Another atmospheric river brings major flooding concerns to Oregon, Southwest Washington

Officials are warning residents in northwest Oregon and Southwest Washington to once again brace for more rain and strong winds Thursday.

An atmospheric river is making its way through the region, bringing with it several weather hazards including potential flooding and increased landslide risks.

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In response to the severe weather, the Oregon Department of Emergency Management activated the State Emergency Coordination Center to Level 3 on Wednesday. The activation allows the state to provide speedy support to local emergency management offices and communities impacted by the atmospheric river.

The National Weather Service has issued major flood warnings for several rivers in Oregon and Washington including the Clackamas River, at Estacada, the Hood River, near Tucker Bridge, and parts of the Cowlitz River.

According to the NWS, the Clackamas River near Estacada is expected to rise above flood stage this evening and crest around 25 feet late tonight.

Officials are warning people to stay away from parks along rivers as well as any other low-lying, flood prone areas.

High winds and wet soil

High winds early Wednesday morning knocked down power lines and trees throughout the region. At one point, more than 560,000 people were without power.

Tualatin Valley Fire & Rescue crews had to respond to nearly 90 calls for service between midnight and 8 p.m. That included an incident in West Linn where downed trees and power lines trapped a student and a driver in a school bus.

“Our firefighters coordinated with the school district and Portland General Electric to keep the driver and student safe until utility crews could deenergize the lines,” TVF&R said in a Facebook post. “A parent of the student was also able to come to the scene to help keep their child remain calm and assured. In the end the driver and student were able to safely exit with no injuries.”

TVF&R officials shared the following reminders:

• Never touch a downed power line — or anything else the line is touching
• Always assume power lines are live and stay at least 50 feet away
• Remember, a downed line doesn’t have to spark to be dangerous.

According to NWS, soil in the area is generally still saturated from last week’s storms, so it doesn’t take exceptional wind speeds to knock down trees or power lines.

And in recent days the strong winds have been moving abnormally south to southwesterly, so that also makes tree damage more likely.

More flooding and wind in the forecast

Steady rain from this week’s second weather system began to fall early Thursday morning. It’s expected to continue throughout the day, with the heaviest rain expected in the afternoon and evening.

The weather service has also issued a wind advisory for much of western Oregon including the greater Portland-Vancouver metro area.

According to the NWS, people should expect to see winds of up to 20 miles per hour — with gusts up to 45 miles per hour — throughout the day.

The strong winds could knock down trees and power lines, which may result in widespread power outages.

Officials are reminding people to secure any objects that could easily blow away and to stay away from any downed power lines. That advisory is in effect until 7 p.m. Thursday.

A high wind watch is also in effect for the Central Oregon Coast Range, where gusts could reach up to 60 mph.

And in the Cascade passes, snow began to fall Thursday morning. A winter weather advisory was in effect for heavy snow and wind. That snow will likely turn to rain by Thursday afternoon, but that could leave a slushy mess on the roadways.

Check the latest emergency closures and delays at opb.org/closures