A strong upper level jetstream moved over northern Colorado and produced bands of very heavy snow.  The heaviest snowfall was concentrated along and north of the Interstate 70 Corridor and extended from the mountains and high valleys to the Urban Corridor and northeast plains of Colorado.  The snow fell at a rate of 2 to 3 inches per hour during the late afternoon and evening hours of the 15th and forced the cancellation of 25 flights at Denver International Airport.  Interstate 25 was closed in both directions between Wellington and Cheyenne due to snow and blowing snow.
In the mountain, high valley and foothill locations storm totals included:  21 inches near Estes Park; 18 inches at Bear Lake; 17 inches at Willow Park; 16 inches near Ward; 15.5 inches at Genesee; 15 inches at Grand Lake and near Nederland; 14.5 inches near Idaho Springs; 14 inches near Idledale; 13.5 inches in Bergen Park; 13 inches near Allenspark, Blackhawk, Conifer and 6 miles northwest of Lyons; 11.5 inches near Silverthorne.
Across the Urban Corridor and northeast plains, storm totals included:  16.5 inches, 5 miles east of Boulder; 16 inches, 5 miles northeast of Westminster; 15.5 inches in Lafayette; 15 inches in Frederick and Louisville; 14.5 inches in Broomfield;  13.5 inches at the National Weather Service Office in Boulder; 13 inches, 5 miles west-northwest of Brighton; 12.5 inches in Wheat Ridge; 12 inches near Arvada and Greeley; 11.5 inches near Loveland; 10 inches near Commerce City, Northglenn and Superior; 9 inches near Thornton; 7.5 inches at Denver International Airport; 7 inches near Crook; with 6 inches near Fort Collins and Fort Morgan.

Winter Storm in WEST JACKSON & WEST GRAND COUNTIES ABOVE 9000 FEET, COLORADO
From 15-APR-13 03:00:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in SEDGWICK COUNTY, COLORADO
From 15-APR-13 11:30:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in S & E JACKSON / LARIMER / N & NE GRAND / NW BOULDER COUNTIES ABOVE 9000 FEET, COLORADO
From 15-APR-13 03:00:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in S & SE GRAND / W CENTRAL & SW BOULDER / GILPIN / CLEAR CREEK / SUMMIT / N & W PARK COUNTIES ABOVE 9000 FEET, COLORADO
From 15-APR-13 20:00:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in LARIMER & BOULDER COUNTIES BETWEEN 6000 & 9000 FEET, COLORADO
From 15-APR-13 03:00:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in JEFFERSON & W DOUGLAS COUNTIES ABOVE 6000 FEET / GILPIN / CLEAR CREEK / NE PARK COUNTIES BELOW 9000 FEET, COLORADO
From 15-APR-13 20:00:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in LARIMER COUNTY BELOW 6000 FEET / NW WELD COUNTY, COLORADO
From 15-APR-13 07:00:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in BOULDER & JEFFERSON COUNTIES BELOW 6000 FEET / W BROOMFIELD COUNTY, COLORADO
From 15-APR-13 11:30:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in C & S WELD COUNTY, COLORADO
From 15-APR-13 11:30:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in N DOUGLAS COUNTY BELOW 6000 FEET / DENVER / W ADAMS & ARAPAHOE COUNTIES / E BROOMFIELD COUNTY, COLORADO
From 15-APR-13 18:00:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in NE WELD COUNTY, COLORADO
From 15-APR-13 07:00:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Winter Storm in MORGAN COUNTY, COLORADO
From 15-APR-13 11:30:00 to 16-APR-13 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL