Air quality across the United States was primarily good today in terms of surface ozone concentrations, as no elevated AQI were reported. However, several wildfires throughout out Mississippi and Alabama were observed by NOAA's HMS analysis team (top left) and PM2.5 measurements were elevated in the region, likely associated with smoke plumes (top right). Today's run of NRL's NAAPS Aerosol Model illustrates increased smoke surface concentration near the active fires as well (bottom left). Despite the indication of smoke, Aerosol Optical Depth (AOD) retrievals from today's MODIS overpass onboard the Terra satellite reveals slightly elevated AOD near the Mississippi-Tennessee border (bottom right). A nice comma-head cloud structure associated with a large low pressure system currently pushing through the Mid-West is also illustrated in the MODIS image.