A strong cold front associated with a vigorous upper level trough crossed the region during the day. In response to the tight pressure gradient, strong winds developed out ahead of the front as well as in the cold advection behind it.
Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
A strong cold front associated with a vigorous upper level trough crossed the region during the day. In response to the tight pressure gradient, strong winds developed out ahead of the front as well as in the cold advection behind it.
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 Dec 7, 12:52 PM EST, 1 hour 8 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
1252 PM EST WED DEC 7 2011
.SYNOPSIS...
A STRONG COLD FRONT WILL CROSS THE REGION TODAY...AND PUSH OFFSHORE
THIS EVENING. HIGH PRESSURE WILL BUILD BACK IN ON THURSDAY AND WILL
PREVAIL INTO EARLY NEXT WEEK.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
THE COLD FRONT REMAINS JUST TO THE WEST OF THE FORECAST AREA LATE
THIS MORNING...AND WILL CONTINUE TO PUSH EASTWARD THROUGH THE
FORECAST AREA THIS AFTERNOON AND THIS EVENING. MOISTURE ASSOCIATED
WITH THE FRONT IS RAPIDLY DIMINISHING...SO HAVE LOWERED POPS
CONSIDERABLY FOR THE LATE MORNING UPDATE. IN ADDITION TO LOWERING
POPS...HAVE RAISED A WIND ADVISORY FOR THE CHARLESTON TRI-COUNTY
AREA THROUGH THE AFTERNOON HOURS. MODEL SOUNDINGS SUGGEST THE
POTENTIAL TO GUST AS HIGH AS 45 TO 50 MPH THIS AFTERNOON ACROSS
THE ADVISORY AREA BASED ON TEMPERATURES REACHING HIGHS IN THE
MID/UPPER 70S AS EXPECTED. ELSEWHERE...EXPECT BREEZY CONDITIONS
BUT INCREASING CLOUD COVER AND LIGHTER WIND FIELDS ALOFT SHOULD
KEEP WINDS BELOW ADVISORY LEVELS. UPDATE WILL BE SENT SHORTLY.
LAKE WINDS...STRONG WINDS ARE EXPECTED ACROSS LAKE MOULTRIE
THROUGH TONIGHT.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY/...
THE FRONT WILL RAPIDLY CLEAR THE SOUTH CAROLINA COAST BETWEEN
6 PM AND 9 PM WITH LINGERING RAINS ENDING EARLY. MODELS SHOW
A QUICK CLEARING TREND TONIGHT AND HAVE TRENDED COLDER ON
ADVECTION REGIMES WITH LOWS NEAR FREEZING ALONG AND W OF I-95
BY DAWN ON THU. WE HAVE TRENDED OUR LOW TEMPS DOWN A COUPLE
DEGREES MOST AREAS. WINDS GUSTY IN THE EVENING ALONG AND E OF
I-95...DIMINISHING AFTER MIDNIGHT.
LAKE WINDS...CONDITIONS MAY BECOME HAZARDOUS ON THE SANTEE COOPER
LAKES THIS EVENING IN THE WAKE OF THE COLD FRONT. WE HAVE FORECAST
GUSTS NEAR 35 KT FOR A PERIOD OVER OPEN WATERS THIS EVENING.
THURSDAY...SURFACE HIGH PRESSURE WILL MOVE QUICKLY INTO THE
REGION BEHIND THE DEPARTING COLD FRONT THURSDAY MORNING. AT THE
SAME TIME...A SIGNIFICANTLY COLDER AIR MASS WILL SHIFT INTO THE
SOUTHEAST STATES WITHIN STRONG COLD ADVECTION IN THE WAKE OF THE
FRONT. ALTHOUGH MUCH DRIER AIR WILL SUPPORT ABUNDANT SUNSHINE
THURSDAY AFTERNOON...HIGH TEMPERATURES WILL BE AROUND 15 DEGREES
COOLER THAN WEDNESDAY. EXPECT TEMPERATURES TO BE SUPPRESSED IN THE
UPPER 50S ACROSS THE FORECAST AREA UNDER NORTHEAST FLOW DURING THE
DAYTIME HOURS THURSDAY. LOW TEMPERATURES THURSDAY NIGHT WILL ONCE
AGAIN FALL INTO THE 30 DEGREE RANGE.
