A Pacific low pressure system moved eastward across the area and produced significant snowfall in the mountains and some lower elevation areas of western Colorado. The Pacific low was quickly followed by Arctic air and gusty winds that spread southward across the northern and central portions of western Colorado.

Winter Weather in GRAND AND BATTLEMENT MESAS, COLORADO
From 01-FEB-11 00:00:00 to 01-FEB-11 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 6 to 12 inches were measured across the area for the duration of this event which began in January.  Locally higher amounts included 16 inches at Powderhorn Ski Area.  Wind gusts up to 30 mph produced localized blowing and drifting snow.

Winter Weather in FLATTOP MOUNTAINS, COLORADO
From 01-FEB-11 00:00:00 to 01-FEB-11 03:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Snowfall accumulations of 4 to 12 inches were measured across the area for the duration of this event which began in January.  Wind gusts of 20 to 30 mph produced localized blowing and drifting snow.

Winter Weather in SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 01-FEB-11 00:00:00 to 02-FEB-11 03:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall accumulations of 4 to 12 inches were measured across the area for the duration of this event which began in January and persisted into February 2nd. Locally higher amounts included 14 inches at Red Mountain Pass.  Wind gusts of 20 to 40 mph produced areas of blowing and drifting snow.

Winter Weather in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 01-FEB-11 00:00:00 to 01-FEB-11 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 5 to 10 inches were measured across the area for the duration of this event which began in January.  Locally higher amounts included 12 inches at Steamboat Springs Ski Area.  Wind gusts of 20 to 35 mph produced areas of blowing and drifting snow.

Winter Weather in SAN JUAN RIVER BASIN, COLORADO
From 01-FEB-11 00:00:00 to 01-FEB-11 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall accumulations of 2 to 6 inches were measured across the area for the duration of this event which began in January.

Winter Storm in NORTHWESTERN SAN JUAN MOUNTAINS, COLORADO
From 01-FEB-11 00:00:00 to 01-FEB-11 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall accumulations of 10 to 14 inches were measured across the area for the duration of this event which began in January. Locally higher amounts included 20 inches at Ouray. Wind gusts of 20 to 40 mph produced areas of blowing and drifting snow.

Winter Weather in WEST ELK AND SAWATCH MOUNTAINS, COLORADO
From 01-FEB-11 00:00:00 to 01-FEB-11 03:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snowfall accumulations of 4 to 8 inches were measured across the area for the duration of this event which began in January. Wind gusts of 15 to 25 mph produced localized blowing and drifting snow.

Winter Weather in GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS, COLORADO
From 01-FEB-11 00:00:00 to 01-FEB-11 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall accumulations of 4 to 12 inches were measured across the area for the duration of this event which began in January. Wind gusts of 20 to 30 mph produced localized blowing and drifting snow.

Extreme Cold/Wind Chill in LOWER YAMPA RIVER BASIN, COLORADO
From 01-FEB-11 16:00:00 to 02-FEB-11 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 25 degrees below zero to 45 degrees below zero Fahrenheit, as winds gusted 30 to 40 mph.

Extreme Cold/Wind Chill in CENTRAL YAMPA RIVER BASIN, COLORADO
From 01-FEB-11 00:00:00 to 02-FEB-11 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 30 degrees below zero to 50 degrees below zero Fahrenheit, as winds gusted 25 to 40 mph.

Extreme Cold/Wind Chill in ROAN AND TAVAPUTS PLATEAUS, COLORADO
From 01-FEB-11 06:00:00 to 02-FEB-11 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 35 degrees below zero to 60 degrees below zero Fahrenheit, as winds gusted 25 to 50 mph.

Extreme Cold/Wind Chill in DEBEQUE TO SILT CORRIDOR, COLORADO
From 01-FEB-11 17:00:00 to 02-FEB-11 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 25 degrees below zero to 35 degrees below zero Fahrenheit, as winds gusted 25 to 35 mph.

Extreme Cold/Wind Chill in UPPER GUNNISON RIVER VALLEY, COLORADO
From 01-FEB-11 18:00:00 to 02-FEB-11 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 25 degrees below zero to 35 degrees below zero Fahrenheit, as winds gusted 20 to 25 mph.

Extreme Cold/Wind Chill in GRAND AND BATTLEMENT MESAS, COLORADO
From 01-FEB-11 16:30:00 to 02-FEB-11 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 35 degrees below zero to 45 degrees below zero Fahrenheit, as winds gusted to 30 mph.

Extreme Cold/Wind Chill in ELKHEAD AND PARK MOUNTAINS, COLORADO
From 01-FEB-11 04:00:00 to 02-FEB-11 02:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 30 degrees below zero to 45 degrees below zero Fahrenheit, as winds gusted 25 to 35 mph.  Locally colder wind chill temperatures included 65 degrees below zero Fahrenheit at the Storm Peak Lab.

Extreme Cold/Wind Chill in UPPER YAMPA RIVER BASIN, COLORADO
From 01-FEB-11 11:00:00 to 01-FEB-11 20:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 25 degrees below zero to 30 degrees below zero Fahrenheit, as winds gusted up to 25 mph.

Extreme Cold/Wind Chill in CENTRAL COLORADO RIVER BASIN, COLORADO
From 01-FEB-11 17:00:00 to 02-FEB-11 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind chill temperatures ranged from 15 degrees below zero to 30 degrees below zero Fahrenheit, as winds gusted up to 25 mph.