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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 810

NWS STORM PREDICTION CENTER NORMAN OK

350 AM EST FRI DEC 25 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND WESTERN FLORIDA

       SOUTHERN GEORGIA

       COASTAL WATERS



EFFECTIVE THIS FRIDAY MORNING FROM 350 AM UNTIL 1100 AM EST.



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 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHWEST OF

WAYCROSS GEORGIA TO 65 MILES SOUTH SOUTHWEST OF CROSS CITY

FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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.



DISCUSSION...NNE/SSW-ORIENTED BAND OF PRE-FRONTAL TSTMS OVER SW

GA...THE ERN FL PANHANDLE...AND THE NERN GULF HAS INCREASED IN THE

PAST HOUR.  THE INCREASE MAY REFLECT A COMBINATION OF FACTORS

INCLUDING /1/ GLANCING INFLUENCE OF STRONG UPR IMPULSE NOW ENTERING

AL.../2/ GREATER LOW LVL MOISTURE RELATIVE TO POINTS WEST...AND /3/

HEATING FROM WARM LOOP CURRENT WATERS.  AT ANY RATE...ASSUMING THE

UPSWING PERSISTS...COMBINATION OF SUSTAINED STORMS IN ENVIRONMENT OF

STRONG 0-6 KM SHEAR WITH A CONSIDERABLE LOW-LVL DIRECTIONAL

COMPONENT SUGGESTS POTENTIAL FOR TORNADOES/LOCALLY DMGG WIND.



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

450. MEAN STORM MOTION VECTOR 21045.





...CORFIDI

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