A prolonged and very moist westerly flow aloft with embedded disturbances resulted in heavy snowfall accumulations, especially in the mountains.

Winter Storm in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 17-DEC-10 22:00:00 to 23-DEC-10 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Snowfall accumulations of 1 to 3 feet were measured across the area above the 8000 foot level.  Wind gusts of 25 to 40 mph produced areas of blowing snow.

Winter Storm in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 18-DEC-10 00:00:00 to 23-DEC-10 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High density snowfall accumulations of 1.5 feet to just over 3 feet of snow were measured across the area.  The 3 feet of snow accumulation at the Tower SNOTEL site consisted of 5.8 inches water equivalent.

Winter Storm in CENTRAL YAMPA RIVER BASIN, COLORADO
From 20-DEC-10 04:00:00 to 21-DEC-10 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 12 to 19 inches were measured across the area. Wind gusts of 15 to 25 mph produced areas of blowing snow.

Winter Storm in UPPER YAMPA RIVER BASIN, COLORADO
From 18-DEC-10 04:00:00 to 22-DEC-10 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 11 to 20 inches were measured across the area.  Locally heavier accumulations included 30 inches at Clark.

Avalanche in ROAN AND TAVAPUTS PLATEAUS, COLORADO
From 19-DEC-10 07:00:00 to 23-DEC-10 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall accumulations of 12 to 20 inches were measured across the area.  Wind gusts of 20 to 40 mph produced areas of blowing and drifting snow.

Winter Storm in GRAND AND BATTLEMENT MESAS, COLORADO
From 17-DEC-10 20:00:00 to 23-DEC-10 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High density snowfall accumulations of 2 to 3 feet were measured across the area.  Locally heavier amounts included 44 inches at Trickle Park Reservoir, with a water equivalent of 9.70 inches.

Winter Storm in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 17-DEC-10 23:00:00 to 23-DEC-10 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 1 to 3 feet were measured across the area.  The snowfall event in this area were punctuated by a series of lulls.

Winter Storm in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 17-DEC-10 23:00:00 to 23-DEC-10 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High density snowfall accumulations of 3 to 5 feet were measured across the area.  Locally heavier amounts included 97 inches at Gothic, with a water equivalent of 7.98 inches.

Winter Storm in FLATTOP MOUNTAINS, COLORADO
From 17-DEC-10 18:00:00 to 23-DEC-10 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High density snowfall accumulations of 1 to 3 feet were measured across the area.  Locally heavier amounts included 55 inches at the Bison Lake SNOTEL where the water equivalent was 6.50 inches.

Winter Storm in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 17-DEC-10 19:00:00 to 23-DEC-10 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall accumulations of 1 to 3 feet were measured across the area.  Wind gusts of 30 to 55 mph produced areas of blowing and drifting snow, mainly on high exposed areas.

Winter Storm in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 17-DEC-10 17:00:00 to 23-DEC-10 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall accumulations of 2 to 6 feet were measured across the area.  Locally heavier amounts included 77 inches on Highway 550 at Coal Bank Pass.  Wind gusts of 30 to 60 mph produced areas of blowing and drifting snow.  Travel across the area during this event was impossible at times.

Winter Weather in CENTRAL COLORADO RIVER BASIN, COLORADO
From 17-DEC-10 23:00:00 to 18-DEC-10 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 3 to 5 inches were measured across the area.

Winter Weather in PARADOX VALLEY / LOWER DOLORES RIVER BASIN, COLORADO
From 18-DEC-10 00:00:00 to 18-DEC-10 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 1 to 4 inches were measured across the area.  Locally heavier amounts included 6 inches in the Paradox area.

Winter Weather in FOUR CORNERS / UPPER DOLORES RIVER BASIN, COLORADO
From 17-DEC-10 20:00:00 to 18-DEC-10 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 3 to 6 inches were measured across the area.  Locally heavier amounts included 8 inches in the Mancos area.

Winter Weather in ANIMAS RIVER BASIN, COLORADO
From 17-DEC-10 20:00:00 to 19-DEC-10 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 3 to 6 inches were measured across the area.  Locally heavier amounts included 9 inches in Durango.

Winter Weather in SAN JUAN RIVER BASIN, COLORADO
From 17-DEC-10 22:00:00 to 19-DEC-10 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 2 to 4 inches were measured across the area.

Winter Storm in UPPER GUNNISON RIVER VALLEY, COLORADO
From 18-DEC-10 01:00:00 to 20-DEC-10 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 6 to 10 inches were measured across the area.  Wind gusts of 20 to 30 mph produced areas of blowing snow.

Winter Storm in LOWER YAMPA RIVER BASIN, COLORADO
From 20-DEC-10 04:00:00 to 21-DEC-10 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 12 to 15 inches were measured across the area.