A significant early season snowstorm occurred across north central and northeast Colorado.  Storm totals ranged from 20 to 46 inches in the Front Range Mountains and Foothills, 12 to 26 inches across the Urban Corridor, and 4 to 12 inches over the Northeast Plains of Colorado.   The combination of a deep northeasterly upslope flow coupled with abundant moisture and lift with the developing storm system produced an extended period of moderate to heavy snowfall.  The heavy wet snowfall accumulated on trees and resulted in broken branches and scattered electrical outages.
Once the storm spread into the Northeast Plains, the strong winds gusting to 45 mph produced widespread blizzard conditions east of Denver.  Interstates 70 and 76 were closed east of Denver.  Numerous other roads and highways were shut down including State Highways 34 and 36.  The Red Cross set up numerous emergency shelters for stranded travelers.  The blowing snow at Denver International Airport forced the cancellation of hundreds of flights.   Schools throughout the region were also closed.

Blizzard in LOGAN COUNTY, COLORADO
From 29-OCT-09 13:00:00 to 30-OCT-09 05:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included 5 to 7 inches around Sterling.  North to northwest winds gusting up to 40 mph caused blowing and drifting snow.  The drifts were up to 3 feet in depth.

Blizzard in WASHINGTON COUNTY, COLORADO
From 29-OCT-09 13:00:00 to 30-OCT-09 05:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included 5 inches, 18 miles southwest of Fleming.  North to northwest winds gusted up to 48 mph at Akron Airport.

Winter Storm in LARIMER & BOULDER COUNTIES BETWEEN 6000 & 9000 FEET, COLORADO
From 27-OCT-09 23:00:00 to 29-OCT-09 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included:  15 inches at Rollinsville, 11 inches, 7 miles east-northeast of Virginia Dale, and 10 inches at Estes Park.

Winter Storm in S & E JACKSON / LARIMER / N & NE GRAND / NW BOULDER COUNTIES ABOVE 9000 FEET, COLORADO
From 27-OCT-09 23:00:00 to 29-OCT-09 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included:  25 inches at Deadman Hill, 18 inches at Roach SNOTEL, 12 inches at Bear Lake and 10 inches at Wild Basin and Willow Park.

Winter Storm in S & SE GRAND / W CENTRAL & SW BOULDER / GILPIN / CLEAR CREEK / SUMMIT / N & W PARK COUNTIES ABOVE 9000 FEET, COLORADO
From 27-OCT-09 23:00:00 to 29-OCT-09 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included:  21 inches at Rough and Tumble, 19 inches at Lake Eldora and Niwot Ridge SNOTEL, and 13 inches at Berthoud Pass.

Winter Storm in JEFFERSON & W DOUGLAS COUNTIES ABOVE 6000 FEET / GILPIN / CLEAR CREEK / NE PARK COUNTIES BELOW 9000 FEET, COLORADO
From 27-OCT-09 23:00:00 to 29-OCT-09 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included:   46 inches, 3 miles southeast of Pinecliffe; 42 inches, 3 miles southwest of Conifer; 34 inches, 3 miles north of Blackhawk; 30 inches at Aspen Springs and 1 mile south of Evergreen, 23 inches at Roxborough Park, and 20 inches, 3 miles south-southeast of Morrison.

Blizzard in MORGAN COUNTY, COLORADO
From 29-OCT-09 13:00:00 to 30-OCT-09 05:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included:  12 inches in Fort Morgan, 10 inches, 6 miles north-northeast of Woodrow; and 5 inches, 1 mile northwest of Fort Morgan.  North to northwest winds gusting up to 40 mph produced snow drifts up to 6 feet deep outside of Fort Morgan.

Blizzard in N & NE ELBERT COUNTY BELOW 6000 FEET / N LINCOLN COUNTY, COLORADO
From 29-OCT-09 13:00:00 to 29-OCT-09 23:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included:  13 inches in Agate and 6 inches, 7 miles west-southwest of Hugo, with 4 inches in Limon.  North to northwest winds gusting up to 44 mph reduced visibilities to less than a quarter mile at times.

Blizzard in SEDGWICK COUNTY, COLORADO
From 29-OCT-09 13:00:00 to 30-OCT-09 05:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals ranged from 1 to 3 inches.  North to northwest winds gusting to 40 mph reduced visibilities to less than a quarter of a mile.

Blizzard in PHILLIPS COUNTY, COLORADO
From 29-OCT-09 13:00:00 to 30-OCT-09 05:00:00 (MST-7)
Reported by: Trained Spotter

A storm spotter measured 6 inches of snow, 5 miles south of Sedgwick with 5 inches observed at Holyoke.  North to northwest winds gusting to 40 mph reduced visibilities to less than a quarter of a mile.

Winter Storm in N DOUGLAS COUNTY BELOW 6000 FEET / DENVER / W ADAMS & ARAPAHOE COUNTIES / E BROOMFIELD COUNTY, COLORADO
From 27-OCT-09 23:00:00 to 29-OCT-09 17:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included:   25 inches in Highlands Ranch, 17 inches in Westminster, 15 inches in Littleton, 14 inches in Englewood, 13.5 inches, 6 miles north of Thornton; 11 inches, 4 miles south of Denver; 10.5 inches, 2 miles north of Cherry Hills Village and 13.3 inches at Denver International Airport.

Winter Storm in C & S WELD COUNTY, COLORADO
From 27-OCT-09 23:00:00 to 29-OCT-09 23:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included 16.5 inches in Erie and 7.5 inches in Greeley.

Winter Storm in LARIMER COUNTY BELOW 6000 FEET / NW WELD COUNTY, COLORADO
From 27-OCT-09 23:00:00 to 29-OCT-09 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included 17.5 inches at C.S.U. in Fort Collins and 14.5 inches, 7 miles west-northwest of Loveland.

Winter Storm in BOULDER & JEFFERSON COUNTIES BELOW 6000 FEET / W BROOMFIELD COUNTY, COLORADO
From 27-OCT-09 23:00:00 to 29-OCT-09 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm totals included:   21.5 inches near Louisville, 20.5 inches at Broomfield, 20 inches at Lafayette, 17.5 inches in Boulder, 15.5 inches in Arvada and 5 miles west-northwest of Littleton, 13.5 inches in Lakewood and 10.5 inches in Niwot.

Winter Storm in C & E ADAMS & ARAPAHOE COUNTIES, COLORADO
From 28-OCT-09 05:00:00 to 29-OCT-09 13:00:00 (MST-7)
Reported by: Trained Spotter

Storm totals included 7.5 inches, 8 miles southeast of Watkins, and 6.5 inches, 2 miles west-southwest of Byers.

Blizzard in NE WELD COUNTY, COLORADO
From 29-OCT-09 13:00:00 to 29-OCT-09 23:00:00 (MST-7)
Reported by: Trained Spotter

A trained spotter 21 miles north of New Raymer reported 18 inches of snow.  Blowing snow to 35 mph reduced visibilities to less than 100 yards at times.