On December 19th a very moist surface low pressure tracked through eastern Washington and north Idaho along a slow moving warm front. The valleys of the Central Idaho Panhandle Mountains were mainly south of the front with mostly rain, although the Coeur D'Alene  area received 2 to 4 inches of heavy wet snow before changing to rain during the day as the warm front passed through and stalled just to the north. The mountains and valleys of north Idaho remained in the cold air mass north of the stalled front and received a prolonged period of heavy snow from this storm. The snow was wet and heavy in the valleys of north Idaho and caused numerous power outages across Bonner and Boundary Counties, with some customers without power for 24 hours. The higher terrain of the Central Idaho Panhandle Mountains also received heavy snow.

Heavy Snow in CENTRAL PANHANDLE MOUNTAINS, IDAHO
From 18-DEC-17 15:00:00 to 20-DEC-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Mullan reported 5.6 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Bayview reported 8.0 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Bonners Ferry reported 12.6 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Bonners Ferry reported 12.6 inches of new snow.

Heavy Snow in CENTRAL PANHANDLE MOUNTAINS, IDAHO
From 18-DEC-17 15:00:00 to 20-DEC-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Mullan reported 5.6 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Priest River reported 16.4 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Priest River reported 16.4 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 3 miles southeast of Bonners Ferry reported 17.6 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Hope reported 15.5 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Athol reported 9.9 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Naples reported 22.5 inches of new snow.

Heavy Snow in NORTHERN PANHANDLE, IDAHO
From 18-DEC-17 23:00:00 to 20-DEC-17 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter 4 miles northwest of Naples reported 21.0 inches of storm total snow.

Heavy Snow in CENTRAL PANHANDLE MOUNTAINS, IDAHO
From 18-DEC-17 15:00:00 to 20-DEC-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The Lookout Pass ski resort reported 35 inches of new snow from this storm. The nearby Silver Mountain ski resort reported 28 inches.