9:30 AM, Sunday, December 30, 2018
After a mild Sunday, Monday will bring very cold weather and some snow. The best chance for accumulation along the Front Range urban corridor will be south of a line from Lyons to Longmont to DIA. Although a big storm is not expected, you should be prepared for some winter driving conditions in the mountains and in the Denver-Boulder area on Monday.
0-1 inch: Fort Collins, Greeley, Longmont
1-3 inches: Cheyenne, northeast Denver & DIA, Colorado Springs
2-4 inches: Boulder, Broomfield, west and south sides of Denver, Castle Rock
3-6 inches foothills and Palmer Divide of Douglas, Jefferson, and Boulder counties
Mild, then very cold, then mild
Mild weather today will be replaced by temperatures on Monday that fail to make it to 20 degrees. It will probably be around zero in Denver-Boulder around the time that the new year arrives. By New Year’s morning temperatures are likely to range from 0 to -10 along the Front Range (coldest in areas that have snow cover). But then by the Thursday-Saturday period dry, unseasonably mild, and occasionally windy weather will be in place.