MESOSCALE DISCUSSION 0760
   NWS STORM PREDICTION CENTER NORMAN OK
   1108 AM CDT FRI MAY 08 2009
   
   AREAS AFFECTED...NWRN AR AND S CNTRL MO
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 266...
   
   VALID 081608Z - 081715Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 266
   CONTINUES.
   
   PRIMARY AND MORE SIGNIFICANT SEVERE THREAT HAS SHIFTED INTO TORNADO
   WATCH 267. HOWEVER...THREAT FOR MOSTLY HAIL AND POSSIBLY ISOLATED
   DAMAGING WIND GUSTS MAY PERSIST IN REMAINING PARTS WW 266...MAINLY
   ACROSS NCNTRL AND NW AR NEXT HOUR. WW 266 WILL EXPIRE AT 17Z. UNLESS
   STORMS ALONG TRAILING END OF OUTFLOW BOUNDARY BEGIN TO SHOW SIGNS OF
   INTENSIFICATION...ANOTHER WW FARTHER SOUTH WILL PROBABLY NOT BE
   NEEDED AT THIS TIME.
   
   DAMAGING BOW ECHO HAS SHIFTED EAST OF WW 266 AND IS LOCATED FROM
   SERN MO SWWD THROUGH NWRN AR. TRAILING END OF OUTFLOW BOUNDARY
   EXTENDS WWD INTO NCNTRL AND NWRN AR AND IS MOVING SWD. MESOSCALE
   LIFT PRODUCED BY A STRONG 45-50 KT SWLY LOW LEVEL JET INTERSECTING
   THE TRAILING OUTFLOW BOUNDARY CONTINUES TO PROMOTE THUNDERSTORM
   DEVELOPMENT ALONG AND NORTH OF THIS FEATURE. HOWEVER...THE SWLY
   850-750 MB FLOW IS RESULTING IN NEWD TRANSPORT OF WARM AIR ALOFT
   WITH TEMPERATURES AROUND 23C AT THE BASE OF THE EML. THIS HAS
   CONTRIBUTED TO A STRONG CAP ACROSS THE PRE-CONVECTIVE WARM
   SECTOR...WHICH SHOULD LIMIT FURTHER ROBUST THUNDERSTORM DEVELOPMENT
   AS THE BOUNDARY CONTINUES SWD.
   
   ..DIAL.. 05/08/2009
   
   
   ATTN...WFO...LZK...SGF...TSA...
   
   LAT...LON   36129445 36549359 36689340 37019316 37399272 37329147
               36259164 35249420 35669482 36129445