Wintry weather will return to those in the northern Rocky Mountains following a warm spell in the West. A storm system heading through the region will usher cold air back in behind its cold front as it sweeps southward.

Snow through Friday will accumulate over an area from the mountains of Idaho through northwestern Wyoming and a large part of Montana. The heaviest snow will pile up 3 to 6 inches in the mountains of western Montana, eastern Idaho and northwestern Wyoming. As much as a foot of snow is possible in the highest elevations.

Story by AccuWeather.com Meteorologist Katie Storbeck.