Freezing temps this morning, snow reports from yesterday a look at next storm system for Thu/Fri

10/21/25 8:30am: Another chilly morning out there as expected with low temps of 25-34 for Den/Bou and the front-range and low temps of 12-28 in the mountains (first image shows low temps (min-T) since midnight).

Here are some notable low temps (some of these are not official stations):

Fraser: 10
Berthoud Pass: 12
Kremmling: 14
Gunnison: 15
Meeker: 19
Silverthorne: 20
Vail: 22
Greeley: 25
Alamosa: 25
Longmont: 26
Denver (DIA): 27
Boulder: 30
Westminster (my house): 31

Second image is latest surface map showing current temps, dewpt, wind-speed an precip

Third image shows 48hr observed snowfall from NOHRSC (interpolated to it can be off / too low in spots).

From CoCoRaHS reports, here are some notable town snow-total from yesterday's quick hitting snow storm:

Silverthorne 2.8 SSW: 3.0
Yampa 5.1 S: 2.0
Kremmling 9.1 WNW: 1.5
Nederland 0.4 WNW: 1.0
Nederland 3.7 ENE: 0.7
Walden 0.2 S: 0.7
Oak Creek 5.5 E: 0.7
Vail 0.9 WNW: 0.4
Pinecliffe 2.0 ESE: 0.3
Nederland 2.8 NE: 0.3
Rollinsville 1.1 SSW: 0.2

That is all for now. We will have a break in the weather through tomorrow night.

If you missed my forecast update from last night for the next storm system here you go

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From 10/20:

Models show a sneaky little upper-level low moving from southern CA into CO on Thu. This is a warmer storm system overall with some Pacific moisture, but snow-levels will likely fall to 8k ft in the central mountains by Thu night into Fri am.

Rain/snow moves back into southern CO / San Juans late Wed night into Thu (after 3am), with rain and snow down there through late Thu pm (some snow above 9k ft).

Rain/snow moves into the north-central mountains (Eagle, Summit, Grand co. etc) mostly after 12pm Thu with the bulk of the precip expected from 6pm Thu to 6am Fri. As I mentioned snow-level will likley fall to valley floors (8k ft) by Fri am. But looks like 2-6" for some of the ski areas / higher terrain, favoring areas from Breck south. There is still high uncertainty in the details as some of the models show quite a bit more precip / snow near Summit Co, so we shall see.

For Den/Bou and the front-range it doesn't look like a big precip producer but some rain (and snow above 9k ft) from 6pm Thu to 6am Fri. Cooler and cloudier on Fri with temps in the 50s.

The storm clears out by Fri afternoon.

Then tracking potentially a more significant winter-storm for the Sun-Tue time-frame (mostly for the mountains), but models are all over the place with storm track, cold air and snowfall. Some models like GFS show a bigger storm Sun night through Mon night and other models like ECMWF show the bulk of it Mon night to Wed am, so uncertainty is high.

Fourth image shows Thu storm system from ECMWF