A large amount of wildfires continue to burn in Canada, producing a expansive plume of light-moderate density smoke extending through Northwest Territories, eastern Yukon, Nunavut, Hudson Bay, central and Manitoba, Ontario and Quebec. Smoke locations over
Canada are shown in the top left image (Google Earth overlay of NOAA HMS smoke product). The Naval Research Laboratory (NRL) total optical depth prediction shows that the smoke may yield AOD values as high as 0.8-1. In addition shows the presence of dust in the Gulf of Mexico (possibly from the Saharan desert), also reported by NOAA HMS, may be contributing about 0.1. Sulfate aerosols are expected to dominate the makeup of particulate in eastern half of the US. Satellite AOD were hindered by the presence of clouds throughout of the United States.
AQI animations, from EPA Airnow, show Moderate (Code Yellow) PM2.5 concentrations over California, Florida and the Southeastern United States. For ozone AQI levels reached Moderate levels over California, and the Rocky Mountains States.