MESOSCALE DISCUSSION 1176
   NWS STORM PREDICTION CENTER NORMAN OK
   0747 PM CDT FRI JUN 10 2011
   
   AREAS AFFECTED...N-CNTRL/NERN OK...SERN KS...WRN/CNTRL/NERN MO...FAR
   WRN IL
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 458...
   
   VALID 110047Z - 110145Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 458
   CONTINUES.
   
   A CONTINUING THREAT OF LARGE HAIL AND DMGG WINDS WILL REMAIN FOCUSED
   PRIMARILY ALONG A SLOW MOVING COLD FRONT THAT EXTENDS FROM SWRN OK
   NEWD INTO ERN MO/WRN IL. A NOTABLE UPSWING IN CONVECTION HAS
   OCCURRED OVER THE PAST FEW HRS...FIRST OVER SWRN OK WHERE AN UPPER
   IMPULSE BECAME JUXTAPOSED WITH THE COLD FRONT AND AIDED IN THE
   DEVELOPMENT OF STRONG-SVR STORMS. MODEST DEEP-LAYER SHEAR AND SFC
   T-TD SPREADS AROUND 30 DEG F HAVE SUPPORTED STRONG COLD POOL
   DEVELOPMENT WITH CONVECTION ORGANIZING INTO MULTICELL CLUSTERS
   /THOUGH OCCASIONAL SUPERCELL STRUCTURES MAY STILL BE OBSERVED/. THIS
   ACTIVITY WILL SLOWLY PROGRESS EWD ACROSS CNTRL/NRN OK...BUT MAY
   WEAKEN WITH THE LOSS OF DIABATIC HEATING.
   
   FARTHER N/E...ACROSS SERN KS AND WRN MO...THUNDERSTORMS HAVE
   GENERALLY REMAINED MORE DISCRETE/ISOLATED...AND HAVE FORMED WITHIN
   AN ENVIRONMENT CONTAINING STRONGER ENVIRONMENTAL EFFECTIVE SHEAR
   /30-40 KTS/ THAN FARTHER S. THIS...ALONG WITH RICH BOUNDARY LAYER
   MOISTURE CONTRIBUTING TO MLCAPE VALUES AOA 2000 J/KG...WILL CONTINUE
   TO SUPPORT SUPERCELL STRUCTURES WITH AN ENHANCED POTENTIAL FOR LARGE
   HAIL AND DMGG WINDS. FARTHER E...THUNDERSTORMS HAVE INITIATED MORE
   RECENTLY OVER ERN MO AND ARE CONGEALING INTO A BROKEN LINE WITH A
   GLANCING INFLUENCE FROM A MORE POTENT UPPER SHORTWAVE TROUGH OVER
   MN.
   
   ..ROGERS.. 06/11/2011
   
   
   ATTN...WFO...ILX...LSX...DVN...SGF...EAX...TSA...TOP...ICT...
   OUN...
   
   LAT...LON   36139607 35509707 35119835 35089862 35769870 37399718
               38479557 39969199 40549079 40299042 38579026 36139607