A moist and cold upper low moved across the area and was quickly followed by an upper trough which produced a prolonged period of snowfall for much of the region.

Winter Storm in GRAND AND BATTLEMENT MESAS, COLORADO
From 08-FEB-13 21:00:00 to 11-FEB-13 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 10 to 23 inches were measured across the area.  Wind gusts of 20 to 35 mph early in this event produced areas of blowing snow.

Heavy Snow in FLATTOP MOUNTAINS, COLORADO
From 08-FEB-13 21:00:00 to 11-FEB-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Snowfall amounts of 10 to 14 inches were measured across the area.

Heavy Snow in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 09-FEB-13 03:00:00 to 11-FEB-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Snowfall amounts of 12 to 18 inches were measured above the 7500 foot level.

Winter Storm in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 08-FEB-13 11:00:00 to 10-FEB-13 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts of 10 to 13 inches were measured across the area.  Wind gusts of 20 to 30 mph produced areas of blowing snow.  Even stronger winds accompanied the snowfall early in this event, which included a gust to 71 mph on Mount Abrahms.

Heavy Snow in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 08-FEB-13 04:00:00 to 11-FEB-13 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts of 1 to 3 feet were measured across the area.  Locally higher amounts included 39 inches at the top of Durango Mountain Ski Area.  Wind gusts of 20 to 35 mph early in this event produced areas of blowing snow.  Wind gusts of 20 to 30 mph produced areas of blowing and drifting snow.

Winter Storm in ROAN AND TAVAPUTS PLATEAUS, COLORADO
From 08-FEB-13 21:00:00 to 11-FEB-13 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts of around 12 inches were measured above the 7500 foot level.  Wind gusts of 20 to 35 mph early in this event produced areas of blowing snow.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 09-FEB-13 00:00:00 to 11-FEB-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 6 to 12 inches were measured across the area.  Locally higher amounts included 14 inches at Snowmass Ski Area.

Winter Weather in CENTRAL YAMPA RIVER BASIN, COLORADO
From 09-FEB-13 01:00:00 to 10-FEB-13 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

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

Winter Weather in UPPER YAMPA RIVER BASIN, COLORADO
From 09-FEB-13 03:00:00 to 10-FEB-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

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

Winter Weather in UPPER GUNNISON RIVER VALLEY, COLORADO
From 09-FEB-13 04:00:00 to 11-FEB-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of around 3 inches were measured across the area.  Locally higher amounts included 12 inches at Black Canyon of the Gunnison National Park.

Winter Storm in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 08-FEB-13 21:00:00 to 11-FEB-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 12 to 18 inches were measured across the area.  Wind gusts of 20 to 30 mph produced areas of blowing and drifting snow.

Heavy Snow in ANIMAS RIVER BASIN, COLORADO
From 09-FEB-13 07:00:00 to 09-FEB-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 4 to 7 inches were measured across the area.

Heavy Snow in SAN JUAN RIVER BASIN, COLORADO
From 09-FEB-13 08:00:00 to 09-FEB-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 4 to 7 inches were measured across the area.

Winter Weather in CENTRAL COLORADO RIVER BASIN, COLORADO
From 09-FEB-13 03:00:00 to 09-FEB-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 3 to 6  inches were measured across the eastern portion of the area.

Heavy Snow in FOUR CORNERS / UPPER DOLORES RIVER BASIN, COLORADO
From 09-FEB-13 04:00:00 to 09-FEB-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 4 to 7 inches were measured across the area.

Heavy Snow in SAN JUAN RIVER BASIN, COLORADO
From 09-FEB-13 23:00:00 to 11-FEB-13 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 5 to 8 inches were measured across the area during the designated time period.  The actual three-day total snowfall amounts added up to around 12 inches in some locations.

Winter Weather in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 10-FEB-13 11:00:00 to 11-FEB-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts of 4 to 8 inches were measured across the area during the designated time period.  The actual four-day total snowfall amounts added up to around 21 inches at some locations.

Winter Weather in GRAND VALLEY, COLORADO
From 11-FEB-13 02:00:00 to 11-FEB-13 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Snowfall amounts of around 1 inch occurred and made for a very treacherous morning commute in the Grand Valley which experiences very little snowfall accumulations.

Winter Weather in PARADOX VALLEY / LOWER DOLORES RIVER BASIN, COLORADO
From 09-FEB-13 16:00:00 to 11-FEB-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 3 to 6 inches were measured across the zone.  Locally higher amounts included 7 inches in the Norwood area.

Heavy Snow in ANIMAS RIVER BASIN, COLORADO
From 10-FEB-13 01:00:00 to 11-FEB-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 5 to 8 inches were measured across the area during the designated time period.  The actual three-day total snowfall amounts added up to around 11 inches in some locations.

Heavy Snow in FOUR CORNERS / UPPER DOLORES RIVER BASIN, COLORADO
From 09-FEB-13 23:00:00 to 10-FEB-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 5 to 8 inches were measured across the area during the designated time period.  The actual three-day total snowfall amounts added up to around 11 inches in some locations.

Heavy Snow in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 08-FEB-13 22:00:00 to 11-FEB-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 12 to 17 inches were measured across about half of the area.