A rare winter storm is moving through the northern Rockies this weekend.
Forecasts call for up to 16 inches of snow in the mountains of Idaho and Montana.
Record cold is expected, and rain is likely across Wyoming and lower elevations.
Winter Storm Warnings have been issued for elevated terrain in the region.
In the eastern United States, officials are assessing contingency strategies 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 led to transport alerts and safety steps in the affected states.