

579 

WWUS20 KWNS 130401

SEL7

SPC WW 130401

ALZ000-FLZ000-CWZ000-131000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 147

NWS STORM PREDICTION CENTER NORMAN OK

1105 PM CDT SUN APR 12 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ALABAMA

       EXTREME WESTERN FLORIDA PANHANDLE

       COASTAL WATERS



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1105 PM UNTIL

500 AM CDT.



TORNADOES...HAIL TO 1 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 15 MILES NORTH NORTHWEST OF

MONTGOMERY ALABAMA TO 25 MILES WEST SOUTHWEST OF PENSACOLA

FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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...CONTINUE...WW 146...



DISCUSSION...A LINEAR MCS WITH EMBEDDED BOW/SUPERCELL STRUCTURES

WILL CONTINUE TO MOVE EWD FROM SE MS INTO SW/SRN AL ALONG THE WARM

FRONT/NRN EDGE OF THE SURFACE MOIST SECTOR.  THOUGH THE LINEAR

CONFIGURATION OF THE CONVECTION SUGGESTS THAT DAMAGING WINDS AND

HEAVY RAINFALL WILL BE THE MAIN THREATS...LOW-LEVEL SHEAR REMAINS

QUITE STRONG AND AN ISOLATED TORNADO OR TWO WILL STILL BE POSSIBLE

THROUGH THE EARLY MORNING HOURS.



AVIATION...TORNADOES AND 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 27030.





...THOMPSON

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