

000 

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

