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Severe Thunderstorm Watch 304
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WW0304 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Low Low
Severe Hail 2"+ Hail
Moderate Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 304
   NWS STORM PREDICTION CENTER NORMAN OK
   745 AM CDT FRI MAY 15 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHWEST IOWA
          NORTHEAST KANSAS
          NORTHERN AND WEST CENTRAL MISSOURI
          SOUTHEAST NEBRASKA
   
   EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 745 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 155
   STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES WEST
   NORTHWEST OF SHENANDOAH IOWA TO 15 MILES SOUTH SOUTHWEST OF
   OLATHE 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.
   
   DISCUSSION...SCTD STRONG ELEVATED TSTMS HAVE BEEN FORMING OVER N
   CNTRL KS IN THE PAST 2 HRS IN WAKE OF WEAKER EARLIER STORMS NOW OVER
   NRN MO.  THE KS STORMS APPEAR TO BE ASSOCIATED WITH LEADING EDGE OF
   QUALITY MOISTURE RETURN /PER SATELLITE-DERIVED PW DATA/...AND
   PERHAPS WEAK DPVA AHEAD OF MAIN NRN RCKYS UPR TROUGH.  COMBINATION
   OF INCREASING MOISTURE INFLOW AND...WITH TIME...UPSTREAM DIURNAL
   DESTABILIZATION...MAY SUPPORT STORM INTENSIFICATION AND ALLOW THE
   ACTIVITY TO BECOME MORE NEARLY SFC-BASED.  THUS...A THREAT WILL
   EXIST FOR SVR HAIL AND...WITH TIME...POSSIBLY DMGG WIND.
   
   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 24035.
   
   
   ...CORFIDI
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