A slow-moving trough of low pressure is tracking across the Southwest U.S. this weekend, while arctic air has filtered into Eastern Colorado. As a result, the Denver metro area and Front Range urban corridor are experiencing a cold President’s Day Monday with light snow impacting much of the region.
A cold front moved through on Sunday, with upslope winds developing behind the front as snow developed Sunday night.
Moisture has not been significant with this system. Looking at the 700-millibar relative humidity analysis this morning (which corresponds to approximately 10,000 ft.), we can clearly see the low pressure system over the Southwest, but only modest moisture at the mid-levels of the atmosphere (image source: College of DuPage).
However, thanks to the cold air that arrived with this system, snow that fell last night was easily able to accumulate on roadways across the Front Range with impacts to this morning’s commute.
Overnight snow reports were quite variable, favoring areas west of I-25 along the Front Range, from Boulder south to the New Mexico border. Denver snow totals were generally in the 1-2″ range overnight across most of the city, with lower amounts across the eastern metro area and higher amounts across the western metro area near the foothills.
Areas from Western Lakewood to Golden received snowfall amounts of 3-5″ with some isolated amounts up to 6″, while farther north around the City of Boulder, snowfall generally ranged from 2-4″.
Across the Southern Front Range, Colorado Springs snow totals were in the 1-3″ range, while Pueblo and Canon City saw lighter totals in the 0.5-2″ range.
Last night’s snowfall was mostly a miss for the mountains along and west of the Continental Divide, except for the Southern San Juan Mountains where Wolf Creek Ski area picked up 10″ of snow.
The sun has come out late this morning across the Front Range, allowing for some recovery on the roadways per webcams despite temperatures in the low to mid teens (following morning lows in the single digits).
However, the region will remain under the influence of the upper level trough of low pressure with another disturbance expected to arrive tonight with light snow developing across the I-25 corridor overnight, which should once again result in a slick Tuesday morning commute.