

560 

WWUS20 KWNS 270605

SEL6

SPC WW 270605

ARZ000-MOZ000-OKZ000-271300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 956

NWS STORM PREDICTION CENTER NORMAN OK

1205 AM CST SAT DEC 27 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHWEST ARKANSAS

       CENTRAL AND SOUTHWEST MISSOURI

       EAST CENTRAL OKLAHOMA



EFFECTIVE THIS SATURDAY MORNING FROM 1205 AM UNTIL 700 AM CST.



TORNADOES...HAIL TO 1 INCH 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 70 MILES NORTHEAST OF COLUMBIA

MISSOURI TO 50 MILES SOUTH SOUTHWEST OF POTEAU 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 955...



DISCUSSION...ISOLATED THUNDERSTORMS MAY FORM DURING THE NEXT FEW

HOURS WITHIN THE BROAD WARM SECTOR FROM ERN OK NNEWD INTO NW AR AND

MO.  THE 05Z SGF SOUNDING APPEARS TO BE REPRESENTATIVE OF THE OPEN

WARM SECTOR WITH VERY STRONG LOW-LEVEL SHEAR AND MUCAPE OF 750-1000

J/KG...AND SUBSTANTIAL MOISTENING HAS OCCURRED SINCE 00Z IN THE

850-700 MB LAYER.  PROFILES WILL REMAIN FAVORABLE OVERNIGHT FOR

SUPERCELLS AND SMALL BOWING SEGMENTS...WITH AN ATTENDANT THREAT FOR

A COUPLE OF TORNADOES...DAMAGING WINDS...AND ISOLATED LARGE HAIL.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 23045.





...THOMPSON

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