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Severe Thunderstorm Watch 308
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WW0308 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 308
   NWS STORM PREDICTION CENTER NORMAN OK
   630 PM CDT FRI MAY 15 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          EXTREME SOUTHWEST ILLINOIS
          EXTREME EASTERN KANSAS
          PARTS OF CENTRAL AND SOUTHERN MISSOURI
   
   EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 630 PM
   UNTIL 100 AM 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 55 MILES SOUTH
   SOUTHWEST OF OLATHE KANSAS TO 25 MILES NORTHEAST OF FARMINGTON
   MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
   
   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 305...WW 306...WW 307...
   
   DISCUSSION...AN E-W OUTFLOW BOUNDARY WILL CONTINUE TO SAG SWD ACROSS
   CENTRAL MO IN RESPONSE TO REINFORCEMENT OF THE COLD POOL WITH
   REPEATED/TRAINING CONVECTION...AND THE COLD FRONTAL STORMS IN ERN KS
   WILL ALSO SPREAD EWD/SEWD INTO SE KS AND W/SW MO THROUGH LATE
   EVENING.  THE STORMS WILL BE MAINTAINED BY A FEED OF MODERATE/STRONG
   INSTABILITY FROM THE S/SW...WHILE THE CONVECTION WILL GRADUALLY SAG
   S OF THE STRONGER BELT OF MID-UPPER FLOW.  THESE FACTORS...ALONG
   WITH THE ONGOING LARGELY LINEAR CONVECTIVE MODE...SUGGEST THAT LARGE
   HAIL AND DAMAGING WINDS WITH EMBEDDED STRONGER CELLS/BOWS WILL BE
   THE PRIMARY SEVERE THREATS.
   
   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 550. MEAN STORM
   MOTION VECTOR 28030.
   
   
   ...THOMPSON
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