11:30 AM, Monday, February 19, 2018
Expect snowy conditions to continue (and maybe get worse) through this evening from metro Denver northward with very cold weather through Tuesday.
The periods of intermittent light snow should continue through the night. More important is the likelihood for narrow southwest-northeast bands of heavy snow late this afternoon and evening. These bands parallel the jet stream and may only be 10-15 miles wide but a hundred miles long, so conditions can vary greatly over short distances. Most of the best local scale models are predicting a main band stretched from the north and west sides of metro Denver to Weld County. I don’t completely trust the forecast of a specific location, but a period of heavier snow in a small area somewhere from metro Denver northward seems likely.
Total accumulations through Tuesday morning from metro Denver north are likely to be 2-4 inches in most areas, with 4-6 associated with the heavier bands late this afternoon and evening. Colorado Springs will likely be south of the main action.
Many parts of the Front Range urban corridor may not see temperatures rise above 20 until Wednesday. Nights will probably be in the single digits, and if there is partial clearing Tuesday night some of the normally cold spots might slip below 0. Even though it won’t be as cold later this week, we will probably remain a below average with some potential for more cloudy intervals and light snow.