A wet and vigorous low pressure system brought snow and strong winds across much Eastern Washington on the evening of November 12th into November 13th. The heaviest snowfall was near the Cascade Crest with 1 to 2 feet reported. Numerous locations in the northern mountains and mountain valleys received up to one foot. The heavy, wet snow impacted morning commutes and led to numerous school district closures on the 13th. There were many accidents on I-90 and state highways, especially through the Spokane - Coeur d'Alene corridor due to slushy, melting snow. The snow was followed by strong winds in the afternoon and evening, with gusts reaching 45-60 mph across the Palouse and parts of the Columbia Basin.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 12-NOV-20 22:00:00 to 13-NOV-20 10:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public in Orin reported 12.0 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 12-NOV-20 20:00:00 to 13-NOV-20 12:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public in Inchelium reported 12.0 inches of new snow accumulation.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 13-NOV-20 07:00:00 to 14-NOV-20 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer in Mazama recorded 10.8 inches of new snow accumulation.

Winter Weather in NORTHEAST MOUNTAINS, WASHINGTON
From 12-NOV-20 22:00:00 to 13-NOV-20 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Local utility companies reported 8,586 customers without power, mainly in Colville and northeast Washington, due to snow laden trees and branches falling onto power lines.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 13-NOV-20 00:00:00 to 14-NOV-20 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Washington Department of Transportation recorded 25 inches of 48 hour new snow accumulation at Stevens Pass.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 13-NOV-20 00:00:00 to 14-NOV-20 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Washington Department of Transportation recorded 10 inches of 48 hour new snow accumulation at Blewett Pass.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 12-NOV-20 19:00:00 to 14-NOV-20 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer, 8 miles west of Lucerne, recorded 18.8 inches of new snow accumulation.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 12-NOV-20 19:00:00 to 13-NOV-20 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public in Holden Village reported 12.8 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 12-NOV-20 22:00:00 to 13-NOV-20 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer, 4 miles north of Republic, recorded 6.0 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 13-NOV-20 00:00:00 to 13-NOV-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public, 4 miles west-southwest of Chesaw, reported 8.0 inches of new snow accumulation.

Heavy Snow in OKANOGAN VALLEY, WASHINGTON
From 13-NOV-20 00:00:00 to 13-NOV-20 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public in Tonasket reported 6.0 inches of new snow accumulation.

Heavy Snow in OKANOGAN VALLEY, WASHINGTON
From 13-NOV-20 00:00:00 to 13-NOV-20 10:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter, 7 miles west-northwest of Malott, recorded 7.0 inches of new snow accumulation.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 12-NOV-20 22:00:00 to 13-NOV-20 12:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public in Carrs Corner reported 15.0 inches of new snow accumulation.

Winter Weather in SPOKANE AREA, WASHINGTON
From 13-NOV-20 09:00:00 to 13-NOV-20 09:26:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Interstate 90, at the interchange with U.S. Highway 2, was briefly closed in both directions due to an active, snow laden power line that fell across the road.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 13-NOV-20 01:15:00 to 13-NOV-20 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public, 5 miles north-northeast of Deer Park, reported 8.0 inches of new snow accumulation.

Heavy Snow in SPOKANE AREA, WASHINGTON
From 13-NOV-20 07:00:00 to 14-NOV-20 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer, 14 miles northwest of Spokane, recorded 7.3 inches of new snow accumulation.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 12-NOV-20 22:00:00 to 13-NOV-20 12:55:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public in Cusick reported 12.0 inches of new snow accumulation.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 12-NOV-20 22:00:00 to 13-NOV-20 11:41:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter, 6 miles northwest of Diamond Lake, recorded 10.7 inches of new snow accumulation.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 12-NOV-20 22:00:00 to 14-NOV-20 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A CO-OP observer station, 9 miles north of Metaline Falls, recorded 7.0 inches of new snow accumulation.

High Wind in OKANOGAN VALLEY, WASHINGTON
From 13-NOV-20 17:25:00 to 13-NOV-20 17:30:00 (PST-8)
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported roof shingles blown off and tree limbs down due to strong winds. Wind gust speed was estimated based on damage and local wind speeds.

Winter Weather in SPOKANE AREA, WASHINGTON
From 13-NOV-20 01:00:00 to 13-NOV-20 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Light snow fell overnight with temperatures above freezing.  Reports in the Spokane area ranged from 1 to 3 inches on grassy surfaces.  There was a report of 7.3 inches of snow fall in the northwest corner of Spokane county.  At the U.S. Highway 2 interchange, Interstate 90 was closed briefly for a snow laden power line that fell across the road.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 12-NOV-20 18:00:00 to 13-NOV-20 14:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell in the Cascades with 10 inches reported by the DOT at Blewett Pass and 25 inches at Stevens Pass. 10.8 inches fell near Mazama, 18.8 inches west of Lucerne, and 12.8 inches at Holden Village.  There were reports of 7 inches in the Wenatchee River Valley.

Winter Weather in OKANOGAN VALLEY, WASHINGTON
From 12-NOV-20 20:00:00 to 13-NOV-20 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Light snow fell overnight, but temperatures remained above freezing and limited accumulations. The Highway 97 corridor saw 1 to 2 inches of snow.  A few outlying locations east of Tonasket picked up 3 to 5 inches of snow. An observer outside of Malott received 7 inches of snow.

High Wind in MOSES LAKE AREA, WASHINGTON
From 13-NOV-20 13:55:00 to 13-NOV-20 15:00:00 (PST-8)
Magnitude: 36.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a semi-truck rollover on State Route 243. Roadway was closed due to frozen fruit on the roadway.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 12-NOV-20 19:00:00 to 13-NOV-20 13:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall reports included 12 inches in Inchelium,  7 inches north of Republic, 4.6 inches east of Tonasket and 8 inches southwest of Chesaw.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 13-NOV-20 00:00:00 to 13-NOV-20 13:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread heavy snowfall reports included 12 inches at Cusick and Orin, 10.7 inches near Diamond Lake, 9.4 inches at Clayton, 8 inches northeast of Deer Park, 7 inches at Metaline Falls and Newport.  The heaviest snowfall report was 15 inches at Carrs Corner.  Local utility companies reported 8,586 customers without power, mainly in Colville, due to snow laden trees and branches falling on power lines.