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659 

WWUS20 KWNS 110332

SEL2

SPC WW 110332

ARZ000-LAZ000-OKZ000-TXZ000-111100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 12

NWS STORM PREDICTION CENTER NORMAN OK

930 PM CST TUE FEB 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       A LARGE PART OF WESTERN AND NORTHERN ARKANSAS

       PARTS OF NORTHWESTERN LOUISIANA

       PARTS OF EASTERN OKLAHOMA

       A LARGE PART OF EASTERN TEXAS



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 930 PM

UNTIL 500 AM CST.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 90 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF HARRISON

ARKANSAS TO COLLEGE STATION TEXAS.  FOR A COMPLETE DEPICTION OF

THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS

WOU2).



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 9...TORNADO WATCH NUMBER 10. WATCH NUMBER 9 10 WILL

NOT BE IN EFFECT AFTER 930 PM CST. CONTINUE...WW 11...



DISCUSSION...INTENSE S/WV TROUGH AND ASSOCIATED VERY STRONG MID/UPR

WIND MAX WILL MOVE RAPIDLY EWD ACROSS SRN PLAINS TONIGHT. LINE OF

SEVERE THUNDERSTORMS WITH EMBEDDED TORNADIC SUPERCELLS HAS DEVELOPED

ERN OK INTO CENTRAL TX.  IN ADDITION TO WIDESPREAD DAMAGING WINDS

ASSOCIATED WITH THE LINE...TORNADOS ARE ALSO LIKELY.  IN ADDITION

POTENTIAL FOR MORE DISCRETE SUPERCELLS DEVELOPING AHEAD OF THE

SQUALL LINE WHICH WOULD RESULT IN AN INCREASE POTENTIAL FOR STRONG

TORNADOES.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 80 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24045.





...HALES

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