Friday, May 24th, 2019 through Tuesday, May 28th, 2019
Ozone: 8-hour Ozone concentrations will be mostly Good through the forecast period.
PM-2.5: 24-hour Fine Particulate concentrations are expected to range from middle Good to low Moderate.
An active weather pattern continues as we move into the Memorial Day weekend. The weekend won’t be a complete washout, but periods of showers and storms exist through Tuesday. Sunday into Monday afternoon looks to be the driest period.
Clouds and precipitation chances keep ozone Good Friday and Saturday. A frontal boundary settles near the state border Sunday. Clouds and precipitation may linger in the south with mostly dry conditions further north. Winds will have a northerly component keeping ozone mostly Good even in areas that break into some afternoon sunshine. The boundary tracks back north Monday causing clouds to increase and precipitation to move back in during the afternoon. Chances for showers and storms continue Tuesday. Generally Good ozone is expected both Monday and Tuesday.
Increased moisture near the frontal boundary on Sunday may allow for some increased fine particulate into the Moderate range across the southern portion of the state. Otherwise, the active pattern keeps the air well-mixed and fine particulate is expected to be mostly Good.
Extended models show precipitation remaining in the forecast through mid-week. Air pollution during this time will be generally Good.