6/17/2020 Forecast Update
FORECAST SUMMARY:
Wednesday, June 17th, 2020 through Thursday, June 18th, 2020
OZONE: 8-Hour average Ozone concentrations will be mostly Moderate on Wednesday transitioning to Moderate and USG on Thursday.PM-2.5: 24-hour average Fine Particulate concentrations will be mostly Good to Low Moderates through the week.
AN ACTION DAY ADVISORY IS ISSUED FOR THE FOLLOWING MICHIGAN COUNTIES for THURSDAY...IN WEST MICHIGAN:
ALLEGAN, BERRIEN, CASS, KENT, MUSKEGON, OCEANA, OTTAWA, MASON, AND VAN BUREN COUNTIES.
FORECAST DISCUSSION
Tuesday was a mixture of Good and Moderate throughout the state. This pattern will continue through Wednesday with a possibility of isolated USG’s as air pollutants continue to accumulate under the same air mass.
Each day, this week, has gotten progressively worse as temperatures and humidity slowly increase and air pollutants accumulate. As such, I am issuing an Air Quality Advisory in both Southeast and West Michigan for Thursday. There is a good chance that this will carry over into Friday, but we will make that call on Thursday after reviewing the latest computer model runs.
There is a chance for scattered precipitation on Saturday, but we will not see a change in air mass until early next week.
EXTENDED FORECAST:
Air Quality should remain mostly Moderate to USG to the end of the work week.