MESOSCALE DISCUSSION 1384
   NWS STORM PREDICTION CENTER NORMAN OK
   0224 PM CDT SAT JUN 25 2011
   
   AREAS AFFECTED...ERN WY...FAR WRN SD...FAR WRN NEB...FAR NERN
   CO...FAR SERN MT
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 251924Z - 252100Z
   
   THE THREAT FOR SVR STORMS WITH LARGE HAIL AND DMGG WINDS IS
   INCREASING...AND THE ISSUANCE OF A SVR TSTM WATCH IS POSSIBLE.
   
   CUMULUS DEVELOPMENT CONTINUES OVER THE MEDICINE BOW MOUNTAINS...AND
   MORE RECENTLY THE LARAMIE MOUNTAINS...OF SRN WY...IN RESPONSE TO
   OROGRAPHIC INFLUENCES AND STEEP LOW-LEVEL LAPSE RATES DRIVEN BY
   STRONG HEATING OVER HIGHER TERRAIN. ALSO CONTRIBUTING TO THIS
   DEVELOPMENT...A PLUME OF STEEP MID-LEVEL LAPSE RATES OVERLAYS THIS
   REGION...WITH THE DENVER 12Z SOUNDING INDICATING A 700-500-MB LAPSE
   RATE OF 8.2 C/KM. DURING THE NEXT FEW HOURS...CONTINUED INSOLATION
   SUPPORTING FURTHER STEEPENING OF LOW-TO-MID-LEVEL LAPSE RATES WILL
   FOSTER THE DEVELOPMENT OF ADDITIONAL...AND DEEPENING OF
   EXISTING...CONVECTION OVER THE MOUNTAINS OF ERN WY AND FAR NERN CO.
   ONCE WLY/W-SWLY STEERING-LAYER FLOW SHIFTS CONVECTION OVER THE LOWER
   ELEVATIONS WHERE GREATER BOUNDARY-LAYER MOISTURE AND POTENTIAL
   INSTABILITY ARE PRESENT...THE OVERALL SVR THREAT COULD INCREASE.
   LARGE HAIL WILL BE POSSIBLE...WITH LARGE TEMPERATURE-DEWPOINT
   DEPRESSIONS AOA 20F SUPPORTING SVR WIND GUSTS. THIS ACTIVITY MAY
   ALSO BE ENHANCED ALONG A WEAK SFC BAROCLINIC ZONE CURRENTLY
   EXTENDING FROM SERN MT INTO CNTRL WY...WHICH COINCIDES WITH A REGION
   OF RELATIVELY RICHER LOW-LEVEL MOISTURE.
   
   ..COHEN.. 06/25/2011
   
   
   ATTN...WFO...LBF...UNR...BOU...CYS...BYZ...RIW...
   
   LAT...LON   45200458 44550351 42760268 41300302 40720353 40590430
               40690521 40950551 41300559 41610545 42070515 42530523
               42890571 43380625 43750644 44520630 45040546 45200458