This snowfall event generally began on the 27th under a moist southwest flow which followed on the heels of a storm which vacated the area earlier on the same day.  However, snowfall actually began for some lower elevations of northwest Colorado late on the 26th.  The potent Pacific trough which moved over the region on January 28th and 29th generally produced the greatest amount of snowfall for most areas during the five-day period which included a moist northwest flow on January 30th and 31st.
During this five day event, January 27th through January 31st, there were two significant  events; one event was with the moist southwest flow and upper trough passage and the second event was the moist northwest flow. For some zones the snowfall persisted unabated through both events (COZ004-013). However, in some other zones snowfall occured during both events, though the snowfall was separated by an interlude of little or no snowfall which required two separate highlights for those zones.

Winter Storm in GRAND AND BATTLEMENT MESAS, COLORADO
From 27-JAN-13 12:00:00 to 29-JAN-13 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 12 to 27 inches were measured across the area.  Additionally, wind gusts of 30 to 55 mph produced areas of blowing and drifting snow, with localized blizzard conditions.

Winter Storm in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 28-JAN-13 00:00:00 to 29-JAN-13 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 8 to 15 inches were measured across the area.  Additionally, wind gusts of 25 to 40 mph produced areas of blowing and drifting snow.

Winter Weather in ROAN AND TAVAPUTS PLATEAUS, COLORADO
From 27-JAN-13 19:00:00 to 28-JAN-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall totals of 3 to 8 inches were measured across the area.  Additionally, wind gusts of 30 to 55 mph produced areas of blowing and drifting snow, with localized blizzard conditions.

Winter Weather in UPPER YAMPA RIVER BASIN, COLORADO
From 26-JAN-13 21:00:00 to 29-JAN-13 00:00:00 (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.  Additionally, wind gusts of 20 to 25 mph produced localized blowing and drifting snow.

Winter Weather in ANIMAS RIVER BASIN, COLORADO
From 27-JAN-13 21:00:00 to 28-JAN-13 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 1 to 4 inches were measured across the area.

Winter Storm in SAN JUAN RIVER BASIN, COLORADO
From 27-JAN-13 21:00:00 to 29-JAN-13 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 6 to 14 inches were measured across the area.  Additionally, wind gusts of 20 to 30 mph produced areas of blowing and drifting snow.

Winter Storm in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 27-JAN-13 13:00:00 to 29-JAN-13 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall totals of 12 to 22 inches were measured across the area.  Additionally, wind gusts of 25 to 50 mph produced areas of blowing and drifting snow, with localized blizzard conditions.

Winter Storm in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 27-JAN-13 11:00:00 to 29-JAN-13 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall totals of 12 to 30 inches were measured across the area.  Locally higher amounts included 44 inches at Silverton Mountain Ski Area.  Additionally, wind gusts of 30 to 60 mph produced areas of blowing and drifting snow, with localized blizzard conditions.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 30-JAN-13 05:00:00 to 31-JAN-13 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 3 to 12 inches were measured across the area.  Locally higher amounts included 16 inches at McClure Pass and 22 inches at the Irwin Ski Area.  Additionally, wind gusts of 20 to 40 mph produced areas of blowing and drifting snow.

Winter Storm in FLATTOP MOUNTAINS, COLORADO
From 27-JAN-13 21:00:00 to 31-JAN-13 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Snowfall totals of 12 to 30 inches were measured across the area.  Additionally, wind gusts of 25 to 40 mph produced areas of blowing and drifting snow.

Winter Storm in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 27-JAN-13 23:00:00 to 29-JAN-13 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 12 to 16 inches were measured above the 8000 foot level. Additionally, wind gusts of 25 to 40 mph produced areas of blowing and drifting snow.

Winter Storm in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 28-JAN-13 00:00:00 to 31-JAN-13 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 20 to 50 inches were measured across the area, including 50 inches at Steamboat Springs Ski Area.  Additionally, wind gusts of 25 to 45 mph produced areas of blowing and drifting snow.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 27-JAN-13 14:00:00 to 29-JAN-13 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 6 to 10 inches were measured across the area.  Locally higher amounts included 15 inches at Sunlight Ski Area.  Additionally, wind gusts of 20 to 40 mph produced areas of blowing and drifting snow.

Winter Weather in FOUR CORNERS / UPPER DOLORES RIVER BASIN, COLORADO
From 27-JAN-13 03:00:00 to 28-JAN-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 2 to 6 inches were measured across the area.  Locally higher amounts included 7 to 8 inches in the Mancos and Dolores areas.  Additionally, wind gusts of 20 to 30 mph produced localized blowing and drifting snow.

Winter Weather in LOWER YAMPA RIVER BASIN, COLORADO
From 26-JAN-13 23:00:00 to 28-JAN-13 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 4 to 6 inches were measured across the area.  Locally higher amounts included 7 to 9 inches in the Rangely and Massadona areas.  Additionally, wind gusts of 20 to 35 mph produced areas of blowing and drifting snow.

Winter Weather in DEBEQUE TO SILT CORRIDOR, COLORADO
From 28-JAN-13 07:00:00 to 28-JAN-13 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 3 to 6 inches were measured across the area.  Locally higher amounts included 8 in the Mesa area and 9 to 11 inches in the Collbran area.  Additionally, wind gusts of 20 to 25 mph produced localized blowing and drifting snow.

Winter Weather in CENTRAL YAMPA RIVER BASIN, COLORADO
From 26-JAN-13 23:00:00 to 29-JAN-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall totals of 3 to 6 inches were measured across the area.  Locally higher amounts included 9 inches at Hayden and 13 inches at a location about 33 miles north of Craig. Additionally, wind gusts of 25 to 35 mph produced areas of blowing and drifting snow.

Winter Weather in CENTRAL COLORADO RIVER BASIN, COLORADO
From 28-JAN-13 09:00:00 to 30-JAN-13 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 3 to 6 inches were measured across the area.  Locally higher amounts included 7 to 9 inches in the Glenwood Springs area, Glenwood Canyon, and just southeast of Gypsum.  Additionally, wind gusts of 20 to 30 mph produced localized blowing and drifting snow.

Winter Weather in UPPER GUNNISON RIVER VALLEY, COLORADO
From 26-JAN-13 11:00:00 to 28-JAN-13 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 3 to 6 inches were measured across the area.  Locally higher amounts included 8 to 9 inches in the Doyleville and Parlin areas, as well as 12 inches at Black Canyon of the Gunnison National Park.

Winter Storm in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 29-JAN-13 09:00:00 to 31-JAN-13 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 8 to 16 inches were measured across the area.  Additionally, wind gusts of 20 to 35 mph produced localized blowing and drifting snow.  I-70 in the Vail area was closed for a period of time due to the inclement weather conditions.

Winter Storm in UPPER YAMPA RIVER BASIN, COLORADO
From 29-JAN-13 08:00:00 to 31-JAN-13 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 12 to 16 inches were measured across the area.

Winter Weather in CENTRAL COLORADO RIVER BASIN, COLORADO
From 30-JAN-13 15:00:00 to 31-JAN-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totals of 3 to 6 inches were measured across the area.  Locally higher amounts included 8 to 9 inches at a location about 5 miles north of Carbondale.  Additionally, wind gusts of 20 to 30 mph produced localized blowing and drifting snow.

Winter Weather in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 30-JAN-13 10:00:00 to 31-JAN-13 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall totals of 3 to 9 inches were measured across the area.  Additionally, wind gusts of 25 to 45 mph produced areas of blowing and drifting snow.