Another cold front will pass through Wyoming tonight and early tomorrow morning bringing more cool air in from western Canada. High temperatures on Saturday will only reach the 60s and 70s on the plains with 50s and 60s in the mountains. Temperatures Saturday night will drop into the 40s with the higher valleys and basins dropping into the upper 30s. Temperatures will be steady on Sunday before warming into the 70s and 80s on Monday. Chances for thunderstorms will be quite low all weekend with only a few isolated thunderstorms developing near the Colorado border on Monday.