SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 238
   NWS STORM PREDICTION CENTER NORMAN OK
   615 PM CDT SUN MAY 8 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL OKLAHOMA
   
   EFFECTIVE THIS SUNDAY EVENING FROM 615 PM UNTIL 1100 PM 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 45
   STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES WEST NORTHWEST
   OF PONCA CITY OKLAHOMA TO 20 MILES SOUTH OF ARDMORE OKLAHOMA.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU8).
   
   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...CONTINUE...WW 231...WW 232...WW 233...WW
   234...WW 235...WW 236...WW 237...
   
   DISCUSSION...SEVERE STORMS CONTINUE TO DEVELOP EWD FROM SW OK...WITH
   ADDITIONAL DEVELOPMENT POSSIBLE ALONG N-S DRYLINE INTO NRN OK...AND
   AN OUTFLOW BOUNDARY DRIFTING WWD INTO CENTRAL OK FROM ERN OK. 
   STRONG INSTABILITY WILL SUPPORT A LARGE HAIL AND DAMAGING WIND
   THREAT.
   
   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 26025.
   
   
   ...THOMPSON