Severe Thunderstorm Warning 207, NWS Charleston, SC

025 
WWUS52 KCHS 012202
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
602 PM EDT WED AUG 1 2012

SCC019-012230-
/O.CON.KCHS.SV.W.0207.000000T0000Z-120801T2230Z/
CHARLESTON SC-
602 PM EDT WED AUG 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTH CENTRAL CHARLESTON COUNTY...

AT 602 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM NEAR SECESSIONVILLE...MOVING SOUTHWEST
AT 10 MPH.

PREPARE NOW FOR THE FOLLOWING HAZARDS...
DAMAGING WINDS IN EXCESS OF 60 MPH...
TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...FOLLY 
BEACH...JAMES ISLAND...JAMES ISLAND COUNTY PARK AND MAYBANK BRIDGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING DAMAGING WINDS OF 58 
MPH OR GREATER...DEADLY LIGHTNING AND VERY HEAVY RAIN. GO INSIDE A 
STURDY SHELTER. MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3270 7988 3268 7988 3266 7990 3263 7997
      3260 7999 3261 8001 3265 8001 3276 8004
      3274 7986 3273 7986
TIME...MOT...LOC 2202Z 040DEG 8KT 3267 7997

$$

152 
WWUS52 KCHS 012217
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
617 PM EDT WED AUG 1 2012

SCC019-012227-
/O.CAN.KCHS.SV.W.0207.000000T0000Z-120801T2230Z/
CHARLESTON SC-
617 PM EDT WED AUG 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHARLESTON
COUNTY HAS BEEN CANCELLED...

AT 617 PM EDT...RADAR INDICATED THAT THE THUNDERSTORM THAT PROMPTED
THE WARNING HAD WEAKENED...THUS THE WARNING HAS BEEN CANCELED.

ALTHOUGH THE SEVERE THUNDERSTORM WARNING IS NO LONGER IN EFFECT...
THUNDERSTORMS ARE STILL CAPABLE OF PRODUCING GUSTY WINDS...SMALL
HAIL...FREQUENT LIGHTNING AND HEAVY RAINFALL. THE SAFEST COURSE OF
ACTION IS TO REMAIN INDOORS UNTIL THE STORMS HAVE PASSED.

LAT...LON 3270 7988 3268 7988 3266 7990 3263 7997
      3260 7999 3261 8001 3265 8001 3276 8004
      3274 7986 3273 7986
TIME...MOT...LOC 2217Z 040DEG 8KT 3264 8000

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
530 PM EDT WED AUG 1 2012

.SYNOPSIS...
ATLANTIC HIGH PRESSURE WILL PREVAIL THROUGH THE WEEK...WHILE A
TROUGH OF LOW PRESSURE PERSISTS INLAND. AN UPPER LEVEL TROUGH
WITH EMBEDDED DISTURBANCES WILL LINGER OVER THE REGION THROUGH
THURSDAY...BEFORE ATLANTIC HIGH PRESSURE BUILDS OVER THE REGION THIS
WEEKEND.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
ONGOING FORECASTS REMAIN ON TRACK AND REQUIRED ONLY MINOR
ADJUSTMENTS TO EARLY EVENING POPS/OTHER PARAMETERS.

