SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 454
   NWS STORM PREDICTION CENTER NORMAN OK
   605 PM CDT FRI JUN 10 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          THE OKLAHOMA PANHANDLE
          WESTERN TEXAS AND THE TEXAS PANHANDLE
   
   EFFECTIVE THIS FRIDAY NIGHT FROM 605 PM UNTIL MIDNIGHT 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 APPROXIMATELY ALONG AND 70
   STATUTE MILES EAST AND WEST OF A LINE FROM 100 MILES NORTHEAST OF
   DALHART TEXAS TO 25 MILES SOUTHWEST OF LUBBOCK TEXAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU4).
   
   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
   TORNADO WATCH NUMBER 449. WATCH NUMBER 449 WILL NOT BE IN EFFECT
   AFTER 605 PM CDT. CONTINUE...WW 450...WW 451...WW 452...WW 453...
   
   DISCUSSION...BANDS OF STORMS...INCLUDING POSSIBLE EMBEDDED
   SUPERCELLS...EXPECTED TO MOVE GENERALLY W TO E ACROSS WW THIS
   EVENING AHEAD OF SRN RCKYS SHORTWAVE IMPULSE.  AIR MASS OVER MUCH OF
   THE REGION HAS BEEN OVERTURNED BY PREVIOUS STORMS...AND PREDOMINANT
   STORM MODE LIKELY WILL BE QUASI-LINEAR.  THESE FACTORS SHOULD LIMIT
   TORNADO THREAT DESPITE PRESENCE OF MOIST SSELY LOW LEVEL FLOW AND
   STRENGTHENING SWLY MID LEVEL JET.
   
   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 23030.
   
   
   ...CORFIDI