DENVER (AP) — The National Weather Service has issued winter storm warnings for northeastern Colorado, southeastern Wyoming and western Nebraska, saying heavy snow in the region could hamper travel during Thanksgiving week.

The weather service says storms Monday through Tuesday afternoon could bring about 15 inches of snow to Cheyenne, 11 inches of snow to Denver and similar amounts to western Nebraska.

Meteorologist Kyle Fredin said Sunday the Denver area is forecast to see 6 to 8 hours of heavy snowfall starting late Monday that will cause significant travel impacts and possibly temporary road closures.

The agency says there’s a chance travel could become nearly impossible Monday night and Tuesday morning across the Interstate 25 urban corridor in northeastern Colorado and into Wyoming.

United Airlines announced Sunday it would waive the change fee for re-booking flights scheduled to leave Denver International Airport on Tuesday.

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