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000 

WWUS20 KWNS 190241

SEL0

SPC WW 190241

FLZ000-CWZ000-191200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 840

NWS STORM PREDICTION CENTER NORMAN OK

1040 PM EDT MON AUG 18 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN FLORIDA PENINSULA

       COASTAL WATERS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1040 PM

UNTIL 800 AM EDT.



TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS

LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES WEST NORTHWEST OF

MELBOURNE FLORIDA TO 70 MILES SOUTH OF MIAMI FLORIDA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 837. WATCH NUMBER 837 WILL NOT BE IN EFFECT AFTER

1040 PM EDT. CONTINUE...WW 839...



DISCUSSION...T.S. FAY WILL TRACK NWD AND INLAND ACROSS CENTRAL FL

OVERNIGHT.  CONVECTIVE BANDS WILL CONTINUE TO ROTATE NWWD ACROSS THE

WATCH AREA THRU THE REMAINDER OF THE NIGHT.  SHEAR IS SUFFICIENT FOR

ISOLATED TORNADO THREAT CONTINUING PRIMARILY WITH EMBEDDED SMALL

SUPERCELLS IN THE BANDS.



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

TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI

WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 13035.





...HALES

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