3:15 PM MST, Monday, November 30, 2020
Today (Monday) was the mild day of the week. A cold front tonight will make Tuesday at least 10-15 degrees colder, and another cold front by Wednesday morning will make it even colder. Daytime temperatures on Wednesday are likely to remain below freezing even in the urban corridor. The good news is that the cold air may start to moderate by the end of the week, and the initial outlook is that the weekend won’t be so bad for December.
Snow? Both cold fronts this week are associated with upper level storms, but we are in a dry air mass. The result will probably be some scattered areas of mainly light snow or flurries Tuesday and/or Wednesday. The best chance for accumulation is in the mountains where several inches are likely. For the lower elevations of the Front Range we will likely see a trace to a couple inches by Wednesday, with accumulation more likely in the south and west sides of metro Denver than to the north and east.
11 AM MST, Wednesday, November 25, 2020
Except for a small chance of some spotty light snow Thanksgiving evening, the 4-day weekend should be dry and cool. A weak storm moving through on Thanksgiving may produce a few patches of light snow in the early evening, but most of the Front Range region will have little or no accumulation. Where it does accumulate, it will likely be less than an inch.
Saturday will probably be the only day of the weekend with afternoon temperatures a little bit above average. The other days will likely be a little below average (staying below 50 in the urban corridor). So overall, there is not too much to report for the long weekend’s weather.
11:15 AM MST, Sunday, November 22, 2020
Today through Tuesday
A relatively fast moving but organized storm system is likely to bring some light to moderate snow accumulation Monday night and early Tuesday, mainly in the Denver-Boulder metro area south to the Palmer Divide region.
First we will see a warm-up on Monday with afternoon temperatures in the lower elevations reaching the 50s to around 60. As the storm first begins to impact the Front Range region Monday night, there is a good chance it will be rain below 6000 feet, but snow at all elevations by morning. Snow is likely to end during the day Tuesday.
For areas north of a DIA-to-Lyons line the accumulations are probably going to be very minor if any (trace to 1 inch).
South of the DIA-to-Lyons line (including Boulder, Broomfield, Lakewood, Denver, Castle Rock) there is likely to be 1-3 inches, and because the storm’s organization is increasing with time, I think there is about a 1-in-3 chance for 3-6 inches. South of the Palmer Divide in Colorado Springs the chance for 3-6 inches is less.
Above 6000 feet a 6-inch storm appears likely, especially in Boulder, Jefferson, and Douglas counties.
After a seasonably cool and dry Wednesday and Thanksgiving Day, the next chance for snow (probably light amounts) will probably occur sometime between Thanksgiving evening and early Friday. Dry weather is likely to be with us for the remainder of the long weekend.
6 AM MST, Friday, November 13, 2020
A Pacific cold front on Saturday is likely to bring some very strong west and northwest winds to the Front Range region, along with some snow near and west of the continental divide.
Today should be the mild day of the next three days. Snow is likely at the high passes tonight and Saturday (maybe 3-6 inches). Some brief rain or snow showers may move east over the lower foothills and plains on Saturday, but the weather east of the continental divide should be mainly dry.
The strong winds (gusts over 60 mph) could be affecting some local areas in the higher elevations and near the foothills by Saturday morning. The chance for high winds will probably increase and spread out onto the plains by Saturday night. I would not be surprised to see some local reports of 75 mph winds.
Temperatures should be seasonable to a little below average Saturday afternoon and Sunday. But it looks like an unseasonably warm period will begin Monday afternoon and continue through much of next week.
Noon, Friday, November 6, 2020
Our unseasonably warm weather is forecast to be replaced by colder, but not bitter cold weather, Sunday and early next week. No major precipitation episodes are expected, but some mountain snow/valley rain is likely in mountain areas Sunday, and on Monday the chance for some snow exists for the Front Range region (including the urban corridor).
A Pacific cold front on Sunday will start the cooling trend. Although most precipitation with it will be in mountain areas and west of the continental divide, there may be a brief period with showery precipitation (mainly rain) and gusty winds along the Front Range early Sunday. Monday should be colder still, with some areas of low clouds and mainly light snow for parts of the Front Range region.