Seattle is in the midst of some record-breaking bad air quality due to the wildfires in British Columbia, eastern Washington and California. Unless the wind is blowing form the west, it gets smokey in Seattle and an inversion layer traps the smoke down here between the mountains.
There are a couple handy sites for helping to check how bad it is right now and how it’s going to look in the future. The first is the Puget Sound Clean Air site. It shows a short timeline of the particle count in the air.
The second is an experimental forecast from NOAA that predicts where the smoke will be going. Choose your overlay on the top left and then choose the hour of the forecast on the bottom left. (Note that if you slide it all the way to the right it appears to jump back in time.) The forecast only goes out about 24 hours, but, for example, today you can at least have some hope that tomorrow will be a little better.
I found both of these links by reading Cliff Mass’s blog and he has a lot more info about the smoke there as well as an analysis of whether or not there is a trend of these fires getting worse (global warming?!)