Severe Thunderstorm Warning 104, NWS Charleston, SC

000 
WWUS52 KCHS 211924
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
323 PM EDT WED MAY 21 2008

211933-
/O.CAN.KCHS.SV.W.0104.000000T0000Z-080521T1930Z/

323 PM EDT WED MAY 21 2008

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

TO REPORT SEVERE WEATHER SUCH AS HAIL...DOWNED TREES...LIMBS...AND
POWER LINES...PLEASE CONTACT THE CHARLESTON NATIONAL WEATHER SERVICE
TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR REPORTS TO
CHS.SKYWARN@NOAA.GOV.

LAT...LON 3131 8132 3131 8136 3137 8155 3140 8158
      3150 8154 3157 8127 3157 8121 3155 8124
      3155 8125 3155 8118 3153 8117 3137 8127
      3133 8126 3129 8129
TIME...MOT...LOC 1923Z 266DEG 29KT 3146 8141

$$

GAC191-211930-
/O.CON.KCHS.SV.W.0104.000000T0000Z-080521T1930Z/
MCINTOSH GA-
323 PM EDT WED MAY 21 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHERN MCINTOSH COUNTY...

AT 319 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ARDICK...OR ABOUT 6 MILES NORTH OF DARIEN...MOVING EAST
AT 33 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
CARNIGAN...CRESCENT...DARIEN...EULONIA...MERIDIAN...RIDGEVILLE...
SAPELO ISLAND AND VALONA.

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

TO REPORT SEVERE WEATHER SUCH AS HAIL...DOWNED TREES...LIMBS...AND
POWER LINES...PLEASE CONTACT THE CHARLESTON NATIONAL WEATHER SERVICE
TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR REPORTS TO
CHS.SKYWARN@NOAA.GOV.

LAT...LON 3131 8132 3131 8136 3137 8155 3140 8158
      3150 8154 3157 8127 3157 8121 3155 8124
      3155 8125 3155 8118 3153 8117 3137 8127
      3133 8126 3129 8129
TIME...MOT...LOC 1923Z 266DEG 29KT 3146 8141

$$

33

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
233 PM EDT WED MAY 21 2008

.SYNOPSIS...
A COLD FRONT WILL PUSH THROUGH THE AREA FROM THE NORTH TODAY AND
STALL JUST SOUTH OF THE AREA. ANOTHER FRONT WILL DROP THROUGH THE
AREA ON FRIDAY WITH HIGH PRESSURE RETURNING FOR THE WEEKEND.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
UPDATE...THE STORM PREDICTION CENTER HAS ISSUED SEVERE
THUNDERSTORM WATCH 332 FOR PART OF SOUTHEAST GEORGIA AND THE
NEARBY COASTAL WATERS UNTIL 10 PM EDT. THE UPDATED FORECAST
PRODUCTS WILL BE OUT SHORTLY.

BACKDOOR FRONT CONTINUES TO TRY TO DROP SOUTH THROUGH THE AREA
THIS AFTERNOON BUT IT APPEARS AS THOUGH IT IS STUCK FROM NEAR
STATESBORO TO BEAUFORT AS INDICATED BY THE CU FIELD S OF THIS
LINE. DEEP WESTERLY FLOW AND UPPER RIDGING TO THE WEST WILL ALLOW
FOR ANOTHER WARM DAY ACROSS THE AREA...WITH TEMPERATURES REACHING
INTO THE UPPER 80S IN SOME LOCALES...ESPECIALLY IN AREAS THAT SEE
THE LEAST CLOUD COVER. DEWPOINTS WILL MIX DOWN INTO THE UPPER 50S
BEHIND THE FRONT IN SOUTH CAROLINA...WHILE LOW TO MID 60 DEWPOINTS
WILL BE MAINTAINED NEAR AND SOUTH OF THE FRONT.

