Showers and thunderstorms developed during the evening hours as an inland moving sea breeze interacted with differential heating boundaries. A few multi-cell thunderstorms became strong with damaging winds and heavy rainfall as they entered an environment that had surface based CAPE values around 3000 j/kg and DCAPE values over 800 j/kg.
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.
Showers and thunderstorms developed during the evening hours as an inland moving sea breeze interacted with differential heating boundaries. A few multi-cell thunderstorms became strong with damaging winds and heavy rainfall as they entered an environment that had surface based CAPE values around 3000 j/kg and DCAPE values over 800 j/kg.
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 29, 6:20 PM EST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHARLESTON SC 720 PM EDT TUE JUN 29 2010 .SYNOPSIS... ATLANTIC HIGH PRESSURE WILL PERSIST INTO WEDNESDAY. A COLD FRONT WILL DROP SOUTH THROUGH THE REGION LATE WEDNESDAY INTO THURSDAY. HIGH PRESSURE WILL THEN BUILD OVER THE REGION INTO EARLY NEXT WEEK. && .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/... THROUGH EARLY EVENING...NUMEROUS TO WIDESPREAD THUNDERSTORMS WILL FOCUS ACROSS FAR W/INLAND COUNTIES OF THE FORECAST AREA...WHERE BOUNDARY COLLISIONS AND CELL MERGERS WILL PRODUCE STRONG THUNDERSTORMS WITH GUSTY WINDS...TORRENTIAL RAINFALL AND FREQUENT LIGHTNING. AN ISOLATED THUNDERSTORM OR TWO COULD BECOME SEVERE WITH DAMAGING WET DOWNBURSTS AND EVEN QUARTER SIZE HAIL. LOWERED POPS MOST OTHER LOCATIONS...BELOW 15 PERCENT WITH NO MENTION OF PRECIPITATION ALONG THE COAST THROUGH THE EVENING. WILL CONTINUE TO ASSESS INLAND CONVECTIVE TRENDS...AS OUTFLOW FROM MULTICELL THUNDERSTORMS COULD PUSH S/SE INTO THE FORECAST AREA AND COULD PRODUCE ANOTHER ROUND OF CONVECTION ACROSS N/INLAND COUNTIES LATE EVENING INTO THE OVERNIGHT. HOWEVER...MOST AVAILABLE GUIDANCE SUGGESTS THAT INLAND CONVECTION WILL DISSIPATE BEFORE REACHING THE FORECAST AREA. MAINTAINED SLIGHT CHANCE POPS OVERNIGHT ACROSS COASTAL/NORTHERN COUNTIES AND COASTAL WATERS. WILL CONTINUE TO ASSESS THIS POTENTIAL AND WILL ADJUST FORECAST AS AS NEEDED LATER THIS EVENING. && .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/... MADE A FEW TWEAKS TO THE POP FORECAST THROUGH FRIDAY...BUT MAINTAINED THE OVERALL TREND AS A COLD FRONT DROPS ACROSS THE CWA. BY WEDNESDAY MORNING EXPECT THE FRONT TO BE POSITIONED ACROSS THE UPSTATE...AND THE FRONT WILL SLOWLY PROGRESS TOWARD THE CWA WEDNESDAY AFTERNOON. ABUNDANT MOISTURE WILL RESIDE AHEAD OF THE FRONT WITH PWATS WELL ABOVE 2 INCHES THROUGH THURSDAY. THIS MOISTURE AND ENERGY PROVIDED BY SHORTWAVE ACTIVITY AHEAD OF THE BOUNDARY SUGGEST HIGH CONFIDENCE IN THUNDERSTORM COVERAGE AHEAD OF THE FRONT WEDNESDAY AFTERNOON. THUS HAVE MAINTAIN LIKELY POPS WEDNESDAY WITH POPS DECREASING AFTER SUNSET. DUE TO