FORECAST SUMMARY: Friday, September 19, 2025 through Monday, September 22, 2025
OZONE: 8-hour average Ozone concentrations are expected to be mostly Good (AQI Green) to Moderate (AQI Yellow).
PM-2.5: 24-hour average Fine Particulate concentrations are also expected to be Good (AQI Green) to Moderate (AQI Yellow).
FORECAST DISCUSSION
As of Friday morning, Michigan lies beneath an upper-level ridge with a digging low-pressure trough across the northern plains. As the upper-level ridge advances eastward, the low-pressure trough will work its way into our region during the weekend. A warm front associated with the approaching trough will work its way through Saturday morning and afternoon, which will likely bring some showers and storms to the area with the best chances along the western lakeshore. Better chances for precipitation arrive Saturday night into Sunday with chances for precipitation lingering through Monday.
In terms of Air Quality, I am not anticipating any issues and AQI levels should range between Good and Moderate through the forecast period.
Fall officially arrives on Monday September 22. Farewell summer 2025… With the exception of the wildfire smoke, you will be missed!
EXTENDED FORECAST:
Air Quality is expected to remain Good to Moderate entering the upcoming work week.