FORECAST SUMMARY: Monday, April 21, 2025, through Friday, April 25, 2025
OZONE: 8-hour average Ozone concentrations are expected to be Good (AQI Green).
PM-2.5: 24-hour average Fine Particulate concentrations are expected to be mostly Good (AQI Green) with scattered Low Moderate (AQI Yellow).
FORECAST DISCUSSION
Low pressure, with associated cold front, enters the Lake Michigan region late Monday morning and will continue to track off to the northeast. Isolated showers and storms have developed, earlier this morning, with generally widespread precipitation. Drier air should limit precipitation opportunities, Monday afternoon, and winds will remain gusty throughout the day.
High pressure follows Monday’s frontal passage making Tuesday likely the nicest day of the week to be outdoors. Sunny skies are expected with afternoon temperatures reaching the mid-60’s.
A weak warm front lifts into the region Tuesday night with a chance for shower development overnight and possibly into early Wednesday. The southern counties could see temperatures push toward 70 degrees during Wednesday with the best chance of the week to see scattered fine particulate matter in the Moderate range, mostly in the urban areas.
Precipitation chances increase Thursday night into Friday as a low-pressure system moves into the Midwest bringing the potential for both showers and thunderstorms. Conditions then dry out for the weekend as high pressure moves back into the Upper Great Lakes region.
All in all, the work week looks reasonably quiet, with several chances for scattered precipitation and I do not see any serious concern with Air Quality. PM-2.5 will be a mix of mostly Good to scattered Low Moderate. Ozone concentrations are expected to be Good throughout the week.
EXTENDED FORECAST:
Air Quality is expected to continue being mostly Good to scattered Low Moderate going into the upcoming weekend.
Next Forecast update: Friday, April 25, 2025