FORECAST SUMMARY: Friday, July 12th, 2024, through Saturday, July 13th, 2024
OZONE:
Ozone concentrations are expected to be in the Moderate (Yellow AQI) range across the state with the exception of southeast Michigan where USG (Orange AQI) concentrations are expected.
PM-2.5:
PM-2.5 concentrations are expected to be in the Good (Green AQI) to low-Moderate (Yellow AQI) range.
FORECAST DISCUSSION:
Michiganders wake up this morning to a mixed bag of weather with many under clear skies and a bright sun, whereas others are dealing with pop up showers due to the heat and lingering humidity. These pop-up storms should be expected throughout today and tomorrow as the aforementioned heat and humidity provide fuel for the atmosphere to kick up showers and storms. The majority of Michigan, however, should experience clear skies and warm temperatures throughout this weekend as a High-pressure system sits over us tomorrow, Saturday. Surface temperatures are expected to range in the 80s near the surface with upper-level temperatures in the mid-teens Celsius. Winds, both surface and upper level, are showing southwesterly flow over the state with a possibility of stagnation in the metro Detroit area. The combination of clear skies, warm temperatures throughout the atmosphere and light winds, USG level Ozone concentrations are expected for southeast Michigan, therefore, an Air Quality Advisory has been issued for tomorrow, Saturday for these areas.
West Michigan will be under similar conditions but with stronger winds speeds and winds over Lake Michigan are expected to stay southerly. So Ozone that produces over the lake via transport will stay over the lake, unless a lake breeze sets up and brings some concentrations inland. Hourly concentrations in the USG range can be expected in the Lake Michigan shoreline communities, but overall 8-hour averages should remain in the high-Moderate range.
PM-2.5 concentrations are expected to remain in the Moderate range, as lingering wildfire smoke stays out to our west over Minnesota.
EXTENDED FORECAST:
The next line of storms across Michigan is looking to occur Sunday, which may help clean out our airmass.
Next Forecast update: Saturday, July 13, 2024