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000 

WWUS20 KWNS 012215

SEL4

SPC WW 012215

ARZ000-KSZ000-MOZ000-OKZ000-020600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 324

NWS STORM PREDICTION CENTER NORMAN OK

515 PM CDT FRI JUN 1 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST ARKANSAS

       EXTREME SOUTHEAST KANSAS

       SOUTHWEST MISSOURI

       CENTRAL AND NORTHEAST OKLAHOMA



EFFECTIVE THIS FRIDAY AFTERNOON AND SATURDAY MORNING FROM 515 PM

UNTIL 100 AM CDT.



HAIL TO 2 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 5 MILES NORTH OF

FORT SILL OKLAHOMA TO 45 MILES NORTHEAST OF SPRINGFIELD MISSOURI.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 321...WW 322...WW 323...



DISCUSSION...SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE TO

INCREASE IN AREAL COVERAGE THROUGH THE EVENING ACROSS THE WATCH

AREA.  VERTICAL SHEAR IS ONLY MARGINAL FOR THUNDERSTORM

ORGANIZATION.  HOWEVER...MLCAPE VALUES OVER 2500 J/KG AND WEAK LARGE

SCALE FORCING ASSOCIATED WITH APPROACHING UPPER JET WILL LIKELY

MAINTAIN RISK OF LOCALLY SEVERE STORMS THROUGH MIDNIGHT.



AVIATION...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 25025.





...HART

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