MAIN CONCERN FOR TODAY WILL BE ANY CONVECTIVE DEVELOPMENT ALONG
AND TO THE SOUTH OF THE LINGERING FRONTAL BOUNDARY THIS AFTERNOON.
NAM AND GFS AGREE IN SHOWING MODERATE INSTABILITY IN THE PROXIMITY
OF THE FRONTAL BOUNDARY APPROXIMATELY FROM TATTNALL COUNTY TO SOUTHERN
BEAUFORT AND SOUTHWARD...WITH CAPE VALUES BETWEEN 1000 AND 1600 J/KG
AND LIFTED INDICES DOWN TO AROUND -4. WEAKER MID-LEVEL LAPSE RATES
COMPARED TO YESTERDAY AND LESS SHORTWAVE ENERGY SUGGESTS THAT
WIDESPREAD SEVERE WEATHER IS NOT LIKELY. ISOLATED SHOWERS AND
THUNDERSTORMS ARE POSSIBLE IN THE SOUTHEAST GEORGIA ZONES NEAREST
TO THE LINGERING BOUNDARY...WHERE INSTABILITY AND MOISTURE
CONVERGENCE WILL BE MAXIMIZED. SPC HAS ONLY PLACED MCINTOSH COUNTY
INTO THE DAY 1 SLIGHT RISK AREA. AWAY FROM THE LINGERING
FRONT...DEEP WESTERLY FLOW WILL LIKELY CUT OFF DEEP MOISTURE
ACCESS AND SUPPRESS SHOWER AND THUNDERSTORM DEVELOPMENT TODAY.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM THURSDAY/...
DRIER AIR WILL FILTER INTO MUCH OF THE FORECAST AREA BY THIS
EVENING. UPPER RIDGING INDUCED SUBSIDENCE SHOULD YIELD CLEAR OR
MOSTLY CLEAR SKIES OVERNIGHT WHILE HIGH PRESSURE BUILDING IN AT
THE SURFACE WILL ALLOW WINDS TO DROP OFF. IDEAL RADIATIONAL
COOLING CONDITIONS EXPECTED TO BRING AN UNSEASONABLY COOL NIGHT TO
NORTHERN AREAS WITH LOWS DROPPING INTO THE MID 50S.

&&

.LONG TERM /THURSDAY THROUGH TUESDAY/...
OMEGA BLOCK PATTERN LATE THIS WEEK INTO EARLY NEXT WEEK...WITH THE
MEAN RIDGING ALOFT TO OUR W AND THE MEAN TROUGH OVER OUR AREA OR
JUST TO THE E. A COMPLICATED FORECAST SCENARIO SHAPING UP DURING
THIS TIME...WITH A QUASI-STATIONARY BOUNDARY WAVERING ACROSS OUR FA
UNTIL THE WEEKEND WHEN HIGH PRES BUILDS OVER THE MID ATLC STATES
DISPLACING THE FRONT WELL S INTO FLORIDA.

WE WERE ABLE TO KEEP THU MAINLY DRY ALTHOUGH SOME LATE DAY TSTMS
MAY CROP UP ALONG AND S OF INTERSTATE 16 IN GEORGIA. AN INCREASING
UNSTABLE AIR MASS WILL LIFT NORTHWARD AHEAD OF A SHORT WAVE MOVING
ALONG THE SRN GULF COAST REGION.

FRI STILL LOOKS POTENTIALLY UNSETTLED ACROSS THE AREA WITH A
POSSIBLE CONVECTIVE COMPLEX MOVING THROUGH S GEORGIA IN A REGION
OF STRONG LOW LEVEL FORCING AND ENHANCED 40-50 KT MID LEVEL FLOW.
THE GFS IS THE FASTEST WITH THIS FEATURE...BUT MOST OF THE MODELS
ARE AT LEAST INDICATING A SUBSTANTIAL CONVECTIVE BURST DESPITE
TIMING DIFFERENCES. AFTER THIS WAVE MOVES EAST OF THE GEORGIA
COAST EARLY IN THE WEEKEND...A BACKDOOR FRONT WILL MAKE A MOVE
S...WITH HIGHS ONLY IN THE 70S ON SAT ACROSS SOUTH CAROLINA. THE
FRONT WILL PASS S OF THE REGION THIS WEEKEND WITH A CHANCE OF
SHOWERS AND TSTMS SAT ENDING FROM N TO S ON SAT NIGHT.

HIGH PRES WILL TAKE CONTROL SUN INTO EARLY NEXT WEEK WITH A
DRY PATTERN DEVELOPING AND TEMPERATURES NOT FAR FROM CLIMO.

&&

.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
VFR CONDITIONS AT THE TAF SITES THROUGH THE PERIOD. ONLY A BIT OF
CUMULUS EXPECTED AT THE TERMS THIS AFTERNOON...MAINLY AT KSAV
WHERE MORE LOW-LEVEL MOISTURE IS FOUND. ISOLATED SH/TSTMS ARE
POSSIBLE ACROSS SE GA THIS AFTN/EVE BUT CHANCES ARE THAT THEY WILL
BE S OF KSAV SO WILL NOT MENTION IN THE 18Z TAFS.