LOSS OF DAYTIME HEATING...EXPECT THUNDERSTORM COVERAGE TO DECREASE. HOWEVER WILL MAINTAIN CHANCE POPS THROUGH THURSDAY MORNING AS THE FRONT PROPAGATES SOUTHWARD. PRECIP COVERAGE REMAINS DIFFICULT TO PIN DOWN THURSDAY AS COVERAGE AND POSITIONING OF PRECIP WILL DEPEND HEAVILY ON THE POSITIONING OF THE COLD FRONT. THINK THE FRONT WILL RESIDE OVER THE SOUTHERN PORTIONS OF THE CWA AND COASTAL WATERS...RESULTING IN THE HIGHEST CHANCE OF POPS ACROSS THOSE AREAS. RAIN CHANCES WILL DIMINISH THURSDAY NIGHT...BUT INCLUDED SOME CHANCE POPS ACROSS THE WATERS AS MODELS INDICATE A SECONDARY LOW DEVELOPING ACROSS THE NORTHERN WATERS AS THE FRONT PUSHES FURTHER OFFSHORE. MUCH DRIER AIR WILL FILTER IN BEHIND THE FRONT THURSDAY NIGHT AND FRIDAY WITH MODEL SOUNDINGS SHOWING PWATS DROP TO LESS THAN 1.5 INCHES. HIGH PRESSURE WILL BUILD INTO THE REGION WITH THE CWA ON THE EASTERN SIDE OF A HIGH PRESSURE RIDGE ON FRIDAY. WILL SEE A BIT OF A COOLING TREND BEHIND THE FRONTAL PASSAGE ON THURSDAY AND FRIDAY WITH HIGH TEMPERATURES IN THE MID TO UPPER 80S. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... SURFACE HIGH PRESSURE WILL BUILD INTO THE REGION FROM THE NORTH BEHIND THE DESCENDING FRONT THROUGH THE WEEKEND. AS DEEP MOISTURE REMAINS SOUTH OF THE FORECAST AREA...THE DRIER REGIME COULD POTENTIALLY SUPPRESS RAIN CHANCES EARLY NEXT WEEK. AS A RESULT...HAVE INDICATED NO MORE THAN SLIGHT CHANCE POPS DURING THE LONG TERM PERIOD. LOWER DEWPOINTS AND COOLER NORTHEAST/EAST SURFACE FLOW WILL KEEP HEAT INDICES BELOW 100 DEGREES AND MAINTAIN TEMPERATURES CLOSER TO SEASONAL NORMALS. && .AVIATION /23Z TUESDAY THROUGH SUNDAY/... THE POTENTIAL FOR THUNDERSTORMS HAS PASSED FOR THIS EVENING. HOWEVER...WILL MONITOR THUNDERSTORMS WELL INLAND. OTHERWISE...VFR CONDITIONS SHOULD PREVAIL. EXTENDED AVIATION OUTLOOK...MVFR OR LOWER CONDITIONS ARE POSSIBLE IN NUMEROUS SHOWERS AND THUNDERSTORMS ON WEDNESDAY...WITH MVFR OR LOWER CEILINGS POSSIBLE WEDNESDAY NIGHT AND THURSDAY AS A COLD FRONT DROPS THROUGH THE AREA. VFR CONDITIONS ARE THEN EXPECTED TO PREVAIL THROUGH THE WEEKEND. && .MARINE... ATLANTIC HIGH PRESSURE WILL MAINTAIN A SOUTH TO SOUTHWEST FLOW ACROSS THE WATERS TONIGHT...WITH GENERAL VEERING OF THE WINDS AS THE LANDMASS COOLS OVERNIGHT. ANOTHER NOCTURNAL SURGE IS EXPECTED TONIGHT WITH WINDS REACHING AS HIGH AS 15-20 KT AT TIMES. SEAS WILL RANGE 2-4 FT. A COLD FRONT WILL APPROACH THE WATERS LATE WEDNESDAY AND THURSDAY. WINDS WILL REMAIN GENERALLY 10 TO 15 KNOTS AT BEST WEDNESDAY AND THURSDAY...BUT EXPECT WINDS TO INCREASE FRIDAY IN THE WAKE OF THE FRONT. DEPENDING ON THE STRENGTH OF THE SURGE...SEAS COULD ALSO BUILD TO NEAR SCA CRITERIA LATE FRIDAY. HIGH PRESSURE WILL BUILD IN FROM THE WEST FRIDAY THROUGH SATURDAY. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...NONE. SC...NONE. MARINE...