FORECAST SUMMARY: Wednesday, June 7th, 2023, through Thursday, June 8th, 2023
OZONE: Ozone concentrations are expected to be in the Good to Moderate range.
PM-2.5: PM-2.5 concentrations are expected to be in the high Moderate range to USG, with some hourly concentrations in the Unhealthy range.
An Air Quality Action Day Advisory for Fine Particulate has been issued for Wednesday, June 7th into Thursday, June 8th, for some southern Michigan counties.
FORECAST DISCUSSION:
An Air Quality Action Day Advisory has been called for some southern Michigan counties due to elevated levels of Fine Particulate, or PM-2.5. Concentrations are expected to be in the USG range for many areas across southern Michigan due to Canadian wildfire smoke being brought into the area by northerly winds. Some hourly values may even eclipse the Unhealthy range threshold. Relatively light but persistent NNE winds will continue to push wildfire smoke from Canadian fires into our area for the coming days. A high-pressure system is dominating the area and is currently expected to stay over the Wisconsin/Upper Peninsula border until Friday which will continue the NNE winds. Earlier this week, Quebec, Canada fires were the driving emitter of wildfire smoke across the Midwest, but now it appears fires have sparked in northern Ontario. With NNE winds in place, smoke from Ontario fires will be brought to our area at least through tomorrow, Thursday. Because of this, the forecast will be updated tomorrow and on a day-to-day basis until the wildfire smoke subsides.
High PM-2.5 concentrations will be across the state of Michigan with Moderate concentrations in the northern lower peninsula and into the upper peninsula. When this forecast is updated, it will be determined if additional areas will need to be included in the Air Quality Advisory.
EXTENDED FORECAST:
Wildfire smoke looks to persist for the coming days, so overall air quality will remain Poor.
Forecast updated by: Alec Kownacki: Wednesday, June 7th, 2023
Next Forecast update: Thursday, June 8th, 2023