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WWUS20 KWNS 250223

SEL1

SPC WW 250223

ARZ000-MOZ000-OKZ000-251000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 751

NWS STORM PREDICTION CENTER NORMAN OK

825 PM CST WED NOV 24 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHWEST ARKANSAS

       SOUTHERN MISSOURI

       EAST CENTRAL AND NORTHEAST OKLAHOMA



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 825 PM

UNTIL 400 AM 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 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH NORTHWEST OF

MCALESTER OKLAHOMA TO 50 MILES SOUTHEAST OF VICHY MISSOURI.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 750. WATCH NUMBER 750 WILL NOT BE IN EFFECT AFTER

825 PM CST.



DISCUSSION...A BAND OF OCCASIONALLY SEVERE STORMS WILL PERSIST

OVERNIGHT ALONG A PRE-FRONTAL BOUNDARY FROM NE OK INTO SRN MO.  WEAK

SURFACE-BASED INSTABILITY AND STRONG VERTICAL SHEAR WILL REMAIN

FAVORABLE FOR EMBEDDED SUPERCELLS WITH AN ATTENDANT RISK OF DAMAGING

WINDS AND A COUPLE OF TORNADOES.  CONVECTION SHOULD GRADUALLY BECOME

MORE LINEAR LATER TONIGHT AS THE COLD FRONT OVERTAKES THE

PRE-FRONTAL BAND.



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 450.

MEAN STORM MOTION VECTOR 25040.





...THOMPSON

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