WATCHES: Severe Thunderstorm Watch Number 354

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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