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000 

WWUS20 KWNS 251657

SEL4

SPC WW 251657

ALZ000-TNZ000-260000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 864

NWS STORM PREDICTION CENTER NORMAN OK

1200 PM CDT MON AUG 25 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF NORTHERN ALABAMA

       SMALL PART OF SOUTHERN MIDDLE TENNESSEE



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM NOON UNTIL 700

PM CDT.



TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS

LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 70 MILES EAST OF HUNTSVILLE

ALABAMA TO 20 MILES SOUTH SOUTHWEST OF MUSCLE SHOALS ALABAMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 863...



DISCUSSION...BANDS OF THUNDERSTORMS CONTINUE TO ROTATE NWD E OF

REMNANTS OF FAY OVER CENTRAL MS.  WITH 30-40KT OF LOW LEVEL SHEAR

AND A VERY MOIST AIR MASS THERE WILL BE A CONTINUED THREAT OF SMALL

SUPERCELLS EMBEDDED IN THE BANDS ALONG WITH ISOLATED TORNADOES.

THREAT EXPECTED TO GRADUALLY SHIFT  NWD THRU THE WATCH AREA THIS

AFTERNOON.



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

TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI

WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION VECTOR 18030.





...HALES

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