Washington Airports Brace for Flooding as Atmospheric River Delivers Heavy Rain

Chehalis-Centralia prepares for the worst-case scenario, while Harvey Field anticipates no issues.

Meg Godlewski

Monday, December 08, 2025 at 04:00 PM ET

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Meg Godlewski

The Pacific Northwest is getting hammered by heavy rain, and airports near rivers are bracing for flooding events. [Credit: iStock]

Key Takeaways:

The Pacific Northwest is experiencing an atmospheric river bringing heavy rain and high winds, leading to widespread flood warnings and localized flooding.
Chehalis-Centralia Airport (KCLS), historically prone to flooding, is prepared with volunteer systems for aircraft relocation, anticipating a high water peak on December 11.
Initially not expecting flooding, Harvey Field (S43) now faces a high risk as the Snohomish River is projected to crest at 34 feet, prompting calls for volunteers to move aircraft and possessions from low-lying areas.

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The Pacific Northwest is experiencing several days of heavy rain and high winds known as an atmospheric river.

Weather officials are warning of localized flooding in low-lying areas, including the area surrounding the Chehalis-Centralia Airport (KCLS) in Lewis County, Washington. The airport is located 18 nm south of Olympia in the Chehalis Basin at the confluence of the Chehalis, Newaukum, and Skookumchuck rivers. A levee and two water pumps help protect the airport from flooding.