FRIDAY...THE INITIAL SURFACE HIGH WILL WEAKEN AND STEADILY DRIFT
OFF THE EAST COAST ON FRIDAY...WHILE A WEAK COASTAL TROUGH
POTENTIALLY DEVELOPS ALONG ITS SOUTHERN PERIPHERY. THIS FEATURE
COULD PRODUCE ENOUGH MOISTURE CONVERGENCE TO SUPPORT MAINLY
ISOLATED SHOWERS OVER THE MARINE ZONES THROUGH THE WEEKEND...WITH
BEST CHANCES ON FRIDAY WHEN THE TROUGH IS STRONGEST AND CLOSEST TO
THE COAST. PREFER TO REMAIN RATHER CONSERVATIVE WITH RAIN
POTENTIAL OVER LAND AREAS BY KEEPING ANY MENTION OF SHOWERS
OFFSHORE. ALTHOUGH SURFACE FLOW WILL REMAIN NORTHEAST...LOW LEVEL
WINDS WILL BECOME MORE EAST/SOUTHEAST AS THE DAY PROGRESSES. THE
PATTERN SHIFT WILL ALLOW A SLIGHT MODERATION IN TEMPERATURES...WITH
HIGH TEMPERATURES BACK IN THE LOW TO MID 60S AND LOWS GENERALLY
IN THE 40 DEGREE RANGE.
SATURDAY...AN ELONGATED UPPER SHORTWAVE WILL SLIP FROM THE CENTRAL
PLAINS TO THE MID ATLANTIC AND SOUTHEAST STATES LATE FRIDAY
THROUGH SATURDAY. AT THE SURFACE...A SECONDARY DRY COLD FRONT WILL
PRECEDE ANOTHER HIGH PRESSURE CENTER BUILDING INTO THE REGION FROM
THE WEST/NORTHWEST. ALTHOUGH HIGH TEMPERATURES WILL BE NEAR
SEASONAL NORMALS SATURDAY AFTERNOON...EXPECT A REINFORCEMENT TO
THE COLD AIR MASS BY THE NIGHTTIME HOURS..WITH LOW TEMPERATURES
SATURDAY NIGHT FALLING BACK INTO THE LOW TO MID 30S INLAND. RAIN
CHANCES WILL CONTINUE OVER THE COASTAL WATERS...POSSIBLY LINKED TO
A LINGERING OFFSHORE BAROCLINIC ZONE STRETCHING PARALLEL OF THE
EAST COAST.
&&
.LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/...
AS THE SECONDARY SURFACE HIGH SHIFTS INTO THE REGION SATURDAY
NIGHT AND SUNDAY...EXPECT THE RESULTING COOLING TREND TO SUPPRESS
HIGH TEMPERATURES IN THE 50 DEGREE RANGE SUNDAY AFTERNOON. WILL
THEN LEAN TOWARD A FORECAST SOLUTION DEPICTING LINGERING SURFACE
HIGH PRESSURE UNDER WEAK UPPER TROUGHING OR ZONAL FLOW THROUGH
EARLY NEXT WEEK...AS PATTERN EVOLUTION FOR THE EXTENDED FORECAST
PERIOD REMAINS SOMEWHAT UNCERTAIN. PREFER TO KEEP HIGH
TEMPERATURES JUST BELOW SEASONAL NORMALS AROUND 60 DEGREES INTO
EARLY NEXT WEEK...WITH RAIN CHANCES REMAINING BELOW 15 PERCENT
OVER LAND.
&&
.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
VFR CONDITIONS WILL PERIODICALLY DETERIORATE TO MVFR LEVELS THROUGH
THIS EVENING AS SHOWERS ASSOCIATED WITH A COLD FRONT APPROACHES FROM
THE WEST. TRIED TO CAPTURE TIMING OF SHOWERS IN BRIEF TEMPO GROUPS
AT BOTH TERMINALS. SHOWERS WILL LIKELY AFFECT KSAV PRIOR TO AT KCHS
THIS AFTERNOON...BUT SHOWERS WILL LINGER INTO THE EARLY EVENING
HOURS ACROSS THE CHARLESTON AREA. ALSO...VEERING GUSTY WINDS WILL
CONTINUE TO MIX DOWN TO THE SURFACE THIS AFTERNOON AT BOTH
TERMINALS. GUSTS WILL SLOWLY DIMINISH AROUND MIDNIGHT IN THE WAKE OF
THE FRONT...BUT EXPECT SURFACE WINDS TO STILL REMAIN ELEVATED NEAR
10 KNOTS THROUGH SUNRISE. IF GUSTS DIMINISH QUICKER THAN EXPECTED
EARLY THURSDAY MORNING...LLWS MAY BECOME A CONCERN.
