July 6, 2017

Ozone rises in Pacific Southwest and Great Lakes Region

Air quality was somewhat bad today, with a lot of Code Yellow(Moderate) PM 2.5 spread across the nation (AirNow, top left). Most of this PM 2.5 was concentrated in the Rocky Mountain States, the Great lakes region, the Mississippi Valley, and the Southeast. The elevated PM 2.5 in the West was most likely due to smoke coverage in this area, as seen in NOAA's HMS map, top right.

There was also a good amount of ozone seen in the Pacific Southwest and the Great Lakes Region, reaching up to Code Red (Unsafe) levels in both of these areas (weather.gov, mid-left). The ozone i the Pacific Southwest might have been partially due to very high temperatures in this area, as seen in weather.gov's temperature map, mid-right, which shows that temperatures in this region got into the hundreds today. As for the Great Lakes region, the ozone may have resulted from slow on stagnant winds in this area, as seen in weather.gov's wind map, bottom left.

Posted by mglover at July 6, 2017 11:23 PM
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