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WWUS20 KWNS 081651

SEL5

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ARZ000-LAZ000-OKZ000-TXZ000-090000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 875

NWS STORM PREDICTION CENTER NORMAN OK

1050 AM CST TUE NOV 8 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL ARKANSAS

       NORTHWEST LOUISIANA

       SOUTHEAST OKLAHOMA

       NORTH CENTRAL AND NORTHEAST TEXAS



EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1050 AM UNTIL 600

PM CST.



TORNADOES...HAIL TO 1.5 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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHEAST OF

RUSSELLVILLE ARKANSAS TO 50 MILES WEST OF LUFKIN TEXAS.  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...AN ONGOING LINE OF STORMS WITH EMBEDDED BOWING SEGMENTS

WILL CONTINUE NEWD FROM ERN OK INTO NW AR WITH SOME RISK FOR

DAMAGING WINDS AND/OR A BRIEF TORNADO WITH EMBEDDED CIRCULATIONS.

HOWEVER...WEAK INSTABILITY SHOULD LIMIT THE NWD EXTENT OF THE

THREAT. FARTHER S IN THE WARM SECTOR...A MOIST ENVIRONMENT AND

RELATIVELY WEAK CAP WILL ALLOW SCATTERED STORM DEVELOPMENT ALONG AND

AHEAD OF THE SURFACE COLD FRONT.  VERTICAL SHEAR AND INSTABILITY

WILL BE SUFFICIENT FOR A FEW SUPERCELLS...WITH AN ACCOMPANYING RISK

FOR A COUPLE OF TORNADOES AND DAMAGING WINDS THROUGH THE AFTERNOON.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24035.





...THOMPSON

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