Ozone:
Ozone concentrations are expected to range between Good (Green AQI) and Moderate (Yellow AQI).
PM-2.5 (Fine Particulate):
PM-2.5 concentrations are expected to remain in the Unhealthy for Sensitive Groups (USG, Orange AQI) range, with some areas reaching Unhealthy (Red AQI) levels.
Forecast Discussion:
After a brief improvement in air quality across the Lower Peninsula on Friday, wildfire smoke is expected to return as winds shift back to a northwesterly flow. The Upper Peninsula experienced USG concentrations Friday, with only a short period of relief in the eastern regions.
Today (Saturday) and tomorrow (Sunday), smoke plumes will move southward, impacting the entire state once again. Elevated PM2.5 levels are anticipated across Michigan through the weekend.
Ozone levels are projected to stay within the Good to Moderate range for now. However, as this smoke episode comes to an end early next week, conditions will be monitored closely. Historically, lingering smoke can enhance ozone formation. If ozone concentrations appear likely to exceed USG levels, they will be incorporated into the ongoing forecast updates.
Extended Forecast:
Wildfire smoke and elevated PM2.5 concentrations are expected to persist through the weekend. Forecast updates will continue daily until this smoke event concludes.