FORECAST SUMMARY: Friday, April 4, 2025, through Monday, April 7, 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 a mixture of Good (AQI Green) to scattered Low Moderate (AQI Yellow).
FORECAST DISCUSSION
High pressure will remain centered over the Great Lakes, during Friday, and will maintain dry conditions and seasonal temperatures through late afternoon. The center of the high will drift across the northern Great Lakes, today, maintaining an easterly component and light winds.
Another low-pressure system will pass through the already battered mid-south states during Saturday and Sunday. While most of our forecast area should receive some additional rainfall, the best chance of significant rain will be south of our border. The border counties up to I-94, however, could see up to 1.25 inches of additional rain. The timing of that event could begin late Friday afternoon or early evening with the heaviest showers tonight into early Saturday morning.
Colder air will begin to move in Saturday night into Sunday due to a strong upper-level low approaching through southern Canada. As that low moves eastward during Monday and high pressure builds in behind it, cold northerly air will stream in keeping daytime high temperatures around 40 degrees during Monday and Tuesday. As the center of the high-pressure ridge passes during mid-week, the forecast region returns to southern air flow and warming temperatures.
All in all, next week looks considerable quieter than what have been experiencing the past couple of weeks. From an Air Quality perspective, I do not see any issues for the weekend or early next week. PM-2.5 will be a mix of mostly Good to scattered Low Moderate with Ozone concentrations expected to be Good.
EXTENDED FORECAST:
Air Quality is expected to be mostly Good to scattered Low Moderate going into the upcoming work week.