The first in a series of powerful winter storms brought a period of heavy snow to the north central mountains, Front Range Foothills and Urban Corridor.  In the mountains and foothills, the heaviest snowfall occurred along and north of the Interstate 70 corridor.  Storm totals ranged from one to around three feet.  Eastbound I-70 was closed at Vail and Silverthorne because of poor conditions and several spun-out vehicles.  Across the Interstate 25 corridor, heavy snowfall fell over northern parts of metro Denver north to around Fort Collins.  At Denver International Airport, 145 flights were canceled.
Some of the storm totals in the mountains and foothills included:  38.5 inches at Mt. Zirkel, 23 inches just northeast of Rabbit Ears Pass, 21.8 inches, 9 miles south-southeast of Spicer; 19.7 inches 5 miles northeast of Ward,  18 inches, 9 miles east of Glendive and 16 miles west-southwest of Walden;  17 inches, 3 miles south of Brainard Lake and Copeland Lake; 16 inches at Arapaho Basin and 5 miles east-northeast of Nederland and Niwot Ridge SNOTEL; 15.7 inches at Eldora, 15 inches at Estes Park, 14.5 inches at Berthoud Pass; 14 inches at Allenspark, 12.9 inches, 7 miles east-northeast of Virginia Dale, 12.7 inches in Breckenridge and 12 inches at Gross Reservoir.
Along the I-25 corridor, some of the storm totals included:  13.8 inches in Boulder, 12 inches at Marston Reservoir, 9.5 inches in Niwot, 9 inches at Flatiron Reservoir, 8.3 inches in Northglenn; 8 inches at Hygiene, 7 inches in Arvada, 5 miles west-northwest of Brighton, Frederick, Lafayette, Loveland and 5 miles northeast of Westminster; with 6.5 inches at Ralston Reservoir and Wheat Ridge.

Winter Storm in WEST JACKSON & WEST GRAND COUNTIES ABOVE 9000 FEET, COLORADO
From 03-JAN-17 20:00:00 to 05-JAN-17 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  38.7, 4 miles souitheast of Mt. Zirkel, 21.8 inches, 9 miles south-southeast of Spicer and 19 inches at Tower.

Winter Storm in GRAND & SUMMIT COUNTIES BELOW 9000 FEET, COLORADO
From 03-JAN-17 20:00:00 to 05-JAN-17 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included 12 inches near Stillwater Creek and 11 inches near Grand Lake.

Winter Storm in S & E JACKSON / LARIMER / N & NE GRAND / NW BOULDER COUNTIES ABOVE 9000 FEET, COLORADO
From 03-JAN-17 20:00:00 to 05-JAN-17 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  17 inches at Deadman Hill, 13 inches at Willow Park and 12 inches at Long Draw Reservoir.

Winter Storm in S & SE GRAND / W CENTRAL & SW BOULDER / GILPIN / CLEAR CREEK / SUMMIT / N & W PARK COUNTIES ABOVE 9000 FEET, COLORADO
From 03-JAN-17 20:00:00 to 05-JAN-17 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  16 inches in Niwot Ridge, 14.5 inches, 5 miles west-southwest of Guanella Pass and 13.3 inches at Loveland Pass, 12 inches at Eldora, and Winter Park Ski Areas.

Winter Storm in LARIMER & BOULDER COUNTIES BETWEEN 6000 & 9000 FEET, COLORADO
From 03-JAN-17 20:00:00 to 05-JAN-17 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals included:  17 inches at Copeland Lake, 15 inches at Estes Park, 14.5 inches, 3 miles west of Jamestown; 14 inches at Allenspark and 12 inches at Gross Reservoir.

Winter Storm in LARIMER COUNTY BELOW 6000 FEET / NW WELD COUNTY, COLORADO
From 04-JAN-17 14:00:00 to 05-JAN-17 04:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included:  9 inches at Flatiron Reservoir, 7 inches near Loveland, with 5 inches at Colorado State University in Ft. Collins.

Winter Storm in BOULDER & JEFFERSON COUNTIES BELOW 6000 FEET / W BROOMFIELD COUNTY, COLORADO
From 04-JAN-17 14:00:00 to 05-JAN-17 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included:  13.8 inches in Boulder, 12 inches in Marston Reservoir, 11 inches in Erie, 9.5 inches in Niwot, with 7 inches in Arvada and near Frederick.

Winter Storm in N DOUGLAS COUNTY BELOW 6000 FEET / DENVER / W ADAMS & ARAPAHOE COUNTIES / E BROOMFIELD COUNTY, COLORADO
From 04-JAN-17 14:00:00 to 05-JAN-17 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included 7 inches near Brighton and Westminster, with 6.7 inches near Northglenn.

Winter Weather in JEFFERSON & W DOUGLAS COUNTIES ABOVE 6000 FEET / GILPIN / CLEAR CREEK / NE PARK COUNTIES BELOW 9000 FEET, COLORADO
From 04-JAN-17 14:00:00 to 05-JAN-17 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included 9 inches at Aspen Springs and Georgetown, with 5 inches in Bailey.