DRIER AIR IN THE MID AND UPPER LEVELS OF THE ATMOSPHERE CONTINUES
TO BE ADVECTED INTO THE AREA WHICH IS LIMITING THE COVERAGE AND
INTENSITY OF CURRENT CONVECTION. EXPECT CONVECTION...WHICH SHOULD
REMAIN MOST CONCENTRATED NEAR THE VERY SLOWLY INLAND MOVING SEA
BREEZE ACROSS THE TRI- COUNTY AREA...TO DIMINISH FAIRLY QUICKLY
AFTER SUNSET. SKIES SHOULD BECOME MOSTLY CLEAR AND WITH LIGHT
WINDS MIGHT ALLOW FOR SOME PATCHY LIGHT FOG TO FORM TOWARDS LATE. DID
NOT MENTION FOG IN THE GRIDS/FORECAST FOR TONIGHT...BUT LATER
SHIFTS MAY NEED TO ADD MENTION IF WINDS DECOUPLE AND SKIES CLEAR
QUICKER THAN CURRENTLY EXPECTED. LOWS TONIGHT SHOULD MAINLY BE
FROM 73 TO 78.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/...
THURSDAY...WEAK LEE TROUGHING WILL PERSIST OVER THE MIDLANDS...THUS
RESULTING IN LIGHT ONSHORE FLOW FOR MOST OF THE DAY. WE SHOULD SEE
ANOTHER WARM DAY WITH WEST MID LVL FLOW KEEPING SKIES MOSTLY SUNNY
THROUGH THE EARLY AFTERNOON. 1000-850MB THICKNESS LEVELS SUPPORT
OVERALL HIGH TEMPS REACHING THE LOW/MID 90S...WITH HIGHEST TEMPS
INLAND. CONVECTION APPEARS TO INITIALLY DEVELOP ALONG AN INLAND
MOVING SEABREEZE EARLY THURSDAY AFTERNOON NEAR THE SAME TIME THAT
CONVECTIVE TEMPS IN THE LOW 90S ARE MET. DESPITE A WEST MID LVL
FLOW...OVERALL COVERAGE SHOULD EXPAND IN THE EVENING AS A WEAK H5
SHORTWAVE ROUNDS THE BASE OF A TROUGH TO OUR NORTH AND PASSES OVER
THE SOUTHEAST. AT THIS TIME...THE SEVERE WEATHER POTENTIAL WILL
REMAIN SOMEWHAT LOW AND ISOLATED GIVEN MARGINAL MID LVL LAPSE RATES
AND A WEAK WIND FIELD. HOWEVER...STRONG SFC HEATING SHOULD ALLOW
SBCAPE TO APPROACH THE 2500-3000 J/KG RANGE BEFORE THE ONSET OF
SHOWERS/THUNDERSTORMS. THESE CAPE VALUES IN COMBINATION WITH LIFTED
INDEX VALUES NEAR -8C AND PWATS BETWEEN 1.5 TO 2.0 INCHES SUGGEST
PULSE TYPE THUNDERSTORMS WITH FEW CAPABLE OF PRODUCING AN ISOLATED
STRONG DOWNBURST. SHOWERS AND THUNDERSTORMS SHOULD DIMINISH SHORTLY
AFTER SUNSET WHILE THE WEAK H5 SHORTWAVE SHIFTS OFFSHORE. OVERALL
LOW TEMPS WILL REACH THE LOW/MID 70S...WITH UPPER 70S ALONG THE
IMMEDIATE COAST.

FRIDAY AND SATURDAY...A TYPICAL SUMMERTIME PATTERN WILL BE PRESENT
THIS WEEKEND WITH ATLANTIC HIGH PRESSURE EXPANDING OVER THE
SOUTHEAST AND A MID LVL RIDGE PRESENT OVER THE CENTRAL UNITED
STATES. OVERALL TEMPS WILL REMAIN A DEGREE OR TWO ABOVE
CLIMATOLOGY...IN THE LOW 90S. OVERNIGHT LOWS WILL BE IN THE LOW/MID
70S. HAVE MAINTAINED 20-30 POPS EACH AFTERNOON FOR SHOWERS AND
THUNDERSTORMS THAT DEVELOP ALONG OR AHEAD OF AN INLAND MOVING
SEABREEZE. ACTIVITY WILL REMAIN DIURNAL IN NATURE GIVEN WEAK
MID/UPPER LVL SUPPORT. THE OVERALL SEVERE WEATHER THREAT WILL ALSO
REMAIN LOWER THAN PREVIOUS DAYS.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
THE AREA WILL REMAIN POSITIONED BETWEEN SURFACE HIGH PRESSURE TO THE
WEST AND A SUBTROPICAL HIGH TO THE EAST. MODELS SHOW A BRIEF
PERIOD OF SUBTLE HEIGHT FALLS DURING THE FIRST PORTION OF THE
PERIOD...BUT OVERALL EXPECT WEAK UPPER RIDGING TO PERSIST ALONG THE
EASTERN UNITED STATES THOUGH THE EXTENDED PORTION OF THE FORECAST.
AT THE SURFACE...THE SUBTROPICAL HIGH WILL CONTINUE TO BUILD
WESTWARD ALLOWING PLENTY OF TROPICAL MOISTURE TO SPREAD ACROSS THE
AREA. THEREFORE...TYPICAL SUMMERTIME AFTERNOON SHOWERS CAN BE
EXPECTED MOST AFTERNOONS WITH HIGHS GENERALLY IN THE LOW TO MID 90S.
MILD AND MUGGY NIGHTS WILL CONTINUE WITH LOWS GENERALLY IN THE LOW
TO MID 70S.

