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000 

WWUS20 KWNS 101632

SEL3

SPC WW 101632

ARZ000-KSZ000-MOZ000-OKZ000-110000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 293

NWS STORM PREDICTION CENTER NORMAN OK

1130 AM CDT SAT MAY 10 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHWEST ARKANSAS

       SOUTHEAST KANSAS

       SOUTHWEST MISSOURI

       NORTHEAST OKLAHOMA



EFFECTIVE THIS SATURDAY MORNING AND EVENING FROM 1130 AM UNTIL

700 PM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 110 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTHWEST OF

BARTLESVILLE OKLAHOMA TO 50 MILES NORTHEAST OF HARRISON ARKANSAS.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 292...



DISCUSSION...NUMEROUS ELEVATED STORMS WILL OVERSPREAD SOME OF THE

WATCH AREA THROUGH EARLY AFTERNOON WITHIN INTENSIFYING LOW LEVEL

WARM ADVECTION REGIME AHEAD OF AMPLIFYING LARGE SCALE PATTERN. MOST

GUIDANCE SUPPORT RAPID NEAR-SURFACE-BASED DESTABILIZATION IN THE

WAKE OF THIS INITIAL ROUND OF ELEVATED CONVECTION AND ADDITIONAL

STORMS ARE ILKLEY TO FORM NEAR THE SURFACE LOW AND WARM FRONT BY

MID-LATE AFTERNOON. DEEP-LAYER SHEAR...ALREADY SUFFICIENT FOR

UPDRAFT ROTATION AND HAIL PRODUCTION...WILL STRENGTHEN FURTHER

COINCIDENT WITH THE INCREASE IN LARGE SCALE ASCENT.

FURTHERMORE...STRONG LOW LEVEL SRH NEAR THE LOW AND ALONG THE WARM

FRONT WILL BECOME INCREASINGLY FAVORABLE FOR LOW LEVEL AND

PERSISTENT STORM ROTATION AND POSSIBLE TORNADOES...ESPECIALLY LATER

THIS AFTERNOON.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 26030.





...CARBIN

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