A large low pressure system will be settled over the state of Wyoming today, Tuesday, and Wednesday.  Within this large weather system, there will be faster-moving weather disturbances that push across the region during this time.  For today, expect cloudy skies, areas of patchy fog (especially early and late in the day), and colder than normal temperatures.  High temperatures will remain in the 30's and 40's.  Rain showers and possibly a few thunderstorms will be likely across lower elevations, with heavy rain possible at times.  For the mountains and higher elevations (including portions of I-80), wet snow or a rain/snow mix is expected today and tonight.  Watch out for reduced visibility with developing slushy to slick/icy roads.  By tonight, rain could mix with and turn to snow across lower elevations (above ~6,000 feet).  However, roads will stay mainly wet.  We will then see partly to mostly cloudy skies, breezy to gusty winds, and cooler than normal temperatures on Tuesday and Wednesday.  There will be a smaller chance for rain, mountain snow, and thunderstorms in western and central Wyoming, while conditions look to stay mainly dry elsewhere.