CHEYENNE, Wyo. (AP) — Heavy snow is making for difficult travel in parts of northeast Wyoming.

A 100-mile stretch of Interstate 90 from Gillette to Sheridan and a 40-mile stretch of I-25 between Kaycee and Buffalo was closed Tuesday morning because of poor road conditions.

The National Weather Service posted a winter storm warning Tuesday for the Buffalo area where 6 to 10 inches of snow was possible. A winter storm warning was also posted for the Sundance along the South Dakota border.

Elsewhere, winter weather advisories were posted for many mountain areas in much of northeast and western Wyoming.