12:28

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 764
NWS STORM PREDICTION CENTER NORMAN OK 1225 PM CDT FRI OCT 9 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR
PORTIONS OF NORTHWEST ALABAMA
SOUTH CENTRAL INTO SOUTHEAST KENTUCKY
MIDDLE TENNESSEE
EFFECTIVE THIS FRIDAY AFTERNOON FROM 1225 PM UNTIL 500 PM 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHWEST OF MUSCLE
SHOALS ALABAMA TO 50 MILES WEST NORTHWEST OF LONDON KENTUCKY.
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 762...WW 763...

DISCUSSION...POTENTIAL FOR SUPERCELLS AND SMALL BOW ECHOES WILL
INCREASE ACROSS WW THIS AFTERNOON INVOF EJECTING MID LEVEL IMPULSE
AND ASSOCIATED SWLY LLJ. WIND DAMAGE WILL LIKELY BE PRIMARY THREAT
WITH THIS ACTIVITY...ALTHOUGH VERY STRONG SHEAR SHOULD SUPPORT
ISOLATED TORNADO POTENTIAL AS WELL.
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 24040. ...EVANS