An Arctic blast is heading towards Denver with wind chills as low as 30 below possible for a 60 hour stretch. It has been an impressive 72 hours across the high country with treacherous travel and significant snow for ski resorts. Some of the top reports so far include Vail Mountain at 35 inches, followed by Copper Mountain with 28 inches.

Temperatures fell below freezing at about 5 p.m. on Sunday and are expected to stay there until around 11 a.m. Friday, putting Denver on track to see nearly 115 hours of frigid temperatures.

Colorado’s northern mountains, including Steamboat Springs and Summit County, may see up to 15 inches of snow by Tuesday morning, according to the National Weather Service.