FORECAST SUMMARY: Monday, June 22, 2026 through Friday, June 26, 2026
Ozone: 8-hour average Ozone Particulate concentrations are expected to be mostly Good (AQI Green) with a scattering of Moderate (AQI Yellow) for the forecast period.
PM-2.5: 24-hour average Fine Particulate concentrations are also expected to be mostly Good (AQI Green) with a scattering of Moderate (AQI Yellow) for the forecast period.
FORECAST DISCUSSION
The cool weather experienced during the past week was a gift to Air Quality with concentrations of both ozone and fine particulates parked firmly in the Good category. That trend looks to continue with a gradual warming trend throughout the week.
The rain endured Sunday night is slowly exiting the state, Monday morning, and low-level northerly flow is ushering in slightly cooler and less humid air. The high-pressure system building in behind the departing rain system will gain greater presence late Monday tonight and Tuesday as a mid/upper-level ridge builds over the Midwest.
The next weather feature of interest is associated with an approaching short wave which reaches the Great Lakes region Wednesday and Wednesday night. Model consensus has the surface low tracking through the northern Great Lakes setting up a warm front/cold front progression across Michigan which will give us our next chance of showers and thunderstorms. This system will not change our current air mass so temperatures will hold in the mid to upper 70s through Thursday. Air Quality should stay mostly Good with scattered Moderates.
Models indicate potentially warmer temperatures this weekend/early next week. Current projections have high pressure returning this weekend driving temperatures back into the 80’s with mostly dry conditions. Sunday has the potential for temperatures in the upper 80’s. While Air Quality does not appear to be an issue during this work week, the Friday forecast will have a better idea of any potential Air Quality issues for the weekend.
EXTENDED FORECAST:
With an increase in temperatures expected for the weekend, Air Quality is expected to begin a creep into the Moderate range. It is too early to indicate any possibility of poor Air Quality for the weekend, at this time.