A slow moving storm system moved across the Four Corners region and strengthened as it moved into southeastern Colorado.  The southeasterly flow aloft initially produced snowfall in the and near the foothills of Larimer County.  By late in the afternoon on the 1st, a deep east to northeasterly flow upslope produced moderate to heavy snowfall that continued through the evening across the rest of Front Range Mountains, Foothills and adjacent plains.  The combination of heavy snow and strong winds produced extensive blowing and drifting snow along the Palmer Divide and across the northeast plains of Colorado.  Snowdrifts from 3 to 6 ft deep were observed. Numerous roads and highways were closed east of the Interstate 25, including I-70 and I-76 respectively overnight, as the roadways became impassable.  The road closures continued through the morning hours as bands of light to moderate snow, with gusty winds to 35 mph persisted.  The roads were reopened by the afternoon of the 2nd.  In addition,  at Denver International Airport, 480 were cancelled on the 1st, with an additional 125 flights on the 2nd.   The official measurement at Denver International Airport was 11.6 inches.
In the mountains and foothills, storm totals included:  35.5 inches at Buckhorn Mountain; 25 inches, 4 miles west-southwest of Eldorado Springs; 24 inches at Genesee and 12.5 miles northwest of Golden; 22.5 inches, 4 miles east-northeast of Nederland; 21 inches, 4 miles south-southeast of Pinecliffe; 16.5 inches, 4 miles south-southeast of Brookvale; 14.5 inches near Estes Park; 14 inches at Intercanyon; 13 inches 4 miles west-northwest of Berthoud; Echo Mountain and  3 miles east-southeast of Tiny Town; 12.5 inches near Breckenridge, 12 inches near Antero Junction, 4 miles west-northwest of Conifer and Eldora Ski Area; 11 inches at Roxborough State Park; 9.5 inches, 3 miles southwest of Golden; 9 inches near Bergen Park and Strontia Springs Dam; with 8 inches, 3 miles north of Black Hawk.
Across the Interstate 25 Corridor, storm totals included:  19.5 inches near Parker; 18.5 inches, 4 miles north-northwest of Larkspur; 15 inches just north of Loveland; 14.5 inches near Louisville; 14 inches in northwest Arvada and Ken Caryl; 13 inches near Federal Heights, Northglenn and Ralston Reservoir; 12.5 inches, 4 miles south of Ft Collins; 12 inches in Broomfield, 3 miles north-northwest of Buckley AFB, near Castle Rock, Erie, Highlands Ranch and Wellington; 11.5 inches near Westminster; 11 inches, 3 miles south-southeast of Denver, north Longmont, Lafayette and Mead; 10 inches near Aurora, 3 miles east of Franktown and Wheat Ridge; 9.5 inches in Thornton; 9 inches at Frederick.
Across the Palmer Divide and adjacent plains, storm totals included:  21 inches, 4 miles northwest of Elizabeth; 14 inches, 8 miles southeast of Watkins; 12 inches at Agate and Burdett; 11 inches at Hereford; 10 inches, 4 miles south-southeast of Bennett and near Greeley, Holyoke and 21 miles north of New Raymer;  9 inches near Akron and Byers; 8 inches, 8 miles northwest of Greeley; 7 inches near Hugo; 6 inches near Ft Morgan, Karval and Sterling.

Winter Storm in S & SE GRAND / W CENTRAL & SW BOULDER / GILPIN / CLEAR CREEK / SUMMIT / N & W PARK COUNTIES ABOVE 9000 FEET, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: SNOTEL

Winter Storm in LARIMER & BOULDER COUNTIES BETWEEN 6000 & 9000 FEET, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Mesonet

Winter Storm in JEFFERSON & W DOUGLAS COUNTIES ABOVE 6000 FEET / GILPIN / CLEAR CREEK / NE PARK COUNTIES BELOW 9000 FEET, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in LARIMER COUNTY BELOW 6000 FEET / NW WELD COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in BOULDER & JEFFERSON COUNTIES BELOW 6000 FEET / W BROOMFIELD COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in N DOUGLAS COUNTY BELOW 6000 FEET / DENVER / W ADAMS & ARAPAHOE COUNTIES / E BROOMFIELD COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in ELBERT / C & E DOUGLAS COUNTIES ABOVE 6000 FEET, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in NE WELD COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in C & S WELD COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in MORGAN COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in C & E ADAMS & ARAPAHOE COUNTIES, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 12:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in N & NE ELBERT COUNTY BELOW 6000 FEET / N LINCOLN COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 15:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in SE ELBERT COUNTY BELOW 6000 FEET / SOUTH LINCOLN COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 15:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in LOGAN COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 15:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in WASHINGTON COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 15:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in SEDGWICK COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 15:00:00 (MST-7)
Reported by: Trained Spotter

Winter Storm in PHILLIPS COUNTY, COLORADO
From 01-FEB-16 00:00:00 to 02-FEB-16 15:00:00 (MST-7)
Reported by: Trained Spotter