09/23/2019 Forecast Update


Monday, September 23rd, 2019 through Monday, September 30th, 2019

Ozone: 8-hour Ozone concentrations will be mostly Good.

PM-2.5: 24-hour Fine Particulate concentrations will also be mostly Good with only a few chances for low Moderate readings.


On and off weather systems this week will bring a couple dry days, followed by chances for precipitation. High pressure sliding in Monday ends precipitation that brought a fair amount of rain to parts of the state late Sunday. Dry, cooler conditions are expected Tuesday, but the next weather system brings precipitation back Wednesday. High pressure then quickly slides in Thursday with the next system bringing showers back in the forecast Friday. Weather systems passing by every couple of days will hamper air pollution from significantly developing. Most locations will be Good for both ozone and fine particulate through Friday.

Precipitation may linger into Saturday with high pressure dominating for Sunday. Weaker winds Saturday and early Sunday could allow for small increases in fine particulate with a few low-end Moderates possible in the south. Otherwise, fine particulate and/or ozone should remain Good through the weekend.


Extended models show a warm front lifting north Monday bringing another round of precipitation. Increased moisture may allow for a monitor or two of Moderate fine particulate; however, mostly Good pollution levels should prevail.

Next forecast update: Monday, September 30th, 2019