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721 

WWUS20 KWNS 181750

SEL3

SPC WW 181750

FLZ000-CWZ000-190000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 83

NWS STORM PREDICTION CENTER NORMAN OK

150 PM EDT FRI APR 18 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL FLORIDA

  COASTAL WATERS



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 150 PM UNTIL

  800 PM EDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

STATUTE MILES EAST AND WEST OF A LINE FROM 80 MILES NORTH

NORTHEAST OF SAINT PETERSBURG FLORIDA TO 50 MILES SOUTH SOUTHEAST

OF SARASOTA FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



DISCUSSION...SQUALL LINE WILL CONTINUE THROUGH THE CENTRAL FLORIDA

PENINSULA THIS AFTERNOON WITHIN AN ENVIRONMENT CHARACTERIZED BY

MODEST VERTICAL SHEAR AND INSTABILITY. EMBEDDED ORGANIZED STRUCTURES

INCLUDING BOWING SEGMENTS AND MESO-VORTICES WILL POSE A THREAT FOR

ISOLATED DAMAGING WIND AND PERHAPS A TORNADO OR TWO.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 24035.





...DIAL

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