The seasons first arctic outbreak and combined winter storm moved into the Billings Forecast Area during the first week of December. Mild temperatures ended the month of November and continued through the morning of the 2nd. A strong disturbance moved across the area during the afternoon of the 2nd. This disturbance combined with temperatures around 50 degrees for most of the day, resulted in a period of light to moderate rain for a few hours. An arctic front moved into the area by late in the afternoon turning the rain to snow. Temperatures quickly dropped into the teens and single digits during the overnight hours. The initial wet snow that fell onto already wet pavement from the rain quickly froze which resulted in very icy road conditions. The snow, which was heavy at times, continued through the 3rd before ending on the 4th of December.  However, bitterly cold temperatures continued through the 8th with daytime highs only in the single digits above and below zero with overnight lows in the teens below to 30s below zero.

Winter Storm in TREASURE, MONTANA
From 02-DEC-13 18:00:00 to 03-DEC-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 5 to 7 inches along with blowing snow and icy roads was reported across the county.

Winter Storm in CRAZY MOUNTAINS, MONTANA
From 01-DEC-13 12:00:00 to 03-DEC-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Snowfall of 12 inches was reported at the South Fork Shields Snotel.

Winter Storm in MUSSELSHELL, MONTANA
From 02-DEC-13 17:00:00 to 04-DEC-13 02:47:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 8 to 12 inches was reported across the Bull Mountains.

Winter Storm in NORTHERN ROSEBUD, MONTANA
From 02-DEC-13 18:00:00 to 03-DEC-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 6 to 12 inches along with blowing snow and icy roads was reported across the area.

Winter Storm in CUSTER, MONTANA
From 02-DEC-13 18:00:00 to 03-DEC-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 6 to 10 inches along with blowing snow and icy roads was reported across the county.

Winter Storm in FALLON, MONTANA
From 02-DEC-13 17:00:00 to 03-DEC-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 6 to 10 inches along with blowing snow and icy roads was reported.

Winter Storm in RED LODGE FOOTHILLS, MONTANA
From 02-DEC-13 16:00:00 to 03-DEC-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 12 to 18 inches was reported across the area.

Winter Storm in ABSAROKEE / BEARTOOTH MOUNTAINS, MONTANA
From 01-DEC-13 22:00:00 to 03-DEC-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Snowfall of 12 to 18 inches was reported at area Snotels.

Winter Storm in POWDER RIVER, MONTANA
From 02-DEC-13 17:00:00 to 03-DEC-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 6 to 12 inches along with blowing snow and icy roads was reported.

Winter Storm in CARTER, MONTANA
From 02-DEC-13 19:00:00 to 03-DEC-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 5 to 8 inches along with blowing snow and icy roads was reported across the county.

Winter Storm in BEARTOOTH FOOTHILLS, MONTANA
From 02-DEC-13 15:00:00 to 03-DEC-13 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 10 to 16 inches was reported across the area.

Winter Storm in EASTERN CARBON, MONTANA
From 02-DEC-13 17:00:00 to 03-DEC-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 12 to 18 inches was common across the area.

Winter Storm in NORTHERN STILLWATER, MONTANA
From 02-DEC-13 16:00:00 to 03-DEC-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 6 to 12 inches was common across the area.

Winter Storm in SOUTHERN ROSEBUD, MONTANA
From 02-DEC-13 19:00:00 to 04-DEC-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway 212 required chains by the DOT.

Winter Storm in NORTHERN BIG HORN, MONTANA
From 02-DEC-13 18:00:00 to 03-DEC-13 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 4 to 8 inches was reported along with blowing snow and icy roads.

Winter Storm in SOUTHERN BIG HORN, MONTANA
From 02-DEC-13 19:00:00 to 03-DEC-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 6 to 8 inches was reported. Winds gusted over 40 mph resulting in considerable blowing snow. Schools were closed.

Winter Storm in YELLOWSTONE, MONTANA
From 02-DEC-13 16:00:00 to 03-DEC-13 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall of 6 to 12 inches was reported, along with blowing snow, icy roads and numerous accidents.