MESOSCALE DISCUSSION 1452
   NWS STORM PREDICTION CENTER NORMAN OK
   0249 PM CDT THU JUN 30 2011
   
   AREAS AFFECTED...WRN/NRN CO...SERN/SCNTRL WY...WRN NEB PNHDL
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 576...577...
   
   VALID 301949Z - 302145Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   576...577...CONTINUES.
   
   HIGH-BASED STORMS ALONG THE HIGH PLAINS HAVE BEEN STRUGGLING
   SOMEWHAT AS THEY ENCOUNTER SLIGHTLY STRONGER CINH. 
   HOWEVER...LEADING EDGE OF ENHANCED LARGE-SCALE ASCENT WAS CROSSING
   THE CONTINENTAL DIVIDE AND WILL CONTRIBUTE TO AN UPTICK IN STORMS
   FROM SERN WY...WRN NEB PNHDL SWD INTO NERN CO AS THE CAP WEAKENS
   THROUGH 22Z. 
   
   WEST OF THE DIVIDE...DEEP WSW TROPOSPHERIC WIND PROFILES INCREASING
   TO 50+ KTS AT 500 MB WILL CONTINUE TO FOSTER BOWING LINE SEGMENTS AS
   HIGH-BASED STORMS MATURE OVER CNTRL CO.  MEANWHILE...TCU/CBS
   DEVELOPING EAST OF THE DIVIDE WILL BEGIN TO ENCOUNTER A STRONGLY
   HEATED AND SLIGHTLY MORE MOIST BOUNDARY LAYER ARCING UPSLOPE FROM
   NERN CO/SWRN NEB INTO SERN WY.  HERE...A MIX OF SUPERCELLS AND
   MULTICELLS STORMS MAY BECOME QUITE ROBUST OWING TO ROUGHLY 45 KTS OF
   0-8KM SHEAR AND VERY STEEP H7-H5 LAPSE RATES.  WHILE DRY SUB-CLOUD
   LAYER WILL LIMIT TORNADO PRODUCTION...DCAPE OF 1300+ J/KG AND FAST
   FLOW ALOFT WILL LIKELY YIELD DAMAGING/SVR WINDS ALONG WITH HAIL.
   
   ..RACY.. 06/30/2011
   
   
   ATTN...WFO...PUB...BOU...CYS...RIW...GJT...
   
   LAT...LON   37100858 40620868 42790486 42450325 39880316 38950577
               38220757 37100858