After last week's record river flooding in Washington state, more atmospheric rivers are taking aim at the West Coast this week, set to bring heavy rain, mountain snow to Oregon and California, too.

Oregon is in for several days of heavy rain, strong winds and rising rivers as two atmospheric river surges push across the state through midweek.

The last weather system caused a landslide that closed Highway 229 closed indefinitely. Here's what's coming next.

November was a somewhat dry month for Portland at just 4.67 inches. During an average November, the airport gets about 5.55 inches of rain. For comparison, during an average December, the airport gets about 5.77 inches of precipitation. Atmospheric river shifts northward. Wednesday brings Portland lighter rain, gusty winds Dec. 10, 2025, 5:42 a.m.

Some rivers may break records. Already, overnight into Tuesday, the Naselle River near Naselle, Washington, has gone from its normal 5 foot depth to nearly 20 feet deep, growing by 10 feet in 12 hours and coming within less than 1 foot of the historical record.

Oregon’s weather is expected to turn increasingly wild this week with flooding and potential mountain snow impacting pre-holiday travel.

KOIN 6 Chief Meteorologist Josh Cozart captures the heavy flow of Multnomah Falls and Wahkeena Falls along the Columbia River Gorge after December's powerful atmospheric river clears western Oregon on.

The National Weather Service said a levee break in West Central King County prompted the warning in the west central Washington area.