FORECAST SUMMARY: Sunday July 12th, 2026, through Monday July 13th, 2026
Ozone:
Ozone concentrations are expected to be in the Moderate (Yellow AQI) range.
PM-2.5:
PM-2.5 concentrations are expected to be in the Good (Green AQI) to Moderate (Yellow AQI) range.
FORECAST DISCUSSION:
The heat starts to ramp up today, Sunday, for us Michiganders as another heat dome sets up a little further to the west than the one a few weeks ago. Regardless, though, 90-degree temperatures will return to most of the state with ample sunshine expected as well. With the High-pressure causing the heat dome being a little further to the west, our wind direction will predominantly be westerly, with some southerly component to it. Especially in west and southwest Michigan which will be monitored for any Ozone development. These winds will start to set up on Monday morning so, if anything, Monday may be a ramp up day for Ozone. As of now, Moderate AQI for Ozone is expected to occur with the potential for some hourly concentrations to reach the Unhealthy for Sensitive Groups range. Upper-level flow looks to be northwesterly, so this will help to keep Ozone at bay tomorrow, even though surface winds will be light and shifting to the west-southwest.
The relatively zonal flow we will have for the first half of the week will help to keep wildfire smoke away from the Great Lakes. The number of fires is holding steady with no additional fires popping up near us as of now, with most in the northern part of the Ontario and Quebec provinces. This time of year, smoke will need to be monitored daily, however, especially when winds are expected to shift.
EXTENDED FORECAST:
The heat returns this upcoming week with the 90s making an appearance once again. Air quality will likely remain in the Moderate range.
Next Forecast update: Monday July 13th, 2026