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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 792

NWS STORM PREDICTION CENTER NORMAN OK

745 PM EST WED DEC 2 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND NORTHERN FLORIDA

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 745 PM

UNTIL 400 AM EST.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES EITHER SIDE OF A LINE FROM 30 MILES WEST SOUTHWEST OF

SARASOTA FLORIDA TO 40 MILES EAST SOUTHEAST OF ST AUGUSTINE

FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 789...WW 790...WW 791...



DISCUSSION...TSTMS EXPECTED TO PERSIST ALONG ERN GULF OF MEXICO/N FL

COLD FRONT INTO EARLY THU.  BOTH LOW LVL AND DEEP SHEAR GRADUALLY

WILL DECREASE WITH TIME.  BUT SHEAR LIKELY WILL REMAIN SUFFICIENT

FOR SUPERCELLS FOR AT LEAST THE NEXT SEVERAL HOURS.  COUPLED WITH

CONTINUING PRESENCE OF MODERATE SFC-BASED INSTABILITY...HI PW...AND

RELATIVELY WEAK LINEAR FORCING FOR ASCENT...SETUP MAY SUPPORT A

CONTINUED RISK FOR TORNADOES...IN ADDITION TO LOCALLY DMGG WIND.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 24040.





...CORFIDI

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