

625 

WWUS20 KWNS 102140

SEL0

SPC WW 102140

ARZ000-OKZ000-TXZ000-110600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 10

NWS STORM PREDICTION CENTER NORMAN OK

340 PM CST TUE FEB 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR SOUTHWEST ARKANSAS

       MCCURTAIN COUNTY OKLAHOMA

       CENTRAL INTO NORTHEAST TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON FROM 340 PM UNTIL MIDNIGHT CST.



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

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST OF

STEPHENVILLE TEXAS TO 20 MILES SOUTH OF TEXARKANA ARKANSAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...CONTINUE...WW 8...WW 9...



DISCUSSION...SEVERE THUNDERSTORM THREAT WILL CONTINUE TO INCREASE

ACROSS WW THROUGH THE EVENING AHEAD OF INTENSE UPPER SYSTEM NOW

EJECTING ACROSS THE SRN HIGH PLAINS.  ASSOCIATED LLJ WILL INTENSIFY

AND INCREASE SHEAR OVER THE NEXT FEW HOURS.  ISOLATED

SUPERCELLS...AND POSSIBLE TORNADOES...MAY EVOLVE FROM PERSISTENT

TSTMS OVER NERN TX THIS EVENING WELL AHEAD OF MAIN UPPER SYSTEM.

MORE WIDESPREAD/ LIKELY SEVERE THUNDERSTORM DEVELOPMENT...INCLUDING

TORNADIC SUPERCELLS AND FAST MOVING BOW ECHOES...IS EXPECTED DURING

THE MID TO LATE EVENING SPREADING ENEWD ACROSS WW THROUGH TONIGHT.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 24040.





...EVANS

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