Mesoscale Discussion 0872 NWS Storm Prediction Center Norman OK 0334 PM CDT Sun Jun 07 2020 Areas affected...Central/Eastern/Northeast WY...Far Southeast MT Concerning...Severe potential...Watch unlikely Valid 072034Z - 072230Z Probability of Watch Issuance...20 percent SUMMARY...An isolated severe threat will persist eastward/northeastward from central WY into eastern/northeastern WY and far southeast MT over the next few hours. DISCUSSION...A poorly organized thunderstorm cluster continues to move northward across into central WY. This cluster is moving along the eastern periphery of the stronger forcing for ascent attendant to the shortwave trough moving into the northern Rockies. Lead edge of this forcing appears to be delineated well by the increased cloudiness extending across western WY and back into northeast UT. This forcing for ascent will continue gradually eastward, helping to support the ongoing storms and promote additional development. The air mass is relatively dry, limiting instability and tempering updraft strength and persistence. Even so, enough buoyancy and forcing exist for continued development. Moderate vertical shear will contribute to some loosely organized structures capable of strong wind gusts and isolated hail. KRKS in southwest WY recently gusted to 44 kt. Expectation is for an isolated severe threat to persist eastward/northeastward from central WY into eastern/northeastern WY and far southeast MT over the next few hours. ..Mosier/Thompson.. 06/07/2020 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...UNR...CYS...BYZ...RIW... LAT...LON 41800743 41750900 43170923 44620844 45330550 44220463 42930475 42070643 41800743