

343 

WWUS20 KWNS 091403

SEL4

SPC WW 091403

KSZ000-MOZ000-092000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 354

NWS STORM PREDICTION CENTER NORMAN OK

905 AM CDT TUE JUN 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST AND EAST CENTRAL KANSAS

       WEST CENTRAL MISSOURI



EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 905 AM UNTIL

300 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTHWEST

OF CONCORDIA KANSAS TO 60 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.



DISCUSSION...A LARGE REGION OF ELEVATED THUNDERSTORMS HAS DEVELOPED

IN RESPONSE TO WAA IN A ZONE OF MODERATE INSTABILITY /MUCAPE OF

2000-2500 J/KG/.  THIS CONVECTION WILL LIKELY PERSIST AND SPREAD

EWD/ESEWD ACROSS KS TOWARD WRN MO THROUGH EARLY AFTERNOON WITH AN

ACCOMPANYING RISK OF LARGE HAIL.  IN THE 18-20Z TIME FRAME...THERE

WILL BE SOME POTENTIAL FOR CONVECTION TO BECOME SURFACE-BASED WITH

AN ATTENDANT INCREASE IN THE THREAT FOR DAMAGING WINDS ALONG THE SRN

FLANK OF THE LARGER CONVECTIVE SYSTEM.



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 27025.





...THOMPSON

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