June 7, 2018

Ozone levels increase with summer heat

PM 2.5 levels were mostly low today, with mostly Code Yellow (Moderate) levels of PM 2.5 being seen in the Mississippi Valley and the Great lakes region, along with some in the Pacific Southwestern area, as seen in AirNow's PM 2.5 map, top left. This PM 2.5 was somewhat affected by the smoke being spread from wildfires in the Mississippi Valley, as seen in NOAA's HMS map, top right. Ozone levels, however, were more widespread and of higher levels. Both Code Yellow and Code Orange (Unsafe for Sensitive Groups) levels were seen in the Mississippi Valley, the Great Lakes region, some of the Plains States, the Pacific Southwest, and the Rocky Mountain States (weather.gov, bottom left). The rise in Ozone is due to the increased temperature in the summer months, and will most likely continue to increase as the summer progresses and temperatures rise.

Posted by mglover at June 7, 2018 8:37 PM
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