A broad Pacific trough transitioned to a closed low as it approached the Four Corners Region. Unsettled southwesterly flow ahead of this system led to moderate to heavy snow over the southern valleys and mountains before the low lifted northeast across western Colorado. This transition led to more widespread precipitation with accumulating snow occurring in most locations, particularly under heavier snow bands. However, there were some breaks in precipitation as drier air worked into the area at times. Wind gusts in the valley exceeded 30 mph during the storm.

Winter Weather in GRAND AND BATTLEMENT MESAS, COLORADO
From 28-DEC-20 04:00:00 to 29-DEC-20 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 4 to 10 inches of snow fell across the area with locally higher amounts of up to 18 inches reported.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 28-DEC-20 07:00:00 to 29-DEC-20 08:00:00 (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 of up to 11 inches reported.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 28-DEC-20 05:00:00 to 29-DEC-20 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 5 to 10 inches of snow fell across the area with locally higher amounts of up to 18 inches reported.

Winter Weather in FLATTOP MOUNTAINS, COLORADO
From 28-DEC-20 09:00:00 to 29-DEC-20 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Generally 7 to 13 inches of snow fell across the area.

Winter Weather in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 28-DEC-20 07:30:00 to 29-DEC-20 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 6 to 12 inches of snow fell across the area.

Winter Weather in ANIMAS RIVER BASIN, COLORADO
From 27-DEC-20 18:30:00 to 30-DEC-20 00:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 3 to 6 inches of snow fell across the area with up to 8 inches reported north of Bayfield. Winds gusted up to 33 mph at times.

Winter Weather in SAN JUAN RIVER BASIN, COLORADO
From 27-DEC-20 16:30:00 to 30-DEC-20 02:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 2 to 5 inches of snow fell across the area.

Winter Weather in ROAN AND TAVAPUTS PLATEAUS, COLORADO
From 28-DEC-20 03:00:00 to 29-DEC-20 11:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Department of Highways measured 14 inches of snow over Douglas Pass.

Winter Weather in UPPER YAMPA RIVER BASIN, COLORADO
From 28-DEC-20 11:00:00 to 29-DEC-20 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 4 to 8 inches of snow fell across the area.

Winter Weather in CENTRAL COLORADO RIVER BASIN, COLORADO
From 28-DEC-20 07:30:00 to 29-DEC-20 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 3 to 10 inches of snow fell across the area.

Winter Weather in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 28-DEC-20 03:00:00 to 29-DEC-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 4 to 9 inches of snow fell across the area.

Winter Weather in CENTRAL YAMPA RIVER BASIN, COLORADO
From 28-DEC-20 09:00:00 to 29-DEC-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Generally 3 to 6 inches of snow fell across the area.

Winter Weather in GRAND VALLEY, COLORADO
From 28-DEC-20 06:00:00 to 29-DEC-20 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Generally 1 to 4 inches of snow fell across the area.

Winter Weather in DEBEQUE TO SILT CORRIDOR, COLORADO
From 28-DEC-20 07:15:00 to 30-DEC-20 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 2 to 5 inches of snow fell across the area.

Winter Weather in LOWER YAMPA RIVER BASIN, COLORADO
From 28-DEC-20 09:00:00 to 29-DEC-20 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 4 to 6 inches of snow fell across the area.

Heavy Snow in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 27-DEC-20 16:30:00 to 29-DEC-20 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 10 to 18 inches of snow fell across the area with locally higher amounts of up to 2 feet reported.

Winter Weather in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 28-DEC-20 11:00:00 to 29-DEC-20 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 4 to 12 inches of snow fell across the area.