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WWUS20 KWNS 051107

SEL5

SPC WW 051107

FLZ000-CWZ000-051800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 105

NWS STORM PREDICTION CENTER NORMAN OK

705 AM EDT TUE APR 5 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL FLORIDA PENINSULA

       COASTAL WATERS



EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 705 AM UNTIL

200 PM 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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF

OCALA FLORIDA TO 40 MILES SOUTH SOUTHWEST OF AVON PARK FLORIDA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 101...WW 102...WW

103...WW 104...



DISCUSSION...TRAILING EXTENSION OF LONG-LIVED QLCS IS EXPECTED TO

CONTINUE EWD/SEWD ACROSS WATCH AREA TODAY WITH SOME BACKBUILDING

DEVELOPMENT POSSIBLE ALONG THE WRN EDGE OF SYSTEM.  WHILE DEEP-LAYER

VERTICAL SHEAR WILL GRADUALLY STRENGTHEN THROUGH THE MORNING...THE

LOW-LEVEL WIND FIELD IS EXPECTED TO VEER AND SLOWLY WEAKEN.  GIVEN

THAT THE DOMINANT CONVECTIVE MODE IS EXPECTED TO REMAIN LINEAR OR

QUASI-LINEAR...THE PRIMARY HAZARD WILL BE DAMAGING WIND GUSTS.



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 500. MEAN STORM MOTION

VECTOR 27035.





...MEAD

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