Oregon’s first fall storm leaves Portland under siege of rain starting Tuesday, September 30, with commutes and roadways directly in the crosshairs. Drivers should expect slick pavement, standing water, and delays along I-5 and I-84 through Wednesday morning.
According to the National Weather Service, showers develop Monday night and strengthen Tuesday with an 80% chance of rain during the day, rising to 100% Tuesday night. Thunderstorms may flare, and wind gusts could top 20 mph across the Portland metro. Commuters are urged to slow down, allow extra time, and avoid flooded lanes.
The storm targets western Oregon with periods of heavy downpours, straining storm drains in Portland, Gresham, and Beaverton. Southbound I-5 traffic toward Salem faces the heaviest rainfall late Tuesday into early Wednesday. TriMet riders should prepare for service disruptions as road conditions deteriorate…