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376 

WWUS20 KWNS 101854

SEL4

SPC WW 101854

KSZ000-MOZ000-110000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 694

NWS STORM PREDICTION CENTER NORMAN OK

150 PM CDT MON AUG 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME EASTERN KANSAS

       WEST CENTRAL AND SOUTHWEST MISSOURI



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 150 PM UNTIL 700

PM 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES SOUTHWEST

OF OLATHE KANSAS TO 45 MILES SOUTHEAST OF KNOB NOSTER 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 693...



DISCUSSION...SEVERE BOW ECHO SYSTEM MOVING EWD ACROSS ERN KS IS

EXPECTED TO CONTINUE INTO WEST CENTRAL MO...ALTHOUGH SOME ADJUSTMENT

IN THE CHARACTER OF THE CONVECTIVE MESOSYSTEM MAY OCCUR AS IT

INTERACTS WITH STORMS IMMEDIATELY DOWNSTREAM FROM IT.  THE

ENVIRONMENT GRADUALLY BECOMES LESS UNSTABLE INTO PARTS OF WESTERN MO

OWING TO PREVIOUS THUNDERSTORM ACTIVITY...HOWEVER STRONG FORWARD

MOMENTUM OF THE BOW ECHO SYSTEM COUPLED WITH DEVELOPMENT OF NEW

STRONG UPDRAFTS INDICATES THERE WILL CONTINUE TO BE POTENTIAL FOR

SEVERE WEATHER OVER THE NEXT SEVERAL HOURS.



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 550. MEAN STORM

MOTION VECTOR 28035.





...WEISS

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