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606 

WWUS20 KWNS 250844

SEL4

SPC WW 250844

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 424

NWS STORM PREDICTION CENTER NORMAN OK

440 AM EDT MON JUN 25 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL FLORIDA

       COASTAL WATERS



EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 440 AM UNTIL 200

PM EDT.



TORNADOES...HAIL TO 0.5 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF CROSS CITY

FLORIDA TO 30 MILES SOUTH OF AVON PARK FLORIDA.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU4).



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 423. WATCH NUMBER 423 WILL NOT BE IN EFFECT AFTER

440 AM EDT.



DISCUSSION...WHILE OVERALL TORNADO POTENTIAL HAS MARGINALLY SUBSIDED

ACROSS FL EARLY TODAY WITH THE LACK OF MORE WIDESPREAD

CONVECTION...STRONG DEEP-LAYER WIND FIELDS AND INTENSE LOW LEVEL

SHEAR WITHIN THE LARGER CIRCULATION OF T.S. DEBBY WILL CONTINUE TO

SUPPORT UPDRAFT ROTATION AND THE POTENTIAL FOR MINI-SUPERCELL

FORMATION. A PERSISTENT TROPICAL RAIN BAND FROM TAMPA BAY AREA NEWD

ACROSS THE PENINSULA IS ONE AREA WHERE THESE BRIEF SPIN UPS MAY

OCCUR OVER THE NEXT COUPLE OF HOURS. LACK OF CONVECTION THROUGH

EARLY IN THE DAYLIGHT HOURS COULD ACTUALLY RESULT IN AN INCREASING

TORNADO THREAT AS VERY MOIST AIRMASS DESTABILIZES FURTHER AND

RESULTS IN MORE ROBUST CONVECTIVE DEVELOPMENT AMIDST PERSISTENTLY

STRONG LOW LEVEL SHEAR ASSOCIATED WITH THE SLOW-MOVING TROPICAL

STORM.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 21035.





...CARBIN

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