WATCHES: Tornado Watch Number 734

WWUS20 KWNS 211847
SEL4
SPC WW 211847
ARZ000-ILZ000-MOZ000-220200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 734
NWS STORM PREDICTION CENTER NORMAN OK
1250 PM CST WED NOV 21 2007

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

MUCH OF SOUTHERN AND EASTERN ARKANSAS
PARTS OF SOUTHERN ILLINOIS
PARTS OF SOUTHEASTERN MISSOURI

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL
800 PM CST.

TORNADOES...HAIL TO 2 INCHES 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 NORTH OF CAPE
GIRARDEAU MISSOURI TO 70 MILES SOUTH OF HOT SPRINGS ARKANSAS.
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.

DISCUSSION...AIR MASS AHEAD OF STRONG COLD FRONT HAS CONTINUED TO
DESTABILIZE WITH STORMS NOW DEVELOPING. WITH SHEAR PROFILES
FAVORABLE FOR SUPERCELLS AND APPROACH OF VIGOROUS TROUGH AND WIND
MAX FROM CENTRAL PLAINS...POTENTIAL FOR SEVERE THUNDERSTORMS
INCLUDING SUPERCELL TORNADOES WILL INCREASE ALONG AND E OF FRONT
REMAINDER OF AFTERNOON.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24030.

..HALES

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