12:55 PM MST, Saturday, January 30, 2016
At noon Saturday the cold front whipped through Cheyenne and quickly took 20 degrees off the temperature. That front will sweep down the Front Range Saturday afternoon and end our mild spell. Some east-west bands of snow Saturday evening will result in variable snowfall, depending on whether one of those bands forms over your area. Accumulation should range from nearly nothing to around 3 inches where there are bursts of heavy snow. So be prepared for brief winter travel on the roads this evening.
Sunday night through Tuesday morning:
The main storm system will result in deep easterly and northeasterly “upslope” winds and widespread snow. Although the heaviest snow is likely to stay south of Denver, the storm should produce enough snow throughout the Denver-Boulder-Fort Collins region to have significant impacts on ground and air travel Monday. The most intense part of the storm is likely Monday afternoon and evening, but you should be prepared for impacts by daybreak Monday, and possibly lingering into Tuesday morning.
Most likely accumulation ranges beginning Sunday night:
Foothills in the counties of Boulder, Jefferson, Gilpin, Douglas, El Paso, and Teller: 12-18 inches, locally 2 feet near Pikes Peak and the Palmer Divide.
Denver (south and west sides), Castle Rock, Broomfield, Boulder: 8-14 inches
East side of Denver, Longmont, Lyons, Fort Collins: 6-10 inches
Weld County, east side of Fort Collins, Cheyenne: 4-8 inches, watch for blowing snow.