Severe Thunderstorm Warning 34, NWS Charleston, SC

000 
WWUS52 KCHS 042036
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
435 PM EDT FRI MAY 4 2007

GAC103-251-042100-
/O.CON.KCHS.SV.W.0034.000000T0000Z-070504T2100Z/
EFFINGHAM GA-SCREVEN GA-
435 PM EDT FRI MAY 4 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR EFFINGHAM AND SCREVEN COUNTIES...

AT 431 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR NEWINGTON...OR ABOUT 15 MILES NORTH OF SPRINGFIELD...
MOVING NORTHWEST AT 5 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...NEWINGTON.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

TO REPORT SEVERE WEATHER ONLY...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR
REPORTS TO CHS.SKYWARN@NOAA.GOV.

LAT...LON 3252 8144 3258 8133 3266 8148 3259 8156

$$

000 
WWUS52 KCHS 042051
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
450 PM EDT FRI MAY 4 2007

GAC103-042100-
/O.CAN.KCHS.SV.W.0034.000000T0000Z-070504T2100Z/
EFFINGHAM GA-
450 PM EDT FRI MAY 4 2007

...THE SEVERE THUNDERSTORM WARNING FOR EFFINGHAM COUNTY HAS BEEN
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED INTO SCREVEN 
COUNTY...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN 
CANCELLED. 

TO REPORT SEVERE WEATHER ONLY...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR
REPORTS TO CHS.SKYWARN@NOAA.GOV.

LAT...LON 3255 8148 3260 8139 3266 8148 3259 8156

$$

GAC251-042100-
/O.CON.KCHS.SV.W.0034.000000T0000Z-070504T2100Z/
SCREVEN GA-
450 PM EDT FRI MAY 4 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SCREVEN COUNTY...

AT 448 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
LOCATED NEAR NEWINGTON...OR ABOUT 12 MILES SOUTHEAST OF 
SYLVANIA...MOVING NORTHWEST AT 5 MPH.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO 
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

TO REPORT SEVERE WEATHER ONLY...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR
REPORTS TO CHS.SKYWARN@NOAA.GOV.

LAT...LON 3255 8148 3260 8139 3266 8148 3259 8156

$$

000 
WWUS52 KCHS 042058
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
457 PM EDT FRI MAY 4 2007

GAC251-042107-
/O.EXP.KCHS.SV.W.0034.000000T0000Z-070504T2100Z/
SCREVEN GA-
457 PM EDT FRI MAY 4 2007

...THE SEVERE THUNDERSTORM WARNING FOR SCREVEN COUNTY WILL EXPIRE AT
500 PM EDT...

AT 457 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE THUNDERSTORM WHICH PROMPTED THE WARNING HAD WEAKENED...THUS 
THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.

TO REPORT SEVERE WEATHER ONLY...PLEASE CONTACT THE NATIONAL WEATHER 
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR 
REPORTS TO CHS.SKYWARN@NOAA.GOV.

LAT...LON 3255 8148 3260 8139 3266 8148 3259 8156

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
350 PM EDT FRI MAY 4 2007

.SHORT TERM /TONIGHT THROUGH SATURDAY NIGHT/...
DIFFERENTIAL HEATING BOUNDARY DEVELOPED THIS AFTERNOON BETWEEN THE
CLOUD COVERED LOCATIONS TO THE NORTH IMPACTED BY THE SURFACE WEDGE
INLAND...AND AREAS TO THE SOUTH THAT WERE ABLE TO SCATTER OUT. FIRST
STORMS OF THE AFTERNOON HAVE THUS DEVELOPED AROUND EFFINGHAM COUNTY
AT THE INTERSECTION OF THIS DIFFERENTIAL HEATING BOUNDARY AND THE
SEABREEZE FRONT. WIDESPREAD CUMULUS IN THE SOUTHEAST GEORGIA
COUNTIES ARE EVIDENCE OF THE INSTABILITY PRESENT THAT MAY ASSIST IN
SPINNING UP A FEW MORE ISOLATED THUNDERSTORMS THROUGH THE AFTERNOON.

