9/13/2021 Forecast Update
FORECAST SUMMARY:
Monday September 13th, 2021, through Friday September 17th, 2021
Ozone: 8-hour average Ozone concentrations are expected to be mostly Good with some scattered Moderates during the latter half of the work week.
PM-2.5: 24-hour average Fine Particulate concentrations are expected to range from Good to Low Moderate.
FORECAST DISCUSSION
Monday and Tuesday will be the most weather active days of the week. During Monday, a stationary front along the Michigan/Indiana border will trigger scattered shower and thundershower activity. That front will advance northward, during Tuesday, as a warm front triggering more active shower/thundershower potential. The trailing cold front with that system should pass late Tuesday to end the active weather. Air Quality should remain Good for both ozone and fine particulates during Monday and Tuesday.
The latter half of the week should contain pleasant weather as high-pressure ridging builds in behind the cold front. As we get into southerly flow by the end of the week, we will experience a warming trend that could reach well into the upper 80’s by the end of the weekend. Even though the days are getting shorter with cooler nights, a few hours of southwest winds, under sunny skies, could push us into the High Moderate range for ozone along our western lakeshore and northeast of Detroit.
As such, I will be updating this forecast on Friday.
EXTENDED FORECAST:
Air Quality is expected to be Good to Moderate during the weekend. Monday and early next week will be unseasonable warm with Good to Moderate Air Quality.