Atmospheric River Unleashes Record Rainfall and Forces Tens of Thousands to Evacuate in the Pacific Northwest

A Region on Edge as Water Keeps Rising

Rain hammered Washington and Oregon for days, and by Thursday morning the landscape carried the weight of a disaster still accelerating. Rivers pushed past records. Roads disappeared under fast-moving water. Entire communities stared at evacuation notices.

The driving force behind it all was a persistent atmospheric river, a narrow corridor of moisture stretching thousands of miles across the Pacific Ocean. This week, it parked over the Pacific Northwest and refused to move.

Governor Bob Ferguson warned late Wednesday night that “catastrophic flooding is likely", urging people across western Washington to prepare to leave. Officials estimated that as many as 100,000 residents could be ordered to evacuate.

Sirens echoed along the river valleys. Flood alerts reached more than 5 million people from Washington to Montana. Everywhere, the same message repeated: move now, before the water moves faster.

Skagit River Set to Shatter Historic Records

The most threatening rise came from the Skagit River, one of the largest rivers in Washington state. In the mountain town of Concrete, WA, the river was forecast to crest at 47 feet, more than 15 feet above major flood stage and higher than any level ever recorded.

Skagit County ordered every resident living inside the 100-year floodplain to evacuate to higher ground. Authorities counted 18 major floods and 15 moderate floods in the forecast.

In nearby Mount Vernon, WA, tension grew as the river approached floodwalls built in 2018. The barriers had held during the 2021 deluge, but this event was stronger.

Ellen Gamson from the Mount Vernon Downtown Association said the fear was real:
“It could potentially be catastrophic."

Water Moving Fast, Rescues Moving Faster

The atmospheric river did more than raise river levels; it swallowed roads. Crews across the region used inflatable kayaks to reach people trapped inside submerged vehicles. In Fall City, WA, teams rescued stranded residents through the night.

Chief John Brockmueller of the Napavine Police Department pleaded with drivers to stop pushing their luck in floodwater:
“You do not know how deep it is, you do not know how swift it is, and this is what happens — you get stuck there and then it is a situation you cannot control."

Along the Snohomish River, police knocked on doors warning residents to leave while they still had the chance. Parts of Sedro-Woolley, Orting, Ebey Island and several communities near the Puyallup River entered evacuation status.

The Lummi Nation, based west of Bellingham, declared its own state of emergency after rising tides and river water began isolating parts of the reservation.

A Deluge Across Washington, OR and Beyond

In the last 72 hours, western Washington and northwest Oregon saw 10 to 16 inches of rain, with higher totals in the Cascade and Olympic mountains. Seattle, WA recorded up to 16 inches in some areas, while Olympia Regional Airport broke a rainfall record with 3.03 inches in a single day.

Across the region, the hazards multiplied:

• Rock and mudslides along steep mountain terrain
• Washed-out roads and submerged vehicles
• Power outages affecting nearly 20,000 customers
• Boats deployed for emergency rescues

Governor Ferguson activated Washington’s Emergency Operations Center at Level 1, the highest possible response.

Montana also faced sudden flooding. In Lincoln County, MT, Governor Greg Gianforte urged residents to take warnings seriously as water levels rose quickly, threatening roads and homes.

Rivers Surging Beyond Known Limits

The atmospheric river pushed waterways into uncharted territory:

The Snohomish River was forecast to hit 33.6 feet, breaking previous records and surging 12 feet above normal levels.

The Grays River reached 33.3 feet in Rosburg, another historic crest.

Eighteen river gauges across Washington signaled major flooding conditions.

Emergency officials told residents in flood-prone zones to evacuate before rivers reached peak levels, warning that waiting too long would place both civilians and rescue crews in danger.

Lucia Schmit from Snohomish County Emergency Management said:
“We have made it through the first part of this weather challenge, but the forecasts tell us we need to prepare for another, bigger surge of rain and high water later this week."

Communities Underwater and Running Out of Time

In Snohomish, WA, business owner Colton Petit watched floodwater rush into his concrete plumbing shop.

“I could just see it start coming up," he said.
When the river crested, the water rose two feet in thirty minutes.
Petit stood still, watching the shop fill. “There is nothing you can really do… you just wait for the damage to be done and figure it out when it is all done."

Across Skagit County, people filled sandbags, shut off power to their homes and moved belongings to attics. Emergency shelters opened in coordination with the Red Cross.

The atmospheric river continued to pour moisture over the region, keeping rivers as much as 15 feet above normal levels. And while rainfall was expected to weaken by early Friday, forecasters warned that major flooding and landslide risks would remain for days.