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000 

WWUS20 KWNS 121222

SEL4

SPC WW 121222

FLZ000-GAZ000-CWZ000-122000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 384

NWS STORM PREDICTION CENTER NORMAN OK

820 AM EDT TUE JUN 12 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN FLORIDA

       SOUTHEASTERN GEORGIA

       COASTAL WATERS



EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 820 AM UNTIL

400 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 70

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

NORTHEAST OF VALDOSTA GEORGIA TO 35 MILES EAST SOUTHEAST OF OCALA

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.



DISCUSSION...CONVECTIVE CLUSTER CONTINUES TO EXPAND IN AREAL

COVERAGE AHEAD OF UPPER SHORTWAVE TROUGH DIGGING SEWD ACROSS GA THIS

MORNING.  AS BOUNDARY LAYER WARMS AND INSTABILITY

INCREASES...THUNDERSTORMS SHOULD INCREASE IN INTENSITY AS THEY

SPREAD/DEVELOP SEWD ACROSS THE NRN FL PENINSULA.  LARGE HAIL AND

DAMAGING WINDS ARE THE PRIMARY SEVERE THREATS.



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 550. MEAN STORM

MOTION VECTOR 34025.





...DARROW

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