A winter storm warning was issued on Thursday for much of southern Montana.
The National Weather Service reported that some 8 to 14 inches of snow was possible above 7,000 feet, making travel in high country difficult and tree and power line damage possible.
Snowfall rates were expected to peak on Friday, then gradually end on Saturday.
In Idaho, rain or snow was forecast for parts of Fremont, Clark, Teton, Butte, Custer and Caribou counties. At night temperatures in these areas could drop into the 20s or 30s.
In western Wyoming a winter weather advisory was in effect with snow levels lowering to 7,000 feet by late Friday. Snowfall was expected to be heavy at times through Friday night. Between 5 to 8 inches was expected, according to NWS.
Thanks to Vance von Raab for this link