A midlevel trough in the northwesterly flow trekked across western Colorado. Plenty of residual moisture paired with the additional influx and support from the shortwave led to moderate snowfall across much of the mountains as well as some valley locations. Wind gusts exceeded 45 mph in the higher elevations and greater than 30 mph in the valleys at times.

Winter Weather in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 11-DEC-20 20:00:00 to 12-DEC-20 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Generally 5 to 8 inches of snow fell across the area.

Winter Weather in GRAND AND BATTLEMENT MESAS, COLORADO
From 12-DEC-20 02:00:00 to 12-DEC-20 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

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

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 12-DEC-20 07:00:00 to 12-DEC-20 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Generally 3 to 5 inches of snow fell across the area with locally higher amounts up to 7 inches.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 12-DEC-20 08:00:00 to 13-DEC-20 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Generally 5 to 7 inches of snow fell across the area with up to 10 inches estimated by the Schofield Pass SNOTEL site. Winds gusted up to 45 mph.

Winter Weather in FLATTOP MOUNTAINS, COLORADO
From 12-DEC-20 05:00:00 to 12-DEC-20 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Generally 3 to 6 inches of snow fell across the area with 10 inches estimated at the Bison Lake SNOTEL site.

Winter Weather in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 12-DEC-20 06:00:00 to 12-DEC-20 20:00:00 (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 close to 10 inches measured by an observer 4 miles northwest of Ridgway.

Winter Weather in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 12-DEC-20 04:00:00 to 12-DEC-20 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 8 to 10 inches of snow fell across the area.

Winter Weather in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 12-DEC-20 02:00:00 to 12-DEC-20 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 6 to 10 inches of snow fell across the northern tier of the zone with 4 to 6 inches across the south.

Winter Weather in ANIMAS RIVER BASIN, COLORADO
From 12-DEC-20 11:00:00 to 12-DEC-20 18:00:00 (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 locally higher amounts up to 8 inches. Winds gusted to 35 mph.

Winter Weather in SAN JUAN RIVER BASIN, COLORADO
From 12-DEC-20 11:00:00 to 12-DEC-20 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 6 to 8 inches of snow fell across the area.

Winter Weather in LOWER YAMPA RIVER BASIN, COLORADO
From 12-DEC-20 07:00:00 to 13-DEC-20 12:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 2 to 5 inches of snow fell across the area. Winds gusted to 30 mph.

Winter Weather in PARADOX VALLEY / LOWER DOLORES RIVER BASIN, COLORADO
From 12-DEC-20 11:00:00 to 12-DEC-20 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 2 to 4 inches of snow fell across the area.

Winter Weather in FOUR CORNERS / UPPER DOLORES RIVER BASIN, COLORADO
From 12-DEC-20 11:00:00 to 12-DEC-20 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Generally 3 to 6 inches of snow fell across the area. Winds gusted to 36 mph.