Expecting some areas of Moderate air in western WA through Friday evening, while eastern WA will just keep seeing its air deteriorating air (Moderate or worse) through early Saturday morning.
A cold front will swing by Friday evening and start to flush out smoke. A windy and cooler weekend is likely in eastern WA, reducing smoke accumulation in most areas but also worsening fire spread.
|9AM Thursday vertical smoke|
|11PM Friday vertical smoke|
Expect mostly Good air in most of Western WA this weekend. Areas away from the fires are likely to scrub out (Good air) over the weekend, but increased smoke production from larger fires during frontal passage is likely to keep cities in Chelan and Okanogan counties at Moderate/ USG.
By early next week, still conditions are likely to return, ushering a return to smoke similar to what we've endured this week. Notice also in the figures above how a series of new fires in central British Columbia are producing a lot more smoke. Wind flows by Monday might start moving some of that smoke toward Washington.
- The US Forest Service has provided Washington with an Air Resource Advisor, who will be producing detailed, localized air quality forecasts for most cities in Chelan and Okanogan Counties, like the one just below this blog post.
- New air monitors have been set up in Plain and Newport, with another en route to Republic. Air quality in those areas can tracked on the map above. Here's what the samplers look like.