WATCHES: Tornado Watch Number 730

WWUS20 KWNS 230411
SEL0
SPC WW 230411
ALZ000-230900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 730
NWS STORM PREDICTION CENTER NORMAN OK
1110 PM CDT MON OCT 22 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

CENTRAL ALABAMA

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1110 PM
UNTIL 400 AM CDT.

TORNADOES...HAIL TO 0.5 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 35 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES EAST NORTHEAST OF
CENTREVILLE ALABAMA TO 45 MILES SOUTH SOUTHWEST OF SELMA ALABAMA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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...CLUSTER OF SUPERCELL THUNDERSTORMS CONTINUES TO POSE
OCCASIONAL TORNADO RISK...IN ENVIRONMENT CHARACTERIZED BY MOIST LOW
LEVEL PROFILE AND VERY STRONG VERTICAL SHEAR. MOB/BMX VAD PROFILES
INDICATE 3KM SRH VALUES OF 300-500 M2/S2 SUGGESTING THAT THREAT OF
ISOLATED TORNADOES MAY PERSIST FOR A FEW MORE HOURS OVER A SMALL
PART OF CENTRAL AL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 21030.

..HART

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