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580 

WWUS20 KWNS 112104

SEL4

SPC WW 112104

KSZ000-MOZ000-120300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 284

NWS STORM PREDICTION CENTER NORMAN OK

400 PM CDT WED MAY 11 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN KANSAS

       WESTERN MISSOURI



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

1000 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH

NORTHWEST OF CHILLICOTHE MISSOURI TO 50 MILES SOUTH OF CHANUTE

KANSAS.  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...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 279. WATCH NUMBER 279 WILL NOT

BE IN EFFECT AFTER 400 PM CDT. CONTINUE...WW 280...WW 281...WW

282...WW 283...



DISCUSSION...STORMS ARE EXPECTED TO INCREASE ACROSS ERN KS AND WRN

MO THROUGH THE EVENING AS LIFT ASSOCIATED WITH EJECTING SHORT WAVE

TROUGH SPREADS ACROSS WARM AND MODERATELY UNSTABLE AIRMASS. DEEP

LAYER SHEAR SHOULD STRENGTHEN COINCIDENT WITH THE SHORT WAVE PASSAGE

AND SUPPORT INCREASED STORM ORGANIZATION WITH TIME. ACROSS THE SRN

AREAS OF THE WATCH...EXPECT MATURE FORWARD PROPAGATING MCS MOVING

INTO NERN OK TO DEVELOP NEWD WITHIN INSTABILITY AXIS SUSTAINED BY

LARGE SCALE SUPPORT. THIS SHOULD BRING AND INCREASING CHANCE OF WIND

DAMAGE TO PARTS OF SERN KS AND SWRN MO LATER THIS EVENING.



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 23035.





...CARBIN

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