SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 256
   NWS STORM PREDICTION CENTER NORMAN OK
   1040 PM CDT SAT MAY 22 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHERN IOWA
          NORTHEAST KANSAS
          NORTHWEST MISSOURI
          SOUTHEAST NEBRASKA
   
   EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1040 PM
   UNTIL 400 AM CDT.
   
   TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 90 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES NORTH AND
   SOUTH OF A LINE FROM 20 MILES SOUTHWEST OF CONCORDIA KANSAS TO 35
   MILES EAST OF CEDAR RAPIDS IOWA.
   
   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...THIS TORNADO WATCH REPLACES TORNADO
   WATCH NUMBER 251...TORNADO WATCH NUMBER 253...TORNADO WATCH NUMBER
   254. WATCH NUMBER 251 253 254 WILL NOT BE IN EFFECT AFTER 1040 PM
   CDT. CONTINUE...WW 255...
   
   DISCUSSION...INTENSE SUPERCELLS WILL CONTINUE AS VERY IMPRESSIVE
   SHEAR PROFILES AND UNSTABLE AIR MASS CONTINUES ACROSS MUCH OF WATCH
   AREA.  STORMS WILL EVOLVE MORE INTO SHORT LINES/BOWS INCREASING WIND
   DAMAGE POTENTIAL.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 80 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
   MEAN STORM MOTION VECTOR 25045.
   
   
   ...HALES