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708 

WWUS20 KWNS 090101

SEL1

SPC WW 090101

ARZ000-ILZ000-KYZ000-MOZ000-TNZ000-090800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 761

NWS STORM PREDICTION CENTER NORMAN OK

800 PM CDT THU OCT 8 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       MUCH OF NORTHERN ARKANSAS

       SMALL PART OF SOUTHERN ILLINOIS

       PARTS OF WESTERN KENTUCKY

       PARTS OF SOUTHERN MISSOURI

       PARTS OF NORTHWESTERN TENNESSEE



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 800 PM

UNTIL 300 AM CDT.



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 55 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 60 MILES WEST NORTHWEST OF

RUSSELLVILLE ARKANSAS TO 35 MILES SOUTH SOUTHEAST OF OWENSBORO

KENTUCKY.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 758...WW 759...WW 760...



DISCUSSION...WARM SECTOR AIR MASS S OF E/W FRONTAL ZONE IS VERY

MOIST...UNSTABLE WITH STRONG SHEAR PROFILES IN SUPPORT OF SUPERCELL

DEVELOPMENT.  STORMS WILL CONTINUE TO DEVELOP VICINITY FRONTAL ZONE

NWRN AR/SRN MO AND SPREAD EWD THRU THE NIGHT. TORNADO SUPERCELLS

WILL BE LIKELY GIVEN THE VEERING SHEAR PROFILES COUPLED WITH MLCAPES

UPWARDS TO 2500 J/KG IN THE WARM SECTOR.



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

550. MEAN STORM MOTION VECTOR 24035.





...HALES

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