Summit County ski areas are preparing for a significant cold front that is expected to bring snow and colder temperatures. The National Weather Service predicts that the cold front will arrive on Thursday and last through the weekend. Ski areas, including Breckenridge Ski Resort, Keystone Resort, and Copper Mountain Resort, are making snow to take advantage of the expected conditions. The cold front follows a warm spell that saw temperatures rise above freezing, melting some of the snow. The ski areas are optimistic about the upcoming snowfall, as it will help to replenish the snowpack and ensure a good winter season.