SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 662
   NWS STORM PREDICTION CENTER NORMAN OK
   150 PM CDT WED JUL 21 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          WESTERN MINNESOTA
          NORTHEAST SOUTH DAKOTA
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 150 PM UNTIL
   700 PM CDT.
   
   HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   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 40 MILES SOUTHWEST OF ABERDEEN
   SOUTH DAKOTA TO 45 MILES NORTH NORTHEAST OF REDWOOD FALLS
   MINNESOTA.
   
   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 661...
   
   DISCUSSION...STRONG/SEVERE THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY
   ALONG AND AHEAD OF COOL FRONT MOVING THRU ERN SD.  LOW LEVEL
   MOISTURE REMAINS  HIGH EWD INTO MN AND WITH STRONG HEATING AND STEEP
   LAPSE RATES...POTENTIAL FOR LARGE HAIL AND DAMAGING WINDS WILL
   INCREASE AS STORMS MOVE EWD UNDER STRONG MID/UPPER JET.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 28035.
   
   
   ...HALES