December #temperatures were much above average throughout the region. Much of the region saw 9 to 12°F above average temperatures, with a large pocket of 12 to 15°F above average temperatures in western Wyoming, northern Utah, and northwestern Colorado. Pockets of 15°F or more above average temperatures occurred in three areas: one in Fremont and Natrona Counties in western Wyoming, another from southwestern Wyoming to northeastern Utah, and the last in Moffat County in northwestern Colorado. The entire region experienced much above average (top 10%) to record-warm temperatures in December. For weather monitoring sites with at least 50 years of data, 50 of 60 sites in Utah had a record-warm December, 31 of 75 sites had records in Colorado, and 34 of 46 sites had records in Wyoming. All SNOTEL sites except 1 had record-warm Decembers in Utah, all SNOTEL sites but 3 had records in Wyoming, and all SNOTEL sites but 16 had records in Colorado. These records vary from a few years to 47 year...