Seattle, WA – The Pacific Northwest is heading into a wet, storm-driven pattern from December 18–24, with NOAA’s long-range outlook showing above-normal precipitation across Washington, Oregon, and northern California. A series of Pacific systems is expected to deliver multiple rounds of rain, mountain snow, and gusty winds as Christmas Eve approaches.
According to NOAA, western Washington—including Seattle, Tacoma, and Olympia—will see the most consistent rainfall. Periods of moderate to heavy showers are likely from December 19–23, with ponding on roadways and travel slowdowns. Coastal areas, including Aberdeen and Forks, may see locally heavier totals with breezy to windy conditions.
Farther south, northwest Oregon—including Portland, Salem, and the I-5 corridor—may experience several soggy commutes, with the strongest rainfall expected December 20–22. Localized flooding in low-lying spots is possible during heavier bursts.
In the Cascades, colder air at higher elevations will allow snow to accumulate, creating treacherous travel across mountain passes such as Snoqualmie, Stevens, Santiam, and Willamette Passes. Snow levels may fluctuate early in the period before lowering toward December 22–24, increasing the risk for chain restrictions and delays.
Northern California, especially Redding, Eureka, and the coastal ranges, will also see rounds of moderate to heavy rain, with Sierra foothill elevations picking up early-season snow.
Major regional routes—including I-5, U.S. 101, and key mountain pass highways—may face reduced visibility, hydroplaning hazards, strong winds, and holiday travel delays, particularly December 20–24.
