Friday, August 30th, 2019 through Tuesday, September 3rd, 2019
Ozone: 8-hour Ozone concentrations will be mostly Good through the forecast period with Moderates possible Tuesday.
PM-2.5: 24-hour Fine Particulate concentrations will remain mostly Good.
Cool, quiet conditions will start the holiday weekend as high pressure settles in and remains in place through Sunday. An upper level systems could bring scattered precipitation late Saturday/early Sunday and again Monday, but these do not look like widespread rain events. Warmer conditions move in Tuesday ahead of a cold front which is expected to pass through later in the day. The big weather story this weekend, however, is hurricane Dorian which is expected to make landfall in Florida early next week.
As for air quality, through Monday a predominant northwesterly flow remains in place. Cooler temperatures and some clouds should keep ozone mostly Good. Warmer surface and upper level temperatures move in Tuesday with southwesterly winds increasing, especially across the southern portion of the state. Weather conditions Tuesday do look a bit conducive for ozone development across the south, but we will be coming off a low background of levels. Also, earlier sunset this time of year and clouds moving in will aid in keeping conditions from reaching higher than Moderate. Weather conditions will be evaluated during the weekend and if needed, the forecast will be updated.
Without much of a stagnant period though early next week, any significant build-up of fine particulate is not anticipated. Readings should remain mostly Good.
Extended models show high pressure and cooler conditions by midweek next week. Air quality should be Good during this period.