FORECAST SUMMARY:
Friday, May 28th, 2021 through Tuesday, June 1st, 2021
Ozone: 8-hour average Ozone concentrations are expected to be mostly Good through the forecast period.
PM-2.5: 24-hour average Fine Particulate concentrations are also expected to be mostly Good with a small chance of Moderate Monday and Tuesday in the urban and transport areas.
FORECAST DISCUSSION:
A low-pressure system along the Illinois and Indiana border is providing stiff, cool, wet northeast winds Friday morning. As that system slides eastward, it will be replaced by advancing high pressure, which will keep our winds from a clean northeast direction Saturday and Sunday. Air Quality will remain Good.
As the high pressure migrates eastward, we will begin to come under southwesterly winds and a gradual warm up during Monday. Since the background Air Quality will still be Good and temperatures still relatively cool, the threat of any significant ozone is small. We could, however, see some small build-up of fine particulates along the lower Lake Michigan shore and Detroit areas. At worst, these should be Low Moderate.
All in all, the holiday weekend should be cool and pleasant once the high pressure moves in on Saturday and the Air Quality should be mostly Good through the forecast period.
EXTENDED FORECAST:
Air Quality should be mostly Good going into the next work week.