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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 861

NWS STORM PREDICTION CENTER NORMAN OK

635 PM CDT FRI OCT 7 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EXTREME SOUTHEAST COLORADO

       WESTERN KANSAS

       EXTREME SOUTHWEST NEBRASKA

       THE CENTRAL AND WESTERN OKLAHOMA PANHANDLE

       THE CENTRAL AND WESTERN TEXAS PANHANDLE



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 635 PM

UNTIL 200 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 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 75 MILES NORTHEAST OF GOODLAND

KANSAS TO 40 MILES SOUTHWEST OF AMARILLO TEXAS.  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.



DISCUSSION...SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP

THROUGH THE EVENING ALONG A RETREATING DRYLINE FROM THE TX PANHANDLE

NWD INTO WRN KS.  THE ENVIRONMENT INITIALLY FAVORS SUPERCELLS WITH

LARGE HAIL/DAMAGING WINDS...BUT AN INCREASE IN LOW-LEVEL SHEAR AND

MOISTURE THIS EVENING WILL PROMOTE A RISK FOR A COUPLE OF TORNADOES.

THE CONVECTION WILL LIKELY REMAIN IN A RELATIVELY NARROW NNE-SSW

ORIENTED BAND THROUGH EARLY TONIGHT...WITH ADDITIONAL DEVELOPMENT

EXPECTED LATER TONIGHT AS A COLD FRONT OVERTAKES THE DRYLINE AND A

STRONG SHORTWAVE TROUGH EJECTS NNEWD OVER NM.



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

500. MEAN STORM MOTION VECTOR 21035.





...THOMPSON

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