MESOSCALE DISCUSSION 1086

        MESOSCALE DISCUSSION 1086     NWS STORM PREDICTION CENTER NORMAN OK     0154 PM CDT WED JUN 06 2012          AREAS AFFECTED...NE CO...SE WY...NEB PANHANDLE          CONCERNING...SEVERE POTENTIAL...WATCH LIKELY           VALID 061854Z - 062100Z          PROBABILITY OF WATCH ISSUANCE...80 PERCENT          SUMMARY...THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER THE CO FRONT     RANGE NWD INTO SE WY/NEB PANHANDLE BETWEEN 20Z-22Z AND MOVE EAST     INTO AN INCREASINGLY UNSTABLE AIR MASS. SEVERE THUNDERSTORMS ARE     LIKELY POSING A LARGE HAIL/DAMAGING WIND THREAT WITH ISOLATED     TORNADOES ALSO POSSIBLE. WW ISSUANCE IS LIKELY BY 21Z.          DISCUSSION...VISIBLE SATELLITE IMAGERY SHOWS CU FIELD DEVELOPING     OVER THE HIGHER TERRAIN OF NORTH-CENTRAL CO AND ALSO ALONG AND IN     ADVANCE OF A WEAK COLD FRONT FROM THE NEB PANHANDLE INTO NE CO/SE     WY. AS THE AFTERNOON PROGRESSES...THUNDERSTORM DEVELOPMENT IS     EXPECTED ALONG THE CO FRONT RANGE NWD INTO SE WY AND NEB PANHANDLE     WITH STORMS MOVING INTO A MODERATELY UNSTABLE AIR MASS CHARACTERIZED     BY MLCAPE VALUES OF 1500-2000 J/KG. DEEP-LAYER SHEAR VALUES ARE ALSO     EXPECTED TO INCREASE WITH TIME TO AROUND 35-40 KTS BY LATE AFTN. IN     THIS ENVIRONMENT...ORGANIZED MULTICELL/SUPERCELL STORMS ARE LIKELY.     RELATIVELY STEEP MID-LEVEL LAPSE RATES AND THE POTENTIAL FOR UPDRAFT     ROTATION SUGGESTS LARGE HAIL IS LIKELY. STEEP LOW-LEVEL LAPSE RATES     INDICATE A THREAT OF DAMAGING WIND GUSTS AS WELL WITH THE STRONGER     STORMS. ISOLATED TORNADOES ARE ALSO POSSIBLE WHERE STORMS INTERACT     WITH LOW-LEVEL BOUNDARIES.          A WW WILL LIKELY BE REQUIRED BY 21Z.          ..BUNTING/WEISS.. 06/06/2012               ATTN...WFO...LBF...UNR...PUB...BOU...CYS...