FORECAST SUMMARY: Saturday July 1st, 2023 through Sunday July 2nd, 2023
OZONE: Ozone concentrations are expected to be in the Moderate to USG range.
PM-2.5: PM-2.5 concentrations are expected to be in the Moderate to hourly USG range.
FORECAST DISCUSSION:
Continued and welcomed air quality improvement has been seen in the overnight hours for PM-2.5 and Ozone. PM-2.5 values still appear to be in the mid-to-high Moderate range this morning and will continue to hang around those values throughout the day. Occasional jumps into the USG range should be expected as firework displays will be aplenty throughout the weekend and will add to PM-2.5 concentrations. The PM-2.5 values we saw earlier this week are not expected to occur later this weekend, but as stated above, occasional increase into the USG range should be expected. Winds shift to more southerly flow throughout the day which will continue to improve PM-2.5 values as concentrations to our south in Illinois and Indiana are Good and Moderate. This is a reason for not continuing the PM-2.5 alert into tomorrow as concentrations will continue to drop into the Moderate range. However, these shifts in winds will present an issue for Ozone for areas in west and southeast Michigan, for this is the reason there is an Ozone Air Quality Alert in place for those areas today. All other alerts will end at midnight tonight and tomorrow will not have any Air Quality Alerts.
This forecast will be updated tomorrow, Sunday, morning to look ahead at potential Ozone issues for Monday.
EXTENDED FORECAST: We look ahead to early next week and the 4th of July holiday which will have potential Ozone issues and considerably less smoke.
Next Forecast Update: Sunday July 2nd, 2023