SURFACE HIGH TO THE NORTHEAST WILL MAINTAIN A WEDGE EAST OF THE
APPALACHIANS TONIGHT...WITH A WEAK FRONT DEPICTING THE SOUTHERN
EXTENT OF THE WEDGE LINGERING ACROSS THE FORECAST AREA. EXPECT
SHOWER CHANCES TO DIMINISH OVERNIGHT AS THE DAYTIME INSTABILITY AND
SEABREEZE FORCING ARE NO LONGER INFLUENTIAL.

THE SURFACE FRONTAL BOUNDARY RETREATS NORTHWARD EARLY SATURDAY...AS
THE INLAND WEDGE ERODES AHEAD OF A DEVELOPING WAVE OF LOW PRESSURE
TO THE WEST. AT THE SAME TIME...AN UPPER SHORTWAVE OVER THE OHIO
VALLEY WILL MERGE WITH THE SOUTHERN EDGE OF A DEEP TROUGH ALOFT OVER
THE NORTHEASTERN STATES. THE UPPER TROUGH THEN PUSHES SOUTHWARD AND
PROVIDES ENOUGH UPPER LEVEL ENERGY TO ALLOW THE SURFACE WAVE TO
INTENSIFY AS IT DROPS THROUGH THE CAROLINAS THROUGH SATURDAY NIGHT.

HAVE ADVERTISED BETTER CHANCES FOR SHOWERS AND THUNDERSTORMS
SATURDAY AFTERNOON IN COMPARISON TO THIS AFTERNOON...DUE TO MORE
CONDUCIVE UPPER DYNAMICS. BEST UPPER FORCING WILL INITIALLY BE TO
THE NORTH. HAVE THUS MENTIONED CHANCE THUNDERSTORMS MAINLY NORTH OF
SAVANNAH RIVER FOR THE AFTERNOON...WITH A SLIGHT CHANCE SOUTHERN
COUNTIES. LIMITING FACTORS FOR ANY STRONG CONVECTION WITH BE THE
PERSISTENT CLOUD COVER SUPPRESSING DAYTIME HEATING AND UNIMPRESSIVE
WIND FIELDS ALOFT.

GFS INDICATES THE CENTER OF THE SURFACE LOW MOVING OFFSHORE
APPROXIMATELY AT THE NC/SC BORDER EARLY SUNDAY MORNING...WITH NAM
BRINGING THE LOW OFFSHORE FURTHER TO THE NORTH. WILL SPREAD THE
CHANCE POPS OVER THE ENTIRE CWA BY SATURDAY EVENING BEGINS TO CROSS
THROUGH THE FORECAST AREA.

HIGH TEMPERATURES SATURDAY WILL RANGE FROM THE UPPER 70S NORTH TO
THE LOWER 80S IN THE SOUTHERN COUNTIES. OVERNIGHT CLOUDS BOTH
TONIGHT AND SATURDAY NIGHT WILL MAINTAIN LOW TEMPERATURES IN THE 60S.
&&

.LONG TERM /SUNDAY THROUGH FRIDAY/...THE UPR-LVL PATTERN WL REMAIN
HIGHLY AMPLIFIED ACROSS THE U.S. THROUGH MUCH OF THE XTNDD PERIOD. A
STRONG SHORTWAVE ROTATING CYCLONICALLY AROUND THE LARGE UPR LOW OVR
THE CANADIAN MARITIMES WL HELP DRIVE A LARGE CANADIAN ANTICYCLONE S
THROUGH THE CAROLINAS AND GA THIS WEEKEND. THE FNT IS XPCTD TO PUSH
INTO THE SC ZONES BY LTE SUN MRNG AND CLR OUR GA ZONES ALONG THE
ALTAMAHA RIVER DURING THE AFTN. GIVEN THE TIMING OF THE FNT...A
LARGE TEMP DIFFERENTIAL WL LIKELY BE FOUND ACROSS THE CWFA WITH
READINGS TOPPING OUT IN THE LWR-MID 70S ACROSS THE CHARLESTON
TRI-COUNTY AREA WARMING TO THE LWR-MID 80S ALONG THE ALTAMAHA RIVER.
THERE WL LIKELY BE ENOUGH LIFT AND LOW-LVL MOISTURE ALONG THE BNDRY
TO SUPPORT SCATTERED SHOWERS WITH A FEW TSTMS ACROSS SE GA WHERE THE
THERMODYNAMIC ENVIRONMENT WL BE MORE FAVORABLE FOR CONVECTION. PCPN
WL QUICKLY END FROM N-S SUN AFTN AS MUCH DRIER AND COOLER AIR
ADVECTS SOUTHWARD AS CYCLOGENESIS TAKES PLACE WELL OF THE SC COAST.

