Cold Weather Advisory issued November 29 at 8:37PM CST until November 30 at 10:00AM CST by NWS Bismarck ND
* WHAT...Very cold wind chills as low as 35 below expected. * WHERE...Burke, Renville, Bottineau, Rolette, McHenry, and Pierce Counties. * WHEN...Until 10 AM CST Saturday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 10 minutes.
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.
Dense Fog Advisory issued November 27 at 8:37PM PST until November 28 at 10:00AM PST by NWS Portland OR
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, 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 Willamette Valley. * WHEN...For the Dense Fog Advisory, until 10 AM PST Thursday. For the Air Stagnation Advisory, until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.