Looking at the NOAA HMS Smoke and Fire Product (top left), the clumps of small red dots indicate masses of currently burning fires, with smoke plumes being indicated by the grey patches. Smoke plumes were seen in both the Northwest Territories and near the Hudson Bay, although the area of smoke to note is arising from wildfires in central British Columbia. The MODIS Terra image (top right) illustrates the consequential elevated AODs in British Columbia, Vancouver Island, and even the northernmost portion of Washington state. In addition, the HMS picked up a small plume emanating from several northern California fires.
The EPA AIRNow combined AQI loop (bottom left) shows moderate AQIs for much of the eastern half of the United States, but relatively good air quality otherwise. The current high is in Louisville, KY (107). The NAAPS Aerosol model (bottom right) at 1800 UTC predicts higher sulfates for the East Coast and Great Lakes, while the Saharan dust Daniel mentioned yesterday was eminent for Texas and parts of the Central Plains. This could be affecting AQIs and AODs, as MODIS Terra picked up slightly higher AODs than normal in these areas (where cloud cover was not too dense).