

011 

WWUS20 KWNS 252259

SEL6

SPC WW 252259

FLZ000-CWZ000-260600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 106

NWS STORM PREDICTION CENTER NORMAN OK

655 PM EDT SUN APR 25 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL FLORIDA

       COASTAL WATERS



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 655 PM UNTIL

200 AM EDT.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EITHER SIDE OF A LINE FROM 20 MILES SOUTHWEST OF

SARASOTA FLORIDA TO 40 MILES NORTH OF MELBOURNE FLORIDA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 104...WW 105...



DISCUSSION...BAND OF TSTMS WITH EMBEDDED SUSTAINED STORMS/POSSIBLE

SUPERCELLS EXPECTED TO PERSIST OVER CNTRL FL THROUGH LATE TONIGHT.

STLT DATA SUGGEST THAT ASSOCIATED LOW LVL CONVERGENCE ZONE WILL

REMAIN IN AREA OF WAA/DEEP ASCENT ON SRN FRINGE OF DEEP OH VLY

TROUGH.  STRENGTH OF MEAN UNIDIRECTIONAL FLOW AND RICH MOISTURE OVER

REGION SUGGEST LIKELIHOOD FOR SMALL BOWS WITH LOCALLY DMGG WIND...IN

ADDITION TO BACK-BUILDING STRUCTURES/LEWPS WITH VERY HEAVY RAIN AND

PERHAPS AN ISOLD TORNADO.



AVIATION...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 25030.





...CORFIDI

