A rare winter storm is tracking through the northern Rockies this weekend.
Forecasts call for up to 16 inches of whiteout in the mountains of Idaho and Montana.
Extreme chill is forecast, and rain is likely across Wyoming and lower elevations.
Winter Storm Warnings are in effect for higher ground in the region.
In the eastern United States, officials are assessing preparedness measures after earlier winter events, including a recent report on the Nashville storm that found shortcomings and suggested updates.
The active warnings and cold spell have prompted transport alerts and safety steps in the affected states.