SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 556
   NWS STORM PREDICTION CENTER NORMAN OK
   940 PM CDT SUN JUL 4 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHERN AND CENTRAL KANSAS
          NORTHERN OKLAHOMA
   
   EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 940 PM UNTIL
   400 AM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 90 STATUTE MILES
   NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF DODGE
   CITY KANSAS TO 30 MILES SOUTHEAST OF CHANUTE KANSAS.
   
   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...THIS SEVERE THUNDERSTORM WATCH REPLACES
   SEVERE THUNDERSTORM WATCH NUMBER 554. WATCH NUMBER 554 WILL NOT BE
   IN EFFECT AFTER 940 PM CDT. CONTINUE...WW 551...WW 555...
   
   DISCUSSION...STRONG LOW LEVEL JET WILL LIKELY CONTINUE FOCUSING
   STRONG TO SEVERE THUNDERSTORMS ACROSS THIS REGION OVERNIGHT...GIVEN
   INFLUX OF MODERATE INSTABILITY AND STEEP LAPSE RATES.  EXPECT
   SHORTWAVE TROUGH NOW MOVING INTO THE CENTRAL HIGH PLAINS WILL AID IN
   SHIFTING MCS ESEWD INTO SERN KS AND NERN OK LATER THIS EVENING. 
   ONCE FORWARD PROPAGATING SYSTEM DEVELOPS...DAMAGING WINDS WILL
   BECOME PRIMARY SEVERE THREAT.  OTHERWISE...LARGE HAIL SHOULD
   ACCOMPANY MORE CELLULAR DEVELOPMENT OVER THE TOP OF COLD POOL
   DEVELOPING OVER SWRN KS.
   
   AVIATION...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 500. MEAN STORM
   MOTION VECTOR 24035.
   
   
   ...EVANS