A prolonged period of northwest flow over the Pacific Northwest guided several rounds of moisture advection across the mountain zones, leading to upslope moderate to heavy snow showers nearly each day. Meanwhile, surface frontal systems and a series of shortwave troughs in the flow aloft produced moderate to heavy snow as well as some periods of freezing rain across the lower elevations. Strong winds were also produced as a result of these shortwave troughs and surface frontal systems at the beginning and end of the prolonged winter weather conditions. During this extended period of winter weather, the I-84 and several state and US highways in Oregon and Washington closed for extended periods of time due to increased traffic accidents from ice and/or moderate to heavy snow accumulations on roadways.

Heavy Snow in EAST SLOPES OF THE WASHINGTON CASCADES, WASHINGTON
From 02-JAN-22 16:00:00 to 03-JAN-22 16:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A Cocorahs observer 17 miles NW of Roslyn, WA measured 17 inches of new snow in a 24 hour period ending at 0700 PST on Jan. 3rd. A public report indicated 12 inches of new snow had fallen 12 miles NW of Tieton, WA at 1000 PST on Jan. 3rd.

Heavy Snow in YAKIMA VALLEY, WASHINGTON
From 02-JAN-22 16:00:00 to 03-JAN-22 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A Cocorahs observer 2 miles ENE of West Valley, WA measured 7.4 inches of new snow in a 24 hour period ending at 0700 PST on Jan. 3rd. A trained spotter 3 miles E of Selah measured 5 inches of new snow at 1000 PST on Jan. 3rd.

Heavy Snow in EASTERN COLUMBIA RIVER GORGE, WASHINGTON
From 02-JAN-22 16:00:00 to 03-JAN-22 16:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

The Cocorahs observer WA-KL-16 1 mile NW of White Salmon, WA measured 15 inches of new snow at 0700 PST on Jan. 3rd.

Heavy Snow in EASTERN COLUMBIA RIVER GORGE, WASHINGTON
From 03-JAN-22 17:00:00 to 05-JAN-22 09:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

The Cocorahs observer WA-KL-6 near White Salmon, WA measured 7 inches of new snow at 0700 PST on Jan. 4th.

Heavy Snow in SIMCOE HIGHLANDS, WASHINGTON
From 02-JAN-22 16:00:00 to 03-JAN-22 16:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter 10 miles NE of Goldendale, WA measured 11 inches of new snow in a 24 hour period ending at 1600 PST on Jan. 3rd. A trained spotter 16 miles WSW of Goldendale, WA measured 7 inches of new snow in a 24 hour period ending at 1600 PST on Jan. 3rd.

Heavy Snow in EASTERN COLUMBIA RIVER GORGE, WASHINGTON
From 05-JAN-22 22:00:00 to 06-JAN-22 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A Cocorahs observer 1 mile WNW of White Salmon, WA measured 7 inches of new snow at 0700 PST on Jan. 6th.

Heavy Snow in NORTHWEST BLUE MOUNTAINS, WASHINGTON
From 04-JAN-22 14:43:00 to 06-JAN-22 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The Ski Bluewood ski area 18 miles SSE of Dayton, WA measured 14 inches of new snow in a 24 hour period ending at 0446 PST on Jan. 5th.

Heavy Snow in EAST SLOPES OF THE WASHINGTON CASCADES, WASHINGTON
From 05-JAN-22 13:00:00 to 07-JAN-22 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Co-op observer at the Easton Dam in NW Easton measured 27 inches of new snow in a 24 hour period ending at 0800 PST on Jan. 6th. The Cocorahs observer WA-KT-7 8.9 miles E of Cle Elum, WA measured 18.5 inches of new snow at 0700 PST on Jan. 6th.

Heavy Snow in KITTITAS VALLEY, WASHINGTON
From 05-JAN-22 13:00:00 to 06-JAN-22 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A media partner indicated 15 inches of new snow had accumulated 5 miles WSW of Ellensburg, WA at 0652 PST on Jan. 6th. A public report indicated 18 inches of new snow had accumulated 1 mile ENE of Ellensburg, WA at 0730 PST on Jan. 6th.

Heavy Snow in YAKIMA VALLEY, WASHINGTON
From 05-JAN-22 13:00:00 to 06-JAN-22 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Co-op observer SNNW1 at Sunnyside, WA measured 6 inches of new snow at 0730 PST on Jan. 6th. A trained spotter 3 miles E of Selah, WA measured 13 inches of new snow at 0814 PST on Jan. 6th.

Heavy Snow in LOWER COLUMBIA BASIN, WASHINGTON
From 05-JAN-22 19:00:00 to 06-JAN-22 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A social media report indicated 6 inches of new snow accumulated in Benton City, WA at 0730 PST on Jan. 6th. A Cocorahs observer 3 miles SSW of Richland, WA measured 7.5 inches of new snow at 0700 PST on Jan. 6th.

High Wind in SIMCOE HIGHLANDS, WASHINGTON
From 07-JAN-22 07:00:00 to 07-JAN-22 21:00:00 (PST-8)
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The mesonet station AV493 Maryhill 8 miles SSE of Goldendale, WA measured a 75 mph wind gust at 1016 PST on Jan. 7th. The mesonet station FW8280 Lyle 14 miles ENE of Bingen, WA measured a 61 mph wind gust at 0930 PST on Jan. 7th.

High Wind in EASTERN COLUMBIA RIVER GORGE, WASHINGTON
From 07-JAN-22 07:00:00 to 07-JAN-22 21:00:00 (PST-8)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The mesonet station XLOR Loroc Island Light 27 27 miles S of Mabton, WA measured a 61 mph wind gust at 1151 PST on Jan. 7th.

High Wind in LOWER COLUMBIA BASIN, WASHINGTON
From 07-JAN-22 05:00:00 to 07-JAN-22 21:00:00 (PST-8)
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The mesonet station HWYEB 10.9 N West Richland measured a 80 mph wind gust at 0500 PST on Jan. 7th. The ASOS KPSC measured a 59 mph wind gust at 1435 PST on Jan. 7th.