

000 

WWUS20 KWNS 261113

SEL8

SPC WW 261113

ALZ000-FLZ000-MSZ000-CWZ000-261800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 78

NWS STORM PREDICTION CENTER NORMAN OK

515 AM CST TUE FEB 26 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN ALABAMA

       WESTERN FLORIDA PANHANDLE

       SOUTHEAST MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS TUESDAY MORNING FROM 515 AM UNTIL NOON CST.



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 NORTH AND SOUTH OF A LINE FROM 50 MILES WEST

NORTHWEST OF MOBILE ALABAMA TO 45 MILES NORTH NORTHEAST OF

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 76...WW 77...



DISCUSSION...A BAND OF STRONG/SEVERE THUNDERSTORMS WILL SPREAD ESEWD

FROM SE MS INTO SWRN/SRN AL THIS MORNING IN ADVANCE OF A COLD FRONT.

 LOW-LEVEL MOISTENING OVERNIGHT HAS RESULTED IN THE DEVELOPMENT OF

SURFACE-BASED INSTABILITY ACROSS SRN AL...WHERE LOCAL VWP/S SHOW 50

KT WSWLY FLOW WITHIN 1 KM OF THE GROUND.  PRESENT INDICATIONS ARE

THAT DAMAGING WINDS WILL BE THE PRIMARY SEVERE STORM THREAT WITH

STORMS IN THE BAND...ALONG WITH ISOLATED LARGE HAIL.



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 450. MEAN STORM MOTION

VECTOR 26045.





...THOMPSON

