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000 

WWUS20 KWNS 291736

SEL0

SPC WW 291736

GAZ000-NCZ000-SCZ000-CWZ000-300100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 640

NWS STORM PREDICTION CENTER NORMAN OK

140 PM EDT SUN JUN 29 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF SOUTHEAST GEORGIA

       LARGE PART OF CENTRAL NORTH CAROLINA

       MUCH OF SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 140 PM UNTIL 900

PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95

STATUTE MILES EAST AND WEST OF A LINE FROM 10 MILES EAST

SOUTHEAST OF SAVANNAH GEORGIA TO 45 MILES NORTHEAST OF GREENSBORO

NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 637...WW 638...WW 639...



DISCUSSION...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY

ACROSS THE WATCH THIS AFTERNOON AS AIR MASS NOW MDTLY UNSTABLE WITH

LITTLE REMAINING CINH.  WITH 30KT OF MID LEVEL FLOW COUPLE WITH

STEEP LOW LEVEL LAPSE RATES DAMAGING WINDS WILL BE PRIMARY CONCERN

AS STORMS EVOLVE INTO FORWARD PROPAGATING CLUSTERS AND LINE

SEGMENTS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25030.





...HALES

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