FORECAST SUMMARY: Tuesday June 18th, 2024, through Wednesday June 19th, 2024
OZONE:
Ozone concentrations are expected to be in the high-Moderate (Yellow AQI) to Unhealthy for Sensitive Groups (Orange AQI) range.
PM-2.5:
PM-2.5 concentrations are expected to be in the Good (Green AQI) to Moderate (Yellow AQI) range.
FORECAST DISCUSSION:
Clouds slowly move through the state today, Tuesday, as the current heat wave continues. Although cloudier today, surface temperatures and humidity will rival yesterdays with heat indices still expected to approach 100 degrees in some areas. Ozone concentrations today are expected to be lower than yesterdays, but only slightly. Mid to high Moderate concentrations can be expected today with a possible hourly USG reading, but overall 8-hour averages should be in the high-Moderate range. An Air Quality Advisory is being issued for tomorrow, Wednesday, for west Michigan areas due to Ozone expected to exceed USG-level concentrations. Clouds look to erode in the early afternoon in the west Michigan area which will allow for Ozone to tap into sunlight along with the already warm airmass. To aid in the development, winds will predominantly be southwesterly with upper-level temperatures in the upper teens Celsius, which is prime for Ozone development. Numerous cloud models show clouds hanging around metro Detroit, tomorrow, longer, and more persistently compared to west Michigan. Due to the heat, humidity, possible peaks in between clouds and existing airmass, there is a chance for high Moderate concentrations tomorrow in the metro Detroit area.
PM-2.5 concentrations look to remain in the Good to Moderate range statewide.
EXTENDED FORECAST:
Winds look to shift to more north/northeasterly for Thursday, which may provide some relief in terms of air quality. This will be looked at further Wednesday morning.
Next Forecast update: Wednesday June 19th, 2024