SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 515
   NWS STORM PREDICTION CENTER NORMAN OK
   500 PM CDT WED JUN 23 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTHEAST IOWA
          NORTHERN ILLINOIS
          SOUTHERN LOWER MICHIGAN
          SOUTHERN WISCONSIN
          LAKE MICHIGAN
          LAKE ERIE
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 500 PM UNTIL
   1100 PM CDT.
   
   HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 60 STATUTE MILES
   NORTH AND SOUTH OF A LINE FROM 30 MILES NORTHWEST OF DUBUQUE IOWA
   TO 5 MILES NORTHEAST OF MOUNT CLEMENS MICHIGAN.
   
   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 511...WW 512...WW 513...WW
   514...
   
   DISCUSSION...VERY STRONG MID LEVEL WIND MAX AND S/WV TROUGH MOVING
   ESEWD ACROSS UPPER MS VALLEY INTO WRN GREAT LAKES THIS EVENING. WITH
   PLUME OF MOIST AND MODERATELY UNSTABLE AIR MASS EXTENDING EWD ACROSS
   WATCH...POTENTIAL WILL INCREASE INTO THIS EVENING FOR DEVELOPMENT OF
   SEVERE THUNDERSTORMS AS S/WV APPROACHES.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 27040.
   
   
   ...HALES