Arctic air will cover the plains through Sunday, with readings dipping to single digits in most areas by Friday morning, and likely below zero in most spots by Saturday morning. With breezy winds across the eastern plains, wind chill readings could be as low as -20F, which means frostbite would be possible in less than 30 minutes. Dress warmly in several layers of clothing, including a hat and mittens, and avoid prolonged outdoor exposure. In addition, areas of light snow will develop across the plains through Friday, and become more widespread Friday night, before ending north to south Saturday. Mainly light snow accumulations can be anticipated, but it will still lead to slick travel conditions. Mountain areas will see more snowfall, with 4-12 inches expected in the I-70 Mountain Corridor and much of Summit County.