Severe Local Storm Watch and Watch Cancellation Msg
Issued by NWS

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000
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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