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WWUS20 KWNS 051904

SEL5

SPC WW 051904

FLZ000-CWZ000-060100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 15

NWS STORM PREDICTION CENTER NORMAN OK

205 PM EST FRI FEB 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       MUCH OF CENTRAL FLORIDA AND PARTS OF SOUTH FLORIDA

       COASTAL WATERS



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 205 PM UNTIL 800

PM EST.



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 APPROXIMATELY ALONG AND 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF ORLANDO

FLORIDA TO 35 MILES SOUTH SOUTHWEST OF NAPLES FLORIDA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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.



DISCUSSION...A BROKEN BAND OF THUNDERSTORMS IS APPROACHING THE W

COAST OF FL IN ADVANCE OF A COLD FRONT AND EJECTING MID LEVEL

TROUGH.  LOW-LEVEL WARMING/MOISTENING ACROSS S/CENTRAL FL HAS

RESULTED IN SUFFICIENT INSTABILITY TO MAINTAIN THE CONVECTION ACROSS

THE PENINSULA THROUGH THE AFTERNOON/EVENING.  GIVEN THE OBSERVED

SEMI-DISCRETE STRUCTURES WITHIN THE BAND...AND ALREADY STRONG

VERTICAL SHEAR...THERE WILL BE SOME POTENTIAL FOR DAMAGING WINDS AND

AN ISOLATED TORNADO OR TWO.



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

450. MEAN STORM MOTION VECTOR 26030.





...THOMPSON

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