

264 

WWUS20 KWNS 241229

SEL9

SPC WW 241229

ALZ000-FLZ000-MSZ000-CWZ000-241900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 9

NWS STORM PREDICTION CENTER NORMAN OK

630 AM CST SUN JAN 24 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN ALABAMA

       WESTERN FLORIDA PANHANDLE

       SOUTHEAST MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 630 AM UNTIL 100

PM CST.



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 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES SOUTHEAST OF MOBILE

ALABAMA TO 20 MILES NORTH NORTHWEST OF SELMA ALABAMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



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...LOW-LEVEL MOISTURE CONTINUES TO INCREASE /MID 60S

DEWPOINTS/ AS A WARM FRONT LIFTS NWD ACROSS SRN AL AND THE FL

PANHANDLE.  THIS MOISTENING WILL SUPPORT MLCAPE VALUES TO NEAR 500

J/KG WITH CONVECTION ROOTED AT THE SURFACE...IN AN ENVIRONMENT OF

VERY STRONG LOW-LEVEL AND DEEP-LAYER VERTICAL SHEAR.  GIVEN THE

GRADUAL INCREASE IN THUNDERSTORMS OBSERVED ACROSS SE MS/SW AL...IT

APPEARS THAT THE THREAT FOR DAMAGING WINDS AND A COUPLE OF TORNADOES

WILL LIKEWISE INCREASE THROUGH THE MORNING.



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 400.

MEAN STORM MOTION VECTOR 23045.





...THOMPSON

