The first significant snowfall of the season finally made its mark, impacting the mountains, high valleys, foothills, and much of the plains with much needed moisture.  In the mountains and foothills, storm totals ranged from 8 to 18 inches.  In the high mountain valleys of Grand, Jackson, and Summit counties anywhere from 6 to 12 inches was observed.  Elsewhere 5 to 10 inches of snow fell west of I-25, 3 to 7 inches east of I-25, with 2 to 5 inches over the far eastern plains.

Winter Storm in GRAND & SUMMIT COUNTIES BELOW 9000 FEET, COLORADO
From 30-DEC-21 23:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals ranged from 5 to 12.5 inches of snowfall, heaviest in Summit County.

Winter Storm in BOULDER & JEFFERSON COUNTIES BELOW 6000 FEET / W BROOMFIELD COUNTY, COLORADO
From 31-DEC-21 05:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals ranged from 6 to 10 inches, including the western Denver suburbs extending north into Broomfield, Boulder and Longmont.

Winter Storm in LARIMER COUNTY BELOW 6000 FEET / NW WELD COUNTY, COLORADO
From 31-DEC-21 05:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals ranged from 5 to 8 inches in the Fort Collins, Loveland and Wellington.

Winter Storm in LARIMER & BOULDER COUNTIES BETWEEN 6000 & 9000 FEET, COLORADO
From 31-DEC-21 05:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals ranged from 6 to 11.5 inches, with the heaviest amounts in the foothills of Boulder and southern Larimer counties.

Winter Storm in JEFFERSON & W DOUGLAS COUNTIES ABOVE 6000 FEET / GILPIN / CLEAR CREEK / NE PARK COUNTIES BELOW 9000 FEET, COLORADO
From 31-DEC-21 05:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals ranged from 6 to 15 inches of snowfall, with the heaviest amounts in northwest Jefferson and Clear Creek counties.

Winter Weather in ELBERT / C & E DOUGLAS COUNTIES ABOVE 6000 FEET, COLORADO
From 31-DEC-21 11:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals ranged from 4 to 7 inches of snowfall.

Winter Weather in N DOUGLAS COUNTY BELOW 6000 FEET / DENVER / W ADAMS & ARAPAHOE COUNTIES / E BROOMFIELD COUNTY, COLORADO
From 31-DEC-21 11:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals around Denver ranged from 4 to 6 inches of snowfall.  The official snowfall measurement at Denver International Airport was 4.5 inches.

Winter Weather in C & S WELD COUNTY, COLORADO
From 31-DEC-21 11:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals ranged from 2.5 to 7.5 inches of snowfall.

Winter Storm in WEST JACKSON & WEST GRAND COUNTIES ABOVE 9000 FEET, COLORADO
From 30-DEC-21 05:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  15.6 inches near Mount Zirkel, 13 inches, 9 miles south-southeast of Gould and 11 inches near Gould.

Winter Storm in S & E JACKSON / LARIMER / N & NE GRAND / NW BOULDER COUNTIES ABOVE 9000 FEET, COLORADO
From 30-DEC-21 05:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  15.6 inches near Bear Lake and Trail Ridge, 13 inches, 7 miles north-northwest of Kinikinik, with 11.7 inches near Cameron Pass.

Winter Storm in S & SE GRAND / W CENTRAL & SW BOULDER / GILPIN / CLEAR CREEK / SUMMIT / N & W PARK COUNTIES ABOVE 9000 FEET, COLORADO
From 30-DEC-21 05:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  18 inches near Green Mountain Reservoir, 14.3 inches near Mount Audubon, 9 inches near Winter Park, 8 inches near Berthoud Pass.

Winter Weather in JACKSON COUNTY BELOW 9000 FEET, COLORADO
From 30-DEC-21 23:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Walden picked up 7.1 inches of snowfall.

Winter Weather in C & E ADAMS & ARAPAHOE COUNTIES, COLORADO
From 31-DEC-21 11:00:00 to 31-DEC-21 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals ranged from 3.5 to 5.5 inches of snowfall.