MESOSCALE DISCUSSION 1242
   NWS STORM PREDICTION CENTER NORMAN OK
   1152 AM CDT THU JUN 16 2011
   
   AREAS AFFECTED...EXTREME SERN KS INTO NERN OK
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 161652Z - 161745Z
   
   THREAT FOR ISOLATED DAMAGING WIND AND LARGE HAIL MAY INCREASE THIS
   AFTERNOON FROM EXTREME SERN KS INTO NERN OK. A SEVERE THUNDERSTORM
   WATCH MAY BE NEEDED SOON.
   
   LATE THIS MORNING A CONVECTIVE OUTFLOW BOUNDARY EXTENDS FROM SERN KS
   WWD THROUGH SWRN KS. THIS BOUNDARY INTERSECTS ANOTHER OUTFLOW
   BOUNDARY IN SERN KS THAT STRETCHES FARTHER SE THROUGH NERN OK ONTO
   NWRN AR. STORMS CONTINUE DEVELOPING AT THE BOUNDARY INTERSECTION
   OVER SERN KS AS WELL AS WITHIN THE ZONE OF ISENTROPIC LIFT IN NERN
   OK. THE ATMOSPHERE IS DESTABILIZING AND SURFACE BASED CONVECTIVE
   INHIBITION IS WEAKENING IN VICINITY OF THE BOUNDARIES FROM N-CNTRL
   THROUGH NERN OK. AS THE BOUNDARY LAYER WARMS THROUGH THE 80S INTO
   THE LOW 90S MLCAPE WILL APPROACH OR EXCEED 2500 J/KG. RUC ANALYSIS
   INDICATES AN IMPULSE MOVING OVER TOP OF SHORTWAVE RIDGE AND DROPPING
   SEWD INTO SERN KS. A PERSISTENT SLY LLJ WILL MAINTAIN FAVORABLE
   STORM RELATIVE INFLOW...AND STORMS WILL LIKELY CONTINUE DEVELOPING
   SEWD NEXT FEW HOURS GENERALLY ALONG AND ON COOL SIDE OF THE OUTFLOW
   BOUNDARY IN NERN OK. EFFECTIVE VERTICAL SHEAR FROM 35-40 KT WILL
   SUPPORT POTENTIAL FOR ORGANIZED STORM STRUCTURES WITH DAMAGING WIND
   AND LARGE HAIL THE MAIN THREATS.
   
   ..DIAL.. 06/16/2011
   
   
   ATTN...WFO...TSA...ICT...OUN...
   
   LAT...LON   37399573 36859523 36049445 35589441 35249481 35289584
               35699660 36119706 36479737 36819753 37169755 37329664
               37399573