Current Alerts & Advisories
A Statewide Air Quality Alert remains in effect for Monday, July 14, due to Fine Particulates (PM-2.5).
An Air Quality Advisory for Ozone is in effect for Tuesday, July 15, in the following Southeast Michigan counties:
Livingston, Macomb, Monroe, Oakland, St. Clair, Washtenaw, and Wayne.
Pollutant Overview
Ozone (O₃):
8-hour average concentrations will range from Good (Green AQI) to Moderate (Yellow AQI) across most of the state.
Unhealthy for Sensitive Groups (Orange AQI) is expected in Southeast Michigan on Tuesday.
Fine Particulates (PM-2.5):
Early in the week, levels are expected to be Moderate (Yellow AQI).
Conditions should improve midweek, with a mix of Good (Green AQI) and Moderate levels expected statewide.
Forecast Discussion
Another episode of elevated wildfire smoke affected Michigan over the weekend, leading to alerts that extend through Monday. The heaviest smoke is now shifting east into Ontario, but Michigan will remain under alert until conditions fully clear. By Tuesday, air quality is expected to improve statewide, though brief morning impacts may still occur in the far western Upper Peninsula.
A separate smoke plume over northern Minnesota is not expected to reach Michigan. No additional wildfire smoke-related issues are forecasted at this time, but conditions will continue to be monitored and updated as necessary.
Tuesday Ozone Advisory
Weather conditions on Tuesday, July 15, will be favorable for ozone formation in Southeast Michigan, including:
High temperatures near 90°F
Sunny skies
Light winds
Dew points in the mid-60s
These conditions can lead to elevated ozone concentrations, prompting the issuance of an advisory. Sensitive groups should limit prolonged outdoor activity. A change in weather is expected Wednesday afternoon, bringing cloud cover and rain ahead of a cold front, which should end this brief ozone event.
Extended Outlook
A cold front is forecasted to pass through Thursday, bringing:
Cooler temperatures
Lower humidity
Improved air quality
No air quality issues are currently expected for the upcoming weekend.