During the afternoon of February 8th and into the morning of February 9th an atmospheric river of tropical origin moisture was directed into eastern Washington. Mild air with this moisture feed allowed snow levels to rise over the Columbia Basin. South of Interstate 90 generally rain fell. North of Interstate 90 the rain fell into a layer of cold air trapped near the surface promoting a prolonged period of freezing rain during the night of February 8th. Ice accumulation on area roads paralyzed travel in the Columbia Basin and the southern valleys of the northeast Washington mountains with over 70 schools closed or delayed on the morning of February 9th and numerous auto accidents. The mountains of eastern Washington and the valleys tucked against the Cascades experienced mainly  heavy snow accumulations with this storm.

Heavy Snow in OKANOGAN VALLEY, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 03:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Tonasket reported 4 inches of snow.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 4 miles north of Republic reported 4.2 inches of new snow.

Heavy Snow in WENATCHEE AREA, WASHINGTON
From 08-FEB-17 10:00:00 to 09-FEB-17 04:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Two CoCoRaHs observers in Wenatchee reported 4.3 inches and 4.0 inches of new snow.

Heavy Snow in OKANOGAN VALLEY, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 03:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer in Okanogan reported 4 inches of snow.

Winter Storm in WATERVILLE PLATEAU, WASHINGTON
From 08-FEB-17 09:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer in Waterville reported 3 inches of new snow and freezing rain.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 7 miles north of Republic reported 4.4 inches of new snow.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 08-FEB-17 08:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer in Holden Village reported 19 inches of new snow.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 08-FEB-17 08:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer in Plain reported 8.8 inches of new snow.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 08-FEB-17 08:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer near Stehekin reported 19 inches of new snow.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 08-FEB-17 08:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Plain reported 14 inches of new snow.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 08-FEB-17 08:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Peshastin reported 7.6 inches of new snow.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 08-FEB-17 08:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 12 miles northwest of Entiat reported 9.7 inches of new snow.

Heavy Snow in WENATCHEE AREA, WASHINGTON
From 08-FEB-17 10:00:00 to 09-FEB-17 04:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer in Chelan reported 6 inches of new snow.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Northport reported 6 inches of new snow.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 8 miles north of Nine Mile Falls reported 5.2 inches of new snow accumulation.

Winter Storm in NORTHEAST MOUNTAINS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer in Deer Park reported 2.7 inches of new snow and another observer reported 0.10 inch if ice from freezing rain in Deer Park.

Ice Storm in MOSES LAKE AREA, WASHINGTON
From 08-FEB-17 10:00:00 to 09-FEB-17 03:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Freezing rain deposited 0.26 inch of ice accumulation at the Grant County International Airport.

Ice Storm in SPOKANE AREA, WASHINGTON
From 08-FEB-17 19:00:00 to 09-FEB-17 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Freezing rain deposited 0.25 inch of glaze ice at Colbert from freezing rain.

Ice Storm in MOSES LAKE AREA, WASHINGTON
From 08-FEB-17 10:00:00 to 09-FEB-17 03:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Freezing rain deposited 0.25 inch of glaze ice in Moses Lake.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported 6.5 inches of new snow accumulation near Chesaw.

Ice Storm in UPPER COLUMBIA BASIN, WASHINGTON
From 08-FEB-17 11:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Freezing rain deposited 0.18 inch of glaze ice at Ritzville.

Ice Storm in UPPER COLUMBIA BASIN, WASHINGTON
From 08-FEB-17 11:00:00 to 09-FEB-17 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A spotter near Davenport reported 3.2 inches of snow with a thick layer of ice on the snow.

Ice Storm in SPOKANE AREA, WASHINGTON
From 08-FEB-17 14:00:00 to 09-FEB-17 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer in north Spokane reported 3 inches of snow with 1 inch of Ice accumulation from freezing rain. The snow occurred first then the freezing rain fell overnight.

Winter Storm in UPPER COLUMBIA BASIN, WASHINGTON
From 08-FEB-17 10:00:00 to 09-FEB-17 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Grand Coulee reported 2.7 inches of new snow mixed with freezing rain ice accumulation.

Ice Storm in SPOKANE AREA, WASHINGTON
From 08-FEB-17 19:00:00 to 09-FEB-17 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The observer at the NWS office in Spokane measured 0.25 inch of ice accumulation from freezing rain.

Ice Storm in SPOKANE AREA, WASHINGTON
From 08-FEB-17 19:00:00 to 09-FEB-17 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An employee of the NWS office in Spokane measured 0.25 inch of ice accumulation from freezing rain at his home near Marshall.

Ice Storm in SPOKANE AREA, WASHINGTON
From 08-FEB-17 20:00:00 to 09-FEB-17 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The observer at the Spokane International Airport reported 0.27 inch of ice accumulation from freezing rain which fell overnight into the early morning of February 9th.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 8 miles north of Republic reported 4.5 inches of new snow.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer in Republic reported 4 inches of new snow.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Boyds reported 5.6 inches of new snow.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Evans reported 5.5 inches of new snow.

Winter Storm in NORTHEAST MOUNTAINS, WASHINGTON
From 08-FEB-17 12:00:00 to 09-FEB-17 04:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter in Metaline Falls reported 6 inches of new snow along with 0.10 inch ice accumulation from freezing rain.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 08-FEB-17 13:00:00 to 09-FEB-17 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 8 miles south of Northport reported 6 inches of new snow.