FORECAST SUMMARY: Monday, April 27, 2026 - Friday, May 1, 2026
Ozone: 8-hour average Ozone Particulate concentrations are expected to be Good (AQI Green) through the forecast period.
PM-2.5: 24-hour daily average Fine Particulate concentrations will average mostly Good through the week.
FORECAST DISCUSSION:
After a dry and pleasant weekend, rain and thunderstorms will move in Monday afternoon and evening as a storm system approaches from the Plains. Gusty southeast winds will help keep temperatures on the warmer side for one more day. Rain becomes more widespread Monday night before gradually tapering off on Tuesday, though scattered showers may linger. Another system passing south of Michigan late Tuesday into early Wednesday will bring the better chances of rain to areas farther south. For the second half of the week, only small chances for spotty afternoon or early‑evening showers remain. Cooler temperatures will settle in, and with colder nights expected mid to late week, frost or even freeze conditions may develop.
Air quality will start the week in the Good range for both ozone and fine particulate matter. Strong winds will keep the atmosphere well mixed, which helps maintain Good particulate levels, while cloud cover will limit ozone formation. An upper level trough will bring cooler temperatures and shift winds to a northerly direction. Under this pattern, air quality is expected to remain Good through the rest of the week.
EXTENDED FORECAST:
High pressure builds in for the upcoming weekend, bringing mainly dry weather across the region. Temperatures will stay on the cool side, but overall conditions look calm and quiet. Air quality is expected to be Good, with no pollution concerns anticipated.
Next Forecast update: Friday, May 1, 2026