MESOSCALE DISCUSSION 0870
   NWS STORM PREDICTION CENTER NORMAN OK
   0849 PM CDT MON MAY 25 2009
   
   AREAS AFFECTED...PORTIONS WRN KS...ERN PANHANDLES OF TX/OK...EXTREME
   NWRN OK.
   
   CONCERNING...HEAVY RAINFALL 
   
   VALID 260149Z - 260445Z
   
   RAIN RATES 1-2 INCHES/HOUR ARE EXPECTED FROM TSTMS OVER PORTIONS OF
   THIS SWATH...AND LOCALIZED RATES MAY EXCEED 2 INCHES/HOUR IN ERN TX
   PANHANDLE WHERE COMBINATION OF BUOYANCY...STORM-RELATIVE LOW LEVEL
   WIND AND INFLOW-LAYER THETAE SHOULD REMAIN GREATEST.
   
   BKN BAND OF CONVECTION -- WITH INFLECTION POINT WRAPPING INTO MVC
   OVER CENTRAL PANHANDLE OF OK -- IS FCST TO MOVE GENERALLY EWD 10-15
   KT.  ACTIVITY WILL AFFECT CORRIDOR FROM TREGO/ELLIS COUNTIES KS
   THROUGH GCK/DDC AREA...ERN OK PANHANDLE...PORTIONS ELLIS/HARPER
   COUNTIES OK...AND NERN TX PANHANDLE.  SOME BACKBUILDING ALSO IS
   POSSIBLE INTO E-CENTRAL TX PANHANDLE...ALONG AND JUST BEHIND OUTFLOW
   BOUNDARY.  TSTMS SHOULD BE MAINTAINED FOR ANOTHER FEW HOURS OVER
   MUCH OF THIS AREA AMIDST MOISTURE TRANSPORT ASSOCIATED WITH SLY TO
   SSELY LLJ OF 20-30 KT...AND AROUND 1.25 INCH PW.  QUASI-LINEAR MODE
   WILL BE SUPPORTED BY FORCED ASCENT OF MOIST AIR SLAB ALONG
   COLLECTIVE OUTFLOW BOUNDARY.  STORM MERGERS -- ESPECIALLY OVER TX
   PANHANDLE AND INVOF MVC -- ALSO WILL ENHANCE HAZARD FROM HEAVY
   RAINFALL.
   
   ..EDWARDS.. 05/26/2009
   
   
   ATTN...WFO...OUN...DDC...GLD...AMA...
   
   LAT...LON   35250092 35910093 36380064 36820080 37110132 37550089
               38090077 38320046 38960018 38859941 37719968 36979963
               36449960 35240013 35250092