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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 364

NWS STORM PREDICTION CENTER NORMAN OK

250 AM EDT SAT JUN 9 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH FLORIDA

       COASTAL WATERS



EFFECTIVE THIS SATURDAY MORNING FROM 250 AM UNTIL 800 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 EAST AND WEST OF A LINE FROM 45 MILES WEST

NORTHWEST OF WEST PALM BEACH FLORIDA TO 60 MILES SOUTHWEST OF

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 363...



DISCUSSION...LONG-LIVED FORWARD-PROPAGATING TSTM CLUSTERS HAVE MOVED

EWD INTO S FL FROM THE ERN GULF OF MEXICO.  AREA OBSERVATIONS SHOW

VERY RICH MOISTURE /PW AOA 2 INCHES/...ANOMALOUS 850-500 MB WLY

FLOW...AND SUSTAINED ELY LOW LVL WINDS.  ADDITIONAL

FORWARD-PROPAGATING STORMS ARE APPROACHING THE SW FL CST ATTM AND

MAY MERGE WITH SRN END OF EXISTING SQLN NOW OVER THE PENINSULA.

OVERALL SETUP MAY CONTINUE TO YIELD SMALL BOWING STRUCTURES/EMBEDDED

CIRCULATIONS THAT COULD PRODUCE LOCALLY DMGG WIND AND PERHAPS A

BRIEF TORNADO THROUGH LATER THIS MORNING.



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 26030.





...CORFIDI

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