Arctic blast moves in Sunday

SATURDAY: Partial sunshine to begin the day Saturday with highs in the 30's but remaining dry and mostly calm. By the afternoon, conditions will begin to deteriorate. Very light freezing rain/freezing fog is possible into early Sunday morning.
Sunday: Low clouds and areas of freezing fog develop early which will keep our highs in the teens and twenties for highs. This will be a very shallow arctic airmass that will yield overnight lows in the sub-zero range for the Arkansas River Valley Sunday night. Some light snow develops late Sunday and will linger into early next week. So shallow, Woodland Park will be warmer then a majority of the region. Temperatures will be 15-30 degrees below average, stuck in the teens and 20s across the region.