Beginning during the evening of the 28th of February and continuing through the 1st of March  a slow moving frontal band brought an extended period of wet snow to the Cascades, The Okanogan Highlands and the Northeast Mountains and the higher terrain above the western Columbia and the Okanogan River valleys. The accumulating snow was very elevation dependent with only a few hundred feet elevation making the difference between little or no accumulation and accumulations of upwards of a foot of very wet heavy snow. In the lower valleys mostly rain fell, and the saturated ground triggered a local debris flow near Omak.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 01-MAR-18 00:00:00 to 02-MAR-18 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public 6 miles west of Orin reported 9 inches of new snow accumulation.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 01-MAR-18 00:00:00 to 02-MAR-18 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Clayton reported 4.8 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer at Republic recorded 14.0 inches of new snow accumulation.

Heavy Snow in NORTHEAST MOUNTAINS, WASHINGTON
From 01-MAR-18 00:00:00 to 02-MAR-18 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The 49 North ski resort reported a storm total snow accumulation of 34.0 inches.

Debris Flow in OKANOGAN, WASHINGTON
From 02-MAR-18 17:45:00 to 03-MAR-18 07:00:00 (PST-8)
Location: (4OM)OMAK ARPT
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Department of Highways

A debris flow caused by heavy rain on a saturated hillside blocked the Omak River Road one mile south of the intersection with State Route 97.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 13:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Holden Village recorded 16.0 inches of new snow accumulation from the evening of February 28th through the morning of March 2nd when precipitation tapered off.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 13:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An observer at Mazama recorded 4.7 inches of new snow accumulation.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 13:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer at Winthrop reported 7.0 inches of new snow accumulation.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 01-MAR-18 00:00:00 to 02-MAR-18 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A member of the public 6 miles northeast of Conconully reported 18.0 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A member of the public near Chesaw reported 6.0 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Boyds reported 17.0 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer near Aeneas reported 8.2 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 7 miles east of Tonasket reported 5.5 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 4 miles north of Republic reported 16.5 inches of new snow accumulation.

Heavy Snow in OKANOGAN HIGHLANDS, WASHINGTON
From 01-MAR-18 00:00:00 to 01-MAR-18 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer 8 miles north of Republic reported 14.2 inches of new snow accumulation.

Heavy Snow in EAST SLOPES NORTHERN CASCADES, WASHINGTON
From 01-MAR-18 00:00:00 to 02-MAR-18 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Salmon Meadows SNOTEL site reported 21.0 inches of new snow accumulation from this storm system.

Heavy Snow in OKANOGAN VALLEY, WASHINGTON
From 01-MAR-18 00:00:00 to 02-MAR-18 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public 6 miles south of Okanogan reported 12.0 inches of new snow accumulation.

Heavy Snow in OKANOGAN VALLEY, WASHINGTON
From 01-MAR-18 00:00:00 to 02-MAR-18 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter on the heights above the Okanogan River 3 miles southeast of Malott reported 26.0 inches of new snow accumulation.