SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 654
   NWS STORM PREDICTION CENTER NORMAN OK
   800 PM CDT SUN JUL 18 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          WESTERN MINNESOTA
          NORTHEAST SOUTH DAKOTA
   
   EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 800 PM UNTIL
   100 AM CDT.
   
   TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS ALONG AND 115 STATUTE MILES EAST AND
   WEST OF A LINE FROM 50 MILES NORTHEAST OF ABERDEEN SOUTH DAKOTA TO
   40 MILES SOUTHWEST OF WATERTOWN SOUTH DAKOTA.
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 653...
   
   DISCUSSION...SUPERCELL NOW IN S CNTRL ND EXPECTED TO CONTINUE SEWD
   INTO NRN SD SHORTLY...WITH ADDITIONAL STORMS EXPECTED TO DEVELOP IN
   SE ND DURING THE NEXT 1-2 HRS DOING THE SAME.  WHILE NOTABLE CINH
   EXIST IN NE SD /PER 00Z RAOB/...ENVIRONMENT DOES NOT APPEAR OVERLY
   HOSTILE FOR EXISTING ROTATING STORMS.  ALSO...CONTINUED SEWD MOTION
   OF MESOSCALE  TROUGH/AREA OF ASCENT MAY SOMEWHAT OFFSET DIURNAL
   COOLING AND SUPPORT A RISK FOR ISOLATED TORNADOES IN ADDITION TO
   HAIL/HIGH WIND.
   
   AVIATION...TORNADOES AND 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 34020.
   
   
   ...CORFIDI