Today's and yesterday's warnings in reverse chronological order.
A strong ridge of high pressure over the region will result in poor mixing and light winds through early next week. Pollutants are expected to build near the surface with a degradation of air quality during this period.
WAC001-007-017-019-025-043-047-051-065-191700- /O.NEW.KOTX.AS.Y.0001.181018T1614Z-181023T1700Z/ Adams-Chelan-Douglas-Ferry-Grant-Lincoln-Okanogan-Pend Oreille- Stevens- 914 AM PDT Thu Oct 18 2018
...AIR STAGNATION ADVISORY IN EFFECT UNTIL 10 AM PDT TUESDAY...
The National Weather Service in Spokane has issued an Air Stagnation Advisory...which is in effect until 10 AM PDT Tuesday.
* Air Quality...Moderate deteriorating to unhealthy.
* Impacts...Persons with respiratory issues should follow the advice of their physician on how to deal with poor air quality. Also, outdoor burning may be limited, so please consult with your local burn agencies.
An Air Stagnation Advisory indicates that due to limited movement of an air mass across the advisory area...pollution will increase to unhealthy levels. Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution.