BOISE, Idaho — WHAT: A major fall system is on the way for the Northwest this weekend . An upper-level area of low pressure off the Gulf of Alaska will send a series of smaller storm waves across the region.

This setup could likely tap into an atmospheric river, a plume of moisture from the Pacific, bringing widespread valley rain and possibly heavy mountain snow from late Friday, Oct. 24, through early Monday, Oct. 27.

The weekend of Oct. 25-26 will be wet and brisk. This will be an abrupt change to the weather pattern coming off the prior work week of dry and calm conditions.

WHERE: The system will impact much of the region, moving west to east across the Pacific Northwest and into Idaho.

Lower valleys, including the Treasure Valley and Magic Valley, will see primarily rain, a

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