Friday, August 2nd, 2019 through Monday, August 5th, 2019
Ozone: 8-hour Ozone concentrations will range from Good to Moderate through the forecast period.
PM-2.5: 24-hour Fine Particulate concentrations will range from Good to low-Moderate.
Mainly dry conditions persist this weekend with only small chances for precipitation in association with a weak boundary dropping south Saturday. The next larger chance for precipitation comes into play late Monday/Tuesday as a stronger front passes through. For the most part expect seasonable, dry conditions through Sunday.
As for air quality, upper level northerly winds and cooler temperatures have kept ozone Good. With this flow persisting through the weekend, we don’t expect ozone to reach higher than Moderate. More of a southwesterly surface flow develops Monday ahead of the approaching boundary, but upper level temperatures remain low and northerly even as surface temperatures increase. Higher than Moderate ozone will not likely be seen Monday, but if this changes the forecast will be updated Sunday morning.
Fine particulate has also been Good, and a significant increase isn’t expected over the next few days. Readings should range from middle Good to low Moderate.
Extended models show a cool down for next week after the Tuesday front passes…air quality will be Good for both ozone and fine particulate.