The morning commute could be an icy one even though state and municipal snowplows are expected to be out all night in the Denver metro region's biggest snowstorm of the season.

With an overnight wind chill of 0 degrees, ice on bridges and streets is almost certain, weather and highway officials warned Sunday evening.

"Highways and interstates are icy and snow-packed," the Colorado Department of Transportation posted on its Twitter account Sunday night. "Plan extra travel time for the morning commute."

The Sunday storm dropped more than a foot on some parts of the Front Range.

Denver Public Works on Sunday deployed some 120 four-wheel-drive pickup trucks equipped with plows to sweep through 14,000 residential streets in the city, said spokeswoman Ann Williams.

Crews are hoping to plow all those blocks in the next 48 hours, but it may take three days, Williams said. Plows won't scrape down to pavement, but will shave off layers of snow to avoid the deep ruts that formed in 2006.

The residential plows are only deployed between Nov. 15 and March 15 under conditions that include prolonged freezing temperatures.

"We're seeing a lot of icy roads," Williams said. "The pavement is very cold and the snow is bonding to the pavement, so we have a lot of slick conditions. We are trying to stay with it."

A brief warmup should arrive in the city Monday afternoon with mostly sunny skies and a high of 34 degrees, but forecasters expect a low Monday night of just 11 degrees.

Another chance of snow arrives in Denver Tueday. There is a 30 percent chance of another round of snow during the day with a high of 32, and a 20 percent chance Tuesday night as the temperature sinks to about 15, according to the National Weather Service.

The weather could begin to warm up slowly with a forecast high of 34 Wednesday, 37 on Thursday and 41 Friday, 47 on Saturday and 55 on Sunday, according to the outlook.

The high in Denver Sunday was 28 degrees set at 10 a.m. The average temperature for the date is 48 degrees.

Weather was better in the mountains than along the Front Range and across the Eastern Plains Sunday.

Light snowfall fell over much of Western Colorado Sunday with a winter weather advisory expiring at 6 p.m. Snow was expected to end overnight, according to the National Weather Service in Grand Junction.

Staff writer Tom McGhee contributed to this story.

Joey Bunch: 303-954-1174, or