EXTENDED AVIATION OUTLOOK...VFR CONDITIONS ARE EXPECTED TO
PREVAIL INTO THE EARLY WEEKEND.
&&
.MARINE...
LATEST MODEL GUIDANCE INDICATES THAT GUSTS TO GALE FORCE CAN BE
EXPECTED ACROSS ALL WATERS LATE THIS AFTERNOON AND THIS EVENING
BEHIND A STRONG COLD FRONT. AS A RESULT...HAVE RAISED GALE
WARNINGS FOR ALL WATERS INCLUDING CHARLESTON HARBOR.
THURSDAY THROUGH SUNDAY...WINDS WILL STEADILY DECREASE THROUGH
THURSDAY MORNING...LIKELY FALLING BELOW ADVISORY CRITERIA ACROSS
THE NEARSHORE WATERS BY THE MID MORNING HOURS. IDEAL FETCH OVER
THE OFFSHORE GEORGIA WATERS WILL MAINTAIN AT LEAST 6 FT SEAS
THROUGH THURSDAY...THUS THE SMALL CRAFT ADVISORY WILL NEED TO
CONTINUE ACCORDINGLY. HIGH PRESSURE BUILDING FROM THE WEST
THURSDAY WILL WEAKEN AND SHIFT INTO THE ATLANTIC FRIDAY. A
REINFORCING COLD FRONT WILL CROSS THE AREA SATURDAY AHEAD OF A
SECONDARY SURFACE HIGH...WITH A CORRESPONDING INCREASE IN WINDS
AND SEAS INTO THE WEEKEND. MARGINAL ADVISORY CONDITIONS COULD BE
POSSIBLE BY SUNDAY.
&&
.CHS WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
SC...WIND ADVISORY UNTIL 5 PM EST THIS AFTERNOON FOR SCZ044-045-050-
052.
MARINE...GALE WARNING UNTIL 1 AM EST THURSDAY FOR AMZ330-350-352-354.
GALE WARNING UNTIL 5 AM EST THURSDAY FOR AMZ374.
&&HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHARLESTON SC 1154 AM EST WED DEC 7 2011 GAZ087-088-099>101-114>119-137>141-SCZ040-042-043-047>049-051-081000- 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-INLAND JASPER-BEAUFORT- COASTAL COLLETON-COASTAL JASPER- 1154 AM EST WED DEC 7 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST GEORGIA AND SOUTHEAST 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. SCZ044-045-050-052-081000- DORCHESTER-INLAND BERKELEY-CHARLESTON-TIDAL BERKELEY- 1154 AM EST WED DEC 7 2011 ...WIND ADVISORY IN EFFECT UNTIL 5 PM EST THIS AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST 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. WIND ADVISORY. .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. AMZ330-350-352-354-081000- 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- 1154 AM EST WED DEC 7 2011 ...GALE WARNING IN EFFECT UNTIL 1 AM EST THURSDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .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. GALE WARNING. .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. AMZ374-081000- WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO 60 NM- 1154 AM EST WED DEC 7 2011 ...GALE WARNING IN EFFECT UNTIL 5 AM EST THURSDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .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. GALE WARNING. .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.
The national radar mosaic for the moment the first event began.
5 strong wind. Local standard time, as filed.
Numerous trees were blown down across Northern Colleton County during the afternoon and early evening.
South Carolina highway patrol reported a tree down on Highway 64 in Lodge.
South Carolina highway patrol reported a tree down at the intersection of Keegan Drive and Cromwell Lane.
Dorchester County communications reported a tree down at the intersection of School Street and Owens Drive.
South Carolina highway patrol reportes a tree down on Santee Road.
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, December 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: 356663, 356658, 356659, 356660, 356662.