An arctic airmass will bring bitterly cold air to Colorado beginning Saturday and lasting through Monday night,” NWS forecasters said in a Hazardous Weather Alert.

The City of Denver is extending its severe weather shelter activation into next week. Denver's Department of Housing Stability activated its Cold Weather Shelter plan on Dec. 30 and has extended it until at least 11 a.

Dangerously cold in Denver this weekend

Traffic is expected to be impacted along major highways, with northern Colorado towns even more likely to experience bitter cold conditions.

It is January in Denver and the National Western Stock Show is in town, which can only mean one thing ... cold and snowy Colorado weather is around the corner. It is a tradition at this point, and this year will be no different. An arctic blast will bring temperatures 20 to 40 degrees below average and a chance for snow.

Balmy mid-week to bitterly cold this weekend