MESOSCALE DISCUSSION 0927
   NWS STORM PREDICTION CENTER NORMAN OK
   0742 AM CDT WED MAY 30 2007
   
   AREAS AFFECTED...S-CNTRL OK INTO N-CNTRL TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 309...
   
   VALID 301242Z - 301415Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 309
   CONTINUES.
   
   SEVERE THREAT...INCLUDING DAMAGING WINDS AND LARGE HAIL...IS
   EXPECTED TO CONTINUE FROM FAR S-CNTRL OK INTO N-CNTRL TX THROUGH
   14-15Z.
   
   MATURE BOW ECHO CONTINUES TO MOVE/PROPAGATE SEWD THIS MORNING AT
   30-35 KT WITH LEADING EDGE OF STRONGEST UPDRAFTS EXTENDING FROM
   HUGHES AND COAL COUNTIES IN OK SWWD TO CLAY COUNTY TX AS OF 1230Z. 
   OK MESONET OBSERVATIONS HAVE RECORDED SEVERAL WIND GUSTS OF 40 KT
   WITH ISOLATED 45-50 KT GUSTS FROM CLEVELAND AND GRADY COUNTIES SSEWD
   TO PONTOTOC AND MURRAY COUNTIES OVER THE PAST COUPLE OF HOURS.
   
   12Z FTW SOUNDING IS LIKELY QUITE REPRESENTATIVE OF AMBIENT...INFLOW
   AIR MASS WITH A RELATIVELY DEEP LOW-LEVEL MOISTURE PROFILE BENEATH
   STEEP MID-LEVEL LAPSE RATES...RESULTING IN AN MUCAPE OF 1500-2000
   J/KG.  GIVEN THIS INSTABILITY AND ORGANIZED SYSTEM COLD POOL /DRIVEN
   BY PRONOUNCED 50-60 KT REAR INFLOW JET PER PURCELL OK
   PROFILER/...EXPECT THIS BOWING MCS TO CONTINUE SEWD THROUGH PORTIONS
   OF N-CNTRL TX THOUGH MID-MORNING...NAMELY E OF AN SPS-MWL LINE. 
   WHILE LOCALLY DAMAGING WINDS WILL BE THE PRIMARY SEVERE WEATHER
   THREAT...ISOLATED LARGE HAIL WILL ALSO BE POSSIBLE.
   
   ..MEAD.. 05/30/2007
   
   
   ATTN...WFO...TSA...FWD...OUN...
   
   34959728 34889674 34619667 34579646 34359624 34209582
   33399572 32809577 32719640 32389650 32429765 32899773
   32909866 33609871 33739919 34289914 34679837