CHEYENNE, Wyo. (AP) — Another snowstorm is taking aim at northwest Wyoming.

The National Weather Service has issued a winter storm warning for the mountains surrounding Jackson Hole. Up to 20 inches of snow is possible Tuesday through Wednesday.

The heaviest snow is expected Tuesday evening.

Roads in the area are becoming slick.

A winter weather advisory is posted for much of the rest of western Wyoming, including Yellowstone National Park.

Elsewhere in Wyoming, heavy snow is predicted for the Sierra Madre Mountains in the south-central part of the state, and high wind warnings were posted for the central and southeast sections, including Casper.

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