FORECAST SUMMARY: Monday, July 11th, 2022, through Thursday, July 14th, 2022
OZONE: 8-hour average Ozone concentrations are expected to be Low Moderate to USG during Monday then mostly Good for the remainder of the forecast period.
PM-2.5: 24-hour average Fine Particulate concentrations are expected to be mostly Good for the forecast period.
FORECAST DISCUSSION:
An Air Quality Action Day remains in effect through Monday, July 11th, 2022 for the following counties in west Michigan:
ALLEGAN… BERRIEN… CASS… KENT… MUSKEGON… OTTAWA… VAN BUREN COUNTIES
Monday will prove to be the only day of concern during this forecast period. An advancing cold front has placed the area under warm southwest winds with plenty of moisture. As such, Action Day Advisories have been issued for the southern part of the western lakeshore and Southeast Michigan. The major uncertainty in the forecast was the timing of the approaching cloud cover, especially in Southeast Michigan, which is more likely to stay clear longer into the day.
Once the advancing cold front passes Monday night, the remainder of the forecast period should be pleasant with northerly wind flow, mostly sunny skies, low dew points, and temperatures in the low 80’s.
The next chance of elevated ozone levels comes Friday or Saturday when the winds turn southerly, again, in advance of a late weekend cold front. While it does not yet look like a slam dunk for elevated ozone, it definitely warrants a serious look and re-evaluation later in the week.
EXTENDED FORECAST:
Air Quality should be mostly Good to begin the next work week.
Forecast updated by: Jim Haywood: Monday, July 11, 2022
Next Forecast update: Thursday, July 14, 2022