

754 

WWUS20 KWNS 232005

SEL5

SPC WW 232005

ARZ000-LAZ000-OKZ000-TXZ000-240300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 805

NWS STORM PREDICTION CENTER NORMAN OK

200 PM CST WED DEC 23 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR SOUTHWEST ARKANSAS

       WESTERN LOUISIANA

       SOUTHEAST OKLAHOMA

       EASTERN AND SOUTHEAST TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 200 PM UNTIL

900 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 125 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST OF

TYLER TEXAS TO 55 MILES SOUTH SOUTHEAST OF SHREVEPORT LOUISIANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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...TSTMS NOW FORMING ALONG LOW LVL CONFLUENCE ZONE AND

NW/SE WARM FRONT OVER E TX/SE OK AND THE SABINE RVR

VLY...RESPECTIVELY... EXPECTED TO GRADUALLY INCREASE IN

COVERAGE/STRENGTH THROUGH LATE TONIGHT AS REGION CONTINUES TO

MOISTEN AND LARGE SCALE ASCENT STRENGTHENS WITH THE APPROACH OF NM

UPR TROUGH.  ABSENCE OF STRONG LINEAR FORCING AND GRADUALLY

INCREASING SHEAR /BOTH NEAR-SFC AND DEEP/ SUGGEST LIKELIHOOD FOR A

FEW SUPERCELLS WITH THE POTENTIAL FOR TORNADOES...IN ADDITION TO

LOCALLY DMGG WIND/ MARGINALLY SVR HAIL.



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 22040.





...CORFIDI

