A ridge of high pressure and not for the weekend, weak storm for Sun/Mon

04/10/25 8:30am: Our weather for the next 3-4 days: Big ridge of high pressure as you can see on the first image below (going to be hot on Sat and Sun). But that will give way to a little storm system that will graze northern CO on Sun afternoon into Mon morning (as you can see on the second image below).

Today is a transition day, warming up nicely by this afternoon (upper 60s for Den/Bou, 40s/50s for mountains). Some wind over the front-range mountains and foothills but not nearly as strong as yesterday (gusts of 20-40 mph in spots, mostly above 7500ft).

Then turning very nice and warm for Fri and Sat across the state with light wind in most areas. Fri looks like very little wind and a nice day to be in the mountains.

Temps will really warm up by Fri afternoon (after a cool start in the morning). By late afternoon temps will be in the low to mid 80s for Den/Bou with 60s/70s in the mountains. Even warmer on Sat with temps in the mid-80s or higher for Den/Bou.

Some wind returns to the front-range mountains on Sat, especially later in the afternoon

Sun will start out nice but then a cold-front with rain/snow showers will move across northern CO on Sun afternoon into Mon. Uncertainty is high in rain/snow amounts: ECMWF shows more, GFS shows much less

For the north-central mountains a chance for some snow / snow-showers and some wind from 3pm Sun to 9am Mon, best chances late Sun night. Trace-4" of snow for some of the ski areas, passes and higher terrain with best chances along/east of the Cont. Divide (Front Range mountains).

It will turn windy across both the mountains and front-range (Den/Bou) on Sun, especially in the afternoon

For Den/Bou and the front-range a chance for some weak rain showers from 3pm-9pm, then a chance for rain/snow mix or all snow from 9pm Sun to 9am Mon (best chances early Mon am). Maybe a Trace-1" of snow for the urban corridor and 1-3" for parts of the foothills. Best chances for snow will be in the Boulder and Larimer county foothills above 8k ft (also a chance on the Palmer Divide as well).

Looking a ways out, I see a much more active weather pattern setting up around April 22nd-25th, more on that later.

First image shows the big ridge of high-pressure expected on Friday via 500mb height anomalies from latest GFS, second image shows the pattern on Mon am (much cooler with a storm grazing CO). Third image shows forecast temps at 3pm Fri from latest HRRR. Fourth image shows forecast total liquid precip from now through 12pm Mon from latest ECMWF, take with big grain of salt as uncerainty for that little storm system is high.