Medium Range Air Quality Forecast Discussions Begin May 21

We will begin the Mid-Atlantic region 5-day medium range air quality forecast discussions for the 2018 ozone season on Monday, May 21.  Similar to last year, we will issue the discussions on Mondays-Fridays only.

New for this year: since PM2.5 rarely rises above the low Moderate range during the summer season in the Mid-Atlantic, our discussions will exclusively focus on ozone.  The only exception will be if conditions develop that warrant discussion of PM2.5, such as local/regional wildfires or a Saharan dust transport event.