FORECAST SUMMARY: Monday April 6th, 2026, through Friday April 10th, 2026
Ozone:
Ozone concentrations are expected to be in the Good (Green AQI) range.
PM-2.5:
PM-2.5 concentrations are expected to be in the Good (Green AQI) to low-Moderate (Yellow AQI) range later in the week.
FORECAST DISCUSSION:
We start off the first full week of April with surface temperatures expected to be at or below normal today, Monday, due to persistent northerly flow. After a rather wet period in the latter half of last week and this past weekend, this week will see a decrease in precipitation for the majority of the week with Thursday and into Friday seeing the most amount of precipitation. First, however, a cold front crossed over Michigan in the overnight hours which shifted winds to northerly flow, as mentioned above. Going into Tuesday, High-pressure sets up over Wisconsin which will clear the skies and lighten the winds, while keeping us below average for surface temperatures. The warming trend starts on Wednesday as winds shift to southerly flow, bringing in warmer air, but will also present some precipitation for the northern half of the state. A wintry mix is expected throughout the day on Wednesday before turning to mostly rain on Thursday. This system will give way to Friday’s system which will impact the entire state with rain as temperature return to the 50s and 60s thanks to a warm front crossing over the state.
For air quality, northerly flow and cooler temperatures for the first half of the week will help to keep concentrations Good. As we get into the latter half of this work week, winds shifting to southerly flow may pose an increase of PM-2.5 into the low-Moderate range. However, rain showers on Thursday and Friday will keep any increases at bay. We typically start to see some Ozone increases in the month of April. This week does not look like it will be a week for Ozone as temperatures will still be too cool. Although, our eyes are now slowly starting to focus more on Ozone development as the temperatures warm.
EXTENDED FORECAST:
The warming trend continues into the weekend as Good to low-Moderate air quality is expected.
Next Forecast update: Friday April 10th, 2026