FORECAST SUMMARY: Monday April 28th, 2025, through Friday May 2nd, 2025
Ozone:
Ozone concentrations are expected to be in the Good to low-Moderate range.
PM-2.5:
PM-2.5 concentrations are expected to be in the Good to low-Moderate range.
FORECAST DISCUSSION:
With the last few days of April upon us, we round off this month with surface temperatures above average in the 70s and quite a bit of sunshine. These temperatures are aided by southerly flow and a rather warm airmass which will be sitting over us today and most of tomorrow, Tuesday. Today will predominantly be dry for most Michiganders with the western upper peninsula seeing rain and potential storms later today. Rain showers and additional storms will cross over the state on Tuesday before exiting the region and opening the skies on Wednesday with the help of a High-pressure system sitting to our north. Although short-lived, the High-pressure will move off to the east and will leave the door open for a Low-pressure and an accompanying frontal boundary which will bring in a few rain showers. The passing of the frontal boundary will drop temperatures down to near-normal temperatures come late Thursday and into Friday. Friday looks to have lingering showers throughout the day with northeasterly winds providing near-normal temperatures for early May.
For air quality this week, temperatures well into the 70s on Monday and Tuesday will allow for Ozone to likely develop into the Moderate range, especially on Monday with ample sunlight. Late day clearing on Tuesday may allow for low-Moderate concentrations of Ozone, but nothing more than that. Throughout the week, multiple rounds of rain showers across the state will help keep Ozone at bay with cloudy conditions helping even more so. Unfavorable winds, northerly, for Ozone development will also help keep concentrations at bay this week. For PM-2.5, low-to-mid Moderate concentrations can be expected early this week due to southerly flow. Thankfully, however, breezy conditions will be in place to keep the air moving and dispersing, so stagnation should not be an issue to let PM-2.5 concentrations pool in more urban areas. Rain showers throughout the week will help keep PM-2.5 concentrations at bay as well.
EXTENDED FORECAST:
Seasonal normal temperatures are on the horizon this week with clear skies to kick off the month of May. Air quality will remain in the Good to low-Moderate range.
Next Forecast update: Friday May 2nd, 2025