SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 459
   NWS STORM PREDICTION CENTER NORMAN OK
   500 PM CDT SAT JUN 10 2006
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          WEST CENTRAL ILLINOIS
          EXTREME EASTERN KANSAS
          CENTRAL MISSOURI
   
   EFFECTIVE THIS SATURDAY AFTERNOON FROM 500 PM UNTIL MIDNIGHT 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 50
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES SOUTH
   SOUTHWEST OF OLATHE KANSAS TO 50 MILES EAST NORTHEAST OF SCOTT
   AFB ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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 457...WW 458...
   
   DISCUSSION...SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE TO
   DEVELOP THIS AFTERNOON AND EVENING ALONG SURFACE BOUNDARY WHICH
   EXTENDS FROM JUST SOUTH OF MKC INTO THE STL AREA.  DEVELOPMENT WILL
   BE ENHANCED BY WELL-DEFINED SHORTWAVE TROUGH CURRENTLY OVER KS. 
   MOIST AND MODERATELY UNSTABLE AIR MASS...COUPLED WITH 30-40 KNOTS OF
   DEEP LAYER EFFECTIVE SHEAR SUGGEST A POTENTIAL FOR SEVERE STORMS
   CAPABLE OF DAMAGING WINDS AND HAIL.
   
   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 27030.
   
   
   ...HART