOR NOW. WEDNESDAY THROUGH SUNDAY...WEAK AREAS OF LOW PRESSURE MAY DEVELOP ALONG A STALLED BOUNDARY OVER OR NEAR THE COASTAL WATERS WEDNESDAY...RESULTING IN PERIODS OF SHOWERS/THUNDERSTORMS THROUGH WEDNESDAY EVENING. OTHERWISE...WINDS AND SEAS ARE EXPECTED TO REMAIN WELL BELOW SCA CRITERIA WEDNESDAY THROUGH EARLY NEXT WEEK. OVERALL...SEAS WILL 2 TO 3 FT WITH WINDS BELOW 15 KT. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...NONE. SC...NONE. MARINE...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHARLESTON SC 413 AM EDT TUE JUN 28 2011 AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040- 042>045-047>052-290900- 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-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-INLAND BERKELEY- INLAND JASPER-BEAUFORT-COASTAL COLLETON-CHARLESTON-COASTAL JASPER- TIDAL BERKELEY- 413 AM EDT TUE JUN 28 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS...SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
119 PM EDT TUE JUN 28 2011
GAZ087-088-099-100-SCZ040-042-281800-
ALLENDALE-BULLOCH-CANDLER-HAMPTON-JENKINS-SCREVEN-
119 PM EDT TUE JUN 28 2011
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF SCREVEN...JENKINS...
BULLOCH...CANDLER...ALLENDALE AND HAMPTON COUNTIES THROUGH 200 PM
EDT...
AT 118 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM GREEN HILL TO FOUR
POINTS...MOVING SOUTHEAST AT 10 MPH.
SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
ALTMAN...CAPTOLO...DOVER...HOPEULIKIT...HUNTERS...MIDDLEGROUND...
PORTAL...ROCKY FORD...SCARBORO...SYLVANIA...WOODCLIFF AND SHIRLEY...
PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PENNY SIZE HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HAVE AN ACTION PLAN READY IN THE EVENT THIS STORM STRENGTHENS OR A
WARNING IS ISSUED. CONTINUE TO MONITOR NOAA WEATHER RADIO ALL HAZARDS
FOR THE LATEST WEATHER INFORMATION.
BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
BE READY TO TAKE IMMEDIATE ACTION IN CASE A SEVERE THUNDERSTORM
WARNING IS ISSUED FOR YOUR LOCATION.
&&
LAT...LON 3256 8209 3255 8203 3260 8201 3262 8202
3266 8208 3267 8208 3287 8144 3267 8127
3244 8206 3254 8213
TIME...MOT...LOC 1720Z 319DEG 10KT 3273 8154 3259 8202The Charleston,SC radar (KCLX), 112 km away, was scanning. The volume nearest the first event began at 17:34 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
A spotter reported a large oak tree down in a back yard.
A spotter reported quarter size hail.
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, June 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: 328618, 328617.