DENVER  The worst of the Arctic airmass that has plunged Denver and the Front Range into days of crushing cold temperatures is upon us. Look for frigid temperatures and dangerously cold wind chills overnight into early Tuesday.An extreme cold warning is in effect for Colorado's mountains, southern Colorado and the far eastern plains until 11am Tuesday. Wind chill values will be as low as -35 to -50 degrees overnight. A cold weather advisory remains in effect as wind chills could reach -25 degrees around the Denver metro area and along I-76. Clear skies, a fresh snowpack, and light winds this evening will allow temperatures to free fall. The usual cold spots like Greeley and Limon could reach -16 F tonight. The Denver metro may see temperatures reach -10 F this evening before dangerous winds develop, the National Weather Service forecast discussion read.However, by Tuesday morning, that cold airmass that has parked itself over much of the state for the last couple of days will start to move out, thanks to high pressure over the Great Basin and low pressure over the Central Plains.It will be chilly in the morning, but temperatures will rise by sunrise. Expected highs will reach the mid- to upper 30s across most of the Front Range. Due to downslope winds, some areas near the base of the foothills may see temperatures in the lower 40s.The National Weather Service said strong winds are expected on the east slopes of the Front Range Mountains and Foothills, with gusts up to 50 mph possible on Tuesday and Tuesday night.Another round of light snow is possible on Wednesday evening, and temperatures will dip back into the 30s. Friday will likely be the warmest day of the week with highs in the upper 40s before another round of snow hits Colorado this coming weekend. Arctic air, brutal wind chills overnight across Colorado, 'milder' temps TuesdayDENVER WEATHER LINKS: Hourly forecast | Radars | Traffic | Weather Page | 24/7 Weather Stream Click here to watch the Denver7 live weather stream.