Air quality today was mostly good, with only some Code Yellow (Moderate) PM 2.5 being seen in the Mississippi Valley, the Mid-Atlantic, and California (AirNow, top left). The small amount of PM 2.5 seen in the Mississippi Valley was due to wildfires in this area. This smoke can be seen in NOAA's HMS map, top right. The PM 2.5 in California may have also been partially due to smoke from wildfires in the northern part of the west coast. Ozone levels, on the other hand, were a bit lower, with only very small amounts of Code Yellow seen in the southern Plains States and the Mississippi Valley.

Air quality and ozone were good today with the exception of a few Code Yellow (Moderate) spots in the Mississippi Valley due to light smoke being channeled by the clockwise circulation of a high pressure system centered around Tennessee (AirNow, top left and top right respectively).

There were numerous small,short-lived prescribed burns (NAAPS) observed during the afternoon across much of the southeast and the Mississippi Valley, extending westward (HMS, bottom left).

According to NOAA's Hazard Fire and Smoke Product, top left image, the Klondike fire in southwest Oregon produced smoke moving across southern Idaho and into Wyoming. Several prescribed fires in northern Idaho were emitting light density smoke moving to the east, while the Prospect fire in central Idaho had a heavy-density smoke plume extending across southwest Montana. Additional wildfires in northern California were producing heavy-density smoke plumes moving towards the north and into Oregon (top right image). Cloud coverage hindered the AOD retrieval. The bottom left image shows AOD, associated with the smoke plume, to range between 0.2 to 0.6.

Fires in Arizona continue to burn producing a moderate sized thin density smoke plume traveling east into New Mexico, as reported by NOAA's Hazard Mapping System Fire and Smoke Product. Smoke can be seen from three fires in Arizona in today's NASA Aqua MODIS true color (RGB) image (top left image). The smoke was captured also in VIIRS AOD retrievals with the smoke associated with fires yielding values between 0.2 to 1 in Arizona, while the smoke plume over New Mexico is in the range of 0.2 to 0.6 (top right image, courtesy of NOAA IDEA.)

AERONET sun photometer retrievals from at USGS Flagstaff show coarse smoke particles (aerodynamic diameter greater than 2.5 microns) intensifying as the day progressed (bottom left image). The corresponding single scattering albedo timeseries show scattering rather than absorbing increasing as well. The line slope increases with time indicating than scattering instead is absorption dominating in the retrieval.

Air quality today was mostly good, with small amounts of Code Yellow (Moderate) PM 2.5 being seen in the Great Lakes Region, the Rocky Mountain States, and along the West Coast (Airnow, top left). This increase of PM 2.5 was partially due to smoke in these regions from wildfires. The spread of this smoke can be seen in NOAA's HMS map, top right. Light plumes of this smoke, specifically smoke from California and Oregon, was captured in NASA's MODIS Terra images, bottom left. Ozone levels were also very low, with some Code Yellow levels being seen in California, the Rocky Mountain States, and the Mississippi Valley (AirNow, bottom right).