FORECAST SUMMARY: Monday, May 5, 2025 - Friday, May 9, 2025
Ozone: 8-hour ozone concentrations are expected to be in the Good (Green AQI) range through the period.
PM-2.5: 24-hour daily average Fine Particulate concentrations will average mostly Good (Green AQI).
FORECAST DISCUSSION:
Michigan is placed between two weather systems early this week: high pressure north of the Great Lakes region and a low-pressure area spinning in the Ohio Valley. High pressure dominates conditions across much of the Upper Peninsula on Monday and Tuesday. Up north, nice springtime weather conditions can be expected with sunshine and temperatures in the upper 60s to around 70 degrees. However, the Lower Peninsula will be influenced by the low, with cooler temperatures anticipated along with chances for showers, especially later Monday into Tuesday. On Wednesday, a weak cold front sinks north to south across the state. Not much in the way of precipitation is expected, but temperatures will cool, especially across the north. High pressure then sinks in from Canada to end the workweek. Sunshine is expected along with temperatures increasing towards the 70-degree mark.
As for air quality, this forecast period begins with Good levels. Forecast maps show a northerly surface and upper-level flow remaining in place throughout this forecast period, and this should translate to generally Good air quality conditions across the region.
EXTENDED FORECAST:
The extended weather models show high pressure dominating the start of the weekend, but a weak boundary could bring scattered precipitation back into the forecast late Saturday into Sunday. During the period, high temperatures should range from the upper 60s to the low 70s. Air quality conditions could see an uptick into the moderate range late in the weekend.
Next Forecast update: Friday, May 9, 2025