Colorado Department of Transportation officials said plunging temperatures and heavy, wet snow have created icy conditions and forced several closures along Interstate 70 west of Denver on Sunday afternoon. Multiple accidents were reported on the mountain corridor, frustrating skiers and snowboarders eager to get a few more runs in before the season ends.
In southern Wyoming, the storm forced transportation officials to close a 150-mile stretch of Interstate 80 from Cheyenne to Rawlins on Sunday morning.
The weather service said mountainous areas in Wyoming could get a foot or more of snow, and 5 to 10 inches are forecast for Cheyenne and Laramie.
The storm is a product of a low-pressure system moving east colliding with a cold air mass from the north. It's expected to deliver rain in the northern plains once it leaves Colorado.
Spring-like weather was expected to return to the Rockies by Tuesday, with mostly sunny skies and temperatures in the mid-50s in Denver, the high 40s in Cheyenne and the low 40s in Laramie.