A unusual winter storm is sweeping through the northern Rockies this weekend.
Forecasts project up to 16 inches of whiteout in the mountains of Idaho and Montana.
Record cold is expected, and wet conditions are possible across Wyoming and lower elevations.
Winter Storm Warnings remain active for higher ground in the region.
In the eastern United States, officials are reviewing contingency strategies after earlier winter events, including a recent report on the Nashville storm that spotted issues and advised revisions.
The active warnings and cold spell have triggered travel cautions and preparation measures in the affected states.