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906 

WWUS20 KWNS 090621

SEL3

SPC WW 090621

ARZ000-MOZ000-OKZ000-091200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 943

NWS STORM PREDICTION CENTER NORMAN OK

1225 AM CST TUE DEC 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTHERN AND WESTERN ARKANSAS

       PARTS OF SOUTHERN MISSOURI

       PARTS OF EASTERN OKLAHOMA



EFFECTIVE THIS TUESDAY MORNING FROM 1225 AM UNTIL 600 AM CST.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHWEST

OF POTEAU OKLAHOMA TO 30 MILES EAST OF WEST PLAINS MISSOURI.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 941...WW 942...



DISCUSSION...SQUALL LINE HAS DEVELOPED ACROSS ERN OK IN RESPONSE TO

STRONG S/WV TROUGH MOVING ENEWD ACROSS SRN PLAINS.  WITH VERY STRONG

WIND FIELDS...THE POTENTIAL FOR WIND DAMAGE WILL BE ASSOCIATED WITH

THE SQUALL LINE EVEN THOUGH INSTABILITY IS MARGINAL.



AVIATION...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 450. MEAN STORM

MOTION VECTOR 24050.





...HALES

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