National Weather Service United States Department of Commerce

Active Weather Continues in the West; Potent Cold Front to Move Through the East this Weekend

A complex weather system will continue to bring active conditions over the Western U.S. through early Saturday, including more heavy snowfall through the Rockies. Farther east, a potent cold front will advance through the Ohio Valley Saturday, bringing rain and a few strong thunderstorms. As the front clears the east coast on Sunday, colder and gusty conditions will return. Read More >

Click a location below for detailed forecast.

Last Map Update: Sat, Nov. 18, 2017 at 4:31:12 am MST

National Weather Service Spokane, WAZoom
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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.
Next weather system of concern will be on Monday as a moist weather system swings through the Northern Rockies. Snow levels will be around 4000 feet and all mountain passes will likely see snow. The heaviest snow will be along the MT/ID border Sunday night through Monday morning. After the Monday weather system, there is a lot of uncertainty on how much the skies will clear Monday night to set up fog for Tuesday morning. For rest of the week, a warm atmospheric river will be setting up which will bring rising snow levels and moderate to heavy rain across the region. Overall, the main travel issues right around Thanksgiving looks to be visibility issues from rain and possibly some high elevation pass snow for passes above 7000 feet.

 

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