Air Stagnation Advisory issued January 9 at 12:49AM PST until January 11 at 10:00AM PST by NWS Portland OR
Issue date: 2026-01-09T08:49+00:00
* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. * WHERE...Central and Southern Willamette Valley, Tualatin Valley, Portland West Hills and Chehalem Mountain, Inner Portland Metro, North Clark County Lowlands, and Inner Vancouver Metro. * WHEN...From 10 AM this morning to 10 AM PST Sunday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.
