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Heavy snow, 60 mph wind gusts coming to western Wyoming; Tetons may see 30 inches by Thursday afternoon

I-80 near Evanston on Tuesday afternoon. (WYDOT)

CASPER, Wyo. — Areas of western Wyoming are expected to see heavy snow and wind gusts up to 60 mph in a storm that is expected to arrive on Tuesday night, according to the National Weather Service (NWS) in Riverton.

15-25 inches of snow is expected in the Gros Ventre Mountains and the Salt River and Wyoming Ranges between 11 p.m. Tuesday and Thursday afternoon. The Teton Range could see up to 30 inches, according to the NWS in Riverton. Winds in these western mountains could gust as high as 60 mph and travel could become difficult with visibility possibly down to a tenth of a mile at times during the storm.

The Wind River Mountains, including Union Pass, could see 12-18 inches by Thursday afternoon. South Pass can expect 5-10 inches, according to the NWS in Riverton. 60 mph wind gusts are also possible in these areas.

Jackson Hole, Star Valley and the Upper Green River Basin foothills could see 6-12 inches of snow with locally higher amounts up to 15 inches possible, according to the NWS in Riverton. 35-45 mph winds are expected.

Snow is also expected further east in Wyoming starting on Wednesday. Casper has an 80% chance of snow on Wednesday with 2-4 inches possible, according to the NWS in Riverton.

Snow could contribute to dangerous travel along I-25 and I-80, according to the NWS in Cheyenne. The NWS in Cheyenne shared the following forecast information on Tuesday with areas shown in red and orange expected to see over six inches of snow by Thursday morning:

“Bitterly cold temperatures” are expected east of the Continental Divide on Wednesday, according to the NWS in Riverton. Casper could see windchill values drop as low as -20 degrees during the day Wednesday. The temperature could reach a low of -7 degrees on Wednesday night with -20 degree windchill values possible.

Further forecast information is available from the NWS in Riverton.