Severe Thunderstorm Warning 177, NWS Charleston, SC

000 
WWUS52 KCHS 300016
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
816 PM EDT SUN JUL 29 2007

GAC109-300045-
/O.CON.KCHS.SV.W.0177.000000T0000Z-070730T0045Z/
EVANS GA-
816 PM EDT SUN JUL 29 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR EVANS COUNTY...

AT 816 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM EDNA TO CLAXTON TO
DANIELS...MOVING EAST AT 15 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
BELLVILLE...CLAXTON...DAISY AND HAGAN.

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

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 3227 8202 3228 8189 3226 8188 3226 8186
      3222 8180 3212 8177 3209 8171 3205 8176
      3205 8190 3208 8198
TIME...MOT...LOC 0016Z 258DEG 16KT 3228 8188 3218 8185
          3207 8193

$$

000 
WWUS52 KCHS 300041
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
841 PM EDT SUN JUL 29 2007

GAC109-300051-
/O.EXP.KCHS.SV.W.0177.000000T0000Z-070730T0045Z/
EVANS GA-
841 PM EDT SUN JUL 29 2007

...THE SEVERE THUNDERSTORM WARNING FOR EVANS COUNTY WILL EXPIRE AT
845 PM EDT...

AT 839 PM EDT...RADAR INDICATED THAT THE SEVERE THUNDERSTORM WHICH
PROMPTED THE WARNING HAD MOVED OUT OF THE WARNED AREA...THUS THE
SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.

STAY TUNED TO NOAA WEATHER RADIO...TV OR YOUR LOCAL NEW SOURCE FOR
THE LATEST WEATHER INFORMATION. REPORT ANY SEVERE WEATHER OR STORM
RELATED DAMAGE TO LOCAL EMERGENCY MANAGEMENT OR LAW ENFORCEMENT
OFFICIALS AND ASK THEM TO IMMEDIATELY RELAY THE REPORT TO THE
NATIONAL WEATHER SERVICE IN CHARLESTON.

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 3227 8202 3228 8189 3226 8188 3226 8186
      3222 8180 3212 8177 3209 8171 3205 8176
      3205 8190 3208 8198
TIME...MOT...LOC 0041Z 258DEG 16KT 3229 8175 3219 8172
          3208 8180

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
742 PM EDT SUN JUL 29 2007

.SYNOPSIS...
A WEAK SURFACE TROUGH WILL REMAIN IN PLACE OVER THE REGION
TONIGHT AND MONDAY. THEN...THE TROUGH WILL SETTLE SOUTH AS A COOL
FRONT TUESDAY...STALLING OVER OR JUST SOUTH OF THE AREA BY
MIDWEEK...THEN DISSIPATING BY LATE WEEK. ATLANTIC HIGH PRESSURE
WILL THEN BUILD OVER THE REGION NEXT WEEKEND.

&&

.NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
CLOUDS HAD THINNED ACROSS S/W COUNTIES OF THE FORECAST AREA EARLIER...
ALLOWING DECENT SURFACE HEATING WITHIN AN ENVIRONMENT FEATURING
DEWPOINTS IN THE MID TO UPPER 70S. SBCAPES REACHED NEAR 3000-3500 J/KG
S/W OF A WEAK SURFACE BOUNDARY THAT REMAINED IN PLACE ACROSS
CENTRAL COUNTIES OF THE FORECAST AREA. CONVERGENCE ALONG THIS
BOUNDARY...THE SEA BREEZE BOUNDARY AND OUTFLOW FROM UPSTREAM THUNDERSTORMS
ALLOWED FOR THE DEVELOPMENT OF NUMEROUS SHOWERS AND THUNDERSTORMS
ACROSS SOUTHERN PORTIONS OF THE FORECAST AREA. EXPECT THIS
ACTIVITY TO PERSIST INTO THE OVERNIGHT HOURS...ALTHOUGH THE THREAT FOR
ISOLATED DAMAGING WIND GUSTS AND HAIL SHOULD DECREASE AS THE
EVENING PROGRESSES.