DRY CONDITIONS WL DOMINATE FOR THE REMAINDER OF THE FCST PERIOD WITH
HIGH PRES DOMINATING BOTH AT THE SFC AND ALOFT. TEMPS WL START THE
WEEK OUT WELL BELOW NORMAL THEN SLOWLY WARM BACK ABOVE NORMAL BY
WEEK/S END. LOWS MON MRNG COULD COME VERY CLOSE TO RECORD
TERRITORY...ESP AT SAV AND CHL.
&&

.MARINE...
WINDS OVER THE MARINE ZONES WILL REMAIN EAST TO NORTHEAST
TONIGHT...AS SURFACE HIGH PRESSURE CONTINUES TO RIDGE INLAND. THE
WEAK BOUNDARY OVER THE COASTAL WATERS REPRESENTING THE SOUTHERN
EXTENT OF THE INLAND WEDGE WILL RETREAT NORTHWARD ON
SATURDAY...ALLOWING WINDS TO VEER TO A MORE SOUTHEAST DIRECTION BY
THE AFTERNOON AND SOUTHERLY BY THE EVENING.

A STRONG CDFNT WL PUSH S ACROSS THE WTRS ON SUN AS STRONG HIGH PRES
BUILDS IN FROM THE N. STRONG CAA COUPLED WITH SST/S IN THE LWR-MID
70S WL SUPPORT DEEP MIXING PROFILES WITH WNDS AND SEAS LIKELY
PUSHING WELL INTO THE SCA RANGE BY MID AFTN ACROSS THE SC WTRS AND
LTE AFTN ACROSS THE GA WTRS. THERE IS EVEN A DISTINCT POSSIBILITY
THAT GALES MAY OCCUR OVR THE GA OFFSHORE WTRS AS THE PRES GRADIENT
BEGINS TO TIGHTEN WITH LOW PRES DVLPG OFF THE SC COAST. FCST
SOUNDINGS SUPPORT AT LEAST FREQUENT GUSTS IN EXCESS OF 34 KT SO
CONFIDENCE FOR GALE FORCE WNDS IS INCRG. PER COORD WITH OPC AND JAX
WL CAP WNDS AT 25-30 KT FOR NOW HWVR WL UPDATE THE HAZARDOUS WEATHER
OUTLOOK TO INCLUDE A POSSIBILITY FOR GALE CONDITIONS FOR AMZ374. THE
DVLPG NE FETCH WL SUPPORT RAPIDLY BUILDING SEAS SUN-MON. XPCT
COMBINED SEAS /THE COMBINATION OF WIND WAVE AND SWELL/ TO TOP OUT IN
THE 5-8 FT RANGE WITHIN 20 NM AND 10-13 FT ACROSS THE GA OFFSHORE
WTRS. ITS DOES APPEAR AS THOUGH AN EXTENDED SCA EVENT WL LIKELY
UNFOLD THROUGH ERLY NXT.
&&

.AVIATION /18Z-18Z/...
LOWER CLOUDS HAVE SCATTERED THIS AFTERNOON WITH HIGH CLOUDS
REMAINING OVER THE FORECAST AREA. A GENERALLY EAST ONSHORE FLOW
WILL CONTINUE AT BOTH TERMINALS THROUGH THE TAF PERIOD...WITH WINDS
DIMINISHING OVERNIGHT. SOMEWHAT UNCERTAIN ON THE EXTENT OF CIGS THIS
EVENING AND HAVE MAINTAINED SCATTERED TO BROKEN VFR CIGS THROUGH THE
EVENING. CONFIDENCE IS HIGHER THAT MVFR AND IFR CIG/VSBYS MAY
DEVELOP AFTER MIDNIGHT. MAV AND MET GUIDANCE AGREE ON LOWERED CIGS
AS SURFACE MOISTURE BECOMES TRAPPED UNDER THE INVERSION...WITH ONLY
MET INDICATING REDUCED VSBYS.

