Snowstorms rolling through Colorado mountains likely will drop a foot of snow in some areas by Tuesday morning, and state highway crews Sunday night were scrambling to keep traffic flowing on major passes as accidents forced delays.

But the big snow will miss metro Denver, National Weather Service forecasts said.

“This is going to fall in 1-inch to 3-inch increments through Tuesday morning. When it’s done, we’ll be looking at 6 to 12 inches, primarily at elevations higher than 9,000 feet. We might see up to 20 inches in western Jackson County near Rabbit Ears Pass above Steamboat Springs,” NWS meterologist Kyle Fredin said.

“Down in metro Denver, expect winds at 15 to 20 miles per hour in urban corridors, with gusts up to 40 mph and 75 mph in the foothills.” Fredin said.

A few storms may spread toward the city, but little snow will stick, he said. Roads could get wet.

Colorado Avalanche Information Center officials were monitoring rising hazards in the high country.

Colorado Department of Transportation bulletins Sunday evening indicated U.S. 6 (Loveland Pass) had been closed because of avalanche hazards.

Widespread snow and blowing snow will continue over the northern & central mountains tonight. Visibility may be near zero at times. #COwx pic.twitter.com/aZpMdTcDcL — NWS Boulder (@NWSBoulder) November 28, 2016

Sunday evening shortly after sunset, CDOT crews closed eastbound Interstate 70 in Glenwood Canyon because of multiple accidents and were stopping traffic at the Eisenhower Tunnel. Eastbound I-70 along Vail Pass had reopened after delays with the crews staging traffic flows.

CDOT crews were requiring commercial truckers to use chains on mountain roads, including Colorado 9 (Hoosier Pass) and advised passenger vehicles to ensure proper snow tires with chains if necessary.

Snowplows were roaring into action.

State Trooper Tim Sutherland, just down from the mountains Sunday evening, said no fatal accidents had been reported. Troopers urged drivers to use greater caution, especially in maintaining safe distances between vehicles on slick roads.

“Snow’s coming in pretty good from the Continental Divide down to Georgetown. Roads are starting to get slick and snow-packed,” Sutherland said.

“Everybody gets in a hurry to get home. Drivers get up on the car in front of them. If that car in front breaks or loses control on ice? If you’re back, you see what that car’s going to do. It’ll give you time to react.”

Drivers also must stay out of the way, he said, as snowplows and emergency vehicles move through.