Tuesday, September 16 – Wednesday, September 17: In the West, sunny skies and warm temperatures will enhance ozone formation. As a result, parts of central and southern California will reach Unhealthy for Sensitive Groups AQI levels, with a few areas reaching Unhealthy AQI levels. Farther north, light winds will limit pollutant dispersion in the Northwest, resulting in areas of Moderate AQI levels in Washington. In the Southwest, gusty winds will cause blowing dust and result in Moderate AQI levels in Arizona.
In the Midwest and East, a surface high pressure will produce light winds, liming pollutant dispersion. In addition, sunny skies and warm temperatures will enhance ozone formation. As a result, a few areas throughout the Midwest and East will reach Moderate AQI levels on Wednesday.
Today's
Forecast | Cities
with Action Days (Air Quality Alerts)
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