Parts of the Denver metro area could receive another 1 to 2 inches of snow Friday evening, as another band of moisture combines with cold air, the National Weather Service said.The heaviest bands of snowfall are expected north and south of the city, with up to 2 inches in less than 30 minutes, forecasters said. Other areas could see a half-inch an hour before the snow tapers off later Friday evening.Highway officials are urging caution from Boulder to Fort Collins and in Douglas County, areas seeing heavy snow showers as of about 7:30 p.m.Traction laws are in effect overnight on Interstate 70 from Morrison to Idaho Springs, requiring vehicles to have four-wheel drive, proper ties or chains, according to the Colorado Department of Transportation.

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