It's literally the perfect storm for Butte, Bozeman, Billings, Baker, and everywhere in between. Heavy snowfall, dangerous winds, and drastically cold temperatures are expected across most of Montana. Don't be surprised if Emergency Travel Only statements are issued.
The National Weather Service here in Billings has reported a Hazardous Weather Outlook for South-central Montana and Northern Wyoming detailing significant amounts of precipitation, including snow in the mountains.