&&

.AVIATION /21Z WEDNESDAY THROUGH MONDAY/...
MAINLY VFR FOR THE NEXT 24 HOURS. HOWEVER...FAIRLY DECENT CHANCE FOR SOME
LIGHT FOG TONIGHT SO INTRODUCED VSBYS AT 5SM FROM 09Z TO 13Z AT
BOTH TERMINALS. CAN NOT TOTALLY RULE OUT SOME LOW STRATUS CEILINGS
LATE TONIGHT AND EARLY THURSDAY AT BOTH TERMINALS...BUT ATTM IT
APPEARS THE MOST LIKELY SCENARIO IS SOME SCATTERED LOW CLOUDS SO
ALSO INTRODUCED SOME SCT015 AT BOTH TERMINALS.

EXTENDED AVIATION OUTLOOK...MVFR CIGS/VSBYS POSSIBLE THURSDAY
AFTERNOON/EVENING WITH SHOWERS/THUNDERSTORMS. VFR CIGS/VSBYS THEN
EXPECTED THROUGH THE WEEKEND.

&&

.MARINE...
OUTSIDE ANY THUNDERSTORMS...EXPECT A NOCTURNAL SURGE TONIGHT
WHICH SHOULD BRING SW WINDS UP INTO THE 10 TO 15 KNOT/GUST TO 20 KT
RANGE IN MOST AREAS. THIS SHOULD RESULT IN A SMALL INCREASE IN
SEAS...AS HIGH AS 3 FT WITHIN NEARSHORE WATERS AND NO HIGHER THAN
4-5 FT BEYOND 20 NM...BY THE LATTER HALF OF TONIGHT.

CONDITIONS WILL REMAIN WELL BELOW SMALL CRAFT ADVISORY THRESHOLDS
LATE THIS WEEK INTO EARLY NEXT WEEK. WE COULD SEE ANOTHER PERIOD OF
THUNDERSTORMS THURSDAY EVENING BEFORE ATLANTIC HIGH PRESSURE BUILDS
OVER THE WATERS THROUGH THE WEEKEND. IN GENERAL...SOUTH/SOUTHWEST
WINDS BETWEEN 10-15 KT WILL PERSIST ON THE WESTERN SIDE OF THE
ATLANTIC RIDGE WITH BRIEF INCREASES TO 15-20 KT ALONG INLAND MOVING
SEABREEZE CIRCULATIONS AND EARLY NIGHT SURGES. SEAS WILL REMAIN
BETWEEN 2-4 FEET...WITH SEAS HIGHEST BEYOND 20 NM.

&&

.TIDES/COASTAL FLOODING...
PER LATE WEDNESDAY AFTERNOON TIDE DEPARTURES...LATEST
EXTRATROPICAL SURGE GUIDANCE AND THE SEA BREEZE...THE POTENTIAL FOR
SHALLOW SALT WATER FLOODING IN CHARLESTON COUNTY IS SUFFICIENT
WITH THE EVENING HIGH TIDE TO JUSTIFY A COASTAL FLOOD ADVISORY
VALID 7-11 PM.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
SC...COASTAL FLOOD ADVISORY UNTIL 11 PM EDT THIS EVENING FOR SCZ050.
MARINE...NONE.

&&

SYNOPSIS...
NEAR TERM...SPR/MTE
SHORT TERM...DPB
LONG TERM...DPB
AVIATION...SPR/MTE
MARINE...SPR/DPB/MTE
TIDES/COASTAL FLOODING...

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
529 PM EDT WED AUG 1 2012

AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040-
042>045-047>049-051-052-022130-
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-COASTAL JASPER-
TIDAL BERKELEY-
529 PM EDT WED AUG 1 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL
WATERS...SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA.

.DAY ONE...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.

SCZ050-022130-
CHARLESTON-
529 PM EDT WED AUG 1 2012

...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH CAROLINA.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   COASTAL FLOOD 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.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
536 PM EDT WED AUG 1 2012

SCZ050-012200-
CHARLESTON-
536 PM EDT WED AUG 1 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF CHARLESTON COUNTY
THROUGH 600 PM EDT...

AT 533 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR SECESSIONVILLE...MOVING SOUTH AT 15 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
FOLLY BEACH...FORT JOHNSON...FORT SUMTER...JAMES ISLAND...JAMES
ISLAND COUNTY PARK...MAYBANK BRIDGE AND WEST ASHLEY...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 MPH...
TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING...

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 3268 7988 3265 7992 3263 7997 3262 7998
      3260 8001 3261 8003 3277 8008 3281 8002
      3277 7991 3276 7991 3276 7989 3274 7986
TIME...MOT...LOC 2135Z 341DEG 11KT 3269 7992