FORECAST SUMMARY: Monday October 24, 2022, through Monday October 31, 2022
OZONE:
8-hour average Ozone concentrations are expected to be mostly Good.
PM-2.5:
24-hour average Fine Particulate concentrations are expected to be Good to Low Moderate early in the week, transitioning to Good by midweek.
FORECAST DISCUSSION:
It is always a joy when Indian Summer and Michigan peak color change occur at the same time. The warmer weather and clear skies did trigger some ozone creep into the low 60 ppb range during Saturday and in the 50’s during Sunday. That is higher than normal, for this time of year, but did not cause any additional damage to our ozone attainment design values. PM-2.5 values are also currently running in the Moderate range, which may be due to some overhead smoke filtering down.
Monday and Tuesday will be the last days of the warmer weather. A slow-moving front, just west of the Mississippi River, at the time of this Monday morning forecast, will continue to track eastward. Shower activity is likely during Tuesday as this front approaches. As the front progresses across Michigan, Wednesday morning, expect a wind shift from southerly to northwesterly. High pressure and clearing skies will settle in behind the front for late week and the weekend yielding daily high temperatures in the 50’s and nighttime lows in the upper 30’s. Perhaps perfect weather for football and Halloween weekend activities?
EXTENDED FORECAST:
Although we are losing our Indian Summer by midweek, Air Quality is expected to be mostly Good after Tuesday.
Forecast updated by Jim Haywood. Next Forecast update is on Monday, October 31st, 2022.