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHARLESTON SC 322 AM EDT TUE JUN 29 2010 GAZ087-088-099>101-114>116-118-137-138-140-SCZ040-042>045-047-052- 300800- JENKINS-SCREVEN-CANDLER-BULLOCH-EFFINGHAM-TATTNALL-EVANS- INLAND BRYAN-INLAND CHATHAM-LONG-INLAND LIBERTY-INLAND MCINTOSH- ALLENDALE-HAMPTON-INLAND COLLETON-DORCHESTER-INLAND BERKELEY- INLAND JASPER-TIDAL BERKELEY- 322 AM EDT TUE JUN 29 2010 ...STRONG TO SEVERE THUNDERSTORMS POSSIBLE THROUGH THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. SEVERE THUNDERSTORMS...SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO IMPACT MUCH OF SOUTHEAST SOUTH CAROLINA AND SOUTHEAST GEORGIA THIS AFTERNOON AND EVENING. A FEW OF THE THUNDERSTORMS MAY BECOME SEVERE WITH DAMAGING WINDS IN EXCESS OF 60 MPH. FREQUENT CLOUD TO GROUND LIGHTNING...SMALL HAIL AND LOCALLY HEAVY RAINFALL COULD ALSO OCCUR. PEOPLE ACROSS REGION SHOULD KEEP ABREAST OF THE LATEST WEATHER CONDITIONS THROUGHOUT THE DAY IN CASE WARNINGS ARE ISSUED. THIS CAN BE DONE THROUGH NOAA WEATHER RADIO ALL HAZARDS...TV OR YOUR LOCAL NEWS SOURCE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED AFTER 1 PM. GAZ117-119-139-141-SCZ048>051-300800- COASTAL BRYAN-COASTAL CHATHAM-COASTAL LIBERTY-COASTAL MCINTOSH- BEAUFORT-COASTAL COLLETON-CHARLESTON-COASTAL JASPER- 322 AM EDT TUE JUN 29 2010 ...MODERATE RISK FOR RIP CURRENTS IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS EVENING... ...STRONG TO SEVERE THUNDERSTORMS POSSIBLE THROUGH THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. MODERATE RISK FOR RIP CURRENTS. SEVERE THUNDERSTORMS...SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO IMPACT MUCH OF SOUTHEAST SOUTH CAROLINA AND SOUTHEAST GEORGIA THIS AFTERNOON AND EVENING. A FEW OF THE THUNDERSTORMS MAY BECOME SEVERE WITH DAMAGING WINDS IN EXCESS OF 60 MPH. FREQUENT CLOUD TO GROUND LIGHTNING...SMALL HAIL AND LOCALLY HEAVY RAINFALL COULD ALSO OCCUR. PEOPLE ACROSS REGION SHOULD KEEP ABREAST OF THE LATEST WEATHER CONDITIONS THROUGHOUT THE DAY IN CASE WARNINGS ARE ISSUED. THIS CAN BE DONE THROUGH NOAA WEATHER RADIO ALL HAZARDS...TV OR YOUR LOCAL NEWS SOURCE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED AFTER 1 PM. AMZ330-350-352-354-374-300800- 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- 322 AM EDT TUE JUN 29 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
227 PM EDT TUE JUN 29 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0645 PM TSTM WND DMG GLENNVILLE 31.94N 81.93W
06/27/2010 TATTNALL GA EMERGENCY MNGR
APPROXIMATELY 25 TREES WERE UPROOTED,AND POWER LINES WERE
DOWNED AROUND THE GLENNVILLE TO MENDES AREAS, IN THE
SOUTHEAST PORTION OF TATTNALL COUNTY.
&&
RFMSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
306 PM EDT TUE JUN 29 2010
GAZ138>141-291945-
COASTAL LIBERTY-COASTAL MCINTOSH-INLAND LIBERTY-INLAND MCINTOSH-
306 PM EDT TUE JUN 29 2010
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF MCINTOSH AND LIBERTY
COUNTIES THROUGH 345 PM EDT...
