Periods of moderate to heavy snowfall developed in the mountains, heaviest north of the I-70 Corridor where storm totals ranged from 8 to 24 inches.  Snow and blowing snow reduced the visibilities to zero across much of the Interstate 76 and Interstate 70 corridors east of Denver.  Strongest winds gusting from 45 to 65 mph across the plains extended northeast of line from Fort Collins to Limon.  The snow and blowing snow caused widespread blizzard conditions.  Storm totals ranged from 2 to 10 inches, and produced whiteout conditions and snow drifts from 5 to 10 feet in deep.
Nearly every road across northeast Colorado was closed or shutdown including the I-76 and I-70 corridors east of Denver to the state-line.  Dozens of school closures were also implemented.  Blowing and drifting snow stranded motorists, with dozens of rescues reported.  At Denver International Airport, 116 flights were cancelled and  approximately 800 flights delayed.  After the snow ended, strong winds and areas of blowing and drifting snow continued through the remainder of the week, which forced some extended road closures.

Winter Storm in WEST JACKSON & WEST GRAND COUNTIES ABOVE 9000 FEET, COLORADO
From 12-DEC-22 21:00:00 to 15-DEC-22 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included 18 inches near Rabbit Ears Pass, with 9 inches near Mount Zirkel.

Winter Storm in S & E JACKSON / LARIMER / N & NE GRAND / NW BOULDER COUNTIES ABOVE 9000 FEET, COLORADO
From 12-DEC-22 21:00:00 to 15-DEC-22 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  24 inches near Cameron Pass, 19.5 inches, 9 miles south-southeast of Gould; 16.5 inches near Arapahoe Peak and Glendevey, and 12 inches, 9 miles south-southeast of Spicer.

Winter Weather in S & SE GRAND / W CENTRAL & SW BOULDER / GILPIN / CLEAR CREEK / SUMMIT / N & W PARK COUNTIES ABOVE 9000 FEET, COLORADO
From 12-DEC-22 00:00:00 to 15-DEC-22 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  15 inches near Mt. Audubon, 12 inches, 5 miles west of Green Mountain Reservoir; 10.5 inches, 5 miles west-southwest of Grand Lake; 7.5 inches near Berthoud Pass and Climax, with 6 inches near Loveland Pass.

Blizzard in NE WELD COUNTY, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Blizzard conditions with whiteout conditions, with peak gusts from 45 to 50 mph.

Blizzard in MORGAN COUNTY, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Whiteout conditions with blowing and drifting snow.  Impassable roads with peak gusts to 55 mph.

Blizzard in C & E ADAMS & ARAPAHOE COUNTIES, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Whiteout conditions with blowing and drifting snow.  Peak gusts of 45 to 50 mph, with storm totals of 2 to 5 inches.

Blizzard in N & NE ELBERT COUNTY BELOW 6000 FEET / N LINCOLN COUNTY, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Whiteout conditions with blowing and drifting snow.  Peak gusts of 50 to 65 mph, with storm totals of 2 to 5 inches.

Blizzard in LOGAN COUNTY, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Whiteout conditions with blowing and drifting snow. Peak gusts of 45 to 55 mph, with storm totals of 5 to 10 inches.

Blizzard in WASHINGTON COUNTY, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Whiteout conditions with impassable roadways due from blowing and drifting snow.  Peak wind gusts up to 62 mph, with storm totals of 4 to 12 inches.

Blizzard in SEDGWICK COUNTY, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Whiteout conditions with blowing and drifting snow.  Peak gusts of 45 to 50 mph, with storm totals of 2 to 5 inches.

Blizzard in PHILLIPS COUNTY, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Whiteout conditions with blowing and drifting snow.  Peak gusts up to 56 mph, with storm totals of 2 to 5 inches.

Winter Weather in NE WELD COUNTY, COLORADO
From 13-DEC-22 19:00:00 to 17-DEC-22 17:00:00 (MST-7)
Reported by: Social Media

Gusty winds produced areas of blowing and drifting snow through the rest of the week.  As a result, some roadways remained closed.

Winter Weather in MORGAN COUNTY, COLORADO
From 13-DEC-22 19:00:00 to 17-DEC-22 17:00:00 (MST-7)
Reported by: Social Media

Gusty winds produced areas of blowing and drifting snow through the rest of the week.  As a result, several roadways remained closed.

Winter Weather in C & E ADAMS & ARAPAHOE COUNTIES, COLORADO
From 13-DEC-22 19:00:00 to 17-DEC-22 17:00:00 (MST-7)
Reported by: Social Media

Gusty winds produced areas of blowing and drifting snow through the rest of the week.  As a result, some roadways remained closed.

Winter Weather in N & NE ELBERT COUNTY BELOW 6000 FEET / N LINCOLN COUNTY, COLORADO
From 13-DEC-22 19:00:00 to 17-DEC-22 17:00:00 (MST-7)
Reported by: Social Media

Gusty winds produced areas of blowing and drifting snow through the rest of the week.  As a result, several roadways remained closed.

Winter Weather in LOGAN COUNTY, COLORADO
From 13-DEC-22 19:00:00 to 17-DEC-22 17:00:00 (MST-7)
Reported by: Social Media

Gusty winds produced areas of blowing and drifting snow through the rest of the week.  As a result, several roadways remained closed.

Winter Weather in WASHINGTON COUNTY, COLORADO
From 13-DEC-22 19:00:00 to 17-DEC-22 17:00:00 (MST-7)
Reported by: Social Media

Gusty winds produced areas of blowing and drifting snow through the rest of the week.  As a result, several roadways remained closed.

Winter Weather in SEDGWICK COUNTY, COLORADO
From 13-DEC-22 19:00:00 to 17-DEC-22 17:00:00 (MST-7)
Reported by: Social Media

Gusty winds produced areas of blowing and drifting snow through the rest of the week.  As a result, several roadways remained closed.

Winter Weather in PHILLIPS COUNTY, COLORADO
From 13-DEC-22 19:00:00 to 17-DEC-22 17:00:00 (MST-7)
Reported by: Social Media

Gusty winds produced areas of blowing and drifting snow through the rest of the week.  As a result, several roadways remained closed.

Blizzard in MORGAN COUNTY, COLORADO
From 13-DEC-22 00:00:00 to 13-DEC-22 19:00:00 (MST-7)
Reported by: Trained Spotter

Whiteout conditions with blowing and drifting snow.  Impassable roads with peak gusts to 55 mph.