Looking at the NOAA HMS Smoke and Fire Product (left), there is a small light plume of smoke off the shore of Newfoundland that is heading off into the Atlantic Ocean. In addition, there is a high concentration of fires in the Mississippi Valley, as mentioned yesterday. Although cloud cover limited some of the satellite data, the GAST East AOD animation (right) shows higher AOD in this region.
Moderate AQIs are seen in the EPA AIRNow daily AQI animation (bottom right) corresponding to the aforementioned fires as well as the Plains States. The fires in the Mississippi Valley likely attributed to the elevated AOD and AQI in the area, even though no smoke plumes are seen by the HMS. The highest AQI for the day (as of 21:00 UTC), however, belongs to Nipomo, CA (158). The image to the right of EPA AIRNow is courtesy of NASA GEOS-5, and is a SO2 column mass forecast for today. As seen in previous posts, the eastern half of the US is seeing higher values of sulfates.