November 16, 2017

Smoke creates high PM 2.5 in Plains States

There was a lot of PM 2.5 seen across the nation, with Code Yellow (Moderate) levels being seen in the Southeast, the Mississippi Valley, the Pacific Southwest, the Rocky Mountain States, and the Great Lakes region (AirNow, top left). There was also some Code Orange and Code Red (Unsafe for Sensitive Groups and Unsafe, respectively) seen in the Southeast and the southern Plains States. This elevated PM 2.5 was due to smoke coming from the Southeastern wildfires, as seen in NOAA's HMS map, top right. This smoke was very widespread, and small plumes could be seen mixed in with cloud coverage in NASA's MODIS Terra images, bottom left. Lastly, ozone levels were very low, with only small amounts of Code Yellow being seen in the Rocky Mountain States (weather.gov, bottom right).

Posted by mglover at November 16, 2017 9:23 PM
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