AT 307 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR WARSAW...MOVING NORTH AT 10 MPH.
SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
CRESCENT...EULONIA...HALFMOON LANDING...JONES...MIDWAY...PINE
HARBOR...RETREAT...RICEBORO...SHELLMAN BLUFF...SOUTH NEWPORT...
SUNBURY...TOWNSEND AND CROSSROADS...
PREPARE NOW FOR THE FOLLOWING HAZARDS...
STRONG WINDS OF 45 TO 55 MPH...
PENNY SIZE HAIL...
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 3153 8156 3161 8155 3170 8149 3172 8153
3188 8149 3182 8132 3180 8129 3179 8129
3179 8127 3175 8127 3175 8124 3148 8136
TIME...MOT...LOC 1907Z 195DEG 8KT 3160 8143SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
526 PM EDT TUE JUN 29 2010
GAZ101-118-119-SCZ047-051-292215-
COASTAL CHATHAM-COASTAL JASPER-EFFINGHAM-INLAND CHATHAM-INLAND
JASPER-
526 PM EDT TUE JUN 29 2010
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF EFFINGHAM...CHATHAM
AND JASPER COUNTIES THROUGH 615 PM EDT...
AT 526 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR CENTRAL JUNCTION...MOVING NORTH AT 15 MPH.
SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
GARDEN CITY...I-16/I-95 INTERCHANGE...MEINHARD...MONTEITH...POOLER...
PORT WENTWORTH...SAVANNAH AIRPORT...SAVANNAH AND THUNDERBOLT...
PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
DIME SIZE HAIL...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3201 8126 3229 8131 3229 8102 3208 8104
3208 8106 3207 8104 3201 8105
TIME...MOT...LOC 2126Z 178DEG 15KT 3210 8116SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
534 PM EDT TUE JUN 29 2010
GAZ087-292200-
JENKINS-
534 PM EDT TUE JUN 29 2010
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF JENKINS COUNTY
THROUGH 600 PM EDT...
AT 532 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR MILLEN...MOVING NORTHEAST AT 10 MPH.
SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
BUTTS...EMMALANE...MILLEN AND SCARBORO...
PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3290 8185 3291 8177 3291 8176 3277 8182
3268 8187 3267 8207 3285 8212
TIME...MOT...LOC 2134Z 218DEG 9KT 3279 8194SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
654 PM EDT TUE JUN 29 2010
GAZ087-292345-
JENKINS-
654 PM EDT TUE JUN 29 2010
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF JENKINS COUNTY
THROUGH 745 PM EDT...
AT 654 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR HERNDON...MOVING EAST AT 10 MPH.
SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
BUTTS...EMMALANE...HERNDON...MILLEN...PERKINS AND SCARBORO...
PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
DIME SIZE HAIL...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE CLOUD-TO-GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
IF INSIDE A VEHICLE...YOU SHOULD BE SAFE FROM LIGHTNING STRIKES AS
LONG AS IT IS NOT A CONVERTIBLE AND YOU AVOID TOUCHING WINDOWS AND
ELECTRONIC DEVICES.
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 3287 8213 3292 8208 3292 8195 3295 8189
3295 8185 3293 8179 3291 8177 3268 8187
3271 8211 3282 8215
TIME...MOT...LOC 2254Z 267DEG 7KT 3281 8213The Charleston,SC radar (KCLX), 86 km away, was scanning. The volume nearest the first event began at 23:19 UTC.
2 thunderstorm wind, 2 flash flood. Local standard time, as filed.
Law enforcement reported trees and power lines down in Millen.
A fire department reported a large oak tree fell onto a car and also blocked the intersection of North Masonic Street and East Winthrope Avenue.
Law enforcement reported sections of Cotton Avenue, North Masonic Street and Park Street in Millen closed due to high water.
The public reported seven inches of rainfall with widespread flooding on roadways in Millen.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2010Every state in 2010This day in weather historyWarnings in Georgia, June 2010
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: 246735, 246737, 246732, 246741.