SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 319
   NWS STORM PREDICTION CENTER NORMAN OK
   345 PM CDT FRI MAY 28 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTHWEST IOWA
          SOUTHWEST MINNESOTA
          NORTHEAST NEBRASKA
          EASTERN AND SOUTHERN SOUTH DAKOTA
   
   EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 345 PM UNTIL 1000
   PM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 65
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 115 STATUTE MILES
   EAST AND WEST OF A LINE FROM 35 MILES NORTH OF HURON SOUTH DAKOTA
   TO 35 MILES SOUTH SOUTHEAST OF NORFOLK NEBRASKA.
   
   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...THUNDERSTORMS EXPECTED TO DEVELOP DURING THE NEXT 1-2
   HRS INVOF WARM FRONT/LEE TROUGH INTERSECTION IN NE NEB/SE SD.  OTHER
   STORMS MAY ALSO FORM ABOVE FRONTAL SURFACE FARTHER E INTO SW MN/NW
   IA.  STEEP LOW TO MID LEVEL LAPSE RATES AND 40 KT WSWLY CLOUD LAYER
   SHEAR SUGGEST THREAT FOR SUSTAINED STORMS/SUPERCELLS WITH HAIL AND
   POSSIBLY DAMAGING WIND.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 55
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 27025.
   
   
   ...CORFIDI