A strong Pacific storm system interacted with a cold arctic airmass to bring widespread heavy snow to the forecast area between November 8 and 10, 2012. Impacts from this storm included traffic accidents, road/school closures and aviation delays. Towards the end of the storm, strong winds developed and caused blizzard conditions for areas along the Rocky Mountain Front and central Montana.

Heavy Snow in CASCADE, MONTANA
From 08-NOV-12 09:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

NWS Great Falls measures 24-hour snowfall of 9.9 inches. Storm total snowfall by 11am MST November 10 measured 15.8 inches.

Heavy Snow in NORTH ROCKY MOUNTAIN FRONT, MONTANA
From 08-NOV-12 08:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop Observer 1 mile NW of Heart Butte measures 24-hour snowfall of 17.0 inches.

Heavy Snow in EASTERN GLACIER, MONTANA
From 08-NOV-12 11:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer in Cut Bank measures 24-hour snowfall of 10.0 inches.

Heavy Snow in HILL, MONTANA
From 08-NOV-12 13:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter in Havre measures 24-hour snowfall of 8.5 inches.

Heavy Snow in CHOUTEAU, MONTANA
From 08-NOV-12 11:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter in Carter estimates 24-hour snowfall of 12.0 inches.

Heavy Snow in SOUTHERN LEWIS AND CLARK, MONTANA
From 08-NOV-12 06:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Helena Regional Airport measures 12-hour snowfall of 7.8 inches. Trained spotter in Helena estimates storm total snowfall of 14.0 inches.

Heavy Snow in MADISON, MONTANA
From 08-NOV-12 02:00:00 to 10-NOV-12 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Lone Mountain Snotel measures 24-hour snowfall of 14.0 inches. Albro Lake Snotel measures 24-hour snowfall of 12.0 inches.

Heavy Snow in TOOLE, MONTANA
From 08-NOV-12 13:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

KSEN radio station measures 24-hour snowfall of 9.5 inches.

Heavy Snow in LIBERTY, MONTANA
From 08-NOV-12 13:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter 21 miles NE of The Knees measures 24-hour snowfall of 8.0 inches.

Heavy Snow in EASTERN PONDERA, MONTANA
From 08-NOV-12 11:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

DES estimates 24-hour snowfall of 8.0 inches in Conrad.

Heavy Snow in BLAINE, MONTANA
From 08-NOV-12 12:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public measures 12-hour snowfall of 7.5 inches in the Hogeland/Turner area with 2 to 3 feet drifts. CoCoRaHS observer measures storm total snowfall of 14.5 inches 8 miles SSE of Hogeland.

Heavy Snow in SOUTHERN ROCKY MOUNTAIN FRONT, MONTANA
From 08-NOV-12 08:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Ham Radio operator reports 12-hour snowfall of 6.0 inches in Augusta. Mount Lockhart Snotel measures 12-hour snowfall of 10.0 inches at 0600 MST November 9, 2012.

Heavy Snow in EASTERN TETON, MONTANA
From 08-NOV-12 10:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter measures 24-hour snowfall of 8.5 inches 3 miles ENE of Dutton.

Heavy Snow in JUDITH BASIN, MONTANA
From 08-NOV-12 05:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Spur Park Snotel measures 24-hour snowfall of 14.0 inches. Elevation 8100 feet.

Heavy Snow in FERGUS, MONTANA
From 08-NOV-12 05:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer measures 24-hour snowfall of 10.0 inches 2 miles E of Buffalo.

Heavy Snow in JEFFERSON, MONTANA
From 08-NOV-12 04:00:00 to 10-NOV-12 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer measures 24-hour snowfall of 11.8 inches 2 miles SE of Montana City. Elevation 4850 feet.

Heavy Snow in BROADWATER, MONTANA
From 08-NOV-12 04:00:00 to 10-NOV-12 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Townsend COOP observer 1 mile NW of Townsend measures 12-hour snowfall of 8.0 inches.

Heavy Snow in MEAGHER, MONTANA
From 08-NOV-12 04:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

COOP observer 21 miles W of Neihart measures 24-hour snowfall of 12.0 inches. Elevation 5300 feet.

Heavy Snow in GALLATIN, MONTANA
From 08-NOV-12 02:00:00 to 10-NOV-12 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Bozeman airport measures 24-hour snowfall of 8.0 inches. Brackett Creek Snotel measures 24-hour snowfall of 14.0 inches at 0800 MST November 9, 2012 - Elevation 7320 feet.

Blizzard in CASCADE, MONTANA
From 09-NOV-12 05:00:00 to 09-NOV-12 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter 1 mile NNE of Simms reports blizzard with estimated wind speeds of 40 mph and 5.0 inches of snow.

Blizzard in EASTERN PONDERA, MONTANA
From 09-NOV-12 07:30:00 to 09-NOV-12 10:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter 5 miles E of Brady estimates 24-hour snowfall of 6.0 inches and 3-hour visibility of about one quarter of a mile. Drifts 2 to 3 feet deep.

Blizzard in EASTERN TETON, MONTANA
From 09-NOV-12 06:30:00 to 09-NOV-12 09:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter 8 miles WSW of Fairfield estimates 24-hour snowfall of 12.0 inches to 14.0 inches and wind speeds around 36 mph.

Heavy Snow in BEAVERHEAD, MONTANA
From 08-NOV-12 02:00:00 to 10-NOV-12 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Beagle Springs Snotel measures 12-hour snowfall of 8.0 inches. Elevation 8850 feet.