Monday morning update:
I know everyone wants to know snowfall totals, but the big story with this system is the prolonged cold. Let's talk about the snow though - from Longmont to Broomfield we should see about 1-2 inches a day Monday to Wednesday. Areas east of I-25 will see very little show while the foothills will see 9-12 inches over the week according to the 'fluffier' 15:1 snowfall ratio map from the GFS (Figure 1 update).
The forecasters at weather5280.com (Figure 2 update) don't go that high, but give the Longmont-Broomfield region 2-4 inches. The roads along I-25 shouldn't get bad, often, since there will be just a little snow each day, and it will be very 'dry' due to the low temperatures.
The cold front should sweep down the state between noon and 2 p.m. (dashed line Figure 3 update). We won't get back to freezing until Saturday midday next weekend. I expect single-digit highs Tuesday and 2-3 nights below zero lows Tue/Wed/Thur. With a stiff breeze at times, wind chills will be very painful and dangerous. As I write, we do not have any weather statements, watches, or warnings along I-25 or even up in Estes Park. Still - stay warm!
