A cold, early-season storm will push into northern parts of the state this evening and continue to dig south overnight into early Thursday morning.  Expect increasing clouds and developing rain showers today for northern Wyoming  as this storm system approaches the area.  Rain showers will then turn to snow or a rain/snow mix by early evening.  The northern and western mountains will see heavy snow at times overnight.  Lower elevations in northern Wyoming, especially along I-90,  will see light to moderate snowfall.  Reduced visibility with developing slick and icy spots will be possible along I-90 and northern parts of I-25 (Casper to Buffalo)  late tonight into early Thursday morning.  Meanwhile, rain showers will develop this afternoon through the overnight hours for central and eastern parts of the state.  Visibility could be also reduced at times tonight into early Thursday morning along I-25 (Colorado state line to Casper) and I-80  (Nebraska state line to Rawlins) due to areas of patchy fog.  Daytime highs today will stay in the 40's for northern Wyoming, 50's for central and southern Wyoming with possible low 60's across the far southwest.

Moderate to heavy snow will continue to be possible for the northern and western mountains through mid-day on Thursday.  Expect light to moderate snowfall for lower elevations in northern and central parts of Wyoming as well as the southern mountains.  Rain showers will be possible during the day across lower elevations in southeastern and southwestern Wyoming.  There will then be a chance for light snow across southeastern Wyoming on Thursday night.  Expect slightly reduced visibility at times for much of the state on Thursday due to areas of patchy fog.  Road surfaces will also be wet and slick during the day, then turn to black ice overnight.  Daytime highs will remain in the 30's to lower 40's for northern and central Wyoming, while 40's and 50's will be possible for southern parts of the state.