EXTENDED AVIATION OUTLOOK...UNSETTLED CONDITIONS THURSDAY NIGHT
THROUGH SATURDAY...WITH PERIODS OF MVFR WEATHER LIKELY DURING THAT
TIME.

&&

.MARINE...
WINDS OVER THE COASTAL WATERS WILL CONTINUE TO DIMINISH THROUGHOUT
THE DAY...AS THE LOW LEVEL JET PUSHES FURTHER OFFSHORE. HAVE ALLOWED
THE SMALL CRAFT ADVISORY FOR THE OUTER GEORGIA WATERS TO EXPIRE AT
11 AM...AS LATEST OFFSHORE TOWER OBSERVATIONS ARE DOWN TO AROUND
20 KT. SEABREEZE FORMATION THIS AFTERNOON WILL ALLOW WINDS IN THE
HARBOR TO SURGE TO NEAR 15 KT FOR A FEW HOURS. RATHER BENIGN
CONDITIONS ELSEWHERE THROUGH TONIGHT.

A WEAK PRESSURE PATTERN THU INTO FRI WITH DIURNAL SEA BREEZE
OSCILLATIONS NEAR SHORE. WINDS AND SEAS BELOW SMALL CRAFT ADVISORY
CRITERIA.

A BACKDOOR FRONTAL SURGE WILL MOVE S THROUGH THE WATERS FRI NIGHT
AND SAT WITH NE FLOW ON THE INCREASE AND BUILDING SEAS FROM N TO
S THROUGH THE S CAROLINA WATERS. NE SURGE SHOULD INCREASE MORE
IN THE SAT NIGHT AND SUN TIME FRAME FOR OUR GEORGIA WATERS AS
SURFACE HIGH PRES BUILDS OVER THE SOUTHERN MID ATLC REGION. WE
BACKED OFF ON SCA CONDITIONS IN OUR GEORGIA WATERS ON SAT UNTIL
LATE DAY. ONSHORE FLOW SHOULD MAINTAIN SCA OR NEAR SCA ALL WATERS
ON SUN.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...SEVERE THUNDERSTORM WATCH UNTIL 10 PM EDT THIS EVENING FOR
     GAZ116>119-137>141.
SC...NONE.
MARINE...SEVERE THUNDERSTORM WATCH UNTIL 10 PM EDT THIS EVENING FOR
     AMZ354.

&&

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CHARLESTON SC
248 PM EDT WED MAY 21 2008

GAZ087-088-099>101-114-115-SCZ040-042>045-047>051-220300-
JENKINS-SCREVEN-CANDLER-BULLOCH-EFFINGHAM-TATTNALL-EVANS-ALLENDALE-
HAMPTON-INLAND COLLETON-DORCHESTER-BERKELEY-INLAND JASPER-BEAUFORT-
COASTAL COLLETON-CHARLESTON-COASTAL JASPER-
248 PM EDT WED MAY 21 2008

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.

GAZ116>119-137>141-220300-
INLAND BRYAN-COASTAL BRYAN-INLAND CHATHAM-COASTAL CHATHAM-LONG-
INLAND LIBERTY-COASTAL LIBERTY-INLAND MCINTOSH-COASTAL MCINTOSH-
248 PM EDT WED MAY 21 2008

...SEVERE THUNDERSTORM WATCH 332 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST GEORGIA.

.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.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

SEVERE THUNDERSTORMS...SCATTERED SHOWERS AND THUNDERSTORMS ARE
EXPECTED TO DEVELOP THIS AFTERNOON AND CONTINUE INTO EARLY EVENING
ACROSS EXTREME PARTS OF SOUTHEAST GEORGIA. DUE TO THE STRONG
INSTABILITY AND DEEP LAYER SHEAR IN PLACE SOME OF THESE STORMS
MAY BE SEVERE WITH DAMAGING WINDS AND LARGE HAIL THE MAIN HAZARDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

AMZ330-350-352-374-220300-
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 EXTENDING FROM 20 TO
60 NM-
248 PM EDT WED MAY 21 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.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.

AMZ354-220300-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM...INCLUDING
GRAYS REEF NATIONAL MARINE SANCTUARY-
248 PM EDT WED MAY 21 2008

...SEVERE THUNDERSTORM WATCH 332 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

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.

   SEVERE THUNDERSTORM WATCH.

