Partly cloudy in the evening...then mostly cloudy with a 20 percent chance of rain after midnight. Lows 29 to 33. North winds around 15 mph late in the evening.
Thursday
Partly cloudy with slight chance of rain in the morning...then cloudy with chance of rain in the afternoon. Highs 46 to 50. Chance of rain 50 percent.
Breezy. Chance of rain in the evening...then rain likely after midnight. Lows 30 to 34. North winds 15 to 20 mph. Chance of rain 60 percent.
Friday
Rain and snow likely in the morning...then snow likely in the afternoon. Snow accumulation up to 1 inch. Highs 36 to 40. North winds around 15 mph. Chance of precipitation 60 percent.
Rain and snow likely. Light snow accumulations. Lows in the mid to upper 20s. Chance of precipitation 70 percent.
Saturday
Snow likely in the morning...then snow and rain likely in the afternoon. Moderate snow accumulations. Highs in the mid to upper 30s. Chance of precipitation 70 percent.
Saturday Night
Snow likely. Moderate snow accumulations. Lows in the lower to mid 20s. Chance of snow 60 percent.
Sunday
Mostly cloudy. Chance of snow in the morning...then scattered rain showers and snow showers in the afternoon. Highs near 40. Chance of precipitation 40 percent.
Sunday Night
Partly cloudy. Isolated snow showers and rain showers in the evening. Lows in the lower to mid 20s. Chance of precipitation 20 percent.
... A major change to colder and snowy weather is headed for much of central and western Wyoming Thursday night through Sunday...
A cold storm system over the Gulf of Alaska is forecast to drop into the Great Basin on Thursday and then stall out over the southern Idaho... northern Utah area Friday into Saturday... moving slowly northeast through Sunday. At the same time... cold air will plunge southward out of Canada providing for strong upslope east of The Divide... especially Thursday night through Sunday. Snow will likely develop in the mountains by Thursday night... possibly becoming heavy at times and continuing through Sunday morning... then taper off through Sunday evening. The most significant mountain snowfall will likely be over the Wind River mountains... East Slope of the absarokas... Owl Creek and Bridger Mountains... southern big horns and Casper Mountain.
The lower elevations of central and southwest Wyoming will also have the potential for significant snowfall Friday through Sunday. The first piece of this system will bring an increasing chance of rain showers to these areas Thursday. Colder air and increasing upslope flow will develop Thursday night and Friday with rain changing over to snow. The Cody foothills will likely see rain change over to snow by sunrise Friday and possibly the Lander foothills. It also appears that other areas such as the Wind River basin and lower elevations of Johnson County will also see rain change over to snow during the day Friday including Riverton and Buffalo. Casper will see a cold rain or rain and snow mixture Friday... possibly changing over to all snow by afternoon. All areas will see snow Friday night and quite possibly through the day Sunday.
Snowfall amounts are still uncertain but the potential for 6 to 12 inches of snow does exist across the lower elevations east of The Divide and in the Upper Green river basin. Locally higher amounts are possible near the mountains around Cody... Buffalo... Casper... Lander and Thermopolis. The East Slope of the Wind River mountains... The Owl creek and Bridger Mountains... the southern end of the Absaroka Mountains... the southern big horns and Casper Mountain may see one to two feet of snow.
Hunters... travellers and others with outdoor interests should pay close attention to the weather forecast over the next couple days. The mild... early Fall weather is about to come to an end with a sudden switch to winter conditions. Listen to NOAA Weather Radio or your favorite media outlet for the latest forecasts and winter statements.