SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 788
   NWS STORM PREDICTION CENTER NORMAN OK
   410 PM CDT THU AUG 26 2004
   
   CORRECTED FOR  DELETION OF MARQUETTE COUNTY WI
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
     MUCH OF IOWA
     SOUTHEAST MINNESOTA
     NORTHWEST MISSOURI
     SOUTHEAST NEBRASKA
     SOUTHWEST WISCONSIN
   
   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 410 PM UNTIL
   1000 PM CDT.
   
   TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS ALONG AND 100 STATUTE MILES EAST AND
   WEST OF A LINE FROM 20 MILES WEST OF CAMP DOUGLAS WISCONSIN TO 15
   MILES WEST SOUTHWEST OF FALLS CITY NEBRASKA.
   
   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 788...
   
   DISCUSSION...RAPID DEVELOPMENT OF SEVERE THUNDERSTORMS WILL OCCUR
   ALONG FRONTAL BOUNDARY FROM NRN IA INTO SERN NEB.  EXTREME
   INSTABILITY AND STRONG DEEP LAYER SHEAR SUPPORT SUPERCELLS INCLUDING
   VERY LARGE HAIL AND TORNADOES.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600.
   MEAN STORM MOTION VECTOR 24035.
   
   
   ...HALES