National Weather Service United States Department of Commerce

Atmospheric River in the Pacific Northwest and Northwest California Early This Week

An atmospheric river event will bring heavy rains and rising snow levels to the Pacific Northwest and northwest California early this week. Snow levels will rise above 8,000 feet, and 4 to 7 inches of rain is forecast for the southwest facing slopes of the mountains. Minor river and localized flooding will be possible. In the east, winds decrease by Monday, and the week will be relatively dry. Read More >

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Last Map Update: Sun, Nov. 19, 2017 at 12:57:14 pm MST

National Weather Service Spokane, WAZoom

National Weather Service Great Falls, MT
National Weather Service Pendleton, ORNational Weather Service Boise, IDNational Weather Service Pocatello, ID

Accumulating snow will return late Sunday evening and continue into Monday for mountain passes. The main focus for accumulations will be on Monday morning with several inches of accumulation, especially over Lookout, Lolo, Marias, and Lost Trail passes. Slick roadways and reduced visibility will be common. Valleys are expected to see a rain or a rain/snow mix with limited impacts.


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