MESOSCALE DISCUSSION 1804
   NWS STORM PREDICTION CENTER NORMAN OK
   0628 PM CDT THU AUG 06 2009
   
   AREAS AFFECTED...NERN CO / SWRN NEB / NWRN KS
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 062328Z - 070100Z
   
   THE THREAT FOR SEVERE STORMS CAPABLE OF DAMAGING WIND GUSTS AND HAIL
   APPEARS TO BE INCREASING ACROSS DISCUSSION AREA.  CONVECTIVE TRENDS
   ARE BEING MONITORED FOR A WW.
   
   TSTMS ARE GRADUALLY INCREASING IN COVERAGE AND INTENSITY OFF THE
   FRONT RANGE THIS EVENING WITH RECENT DEVELOPMENT OF A MORE ISOLATED
   STORM NEAR AKO.  THIS ACTIVITY MAY IN PART BE ASSOCIATED WITH
   FORCING FOR ASCENT ATTENDANT TO SHORT WAVE TROUGH MOVING THROUGH WY
   /PER CURRENT WATER VAPOR IMAGERY/.  PROXIMITY TO MIDLEVEL RIDGE AXIS
   IS MAINTAINING A CAP ACROSS AIR MASS BASED ON RUC OBJECTIVE FIELDS. 
   THUS...THERE IS SOME UNCERTAINTY AS TO WHETHER ONGOING STORMS WILL
   BE ABLE TO SUSTAIN THEMSELVES EWD INTO PLAINS.  GIVEN THE PRESENCE
   OF STEEP LOW TO MIDLEVEL LAPSE RATES...MLCAPE OF 1000-2000 J/KG AND
   30-40 KT OF DEEP-LAYER SHEAR...THE POTENTIAL FOR DAMAGING WINDS AND
   HAIL WILL EXIST SHOULD STORMS PERSIST THROUGH THE EVENING.
   
   ..MEAD.. 08/06/2009
   
   
   ATTN...WFO...LBF...GLD...BOU...
   
   LAT...LON   39610434 40280445 40660421 40880354 40860234 40700186
               40060133 39240150 38770221 38690338 38820382 39610434