A cold air mass moved south out of Canada and combined with a powerful storm system that moved in from the Pacific Northwest Coast. This resulted in periods of heavy snow across portions of the Billings Forecast Area.  In addition, a freezing drizzle/snow mix occurred across the eastern portions of the area resulting in numerous vehicle slide offs.

Winter Storm in CUSTER, MONTANA
From 09-NOV-12 18:00:00 to 10-NOV-12 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A mixture of sleet and snow, accumulating to 7-9 inches, resulted in numerous slide offs.

Winter Storm in SOUTHERN ROSEBUD, MONTANA
From 09-NOV-12 16:00:00 to 10-NOV-12 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow accumulations of 10-11 inches were reported across the area.

Winter Storm in MUSSELSHELL, MONTANA
From 09-NOV-12 05:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The Bull Mountains received around 7 inches of snow.

Winter Storm in SOUTHERN BIG HORN, MONTANA
From 09-NOV-12 16:00:00 to 10-NOV-12 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow amounts of 5-9 inches were common across the area.

Winter Storm in NORTHERN STILLWATER, MONTANA
From 09-NOV-12 05:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow amounts of 6-8 inches were reported from Columbus to Absarokee.

Winter Storm in RED LODGE FOOTHILLS, MONTANA
From 09-NOV-12 05:00:00 to 10-NOV-12 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow accumulations around 7-8 inches were reported in Red Lodge.

Winter Storm in CRAZY MOUNTAINS, MONTANA
From 08-NOV-12 05:00:00 to 10-NOV-12 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

South Fork Shields Snotel reported 15 inches of new snow.

Winter Storm in JUDITH GAP, MONTANA
From 08-NOV-12 05:00:00 to 10-NOV-12 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall around 6 inches along with 30 to 40 mph winds resulted in significant blowing and drifting snow.

Winter Storm in SOUTHERN WHEATLAND, 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: Trained Spotter

Snowfall amounts from 10-12 inches were reported from Harlowton to Two Dot.

Winter Storm in NORTHERN SWEET GRASS, 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: Trained Spotter

The east side of the Crazy Mountains received 12-14 inches of snow.

Winter Storm in NORTHERN PARK COUNTY, 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

Snowfall around 7-13 inches was reported from Livingston to Wilsall.

Winter Storm in LIVINGSTON AREA, MONTANA
From 08-NOV-12 21:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 7-13 inches was reported from Livingston to Wilsall.

Winter Storm in PARADISE VALLEY, MONTANA
From 08-NOV-12 21:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of around 9 inches was received at Pine Creek and Emigrant.

Winter Storm in ABSAROKEE / BEARTOOTH MOUNTAINS, MONTANA
From 08-NOV-12 16:00:00 to 10-NOV-12 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Placer Basin Snotel received 13 inches of snow.

Winter Storm in POWDER RIVER, MONTANA
From 09-NOV-12 18:00:00 to 10-NOV-12 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow accumulations of 7-9 inches were reported in the Volborg and Ashland areas.