The Friday forecast update:
Here comes another storm! The big difference with this next storm is that there will be a lot more moisture (some falling as just rain) and much warmer temperatures.
The snow begins today in the mountains, rain begins tonight on the lowlands (it won't be down to the middle 30s along I-25 until the predawn hours Figure 1 update). Rain will change to snow before dawn but will be pretty wet/slushy. We may have a rain/snow mix Saturday morning. With the warmer ground, most snow will accumulate, at first, on grassy surfaces and bridges. The lower elevations should see 0.75-1 inch of water (rain ans snow melt) over the weekend.
The mountains should receive 1-1.5 inches of water. Sunday will see colder temperatures and the snow should stick better. Because of the marginal temperatures Saturday and wet conditions, I'm going to broad-brush snow totals. From Fort Collins to east Denver, expect 0.5-2 inches Saturday and 1-3 on Sunday, ending after midnight Sunday/Monday.
The lower foothills (Castle Rock to Golden to Boulder to west Fort Collins): 1-3 Saturday and 2-4 on Sunday. The higher foothill communities (Nederland to Estes Park to Red Feather Lakes): 1-3 inches Friday night, 2-4 inches Saturday, 2-4 inches Sunday. The forecasters at Weather 5280.com give the I-25 corridor folks 3-7 inches (I'm guessing more Saturday afternoon to late Sunday night when colder air arrives).
Another, briefly very cold (Thursday), snowstorm hits Wednesday/Thursday with 1-3 inches in the lowlands, 2-5 inches for the mountains. (Figure 1 update.)

