05/18/26 8am: Happy to see the rain and cold upslope along the front-range this morning, I just wish it would have held off until after our Red Rock's concert last night lol (was a very cold and wet the last 2 hours after 9pm, more on that in the group later). But great to see some meaningful rain already and some snow in the mountains and the main event is just getting underway now.

At my house in Westminster, I measured 0.36" of rain so far this morning with a current temperature of 40 degs.

Looking at rain reports, areas near Ft. Collins, Loveland and parts of Larimer county have already picked up 0.70" to 1.30" of rain (and snow in the foothills). For the rest of Den/Bou more like 0.25" to 0.50" in spots already.

Here are some notable top rain reports so far from CoCoRaHS (not even close to final totals):

Vona 6.5 SSW 1.35

La Porte 10.0 NNW 1.28

Horsetooth Mountain 3.2 NNW 1.27

Jamestown 2.5 SSE 1.07

Loveland 2.4 NW 0.99

Bellvue 0.7 W 0.90

Loveland 2.4 NW 0.89

Livermore 11.1 W 0.88

Dinosaur 19.0 ENE 0.83

Nederland 3.7 ENE 0.82

Wellington 3.7 WNW 0.81

Limon 0.7 W 0.81

Fort Collins 2.3 S 0.77

Walden 0.2 S 0.76

Estes Park 10.5 SE 0.75

Boulder 7.4 NNW 0.74

Evergreen 2.7 SSW 0.73

Longmont 3.3 SW 0.72

Pinecliffe 2.5 WNW 0.70

Lakewood 1.5 WSW 0.50

Denver 1.3 NE 0.49

Broomfield 1.0 NE 0.37

Littleton 5.0 ESE 0.36

Here are some notable town snow reports from CoCoRaHS:

Livermore 20.3 NW 3.4

Allenspark 2.3 N 1.6

Nederland 0.4 WNW 1.5

Pinecliffe 2.5 WNW 1.5

Virginia Dale 7.2 SSW 1.2

Dumont 2.0 WNW 0.9

Walden 0.2 S 0.5

Estes Park 1.8 S 0.2

Floyd Hill 3.7 N 0.1

And also some good snowfall for parts of the north-central mountains, here are some snow reports from the ski areas (from webcams) and from SNOTEL via CAIC:

Loveland: 3"

A-Basin: 3"

Berthoud Pass summit snotel: 3"

Cameron Pass snotel: 2.8"

Winter Park: 1"

Trapper Lake snotel: 1"

As I mentioned, this is really just the beginning of the main event. You can see the upslope rain developing more along the front-range now with more rain/snow moving into western CO as well.

Looping the high-res models, most of the heavier rain/snow for the front-range and foothills will be from 10am-10pm today with and additional 0.50"-1.0" of rain for lower elevations below 6k ft and additional 2-8"+ for the foothills and front-range mountains above 7k ft.

Den/Bou still may have some snow mix with the snow or all snow flying this afternoon as the colder air comes in, best window would be 3pm-9pm. Little to no accumulation for lower elevations. But as I mentioned some moderate snow stil coming for the foothills.

I'll have more on those details soon.

How are conditions in your neck of the woods this morning? How much rain? How much snow?

First image shows 24hr observed rainfall so far from MRMS. Second image shows current view of the Loveland snow-stake. Third image is current composite radar over the state. Fourth image loops is local radar/surface loop showing the stronger upslope and rain developing now.