FORECAST SUMMARY: Thursday July 11th, 2024, through Friday July 12th, 2024

OZONE:

Ozone concentrations are expected to be in the Moderate (Yellow 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:

After the remnants of Hurricane Beryl dropped numerous inches of rain across the entire state, we look to dry out today, Thursday, and into tomorrow. A high-pressure system slides into the region throughout today and into the weekend which will provide quite a bit of sunshine for the Great Lakes throughout the weekend. Surface temperatures start to rebound today with humid air sticking around due to Beryl bringing in ample atmospheric moisture. The combination of warmer temperatures and high humidity will cause heat indexes to return to the 90s later this weekend and into next week. Upper-level temperatures remain somewhat cooler but see an increase as we approach the weekend.

For air quality, PM-2.5 concentrations are expected to hang around the Moderate range with Canadian wildfire smoke off to the west over Minnesota and northern parts of Wisconsin. The smoke to the west does not seem to be dense, nor is it expected to approach Michigan. If anything, the western upper peninsula may see a slight increase in PM-2.5 near the surface. For Ozone, today and tomorrow look to be “ramp up” days for Ozone development as both surface and upper-level temperatures increase. The High-pressure will provide ample sunlight for Ozone to develop, along with shifting winds from southeasterly to southwesterly. Both of these directions can be troublesome for metro Detroit and the Lake Michigan shoreline, respectively. Due to High-pressure moving in and winds shifting, I will be updating this forecast tomorrow, Friday, and more than likely on Saturday as well. 

EXTENDED FORECAST:

High-pressure moves in with a temperature increase and humidity.

Next Forecast update: Friday, July 12th, 2024