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212 

WWUS20 KWNS 260332

SEL7

SPC WW 260332

FLZ000-CWZ000-261100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 107

NWS STORM PREDICTION CENTER NORMAN OK

1130 PM EDT SUN APR 25 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN FLORIDA

       COASTAL WATERS



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1130 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 EITHER SIDE OF A LINE FROM 25 MILES SOUTH OF SARASOTA

FLORIDA TO 35 MILES NORTH NORTHEAST OF MELBOURNE FLORIDA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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 SEVERE

THUNDERSTORM WATCH NUMBER 106. WATCH NUMBER 106 WILL NOT BE IN

EFFECT AFTER 1130 PM EDT.



DISCUSSION...LOW LVL AIR MASS IS RECOVERING ACROSS CNTRL FL IN WAKE

OF EARLIER STORMS.  ASSOCIATED SELY NEAR-SFC FLOW...COUPLED WITH

SLOWLY INCREASING SW TO WSWLY LOW TO MID LVL FLOW...IS RESULTING IN

HODOGRAPHS FAVORABLE FOR LOW LVL STORM ROTATION ACROSS REGION /REF

TPA VWP/.  SATELLITE LOOP SUGGESTS THAT AREA WILL RECEIVE GLANCING

INFLUENCE OF PASSING SHORTWAVE DISTURBANCE NOW CROSSING THE NRN

GULF...WITH ASSOCIATED ASCENT LIKELY RESPONSIBLE /IN PART/ FOR

ON-GOING STORMS OFF THE W CNTRL FL CST.  OVERALL SETUP MAY THEREFORE

SUPPORT ISOLD TORNADOES...BOTH WITH EXISTING STORMS OVER LAND...AND

WITH ACTIVITY LIKELY TO MOVE ASHORE LATER TONIGHT/EARLY MON.



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 550.

MEAN STORM MOTION VECTOR 24035.





...CORFIDI

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