A potent storm system dropped out of the northern Rockies and produced moderate to heavy snow over portions of the mountains, foothills and plains.  The heaviest snow fell in and near the foothills north of Interstate 70, and across the plains north of I-76.  One backcountry skier was killed by an avalanche near Red Peak, in the Gore Range west of Silverthorne.
In the mountains and foothills, storm totals included:  30 inches near Jamestown; 27 inches near Nederland; 22 inches near Allenspark; 21 inches near St Mary's Glacier; 18 inches in Estes Park, 16 inches near Crescent Village and Deer Ridge; 15.5 inches near Aspen Springs, 15 inches near Pinecliffe; 12 inches near Berthoud and Genesee; 11.5 inches, 9 miles west-southwest of Rustic, with 4 to 10 inches across the north central mountains and the remainder of the foothills.
Along the urban corridor and adjacent plains, the heaviest snowfall occurred across southeast Larimer, eastern Boulder, northeast Jefferson and central Weld Counties. Storm totals included:  16.9 inches in Boulder, which helped to establish a new seasonal snowfall record for the city;  14.5 inches in Niwot;  14 inches in Ft. Collins; 13.5 inches in Frederick; 13 inches in Broomfield, 12 inches in Lafayette and near Longmont; 10.5 inches in northwest Arvada, with 10 inches in Erie, Louisville, and Westminster.
Across the rest of the urban corridor and northeast plains, storm totals included:  8 inches in Iliff and near Windsor; 7.5 inches near Akron; 7 inches in Brighton; 6.5 inches in Edgewater and Northglenn; 5.5 inches in Greeley and 7 miles northwest of Purcell; with 2 to 5 inches elsewhere.

Winter Weather in S & SE GRAND / W CENTRAL & SW BOULDER / GILPIN / CLEAR CREEK / SUMMIT / N & W PARK COUNTIES ABOVE 9000 FEET, COLORADO
From 15-APR-20 18:00:00 to 16-APR-20 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals ranged from 4 to 8 inches.

Winter Weather in JEFFERSON & W DOUGLAS COUNTIES ABOVE 6000 FEET / GILPIN / CLEAR CREEK / NE PARK COUNTIES BELOW 9000 FEET, COLORADO
From 15-APR-20 20:00:00 to 16-APR-20 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included: 21 inches at St Mary's Glacier, 12 inches near Floyd Hill and Genesee; 8 inches at Aspen Springs, with 4 to 6 inches elsewhere.

Winter Weather in N DOUGLAS COUNTY BELOW 6000 FEET / DENVER / W ADAMS & ARAPAHOE COUNTIES / E BROOMFIELD COUNTY, COLORADO
From 15-APR-20 20:00:00 to 16-APR-20 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wide range of storm totals with 1 to 3 inches across southern and eastern sections of the Denver area, with 4 to 10 inches primarily in north Denver and western Adams counties.  A trained spotter in Westminster measured 10 inches of snowfall, with just 1.9 inches observed at Denver International Airport.

Winter Weather in LOGAN COUNTY, COLORADO
From 15-APR-20 21:00:00 to 16-APR-20 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Most areas reported 2 to 4 inches of snowfall, with 8 inches reported in Iliff.

Avalanche in S & SE GRAND / W CENTRAL & SW BOULDER / GILPIN / CLEAR CREEK / SUMMIT / N & W PARK COUNTIES ABOVE 9000 FEET, COLORADO
From 15-APR-20 13:00:00 to 15-APR-20 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A group of three backcountry skiers were involved in an avalanche near Red Peak in the Gore Range, west of the town of Silverthorne. The group ascended to the east summit of Red Peak (point 12,885'). They began their descent of a couloir on the north side of point 12,885'. During the descent they triggered a small avalanche. The avalanche swept one of the riders through the couloir and to the valley below.

Winter Storm in LARIMER & BOULDER COUNTIES BETWEEN 6000 & 9000 FEET, COLORADO
From 15-APR-20 20:00:00 to 16-APR-20 17:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included:  30.3 inches near Jamestown, 27 inches near Nederland; 22 inches near Allenspark, 20 inches near Glen Haven, 18 inches near Estes Park, 16 inches near Deer Ridge, 15.5 inches near Aspen Springs, 13.5 inches, 12 miles northwest of Livermore, with 12 inches near Berthoud.

Winter Storm in LARIMER COUNTY BELOW 6000 FEET / NW WELD COUNTY, COLORADO
From 15-APR-20 21:00:00 to 16-APR-20 17:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included:  14 inches in Ft. Collins; 10 inches at Flat Iron Reservoir and 8 inches near Lovelend.  Some tree damage was also reported in Fort Collins.

Winter Storm in BOULDER & JEFFERSON COUNTIES BELOW 6000 FEET / W BROOMFIELD COUNTY, COLORADO
From 15-APR-20 21:00:00 to 16-APR-20 17:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included: 16.9 inches in Boulder; 14.5 inches in Niwot; 12 inches in Lafayette and near Longmont; 10.5 inches in northwest Arvada, 10 inches in Erie and Louisville.

Winter Storm in C & S WELD COUNTY, COLORADO
From 15-APR-20 21:00:00 to 16-APR-20 17:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included: 13.5 inches in Frederick; 10 inches in Erie, 8 inches near Windsor;  7 inches in Brighton; 6 inches near Hudson, 5.5 inches in Greeley and 7 miles northwest of Purcell.

Winter Weather in WEST JACKSON & WEST GRAND COUNTIES ABOVE 9000 FEET, COLORADO
From 15-APR-20 18:00:00 to 16-APR-20 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals ranged from 3 to 8 inches.

Winter Weather in S & E JACKSON / LARIMER / N & NE GRAND / NW BOULDER COUNTIES ABOVE 9000 FEET, COLORADO
From 15-APR-20 18:00:00 to 16-APR-20 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Storm totals ranged from 5 to 8 inches.