05/04/26 8pm: Great to see the radar filling with numerous rain showers developing across northern CO as the first cold-front has already moved down the front-range, with much colder air waiting in the wings for tomorrow night.

Forecast remains on track and models are pretty consistent with just some small variations from run to run. I included some of the very latest high-res model runs below for forecast total snowfall through Wed night.

Some things I'm seeing.

Overall, the biggest impacts from this storm system, with heaviest snowfall will be from 9pm Tue through 12pm Wed, so it will take time for things to really get going (so I don't want to hear it was a bust tomorrow morning lol, we won't know rain/snow totals until Thu am).

Overnight into tomorrow morning the focus for heaviest rain/snow will be over northern CO: Ft. Colins/Loveland to Cameron Pass areas.

Still looks like areas from Boulder north through Longmont, Loveland Ft. Collins will be favored for heaviest amounts locally (1.50-2.50" of liquid).

Heaviest snow expected in the northern front-range foothills and mountains above 7k ft (1-2ft, locally up to 3ft for upper parts of Boulder and Larimer counties). Southern foothills: 8-14".

For Den/Bou a rain/snow mix will develop tomorrow morning, but really get going after 12pm Tue. Then all snow likely from about 6pm Tue through 12pm Wed. If snow changes over earlier, could lead to more accumulation. But with the highest rates coming overnight should be a good event (peaking early Wed am), still looks like generally 3-8" for the urban corridor favoring western and southern suburbs areas closer to Boulder and Golden.

Still some question about how much accumulation right in downtown Denver (with warm surface temps, but given its coming at night, I'm thinking should accumulate). For areas above 5500ft, should be no problem getting good snow from this one.

If the high-end pans out, could be dealing with some broken tree branches / limbs, especially in the foothills.

All of the north-central mountains / front-range mountains and foothills are under a Winter Storm Warning from 12pm Tue to 3pm Wed: 6-18" of new snow favoring front-range mountains along/east of the Cont. Divide (Winter Park, Berthoud/Jones Passes, IPW, RMNP, Cameron Pass, Peak to Peak Hwy, I-70 foothills: Idaho Springs to Georgetown will be favored).

Den/Bou/Ft.Collins and the front-range urban corridor (5k-6k ft) is under a Winter Storm Watch from 8pm Tue to 3pm Wed: 3-10" of new snow favoring areas closer to Ft. Collins.

Parts of the northeast plains from Greeley to Limon are under a Winter Weather Advisory from 8pm Tue to 12pm Wed: 2-6" of new snow.

In terms of wind: it will be turning windy over parts of the north-central mountains tomorrow: 10am-10pm: westerly wind-gusts of 30-50mph (in response to the cold-front on the front-range).

I'm sticking with my snowfall map from this morning for now, I'll attach that in the comments.

This is going to be fun!

First image is current composite radar over the state. Second image shows the current winter weather watches and warnings from NWS. Images 3 and 4 compare forecast total snowfall from now through either 6pm Wed or 6am Thu from very latest HRRR and RRFS models, take amounts with grain of salt.