Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

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Last Map Update: Tue, Dec 9, 2025 at 2:08:41 am PST

Watches, Warnings & Advisories

National Weather Service Seattle/Tacoma, WA

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Flood Warning

Flood Advisory

Wind Advisory

Flood Watch

Special Weather Statement

Hydrologic Outlook

Breezy to Locally Windy Monday and Early Tuesday

River Flooding Expected This Week

Much like this past Friday night, a cold front and strong winds aloft will move over the region Monday afternoon and produce breezy to windy conditions through Tuesday morning. The strongest winds are expected to impact North Central Oregon, the Simcoe Highlands, the Eastern Gorge, Yakima valley, The Columbia Basin, and the the Blue Mountain Foothills. Winds of 25-35 mph, with gusts 45-55 mph will develop much of these areas, with stronger gusts along exposed ridges(70-85% confidence).

With a combination of an abundance of rain over the next several days and warmer temperatures melting snow in the mountains, a number of rivers are expected to at least reach Minor and Moderate stage this week. Many rivers are expected to peak Wednesday through Thursday, with a few exceptions like Yakima at Kiona continuing to peak through Saturday. Practice safe driving habits if encountering a flooded road and remember the saying, "turn around and don't drown!" For more complete information, please visit the website for the Pendleton Weather Forecast Office: https://www.weather.gov/pdt/

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Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

NWS Forecast Office Pendleton, OR