Temperatures will be warm and pleasant today, with most of the state into the 60's and 70's.  Expect nice weather across central and eastern Wyoming, with plenty of sunshine and fair conditions.  Some of western Wyoming could see some scattered showers or isolated thunderstorms later today and tonight.  Tuesday's weather will be more active, yet still warm with partial sunshine.  But there will be a greater chance for developing showers and thunderstorms on Tuesday, and statewide.  A cold front approaches Tuesday night into Wednesday morning, pushing scattered rain and snow into parts of Wyoming.  Winds increase by the middle of the week as well.  No significant snow accumulation is expected.