12:45 PM MDT, Monday, October 28, 2019
After a short lull in activity, and maybe some breaks in the overcast this afternoon and tonight, snow is likely to redevelop Tuesday morning from north to south behind another cold front. It may be midday before snow develops south of metro Denver. Snow will likely continue into Wednesday morning and then end from north to south.
This next storm is stronger and better organized than the one we just had, but it is working with less moisture. So although the potential exists for a greater snowfall, the limited moisture may result in a similar amount to what we just had, but no freezing drizzle this time. It does appear that mountain areas (which did not get as much as expected in this last storm) might get a little more with this next one. It also appears that significant snow will spread more onto the high plains of eastern Colorado this time around. Although the winds won’t be as strong as we get in our bigger blizzards, there is likely to be enough wind for some blowing snow and dangerous wind chills, especially east of I-25.
Most likely snow accumulation Tuesday-Wednesday morning
7-12″ Rocky Mountain Park, Nederland, Evergreen, Eisenhower Tunnel
5-10″ Denver-Boulder metro and Cheyenne
3-6″ Fort Collins, Longmont, Colorado Springs
Because it may be cloudy on Wednesday morning, the reduces the chance for a record low (7 in Denver from 1991, 6 in Boulder from 1993). On Thursday morning there is a better chance for clear skies that could allow record lows (10 in Denver from 1991, 5 in Boulder from 1991). The high temperatures in Boulder on Tuesday and Wednesday could be the coldest highs for those dates (record low highs are 26 and 23 both set in 1991). The record low high temperatures in Denver are 25 (Tuesday) and 18 (Wednesday).
The snowfall and record cold should be well over by Halloween evening. But expect snow and the ground and temperatures quickly dropping well below freezing at sunset.