

922 

WWUS20 KWNS 132255

SEL3

SPC WW 132255

FLZ000-GAZ000-CWZ000-140600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 153

NWS STORM PREDICTION CENTER NORMAN OK

655 PM EDT MON APR 13 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTH FLORIDA

       EXTREME SOUTHERN GEORGIA

       COASTAL WATERS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 655 PM UNTIL

200 AM EDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 60 MILES SOUTHWEST OF

TALLAHASSEE FLORIDA TO 25 MILES NORTH NORTHEAST OF ST AUGUSTINE

FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 150. WATCH NUMBER 150 WILL NOT BE IN EFFECT AFTER

655 PM EDT. CONTINUE...WW 151...WW 152...



DISCUSSION...THUNDERSTORMS WILL CONTINUE TO TRAIN ALONG A

SLOW-MOVING OUTFLOW BOUNDARY ACROSS N FL THROUGH TONIGHT.  THOUGH

LOW-LEVEL SHEAR MAY TEMPORARILY WEAKEN THIS EVENING...AN ADDITIONAL

INCREASE IN LOW-MID LEVEL FLOW COULD ACCOMPANY THE LARGE MCS AND

ASSOCIATED SUBTROPICAL SPEED MAX OVER THE NE GULF.  DAMAGING

WINDS...LARGE HAIL...AND LOCALLY HEAVY RAINFALL WILL BE THE MAIN

THREATS. A TORNADO OR TWO CANNOT BE RULED OUT WITH ROTATING STORMS

RIDING ALONG THE BOUNDARY...AND WHERE INLAND DISCRETE STORMS

INTERACT WITH THE REMNANT E COAST SEA BREEZE THIS EVENING ACROSS NE

FL.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 25035.





...THOMPSON

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