Air Stagnation Advisory issued November 30 at 9:08PM PST until December 2 at 4:00PM PST by NWS Portland OR
* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...Portland Metro Hills, 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 30 at 1:24PM PST until December 4 at 4:00PM PST by NWS Medford OR
* WHAT...A ridge of high pressure will lead to a strong inversion and stagnant air conditions near the surface that will continue to trap pollutants. This could worsen air quality over time. * WHERE...Valley locations across southern Oregon. West of the Cascades, this includes the Umpqua, Illinois, Applegate, and Rogue valleys. East of the Cascades, this includes Klamath Falls, Sprague River, Chiloquin, Chemult, Silver Lake, Paisley, and surrounding areas. * WHEN...Until 4 PM PST Wednesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 30 at 1:09PM PST until December 3 at 4:00AM PST by NWS Spokane WA
* WHAT...Decreasing air quality expected. * WHERE...Wenatchee Area, Waterville Plateau, Chelan County. * WHEN...Until 4 AM PST Tuesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...Light wind and stable weather are expected through at least Monday night leading to the potential for decreasing air quality. Degraded air quality can lead to issues for people with respiratory problems.
Air Stagnation Advisory issued November 29 at 3:51PM PST until December 3 at 4:00AM PST by NWS Spokane WA
* WHAT...Decreasing air quality expected. * WHERE...Wenatchee Area, Waterville Plateau, Chelan County. * WHEN...From 4 AM Saturday to 4 AM PST Tuesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...Light wind and stable weather are expected through at least Monday night leading to the potential for decreasing air quality. Degraded air quality can lead to issues for people with respiratory problems.
Air Stagnation Advisory issued November 29 at 2:12PM PST until December 3 at 4:00AM PST by NWS Pendleton OR
* WHAT...Poor air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Kittitas Valley and Yakima Valley. * WHEN...From 4 AM Saturday to 4 AM PST Tuesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 29 at 4:53PM PST until December 4 at 4:00PM PST by NWS Medford OR
* WHAT...A ridge of high pressure will lead to a strong inversion and stagnant air conditions near the surface that will continue to trap pollutants. This could worsen air quality over time. * WHERE...Valley locations across southern Oregon. West of the Cascades, this includes the Umpqua, Illinois, Applegate, and Rogue valleys. East of the Cascades, this includes Klamath Falls, Sprague River, Chiloquin, Chemult, Silver Lake, Paisley, and surrounding areas. * WHEN...Until 4 PM PST Wednesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 29 at 1:30PM PST until December 5 at 4:00AM PST by NWS Portland OR
* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...Central and Southern Willamette Valley, Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 29 at 1:30PM PST until December 2 at 4:00PM PST by NWS Portland OR
* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants 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 29 at 1:11PM MST until December 6 at 9:00PM MST by NWS Boise ID
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...Until 9 PM MST /8 PM PST/ Friday. * 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 2:49PM 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...Central and Southern Willamette Valley, Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, 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.