A moist southwest flow aloft with an embedded trough was followed by an upper low which moved across the region.  This situation resulted in a prolonged snowfall event for western Colorado.  However, in some areas there was a significant cessation of snowfall between the two systems, which resulted in two separate events.

Winter Storm in FLATTOP MOUNTAINS, COLORADO
From 15-APR-13 02:00:00 to 17-APR-13 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Snowfall amounts of 16 to 30 inches were measured across the area.  Wind gusts of 20 to 40 mph produced areas of blowing and drifting snow.

Winter Weather in UPPER YAMPA RIVER BASIN, COLORADO
From 15-APR-13 00:00:00 to 15-APR-13 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 6 to 10 inches were measured across the area.

Winter Weather in ROAN AND TAVAPUTS PLATEAUS, COLORADO
From 15-APR-13 01:00:00 to 16-APR-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts of 5 to 8 inches were measured across the area.  Wind gusts of 20 to 30 mph produced some areas of blowing and drifting snow.

Winter Weather in DEBEQUE TO SILT CORRIDOR, COLORADO
From 15-APR-13 03:00:00 to 15-APR-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 2 to 6 inches were measured across the area.

Winter Storm in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 15-APR-13 00:00:00 to 16-APR-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 10 to 15 inches were measured across the area.  Wind gusts of 20 to 35 mph produced areas of blowing and drifting snow.

Winter Weather in LOWER YAMPA RIVER BASIN, COLORADO
From 15-APR-13 00:00:00 to 17-APR-13 07:00:00 (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 area.

Winter Weather in GRAND AND BATTLEMENT MESAS, COLORADO
From 16-APR-13 16:00:00 to 17-APR-13 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 5 to 10 inches were measured across the area. Wind gusts of 20 to 30 mph produced some areas of blowing and drifting snow.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 17-APR-13 04:00:00 to 17-APR-13 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 5 to 10 inches were measured across the area.  Locally higher amounts included 14 inches at the Beaver Creek SNOTEL site.  Wind gusts of 20 to 30 mph produced some areas of blowing and drifting snow.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 17-APR-13 04:00:00 to 17-APR-13 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 3 to 10 inches were measured across the area.  Wind gusts of 20 to 40 mph produced areas of blowing and drifting snow.

Winter Weather in UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE, COLORADO
From 17-APR-13 06:00:00 to 17-APR-13 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 5 to 7 inches were measured across the area.  Wind gusts of 20 to 35 mph produced areas of blowing and drifting snow.

Winter Weather in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 17-APR-13 08:00:00 to 17-APR-13 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts of 5 to 8 inches were measured across the area.  Locally higher amounts included 14 inches at Ouray.  Wind gusts of 30 to 45 mph produced widspread blowing and drifting snow.  Even stronger winds with blizzard conditions occurred in a few areas, including a gust to 60 mph at Huntsman Mesa and 87 mph on Mount Abrahms.

Heavy Snow in CENTRAL COLORADO RIVER BASIN, COLORADO
From 15-APR-13 04:00:00 to 17-APR-13 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 4 to 12 inches were measured across the area.  Locally higher amounts included 15 inches near Wolcott.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 15-APR-13 01:00:00 to 15-APR-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 5 to 11 inches were measured across the area.  Locally higher amounts included 14 inches at Schofield Pass.  Wind gusts of 20 to 30 mph produced some areas of blowing and drifting snow.

Winter Weather in GRAND AND BATTLEMENT MESAS, COLORADO
From 15-APR-13 06:00:00 to 16-APR-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 7 to 12 inches were measured across the area.  Wind gusts of 25 to 40 mph produced areas of blowing and drifting snow.  Locally higher wind gusts to 50 mph resulted in a few spots with blizzard conditions.

Winter Storm in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 14-APR-13 23:00:00 to 17-APR-13 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts of 12 to 21 inches were measured across the area.  Wind gusts of 25 to 40 mph produced areas of blowing and drifting snow.  Locally stronger gusts to 50 mph resulted in blizzard conditions.

Winter Weather in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 17-APR-13 04:00:00 to 18-APR-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall amounts of 4 to 10 inches were measured across the area.  Wind gusts of 30 to 45 mph produced widespread blowing and drifting snow.  Even stronger winds at ridgetops included a gust to 86 mph on Kendall Mountain.

Heavy Snow in GRAND VALLEY, COLORADO
From 16-APR-13 19:00:00 to 17-APR-13 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 4 to 8 inches were measured across the area.

Heavy Snow in DEBEQUE TO SILT CORRIDOR, COLORADO
From 16-APR-13 19:00:00 to 17-APR-13 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 7 to 12 inches were measured across the area.

Heavy Snow in CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN, COLORADO
From 17-APR-13 01:00:00 to 17-APR-13 17:00:00 (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.  Numerous vehicle accidents occurred due to the slick and snowpacked roads.

Winter Weather in UPPER YAMPA RIVER BASIN, COLORADO
From 16-APR-13 14:00:00 to 17-APR-13 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 5 to 12 inches were measured across the area.

Heavy Snow in CENTRAL YAMPA RIVER BASIN, COLORADO
From 15-APR-13 00:00:00 to 17-APR-13 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of 8 to 20 inches were measured across the area.