Oregon — A gray lid hangs low over the Willamette Valley this morning. Fog pools in low spots. Cold air refuses to move. Breathing feels heavier than usual, especially near busy roads and neighborhoods with wood burning.
An Air Stagnation Advisory remains in effect across western and central Oregon through Friday evening. The advisory includes Eugene, Springfield, Corvallis, Salem, and parts of the Lower Columbia and Cascade foothills. Light winds and limited air movement allow pollutants to build near the ground.
This setup matters now. Air quality can steadily worsen, particularly for children, older adults, and anyone with asthma or heart conditions. State agencies urge residents to avoid outdoor burning and limit residential wood stove use. For now, smoke and vehicle emissions linger longer than normal.
Patchy fog and areas of frost add to the concern this morning. Visibility may drop at times, especially near rivers and low-lying roads. Drivers should allow extra time and use low beams in fog-prone areas.
By later today, partial sunshine breaks through. Temperatures climb into the low 60s, but calm winds persist. That keeps the stagnant pattern intact through Friday. Friday morning fog may again be slow to lift.
Relief begins to show by Saturday. Clouds increase as a Pacific system approaches. Rain chances rise late Saturday into Sunday. That incoming moisture should help scrub the air and improve overall conditions.
Looking ahead, early next week trends wetter and cooler. National outlooks suggest above-normal temperatures returning later next week, signaling a gradual shift toward a more active, cleaner pattern across the Northwest.
Five-Day Outlook for Eugene, Oregon
- Today: Fog early, then partly sunny. High near 62.
- Friday: Morning fog, then mostly sunny. High near 62.
- Saturday: Clouds increase. Chance of rain late. High near 59.
- Sunday: Rain likely. High near 54.
- Monday: Showers likely. High near 51.
