SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 745
   NWS STORM PREDICTION CENTER NORMAN OK
   345 PM CDT THU AUG 25 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          WEST CENTRAL MINNESOTA
          NORTH CENTRAL NEBRASKA
          EASTERN SOUTH DAKOTA
   
   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
   1100 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 APPROXIMATELY ALONG AND 65
   STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTHEAST OF
   AINSWORTH NEBRASKA TO 75 MILES NORTH NORTHEAST OF WATERTOWN SOUTH
   DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
   WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
   
   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 744...
   
   DISCUSSION...STRONG STORMS CONTINUE TO DEVELOP/INTENSIFY ALONG COLD
   FRONTAL BOUNDARY. AIR MASS IS VERY UNSTABLE DUE TO HEATING WITH
   MLCAPE AROUND 3000 J/KG AND LIFTED INDICES -10/-11.  LIMITING FACTOR
   IS STRATUS DECK OVER PARTS OF ERN SD...BUT LATEST SATELLITE PICTURES
   SHOWS SOME EROSION TO ALLOW SOME DESTABILIZATION NEXT SEVERAL HOURS.
   
   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 450. MEAN STORM
   MOTION VECTOR 25030.
   
   
   ...MCCARTHY