A storm dropped more than a foot of snow on parts of the Colorado mountains Monday and left some roads in Denver and Colorado Springs glazed with ice for the morning commute.

The Western Slope, meanwhile, continued its dry stretch, with Aspen Mountain and Sunlight Mountain getting only an inch of new snow.

Eldora Mountain Resort near Boulder reported 15 inches of new snow. Breckenridge and Winter Park ski areas reported 7 inches.

The National Weather Service said 13 inches fell near St. Marys Glacier in Gilpin County in the mountains west of Denver.

Forecasters predicted occasional heavy snow through the afternoon, but the storm was expected to ease up in some areas.

The Weather Service issued a winter storm warning for the Colorado mountains from the northern to southern border. Much of the rest of central and western Colorado was under a weather advisory.

Forecasters said 4 to 8 inches of snow was forecast for the northern and central Mountains.

Officials warned of heavy snow and slow traffic along Interstate 70 through the mountains.

The Colorado Avalanche Information Center said the snowfall coupled with wind would increase the danger of snow slides, but there were no immediate reports of problems.

The Denver airport reported that about 60 flights were canceled Monday because of the storm, out of about 1,500 scheduled to arrive or depart.

The statewide snowpack, which accounts for much of Colorado’s water, stood at 81 percent of the 30-year average before the storm hit.

Snow depth in the South Platte, Arkansas and Colorado river basins ranged from 91 to 102 percent of average, while the southwest corner of the state remained locked in a drought, with snowpack at 60 percent to 75 percent of average.

The northwest corner of the state had about 85 percent of average snowpack.