&&

.SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/...
AFTER A LULL IN PRECIP LATE TONIGHT/EARLY MONDAY...PRECIPITATION
COVERAGE SHOULD INCREASE BY MIDDAY. A SHORTWAVE WILL PUSH INTO THE
REGION FROM THE NW DURING THE AFTERNOON. SYNOPTIC ASCENT
ASSOCIATED WITH THIS FEATURE WILL OVERSPREAD AN ENVIRONMENT
FEATURING AT LEAST MODERATE INSTABILITY. THIS SHORTWAVE MAY
SUPPORT WEAK SURFACE CYCLOGENESIS OVER OR CLOSE TO NORTHERN
COUNTIES...AND THE RESULTING WAVE WILL PUSH THE SYNOPTIC SURFACE
TROUGH SOUTH AS A COOL FRONT. THIS SCENARIO SHOULD SUPPORT AT
LEAST NUMEROUS SHOWERS/THUNDERSTORMS BY AFTERNOON...THUS CONTINUED
ONGOING LIKELY POPS. TIMING/LOCATION OF CONVECTIVE INITIATION
REMAINS UNCLEAR WITHIN A COMPLEX MESOSCALE ENVIRONMENT...FEATURING
A SEA BREEZE BOUNDARY THAT WILL STRUGGLE TO PUSH INLAND...RESIDUAL
OUTFLOW BOUNDARIES AND PERHAPS EVEN DIFFERENTIAL HEATING
BOUNDARIES DEPENDANT ON CLOUD COVER. FURTHER...THE SEVERE THREAT
WILL DEPEND GREATLY ON CLOUD COVER...WITH SUFFICIENT INSOLATION
SBCAPES COULD PUSH INTO THE 3000-4000 J/KG RANGE...SUPPORTING A
DECENT POTENTIAL FOR SEVERE WEATHER DURING THE AFTERNOON/EARLY
EVENING. HOWEVER...IF CLOUD COVER REMAINS EXTENSIVE...THE PRIMARY
THREATS WITH THUNDERSTORMS WILL BE LOCALLY EXCESSIVE RAINFALL
AND FREQUENT LIGHTNING. SHOWERS/THUNDERSTORMS WILL THEN PERSIST
INTO MONDAY NIGHT...BEFORE DIMINISHING IN THE WAKE OF THE SHORTWAVE/
PER DIURNAL TRENDS OVERNIGHT.

&&

.LONG TERM /TUESDAY THROUGH SUNDAY/...
THE GFS INDICATES A FRONTAL BOUNDARY WILL PUSH SOUTH ACROSS THE AREA
THROUGH MID WEEK. THE BOUNDARY WILL THEN STALL OVER THE AREA THROUGH
FRIDAY AS HIGH PRESSURE SLOWLY BUILDS INTO THE AREA FROM THE
NORTHWEST FOR THE WEEKEND.

TEMPS SHOULD REMAIN IN THE UPPER 80S TO LOWER 90S INLAND TO MID 80S
ALONG THE COAST. THIS IS DUE TO THE PRESENCE OF CLOUD COVER AND THE
ABOVE NORMAL CHANCE OF SHOWERS.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
SCATTERED SHOWERS IN THE VICINITY OF KSAV MAY PERSIST THROUGH
02Z...ALTHOUGH A BRIEF SHOWER AT THE TERMINAL RESULTING IN MVFR
CONDITIONS CANNOT BE RULED OUT DURING THAT TIME. SATELLITE IMAGERY
SHOWS SOME BREAKS IN THE CLOUD COVER NORTH OF THE CONVECTION...AND THE
BROKEN MID-HIGH LEVEL CLOUD COVER OVER THE TERMINALS MAY BECOME
SCATTERED FOR A PERIOD LATER TONIGHT...ESPECIALLY AT KCHS WHERE
LESS IN THE WAY OF DEBRIS CLOUDINESS IS EXPECTED. THIS GIVES SOME
CONCERN TO THE FOG POTENTIAL GIVEN THE LIGHT WINDS EXPECTED. HAVE
THEREFORE INDICATED MVFR VISIBILITIES AT BOTH TERMINALS FROM
09-13Z IN A TEMPO GROUP.