CONDITIONS EXPECTED TO IMPROVE SHORTLY AFTER SUNRISE AT BOTH KCHS
AND KSAV AS CIGS LIFT TO VFR.
&&

.LAKE WINDS...STRONG CAA AND WARM LAKE WATERS WL LIKELY SUPPORT LAKE
WIND ADVISORY CRITERIA ON LAKE MOULTRIE BY LATE SUN AFTN OR SUN
EVNG. WL INCLUDE A MENTION IN THE HAZARDOUS WEATHER OUTLOOK AT A
LAKE WIND ADVISORY MAY EVENTUALLY BE NEEDED.
&&

.HIGH SURF/RIP CURRENTS...THERE WL BE AN ENHANCED RISK FOR RIP
CURRENTS SUN AND MON ALONG THE BEACHES OF SRN SC AND SE GA. IN
ADDITION...BUILDING SEAS MAY SUPPORT HIGH SURF ADVISORY CONDITIONS
ACROSS PORTIONS OF THE COAST...ESP FROM EDISTO BEACH S TO THE
ALTAMAHA SOUND. WL ADDRESS BOTH HAZARDS IN THE HAZARDOUS WEATHER
OUTLOOK.
&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
SC...NONE.
MARINE...NONE.

&&

79/SBT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
330 AM EDT FRI MAY 4 2007

AMZ330-GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>051-
051030-
CHARLESTON HARBOR-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-
330 AM EDT FRI MAY 4 2007

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

.DAY ONE...TODAY AND TONIGHT.
.SMOKE...AREAS OF SMOKE FROM LARGE WILDFIRES IN SOUTHERN GEORGIA WILL
REDUCE VISIBILITIES AT TIMES.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

AMZ350-352-354-374-051030-
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-
330 AM EDT FRI MAY 4 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT.
.SMOKE...AREAS OF SMOKE FROM LARGE WILDFIRES IN SOUTHERN GEORGIA WILL
REDUCE VISIBILITIES AT TIMES.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
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
110 PM EDT FRI MAY 04 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 PM     WILDFIRE         NOBLE                   31.85N 81.93W
05/04/2007                   LONG               GA   PARK/FOREST SRVC

            DREGGERS WILDFIRE...OVER 1600 ACRES BURNED. FIRE 90 TO 95
            PERCENT CONTAINED. REPORTED BY GEORGIA FORESTRY
            COMMISSION.

0100 PM     WILDFIRE         4 SW BLOOMINGDALE       32.09N 81.35W
05/04/2007                   CHATHAM            GA   PARK/FOREST SRVC

            LITTLE NECK WILDFIRE...OVER 150 ACRES BURNED. FIRE 90 TO
            95 PERCENT CONTAINED. REPORTED BY GEORGIA FORESTRY
            COMMISSION.

0100 PM     WILDFIRE         LORENZO                 32.44N 81.38W
05/04/2007                   EFFINGHAM          GA   PARK/FOREST SRVC

            COURTYARD WILDFIRE...OVER 200 ACRES BURNED. FIRE 90
            PERCEN CONTAINED. REPORTED BY GEORGIA FORESTRY
            COMMISSION.

0100 PM     WILDFIRE         6 S EGYPT               32.37N 81.47W
05/04/2007                   EFFINGHAM          GA   PARK/FOREST SRVC

            RIVERSIDE DRIVE WILDFIRE...OVER 200 ACRES BURNED. FIRE 90
            PERCENT CONTAINED.

&&

ST

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
329 PM EDT FRI MAY 4 2007

GAZ101-042015-
EFFINGHAM-
329 PM EDT FRI MAY 4 2007

...STRONG THUNDERSTORMS WILL IMPACT EFFINGHAM COUNTY THROUGH 415 PM
EDT...

AT 327 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA SIZE HAIL...GUSTY WINDS
OF 35 TO 45 MPH...AND VERY HEAVY RAINFALL. THIS STORM WAS LOCATED
NEAR SPRINGFIELD. THIS STORM WAS NEARLY STATIONARY.

AREAS IN AND AROUND GUYTON AND SPRINGFIELD WILL BE IMPACTED THROUGH
415 PM EDT.

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE
AT 1-888-383-2024 IF YOU OBSERVE SEVERE WEATHER.