Monday, June 3rd, 2019 through Friday, June 7th, 2019
Ozone: 8-hour Ozone concentrations will be mostly Good with a few low-Moderates.
PM-2.5: 24-hour Fine Particulate concentrations will also range from Good to low Moderate.
High pressure Monday is producing dry, cool conditions and allowing for Good air quality. By Tuesday, warm air moves in as the high tracks east bringing more of a southerly wind. A shortwave dropping in Tuesday will produce clouds and scattered precipitation which could last through Wednesday. High pressure is then forecast to move back in for the end of the workweek.
As for air quality, both ozone and fine particulate will range Good Monday. Increased clouds and chances for precipitation should keep ozone Good Tuesday; however, areas that break into more sunshine could reach into the Moderate range. Clouds linger Wednesday keeping ozone generally Good. Conditions dry out Thursday and more in the way of sunshine is expected. Temperatures increase both at the surface and upper levels, but winds remain southeasterly. This should keep ozone from increasing higher than low Moderate. Similar weather conditions are expected Friday and ozone should range from Good to Moderate.
Without a good period of stagnation during the week, fine particulate is expected to range between Good and low Moderate.
Extended models show a possible upper low moving in for the weekend; however, there is a bit of uncertainty in its development. If the low does not pan out, dry conditions and good amounts of sunshine could be in place. This forecast will be updated Friday to detail expected air quality conditions for the coming weekend.