Extreme Cold/Wind Chill in Central Gunnison and Uncompahgre River Basin, Colorado

The KMTJ ASOS in Montrose recorded an approximately 1.5 hour period where temperatures were below 25F and wind chills were below 15F. Winds were below the 10 mph threshold, however the wind chill values produced by even these weak winds were sufficient to warrant inclusion. Temperatures ranged from 10F to 12F and winds ranged from 6 mph to 7 mph. The coldest wind chill value recorded was 0F. No reports of injuries, damages, or fatalities were received.

A cold front ushered in an arctic airmass on the evening of January 17th, as well as bringing widespread wind and snow to eastern Utah and western Colorado. This arctic airmass was reinforced over the course of the next week by several passing waves with their own associated cold fronts. Temperatures during this period were 15-20 degrees below normal, and in some places close to 30 degrees below normal. With temperatures this cold, any amount of wind would produce a dangerously cold wind chill. The coldest period of this event was January 20th to the 22nd, with temperatures finally beginning to moderate after the 23rd.