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000 

WWUS20 KWNS 131530

SEL1

SPC WW 131530

FLZ000-GAZ000-CWZ000-132300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 391

NWS STORM PREDICTION CENTER NORMAN OK

1130 AM EDT WED JUN 13 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF THE NORTHERN AND CENTRAL FLORIDA PENINSULA

       PARTS OF SOUTHEAST GEORGIA

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1130 AM UNTIL

700 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 55

STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES NORTH OF

WAYCROSS GEORGIA TO 40 MILES SOUTHWEST OF MELBOURNE FLORIDA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



DISCUSSION...COLD UPPER VORT SERN GA CONTINUES MOVING SEWD AND WILL

AID IN DEVELOPMENT OF SEVERE THUNDERSTORMS THIS AFTERNOON SWD TO

CENTRAL FL.  WITH MLCAPES CLIMBING TO AOA 2000 J/KG AND 30KT OF DEEP

LAYER SHEAR...A FEW SUPERCELLS ARE POSSIBLE...PARTICULARLY VICINITY

E COAST SEA BREEZE FRONT.  PRIMARY THREAT WILL BE LARGE HAIL AND

DOWNBURSTS.



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 27020.





...HALES

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