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000 

WWUS20 KWNS 170637

SEL6

SPC WW 170637

OKZ000-TXZ000-171400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 706

NWS STORM PREDICTION CENTER NORMAN OK

135 AM CDT WED OCT 17 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN OKLAHOMA

       THE TEXAS PANHANDLE AND NORTHWEST TEXAS



EFFECTIVE THIS WEDNESDAY MORNING FROM 135 AM UNTIL 900 AM CDT.



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 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST NORTHWEST OF

PLAINVIEW TEXAS TO 50 MILES SOUTH OF ALVA OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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 705...



DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO PERSIST AND POSSIBLY

INCREASE IN NUMBER INVOF DIFFUSE WARM FRONT EXTENDING ENE FROM SWRN

PARTS OF THE TX PANHANDLE INTO NW OK.  SLY LLJ SHOULD CONTINUE TO

STRENGTHEN AND MOISTEN WITH CONTINUED NE MOTION OF LEAD

IMPULSE...NOW OVER ERN NM...ASSOCIATED WITH APPROACHING LARGER SCALE

TROUGH OVER THE SRN RCKYS/GRT BASIN.  SETUP MAY SUPPORT NEAR

SFC-BASED STORMS THAT COULD POSE A THREAT FOR ISOLATED TORNADOES IN

ADDITION TO LARGE HAIL GIVEN LOW LCLS AND CONSIDERABLE DIRECTIONAL

COMPONENT TO LOW LVL SHEAR.



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

450. MEAN STORM MOTION VECTOR 24035.





...CORFIDI

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