September 14, 2020 | 10:35 a.m. PDT
The fires in Oregon, Washington, and California continue to produce large quantities of smoke affecting air quality in those states and portions of Idaho, Montana, Wyoming, Nevada, and Arizona.
The forecast for Tuesday, below, shows improvement in the San Francisco and Los Angeles areas.
Below is current information about smoke dispersion across the U.S. and Canada. It is tough to find good, easy to read maps that show concentrations of wildfire smoke across the United States. The backgrounds in some cases obliterate the smoke information or the state boundaries.
If you find a good smoke map, let us know in the comments.
The NOAA webpage with the map below sometimes has smoke data, and sometimes it doesn’t. It also has this, seen today September 14, 2020: “Please note that this web page that you are currently on will be permanently retired on September 7, 2020.” There is a link to a different page, but I was unable to quickly find a substitute map.
The next two maps from AirNow have the same smoke data, but there is a choice of two background maps, terrain or aerial.