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   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 750
   NWS STORM PREDICTION CENTER NORMAN OK
   145 PM EDT FRI AUG 13 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          THE FLORIDA PENINSULA
          COASTAL WATERS
   
   EFFECTIVE THIS FRIDAY AFTERNOON AND SATURDAY MORNING FROM 145 PM
   UNTIL 200 AM EDT.
   
   TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST
   OF A LINE FROM 50 MILES NORTHWEST OF DAYTONA BEACH FLORIDA TO 60
   MILES SOUTHWEST OF MIAMI FLORIDA.
   
   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...THIS TORNADO WATCH REPLACES TORNADO
   WATCH NUMBER 749. WATCH NUMBER 749 WILL NOT BE IN EFFECT AFTER 145
   PM EDT. 
   
   DISCUSSION...MAJOR HURRICANE CHARLEY IS FORECAST TO MAKE LANDFALL
   LATER THIS AFTERNOON/EVENING ALONG THE WRN FL COAST INVOF SRQ-FMY. 
   MULTIPLE CONVECTIVE BANDS WILL CONTINUE TO SPREAD NWD/NEWD IN
   ADVANCE OF THE STORM CORE.  SURFACE HEATING ACROSS CENTRAL/S FL HAS
   ALLOWED SUBSTANTIAL DESTABILIZATION BETWEEN THE BANDS...WHERE SBCAPE
   VALUES RANGE FROM 1500-3000 J/KG.  INCREASING VERTICAL SHEAR WITH
   TIME ACROSS CENTRAL FL...IN COMBINATION WITH THE MODERATE TO STRONG
   INSTABILITY...WILL CONTRIBUTE TO AN INCREASING THREAT FOR MULTIPLE
   SUPERCELLS/TORNADOES THIS AFTERNOON.  THE THREAT FOR TORNADOES WILL
   ALSO SPREAD NWD TOWARD N FL LATER THIS AFTERNOON INTO TONIGHT...
   WHILE THE THREAT GRADUALLY DIMINISHES ACROSS S FL BY THIS EVENING.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
   MEAN STORM MOTION VECTOR 18035.
   
   
   ...THOMPSON