A cold Pacific storm system produced significant to heavy snow across portions of western Colorado mostly within a 24-hour period from Saturday, January 20th to Sunday, January 21st.  The snowfall persisted into Sunday night mainly over some northwest facing mountain slopes. Some lower elevation precipitation began as rain on Saturday and then changed over to snow with the passage of a strong cold front.

Winter Storm in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 20-JAN-18 10:00:00 to 21-JAN-18 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall totals generally ranged from 7 to 17 inches across the area, including 12 to 17 inches on Colorado Highway 550 from just below Ouray to Red Mountain Pass.

Winter Weather in LOWER YAMPA RIVER BASIN, COLORADO
From 20-JAN-18 09:00:00 to 21-JAN-18 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totals generally ranged from 2 to 5 inches across the area.

Winter Weather in CENTRAL YAMPA RIVER BASIN, COLORADO
From 20-JAN-18 09:00:00 to 21-JAN-18 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 4 to 7 inches were measured across the area. Roads became snowpacked which made travel difficult.  Colorado Highway 64 was closed for two hours about 22 miles east of Rangely during the storm due to a jackknifed truck.

Winter Storm in ROAN AND TAVAPUTS PLATEAUS, COLORADO
From 20-JAN-18 09:00:00 to 20-JAN-18 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts of 10 to 18 inches were measured across the area, including 18 inches on Highway 139 over Douglas Pass.

Winter Weather in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 20-JAN-18 07:00:00 to 21-JAN-18 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 4 to 8 inches were measured across the area.  Locally higher amounts included 10 inches at a location about 4 miles east-southeast of Steamboat Springs.

Winter Weather in UPPER YAMPA RIVER BASIN, COLORADO
From 20-JAN-18 21:00:00 to 21-JAN-18 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 3 to 7 inches were measured across the area.

Winter Weather in GRAND VALLEY, COLORADO
From 21-JAN-18 00:30:00 to 21-JAN-18 09:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A band of snowfall over the Grand Valley produced measured snowfall totals of 2 to 4 inches.  Locally higher amounts included 5.5 inches in the Pear Park area of Grand Junction.

Winter Weather in DEBEQUE TO SILT CORRIDOR, COLORADO
From 21-JAN-18 03:00:00 to 21-JAN-18 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Measured snowfall totals generally ranged from 2 to 5 inches across the area.

Winter Weather in GRAND AND BATTLEMENT MESAS, COLORADO
From 20-JAN-18 18:00:00 to 21-JAN-18 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals generally ranged from 7 to 12 inches across the area.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 20-JAN-18 20:00:00 to 21-JAN-18 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured snowfall totals ranged from 6 to 8 inches across the area. Roads became snowpacked and Vail Pass on Interstate 70 was closed for about an hour during the storm due to a jackknifed truck.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 20-JAN-18 15:00:00 to 21-JAN-18 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured snowfall totals generally ranged from 6 to 10 inches, except for 12 inches at a location 7 miles west of Crested Butte.

Winter Weather in FLATTOP MOUNTAINS, COLORADO
From 20-JAN-18 07:00:00 to 21-JAN-18 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Snowfall totals generally ranged from 4 to 8 inches across the area with a locally higher amount of 14 inches measured at the Bison Lake SNOTEL site.

Winter Weather in UPPER GUNNISON RIVER VALLEY, COLORADO
From 20-JAN-18 21:30:00 to 21-JAN-18 15:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 3 to 8 inches were measured across the area.

Winter Weather in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 20-JAN-18 18:00:00 to 21-JAN-18 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totals of 6 to 9 inches were measured across the area.

Winter Weather in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 20-JAN-18 14:00:00 to 21-JAN-18 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall totals generally ranged from 6 to 12 inches across the area.  A locally higher amount included 13 inches at the Sharks Tooth SNOTEL site.

Winter Weather in PARADOX VALLEY / LOWER DOLORES RIVER BASIN, COLORADO
From 21-JAN-18 02:00:00 to 21-JAN-18 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Measured snowfall totals generally ranged from 2 to 5 inches across the area.

Winter Weather in FOUR CORNERS / UPPER DOLORES RIVER BASIN, COLORADO
From 20-JAN-18 18:00:00 to 21-JAN-18 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Measured snowfall totals ranged from 3 to 6 inches across the area.

Winter Weather in ANIMAS RIVER BASIN, COLORADO
From 20-JAN-18 19:00:00 to 21-JAN-18 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Measured snowfall totals ranged from 2 to 4 inches across the area.

Winter Weather in SAN JUAN RIVER BASIN, COLORADO
From 20-JAN-18 18:00:00 to 21-JAN-18 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 3 to 6 inches were measured across the area.