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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 254

NWS STORM PREDICTION CENTER NORMAN OK

950 AM EDT THU APR 28 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN FLORIDA

       SOUTHEAST GEORGIA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 950 AM UNTIL

500 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH

NORTHEAST OF BRUNSWICK GEORGIA TO 20 MILES SOUTHWEST OF CROSS

CITY FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 249...WW 250...WW

251...WW 252...WW 253...



DISCUSSION...STRONG TO SEVERE FRONTAL CONVECTION CURRENTLY DRAPED

ACROSS THE EASTERN FL PANHANDLE INTO SOUTHERN GA WILL ADVANCE TOWARD

THE ATLANTIC COAST INTO THE EARLY AFTERNOON HOURS.  ADDITIONAL

HEATING DOWNSTREAM OVER THE NRN PENINSULA WILL ENHANCE THE RISK FOR

FURTHER DEVELOPMENT ALONG WITH AN ATTENDANT THREAT FOR DAMAGING

WINDS AND LARGE HAIL.



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 24030.





...DARROW/HART

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