EXPECT NUMEROUS THUNDERSTORMS IN THE REGION MONDAY. HAVE INDICATED
SHOWERS IN THE VICINITY OF BOTH TERMINALS STARTING AT 16Z WITH
THUNDER IN THE VICINITY AFTER 19Z. MVFR OR IFR CONDITIONS WOULD BE
POSSIBLE IN ANY THUNDERSTORMS.

EXTENDED AVIATION OUTLOOK...WE WILL EXPERIENCE AN OCCASIONAL PERIOD
OF AT LEAST MVFR CONDITIONS IN AFTERNOON/EVENING TSTMS AND PERHAPS
IN LIGHT FOG DURING LATE NIGHT/EARLY MORNING PERIODS THROUGHOUT
THE WEEK. OTHERWISE CONDITIONS WILL BE VFR.

&&

.MARINE...
THE UNCERTAIN POSITION OF THE SURFACE TROUGH...PER 12Z GFS/NAM
DISAGREEMENT...WILL PROVIDE TRICKY WIND FORECASTS THROUGH
MONDAY. S/E OF THE BOUNDARY...SW WINDS MAY AGAIN SURGE FOR A
PERIOD TONIGHT...WILL NEED TO MONITOR FOR POTENTIAL OF SCSEC
CONDITIONS ACROSS THE OUTER GA WATERS. THEN...THUNDERSTORMS MONDAY
AFTERNOON/EVENING COULD PRODUCE STRONG WIND GUSTS. TIMING OF COOL
FROPA MONDAY NIGHT REMAINS UNCERTAIN...BUT WINDS/SEAS SHOULD
REMAIN BELOW HEADLINE CRITERIA.

THE WINDS AND SEAS ARE EXPECTED TO REMAIN BELOW ADVISORY CRITERIA
THROUGH THE WEEK. SLIGHT SURGES ARE POSSIBLE DUE TO DIURNAL EFFECTS
ALONG WITH THE SHOWER/THUNDERSTORM POTENTIAL ACROSS THE COASTAL
WATERS FOR THE REMAINDER OF THE WEEK. SEAS WILL GENERALLY REMAIN 2
TO 4 FEET WITH HIGHER SEAS IN/NEAR THUNDERSTORMS.

RIP CURRENTS...OBSERVATIONS CONCUR THE SWELLS REMAINING AROUND 2 FT
EVERY 9-10 SECONDS...BUT DUE TO LACK OF RIP CURRENT REPORTS TODAY
AND THE LOCAL WORKSHEET PARAMETERS ARE NOT INDICATING ANYTHING
HIGHER THAN LOW RISK. THEREFORE...WILL MAINTAIN LOW RISK FOR
TOMORROW.

&&

.TIDES/COASTAL FLOODING...
WILL MONITOR ASTRONOMICAL HIGH TIDES THIS EVENING THROUGH
TUESDAY EVENING. IF HEAVY RAINS COINCIDE WITH THE TIMING OF THE
EVENING HIGH TIDE...LOCAL FLOODING MAY OCCUR IN COASTAL COUNTIES.

&&

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

&&

SRP/REV/JAQ

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CHARLESTON SC
427 PM EDT SUN JUL 29 2007

GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>051-301000-
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-
427 PM EDT SUN JUL 29 2007

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

.DAY ONE...TONIGHT.

STRONG/SEVERE THUNDERSTORMS...ISOLATED THUNDERSTORMS MAY PRODUCE
DAMAGING WIND GUSTS TO 60 MPH AND HAIL AT LEAST THE SIZE OF
PENNIES UNTIL MIDNIGHT...ESPECIALLY WITHIN COUNTIES ALONG AND
SOUTH OF THE SAVANNAH RIVER. ALSO...SOME THUNDERSTORMS WILL
PRODUCE VERY HEAVY RAIN...POSSIBLY RESULTING IN LOCALIZED
FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

STRONG/SEVERE THUNDERSTORMS...NUMEROUS THUNDERSTORMS WILL AFFECT
THE AREA MONDAY. A FEW OF THESE STORMS WILL BECOME STRONG...WITH
GUSTY WINDS AND FREQUENT LIGHTNING STRIKES. ALSO...ISOLATED STORMS
MAY BECOME SEVERE...WITH DAMAGING WINDS AND LARGE HAIL. IF SUNSHINE
ALLOWS SUFFICIENT WARMING BEFORE THUNDERSTORMS DEVELOP...THE
THREAT FOR SEVERE WEATHER WILL INCREASE. IN ADDITION...SOME
THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN...POSSIBLY RESULTING
IN LOCALIZED FLOODING.

