Air Stagnation Advisory issued December 2 at 4:44PM PST until December 5 at 4:00AM PST by NWS Portland OR
* WHAT...For the Air Stagnation Advisory, 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...Inner Vancouver Metro. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued December 2 at 3:55PM 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 December 1 at 5:11PM 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...Until 4 AM PST Tuesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued December 1 at 12:46PM PST until December 3 at 4:00AM PST by NWS Spokane WA
* WHAT...Stagnant Air leading to the potential for decreasing air quality. * 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 December 1 at 5:37PM PST until December 4 at 4:00PM PST by NWS Medford OR
* WHAT...For the Cold Weather Advisory, very cold temperatures as low as 18 degrees expected. 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...For the Cold Weather Advisory, the southern end of the Rogue Valley including Ashland as well as the outskirts of Phoenix and Talent; the Shady Cove area; areas east of Eagle Point and White City on Highway 140; and portions of the Applegate Valley including the outskirts of Ruch, Applegate, and Jacksonville Hill.
Air Stagnation Advisory issued December 1 at 4:42PM 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...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, Outer Southeast Portland Metro, 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 December 1 at 4:59PM MST until December 6 at 9:00PM MST by NWS Boise ID
* WHAT...For the Dense Fog Advisory, visibility one to two miles in dense fog. For the Air Stagnation Advisory in valleys, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Lower Treasure Valley Zones. * WHEN...For the Dense Fog Advisory, until 11 AM MST Monday. For the Air Stagnation Advisory, until 9 PM MST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous especially along Interstate 84 from Fruitland
Air Stagnation Advisory issued November 30 at 12:24PM 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...Until 4 AM PST Tuesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued November 30 at 1:38PM 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. This is due to an inversion near the surface that may trap air pollutants in valleys. * 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.
Air Stagnation Advisory issued November 30 at 9:08PM 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.