The map above shows the forecast for the distribution of near-surface smoke at 6 a.m. PDT September, 13, 2020.
It appears that severe impacts will occur in areas of Washington, Oregon, Idaho, and Montana.
(UPDATED smoke and air quality maps for September 13 can be found HERE)
Air quality from AirNow at 3 p.m. PDT September 12, 2020 is below. Most of Oregon, Washington, and northern California are in the categories of Unhealthy, Very Unhealthy, or Hazardous. If you’re in those areas and are lucky enough to have an N95 mask, this is a good time to use it. Being indoors does not help much unless you are aggressively filtering the air with a HEPA category filter. (Information about how to reduce your exposure to smoke.)
Below is the air quality forecast for Sunday September 13, 2020.
The photos below compare visibility in Eugene, Oregon on a clear day and today, September 12, 2020.