Much colder temperatures are expected late tonight into Sunday as Arctic air pushes into Colorado. A Cold Weather Advisory is in effect from 3 AM Friday to 9 AM Sunday for the northeast and east central plains where very cold wind chill temperatures as low as 22 below zero are expected. Additionally, a Winter Weather Advisory is in effect from 11 AM Friday to 5 PM Saturday for the Central Mountains, where snow accumulations between 5 and 11 inches are expected. Hazardous travel conditions are expected to impact the Friday evening commute and Saturday AM ski traffic.