April 20, 2017

Light smoke in the Mississippi Valley

Air quality was mostly good today across the nation, with only Code Yellow (Moderate) levels of PM 2.5 appearing in the Pacific Southwest, the Mississippi Valley, and the border between the Mid-Atlantic and the Northeast (AirNow, top left). The PM 2.5 in the Mississippi Valley was most likely due to smoke seen in this area, as seen in NOAA's HMS map, top right. The smoke was very light density, so it could not be seen in NASA's MODIS Terra satellite images, bottom left, especially due to a large amount of cloud coverage in the region.

Posted by mglover at April 20, 2017 9:25 PM
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