

475 

WWUS20 KWNS 220307

SEL6

SPC WW 220307

FLZ000-CWZ000-221100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 186

NWS STORM PREDICTION CENTER NORMAN OK

1110 PM EDT SAT APR 21 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN FLORIDA PENINSULA

       COASTAL WATERS



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1110 PM

UNTIL 700 AM EDT.



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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 70 MILES NORTHEAST OF SAINT

PETERSBURG FLORIDA TO 60 MILES SOUTH SOUTHWEST OF MIAMI FLORIDA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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...SCATTERED THUNDERSTORMS ARE INCREASING OFF THE WEST

COAST OF CENTRAL/SOUTH FL.  THESE STORMS ARE ASSOCIATED WITH A

STRONG UPPER TROUGH APPROACHING THE REGION.  COOLING TEMPERATURES

ALOFT AND STRENGTHENING WIND FIELDS WILL PROMOTE A RISK OF STRONG TO

SEVERE THUNDERSTORMS OVERNIGHT ACROSS THE WATCH AREA.  DAMAGING

WINDS ARE THE MAIN THREAT...BUT A FEW SUPERCELLS CAPABLE OF

TORNADOES ARE POSSIBLE.



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 26025.





...HART

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