Catastrophic flooding prompts "go now" evacuations in multiple Pacific Northwest towns as atmospheric river pounds the

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region

One of the longest atmospheric rivers ever seen by meteorologists is currently drenching much of the Pacific Northwest with more precipitation than its rivers can accommodate in their usual channels, resulting in destructive floods that local and state elected officials are calling catastrophic. Rivers like the Skagit, Snohomish, Stillaguamish, Snoqualmie, and Nooksack are already way over their banks and are expected to inundate more homes and businesses in the hours ahead. The damage could be severe.

Residents of many communities are being instructed to “go now” and evacuate before conditions become significantly more dangerous in the hours ahead.

“Rainfall of up to 8 to 10 inches over the past several days has increased antecedent soil moisture to high levels across western Washington,” the National Weather Service warned. “Additional heavy rainfall of 1 to 4 inches across the lowlands and 4 to 10 inches over the Olympics and Cascades is expected through late Wednesday. Wet and unsettled conditions are also favored to continue through the rest of the week. This amount of rain will put extra pressure on soil instability, leading to an increased threat of landslides and debris flows, especially from recent burned areas.”

“A mudslide was reported along I‑90 Monday evening near North Bend, causing highway closures and extensive delays. More landslides are possible. Areas most susceptible to landslides debris flows under these conditions are steep coastal bluffs, other steep hillsides or road cuts, and recent burned areas. A diminishing threat of landslides and debris flows will continue for several days after the rain ends.”

https://www.nwprogressive.org/weblog/2025/12/catastrophic-flooding-prompts-go-now-evacuations-in-multiple-pacific-northwest-towns-as-atmospheric-river-pounds-the-region.html

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1. Please stay safe!