MESOSCALE DISCUSSION 1389
   NWS STORM PREDICTION CENTER NORMAN OK
   1022 PM CDT SAT JUN 25 2011
   
   AREAS AFFECTED...SRN IL...SRN IND AND WRN KY
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 260322Z - 260415Z
   
   STORMS WILL LIKELY DEVELOP SEWD THROUGH SRN IL...SRN IND AND WRN
   THROUGH W-CNTRL KY WITH A THREAT FOR ISOLATED DAMAGING WIND AND HAIL
   INTO THE EARLY MORNING. AREA IS BEING MONITORED FOR WW ISSUANCE.
   
   LATE THIS EVENING A QUASI-STATIONARY FRONT EXTENDS ACROSS SRN MO
   SEWD THROUGH SWRN KY INTO MIDDLE AND SERN TN. WARM SECTOR SOUTH OF
   THIS BOUNDARY IS MODERATELY UNSTABLE /2500-3000 J/KG MUCAPE/ BUT IS
   CAPPED. HOWEVER...STORMS SHOULD CONTINUE DEVELOPING ON COOL SIDE OF
   THE FRONT WHERE CAP IS WEAKER AND SWLY LLJ WILL MAINTAIN INFLUX OF
   HIGHER THETA-E AIR ABOVE THE MORE STABLE SURFACE LAYER. ACTIVITY IS
   CURRENTLY IN THE PROCESS OF EVOLVING INTO AN MCS WITH NUMEROUS CELL
   MERGERS LIKELY TO OCCUR DURING THE NEXT HOUR OR TWO. STORMS WILL
   SUBSEQUENTLY MOVE SEWD ALONG INSTABILITY GRADIENT WHERE THEY WILL
   REMAIN EMBEDDED WITHIN 35-45 KT EFFECTIVE SHEAR SUFFICIENT FOR
   ORGANIZED STRUCTURES INCLUDING BOWING SEGMENTS. SOME BACKBUILDING
   MAY ALSO OCCUR ON THE SWRN FLANK INTO ERN AND SERN MO AS COLD POOL
   BECOMES BETTER ESTABLISHED.
   
   ..DIAL.. 06/26/2011
   
   
   ATTN...WFO...LMK...IND...PAH...
   
   LAT...LON   37658921 38108844 38828720 38248622 37188634 36738694
               37178831 37658921