SEVERE THUNDERSTORMS...SCATTERED SHOWERS AND THUNDERSTORMS ARE
EXPECTED TO DEVELOP THIS AFTERNOON AND CONTINUE INTO EARLY EVENING
ACROSS EXTREME PARTS OF SOUTHEAST GEORGIA...WHICH WILL MOVE INTO
THE NEARBY COASTAL WATERS. DUE TO THE STRONG INSTABILITY AND DEEP
LAYER SHEAR IN PLACE SOME OF THESE STORMS MAY BE SEVERE WITH
DAMAGING WINDS AND LARGE HAIL THE MAIN HAZARDS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHARLESTON SC
155 PM EDT WED MAY 21 2008

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

0744 PM     HAIL             3 W WALTERBORO          32.90N 80.72W
05/20/2008  E0.88 INCH       COLLETON           SC   TRAINED SPOTTER

            TIME OF EVENT CORRECTED.

&&

MTE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
207 PM EDT WED MAY 21 2008

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

0620 PM     TSTM WND DMG     SUMMERVILLE             33.02N 80.18W
05/20/2008                   DORCHESTER         SC   PUBLIC

            40 FOOT MAPLE TREE BLOWN DOWN. CORRECTED TIME FROM
            PREVIOUS REPORT.

&&

MTE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
233 PM EDT WED MAY 21 2008

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

1055 PM     TSTM WND DMG     1 NW NIXVILLE           32.75N 81.16W
05/20/2008                   HAMPTON            SC   TRAINED SPOTTER

            SEVERAL 2 TO 3 INCH DIAMETER TREE LIMBS DOWN.

1035 PM     TSTM WND DMG     7 ESE SYLVANIA          32.71N 81.53W
05/20/2008                   SCREVEN            GA   TRAINED SPOTTER

            TREES AND LIMBS BLOWN DOWN.

0719 PM     HAIL             MILLEN                  32.80N 81.95W
05/20/2008  E1.75 INCH       JENKINS            GA   POST OFFICE

0745 PM     HAIL             7 ESE SYLVANIA          32.71N 81.53W
05/20/2008  E1.75 INCH       SCREVEN            GA   TRAINED SPOTTER

&&

MTE

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
237 PM EDT WED MAY 21 2008

GAZ137>141-211900-
COASTAL LIBERTY-COASTAL MCINTOSH-INLAND LIBERTY-INLAND MCINTOSH-LONG-
237 PM EDT WED MAY 21 2008

...STRONG THUNDERSTORMS WILL IMPACT LONG COUNTY...MCINTOSH COUNTY AND
LIBERTY COUNTY THROUGH 300 PM EDT...

AT 232 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING 1/2 INCH HAIL...AND STRONG
WINDS OF 40 TO 50 MPH.  THIS STORM WAS LOCATED NEAR BRICKSTON...OR
ABOUT 12 MILES SOUTHEAST OF LUDOWICI...MOVING EAST AT 44 MPH.

AREAS IN AND AROUND CARNIGAN...CRESCENT...EULONIA...JONES...
MERIDIAN...PINE HARBOR...SAPELO ISLAND...SHELLMAN BLUFF...SOUTH
NEWPORT...TOWNSEND AND VALONA WILL BE IMPACTED THROUGH 300 PM EDT.

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.

PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE
AT 1-888-383-2024 IF YOU OBSERVE SEVERE WEATHER SUCH AS HAIL...DOWNED
TREES...LIMBS AND POWER LINES.

33

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
300 PM EDT WED MAY 21 2008

GAZ138>141-211930-
COASTAL LIBERTY-COASTAL MCINTOSH-INLAND LIBERTY-INLAND MCINTOSH-
300 PM EDT WED MAY 21 2008

...STRONG THUNDERSTORMS WILL IMPACT MCINTOSH COUNTY AND LIBERTY
COUNTY THROUGH 330 PM EDT...

AT 256 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 WARSAW TO 7 MILES NORTH OF SAPELO ISLAND...OR ALONG A
LINE EXTENDING FROM 15 MILES NORTH OF DARIEN TO 20 MILES NORTHEAST OF
DARIEN...MOVING EAST AT 33 MPH.

AREAS IN AND AROUND PINE HARBOR...SAPELO ISLAND...SHELLMAN BLUFF AND
SOUTH NEWPORT WILL BE IMPACTED THROUGH 330 PM EDT.

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.

PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE
AT 1-888-383-2024 IF YOU OBSERVE SEVERE WEATHER SUCH AS HAIL...DOWNED
TREES...LIMBS AND POWER LINES.

33