MESOSCALE DISCUSSION 1240
   NWS STORM PREDICTION CENTER NORMAN OK
   1118 PM CDT WED JUN 15 2011
   
   AREAS AFFECTED...NORTHWEST OK
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 160418Z - 160515Z
   
   AN ISOLATED LARGE HAIL/DAMAGING WIND THREAT MAY CONTINUE EARLY IN
   THE OVERNIGHT ACROSS NORTHWEST OK.
   
   A PERSISTENT SUPERCELL HAS SHOWN MODEST SIGNS OF UPSCALE
   GROWTH/EXPANSION OVER THE PAST FEW HOURS ACROSS FAR SOUTHWEST KS AND
   NOW INTO HARPER COUNTY /FAR NORTHWEST/ OK AS OF 415Z. INTERCEPTING
   THIS STORM...REGIONAL DERIVED WINDS ARE NOW SAMPLING A 20-25 KT
   SOUTHERLY LOW LEVEL JET...WITH LOW LEVEL MOISTURE HAVING INCREASED
   OVER THE PAST FEW HOURS ACROSS MUCH OF OK AS PER SURFACE
   OBSERVATIONS/GPS DERIVED PW VALUES. WHILE THESE FACTORS...GIVEN
   STEEP LAPSE RATES ALOFT AND A STRONGLY VEERING WIND PROFILE...ARE
   FAVORABLE FOR STORM SUSTENANCE/REGENERATION OF VIGOROUS CONVECTION
   ALONG ITS SOUTHERN FLANK/GUST FRONT...INCREASING CINH ABOVE THE
   SURFACE/IN THE INFLOW LAYER OVER THE NEXT FEW HOURS SHOULD LEAD TO A
   WEAKENING TREND THROUGH 05Z-07Z.
   
   ..GUYER.. 06/16/2011
   
   
   ATTN...WFO...OUN...DDC...AMA...
   
   LAT...LON   36270003 36909984 37069865 36619812 35889829 35699972
               36270003