Air Stagnation Advisory issued November 28 at 2:49PM PST until December 2 at 4:00PM PST by NWS Portland OR
* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 28 at 2:15PM MST until December 5 at 9:00PM MST by NWS Boise ID
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that could trap pollutants in valleys. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...From 9 PM MST /8 PM PST/ this evening to 9 PM MST /8 PM PST/ Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...The advisory continues through the long-term forecast, and may be extended if conditions continue.
Air Stagnation Advisory issued November 28 at 8:22AM PST until December 2 at 4:00PM PST by NWS Portland OR
* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 27 at 8:37PM PST until December 2 at 4:00PM PST by NWS Portland OR
* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 27 at 4:50PM PST until December 3 at 4:00PM PST by NWS Portland OR
* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 27 at 4:50PM PST until December 2 at 4:00PM PST by NWS Portland OR
* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.