As a strong cold front moved south out of Canada, low level convergence along the front produced areas of heavy snow. Snow accumulations in excess of 8 inches were reported.

Winter Storm in SOUTHERN LEWIS AND CLARK, MONTANA
From 13-DEC-15 20:00:00 to 14-DEC-15 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An estimated 10 inches of snow fell at Helena 11W. Additionally, 9 inches of snow fell at Helena 2SW.

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

Nine inches of snow fell at Stanford.

Winter Storm in BEAVERHEAD, MONTANA
From 13-DEC-15 14:00:00 to 14-DEC-15 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Severe driving conditions reported along I-15 from Glen to Feeley Hill.

Winter Storm in BROADWATER, MONTANA
From 13-DEC-15 14:00:00 to 14-DEC-15 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Three Forks School District reported that the Clarkston Bus Route would not be running due to unsafe road conditions. MDOT reporting hazardous travel conditions due to snow-covered and icy roads along US-287 near Townsend.

Winter Storm in MEAGHER, MONTANA
From 13-DEC-15 20:00:00 to 15-DEC-15 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Hazardous travel conditions due to snow-covered and icy roads along with low visibility in blowing snow, especially over Kings Hill Pass.

Winter Storm in MADISON, MONTANA
From 13-DEC-15 14:00:00 to 14-DEC-15 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Nine inches of snow fell at Pony 5SW. Also, 6 inches fell at Ennis.

Winter Storm in CHOUTEAU, MONTANA
From 13-DEC-15 14:00:00 to 14-DEC-15 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Hazardous travel conditions due to snow-covered and icy roads along with significant blowing and drifting snow near Denton. Great Falls Tribune was unable to be delivered to Raynesford, Geyser, Denton, Moore and Lewistown.

Winter Storm in FERGUS, MONTANA
From 13-DEC-15 20:00:00 to 15-DEC-15 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Six inches of snow fell at Garneill 12 ENE (the Crystal Lake SNOTEL site). Also, 7 inches fell at Grass Range.

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

Eleven inches of snow fell at Montana City 2SE. Also, 15 inches fell at Clancy 3W.

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

Six inches of snow fell at Ulm 8SE. Also, 15 inches fell at Belt 9SW and 9 inches fell at Neihart.

Winter Storm in GALLATIN, MONTANA
From 13-DEC-15 14:00:00 to 15-DEC-15 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Eight inches of snow fell at Big Sky 1NNE. Also, 7 inches fell at Bozeman 5W and 10 inches fell at Bozeman 1S.