WATCHES: Tornado Watch Number 743

WWUS20 KWNS 201757
SEL3
SPC WW 201757
ALZ000-FLZ000-202200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 743
NWS STORM PREDICTION CENTER NORMAN OK
1150 AM CST THU DEC 20 2007

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

SOUTH CENTRAL ALABAMA
WESTERN FLORIDA PANHANDLE

EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 1150 AM UNTIL
400 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 45 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST SOUTHWEST OF
EVERGREEN ALABAMA TO 25 MILES NORTHEAST OF CRESTVIEW FLORIDA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).

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 741...WW 742...

DISCUSSION...MESOLOW AND ASSOCIATED BOW ECHO IN WRN AL ARE MOVING
EWD AT 50 KT AND SHOULD CONTINUE TO DO SO THROUGH THE AFTERNOON
HOURS. DESPITE VERY WEAK INSTABILITY...MUCAPES BETWEEN 100-300
J/KG...THE FAST MOTION OF THE SYSTEM COMBINED WITH STRONG DOWNWARD
MOMENTUM SHOULD RESULT IN CONTINUED WIND DAMAGE. ISOLATED TORNADOES
ARE ALSO POSSIBLE NEAR THE MESOLOW CIRCULATION.

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 27050.

..IMY

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@PO.UIUC.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.