An initial shortwave trough and then a larger open wave moved across western Colorado. Strong upper level support, impressive moisture, widescale synoptic lift, and a strong surface cold front resulted in widespread precipitation with moderate to heavy snow accumulating in most mountain areas as well as some valley locations. Winds gusted to 55 mph in the higher elevations and exceeded 30 mph in the valleys.

Heavy Snow in GRAND AND BATTLEMENT MESAS, COLORADO
From 08-DEC-21 22:00:00 to 10-DEC-21 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 10 to 14 inches of snow fell across the area.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 09-DEC-21 07:00:00 to 10-DEC-21 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 8 to 16 inches of snow fell across the area.

Heavy Snow in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 08-DEC-21 17:00:00 to 10-DEC-21 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Generally 10 to 20 inches of snow fell across the area with locally higher amounts of 30 inches.

Heavy Snow in FLATTOP MOUNTAINS, COLORADO
From 08-DEC-21 18:00:00 to 10-DEC-21 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Generally 12 to 20 inches of snow fell across the area.

Winter Weather in UPPER GUNNISON RIVER VALLEY, COLORADO
From 09-DEC-21 15:00:00 to 10-DEC-21 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Travel was impacted over Cerro Summit with slick, snowpacked roads and reduced visibility in blowing snow as winds gusted to 30 mph.

Heavy Snow in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 09-DEC-21 10:00:00 to 10-DEC-21 03:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Over two feet of snow fell in the mountains with generally 4 to 9 inches of snow reported at elevations below 8000 feet.

Heavy Snow in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 09-DEC-21 11:00:00 to 10-DEC-21 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Generally 10 to 20 inches of snow fell across the area.

Heavy Snow in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 08-DEC-21 14:00:00 to 10-DEC-21 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 20 to 30 inches of snow fell across the area with locally higher amounts of up to 35 inches estimated at the Spud Mountain SNOTEL site.

Winter Weather in CENTRAL COLORADO RIVER BASIN, COLORADO
From 09-DEC-21 20:00:00 to 10-DEC-21 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 2 to 8 inches of snow fell across the area. Winds gusted up to 30 mph.

Winter Weather in ANIMAS RIVER BASIN, COLORADO
From 09-DEC-21 20:30:00 to 10-DEC-21 08:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 4 to 8 inches of snow fell across the area with locally higher amounts in the foothills. Winds gusted up to 32 mph.

Winter Weather in SAN JUAN RIVER BASIN, COLORADO
From 09-DEC-21 13:30:00 to 10-DEC-21 15:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 5 to 10 inches of snow fell across the area.

Heavy Snow in LOWER YAMPA RIVER BASIN, COLORADO
From 09-DEC-21 22:00:00 to 10-DEC-21 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Generally 6 to 7 inches of snow fell across the area.

Winter Storm in CENTRAL YAMPA RIVER BASIN, COLORADO
From 09-DEC-21 20:00:00 to 10-DEC-21 16:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Generally 4 to 8 inches of snow fell across the area with locally higher amounts of up to 12 inches. Winds gusted to 32 mph.

Heavy Snow in ROAN AND TAVAPUTS PLATEAUS, COLORADO
From 09-DEC-21 07:00:00 to 10-DEC-21 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

An estimated 14 inches of snow fell at Douglas Pass.

Winter Storm in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 08-DEC-21 18:00:00 to 10-DEC-21 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Generally 20 plus inches of snow fell at SNOTEL sites across the region. Winds gusted up to 55 mph.

Heavy Snow in UPPER YAMPA RIVER BASIN, COLORADO
From 09-DEC-21 21:00:00 to 10-DEC-21 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 6 to 10 inches of snow fell across the area.