THERE WILL BE LESS COVERAGE OF THUNDERSTORMS TUESDAY...BUT A FEW
OF THE STORMS STILL COULD BECOME STRONG OR SEVERE...ESPECIALLY
ACROSS SOUTHEAST GEORGIA. GUSTY WINDS...LIGHTNING STRIKES...SMALL
HAIL AND HEAVY RAINS ARE POSSIBLE IN THESE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

AMZ330-350-352-354-374-301000-
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-
427 PM EDT SUN JUL 29 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...TONIGHT.

STRONG THUNDERSTORMS...ISOLATED THUNDERSTORMS TODAY INTO TONIGHT MAY
PRODUCE GUSTY WINDS...FREQUENT LIGHTNING STRIKES...VERY HEAVY RAINS
REDUCING VISIBILITIES UNDER 1/2 MILE AND WATERSPOUTS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

STRONG THUNDERSTORMS...ISOLATED THUNDERSTORMS MONDAY AND TUESDAY MAY
PRODUCE GUSTY WINDS...FREQUENT LIGHTNING STRIKES AND VERY HEAVY
RAINS REDUCING VISIBILITIES UNDER 1/2 MILE.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
603 PM EDT SUN JUL 29 2007

GAZ137-292245-
LONG-
603 PM EDT SUN JUL 29 2007

...STRONG THUNDERSTORMS WILL IMPACT LONG COUNTY THROUGH 645 PM EDT...

AT 603 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA SIZE HAIL...AND GUSTY
WINDS OF 35 TO 45 MPH.  THIS STORM WAS LOCATED NEAR LUDOWICI. THIS
STORM WAS NEARLY STATIONARY.

AREAS IN AND AROUND LUDOWICI WILL BE IMPACTED THROUGH 645 PM EDT.

EXCESSIVE CLOUD-TO-GROUND LIGHTNING CAN BE EXPECTED. POSTPONE OUTDOOR
ACTIVITIES PROMPTLY. GO QUICKLY INSIDE A COMPLETELY ENCLOSED
BUILDING.

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.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
658 PM EDT SUN JUL 29 2007

GAZ114-292345-
TATTNALL-
658 PM EDT SUN JUL 29 2007

...STRONG THUNDERSTORMS WILL IMPACT TATTNALL COUNTY THROUGH 745 PM
EDT...

AT 658 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING 1/2 INCH HAIL...AND GUSTY
WINDS OF 35 TO 45 MPH.  THIS STORM WAS LOCATED NEAR LYNN...OR ABOUT
12 MILES SOUTH OF CLAXTON...MOVING NORTHEAST AT 10 MPH.

AREAS IN AND AROUND GLENNVILLE...MENDES AND MIDWAY WILL BE IMPACTED
THROUGH 745 PM EDT.

EXCESSIVE CLOUD-TO-GROUND LIGHTNING CAN BE EXPECTED. POSTPONE OUTDOOR
ACTIVITIES PROMPTLY. GO QUICKLY INSIDE A COMPLETELY ENCLOSED
BUILDING.

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.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
748 PM EDT SUN JUL 29 2007

GAZ115-300030-
EVANS-
748 PM EDT SUN JUL 29 2007

...STRONG THUNDERSTORMS WILL IMPACT EVANS COUNTY THROUGH 830 PM
EDT...

AT 748 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING 1/2 INCH HAIL...AND
GUSTY WINDS OF 35 TO 45 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES WEST OF UNDINE TO 6 MILES WEST OF DANIELS...OR
ALONG A LINE EXTENDING FROM 11 MILES SOUTH OF METTER TO REIDSVILLE...
MOVING EAST AT 20 MPH.

AREAS IN AND AROUND BELLVILLE...CLAXTON...DAISY AND HAGAN WILL BE
IMPACTED THROUGH 830 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.