I walked outside this morning in north Seattle around 6:45 AM and the smoke smell was very strong. The expected worst (and last) day of the smoke is here and it is nasty.
The Seattle PanoCam this morning at sunrise clearly showed the shallow smoky miasma over the city. Even the tops of some of the tall buildings are above the worst of it.
The calibrated Purple Air air quality sensors this morning shows the plume of terrible surface air quality exiting from the Skykomish Valley from the Bolt Creek fire, which then heads south over Seattle. Purple colors indicate truly bad air quality. Red is just bad. The plume is relatively narrow...head east or west and you can get out of it.
The Puget Sound Clean Air Agency has a ceilometer in Marysville that shows the vertical structure of the smoke plume at that site (which is a bit north of the worst of it). The graphic (shown below) shows that the worst of it (yellow colors) was down low and moved in last evening. Yuk.