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Severe Thunderstorm Watch 318
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WW0318 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
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.
   SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 318
   NWS STORM PREDICTION CENTER NORMAN OK
   240 PM CDT MON JUN 1 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SMALL PART OF EASTERN IOWA
          NORTHERN ILLINOIS
          NORTHERN INDIANA
          LAKE MICHIGAN
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 240 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 65
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES SOUTH
   SOUTHWEST OF MOLINE ILLINOIS TO 20 MILES EAST SOUTHEAST OF FORT
   WAYNE INDIANA.  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.
   
   DISCUSSION...STORMS WILL INCREASE ALONG AND JUST S OF E/W BOUNDARY
   ACROSS NRN IN AND IL.  WITH AN UNSTABLE AND VIRTUALLY UNCAPPED WARM
   SECTOR ALONG WITH 30-40KT OF SHEAR...STORMS WILL INCREASE TO SEVERE
   LEVELS AS THEY SPREAD DEVELOP E/SEWD THRU THE AFTERNOON.
   
   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.
   
   
   ...HALES
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