During the day of February 4th light snow developed along a stationary front laying west to east across central Washington and into the Idaho Panhandle. This first wave of moisture brought with generally light snow accumulations, but this snow melted and subsequently froze on roadways causing multiple collisions along interstate 90 including a fatal crash near Ritzville.
A second wave of deeper moisture enhanced along this boundary during the evening and overnight hours and brought heavy accumulations to much of the Columbia Basin and the Palouse of eastern Washington by the morning of February 5th when accumulating snow snow began to  taper off. Snow accumulations of 4 to 6 inches were common near and along this stationary front, with lighter but still significant accumulations of 2 to 4 inches noted across northern Washington and the Cascades east slopes.

Heavy Snow in NORTHEAST BLUE MOUNTAINS, WASHINGTON
From 05-FEB-20 02:00:00 to 05-FEB-20 16:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The Bluewood ski resort reported 17 inches of new snow accumulation from this storm.

Heavy Snow in NORTHEAST BLUE MOUNTAINS, WASHINGTON
From 05-FEB-20 02:00:00 to 05-FEB-20 16:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public at the Spruce Springs Campground reported 10 inches of new snow accumulation from this storm.

Winter Storm in UPPER COLUMBIA BASIN, WASHINGTON
From 04-FEB-20 12:00:00 to 04-FEB-20 17:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple collisions and slide offs were reported along Interstate 90 in Adams County due to fresh light snow accumulations melting and subsequently freezing to the road surface. A fatal accident was reported from the Ritzville area.

Winter Weather in SPOKANE AREA, WASHINGTON
From 04-FEB-20 13:00:00 to 04-FEB-20 18:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple collisions and slide offs were reported along Interstate 90 in Spokane County due to light fresh snow accumulations melting and re-freezing to the road surface.

Heavy Snow in UPPER COLUMBIA BASIN, WASHINGTON
From 05-FEB-20 00:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Wilbur recorded 5.0 inches of new snow accumulation from this storm.

Heavy Snow in UPPER COLUMBIA BASIN, WASHINGTON
From 05-FEB-20 00:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Ritzville recorded 4.8 inches of new snow accumulation from this storm.

Heavy Snow in UPPER COLUMBIA BASIN, WASHINGTON
From 05-FEB-20 00:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Lind recorded 5.0 inches of new snow accumulation from this storm.

Heavy Snow in UPPER COLUMBIA BASIN, WASHINGTON
From 05-FEB-20 00:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Odessa recorded 5.0 inches of new snow accumulation from this storm.

Heavy Snow in UPPER COLUMBIA BASIN, WASHINGTON
From 05-FEB-20 00:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A weather spotter in Electric City reported 7.0 inches of new snow accumulation from this storm.

Heavy Snow in UPPER COLUMBIA BASIN, WASHINGTON
From 05-FEB-20 00:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A member of the public 1 mile northeast of Electric City reported an estimated 10.0  inches of new snow accumulation from this storm.

Heavy Snow in UPPER COLUMBIA BASIN, WASHINGTON
From 05-FEB-20 00:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 3 miles southeast of Grand Coulee recorded 5.2 inches of new snow accumulation from this storm.

Heavy Snow in UPPER COLUMBIA BASIN, WASHINGTON
From 05-FEB-20 00:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer in Ritzville recorded 5.0 inches of new snow accumulation from this storm.

Heavy Snow in WASHINGTON PALOUSE, WASHINGTON
From 05-FEB-20 02:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Rosalia recorded 4.4 inches of new snow accumulation from this storm.

Heavy Snow in WASHINGTON PALOUSE, WASHINGTON
From 05-FEB-20 02:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in LaCrosse recorded 4.5 inches of new snow accumulation from this storm.

Heavy Snow in WASHINGTON PALOUSE, WASHINGTON
From 05-FEB-20 02:00:00 to 05-FEB-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A member of the public in Colfax reported 4.0 inches of new snow accumulation from this storm.