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   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 140
   NWS STORM PREDICTION CENTER NORMAN OK
   310 AM CDT SAT MAY 1 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHERN ARKANSAS
          NORTHERN LOUISIANA
          A SMALL PART OF EAST CENTRAL TEXAS
   
   EFFECTIVE THIS SATURDAY MORNING FROM 310 AM UNTIL 900 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 50 STATUTE MILES
   EAST AND WEST OF A LINE FROM 80 MILES NORTHEAST OF EL DORADO
   ARKANSAS TO 150 MILES SOUTH SOUTHWEST OF EL DORADO ARKANSAS.
   
   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 138...WW 139...
   
   DISCUSSION...LATEST RUC ANALYSES INDICATE 45-50 KT MID LEVEL JET
   OVER NERN TX/SWRN AR ATTM...WITH SSWLY LLJ NOW OVER ERN TX EXPECTED
   TO SHIFT EWD INTO WRN LA THROUGH THE MID MORNING.  AIR MASS FEEDING
   CONVECTION OVER NERN TX/SRN AR/NWRN LA WILL REMAIN MODERATELY
   UNSTABLE.  THIS SHOULD SUSTAIN WIDESPREAD THUNDERSTORMS ACROSS THIS
   REGION INTO THE MID MORNING. DAMAGING WINDS AND LARGE HAIL ARE
   EXPECTED TO BE PRIMARY SEVERE THREATS WITH THESE STORMS. BOW ECHO
   NOW OVER SWRN AR MAY CONTINUE ENEWD AT 40 KT ACROSS THE REST OF SRN
   AR...WHILE ADDITIONAL BOWING STRUCTURES MAY EVOLVE ACROSS E-CENTRAL
   TX AND MOVE INTO NWRN LA...ENHANCING THE THREAT OF DAMAGING WINDS.
   
   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