FORECAST SUMMARY: Monday September 30th, through Friday October 4th, 2024
OZONE:
Ozone concentrations will be Good .
PM-2.5:
PM-2.5 concentrations are expected to be in the Good to low-Moderate range.
FORECAST DISCUSSION:
Most of us Michiganders woke up to sun this morning while others woke up to overcast skies and fog. Central Michigan and northward are sitting under clear skies whereas southern Michigan has a persistent cloud deck which is expected to dissipate as the day carries on. Much alike last week, we’ll see both similar surface temperatures, although slightly cooler, and partly cloudy to sunny skies for most of the week. There appears to be two days with rain chances with the first being tomorrow, Tuesday as a cold front moves through the Great Lakes region. The rain showers will be rather widespread and nothing too alarming in terms of amount of rain. Once the cold front moves out, Wednesday and Thursday will see clear skies thanks to a High-pressure system setting up to our south. Come Friday, however, will see the same High-pressure move towards the southeast which will open the door for a Low-pressure system, associated cold front, and chances for rain. This system may pose higher amounts of rain compared to Tuesday, but not a complete washout as the rain will begin to taper off in the Friday evening timeframe.
For air quality, as we round out September and start October this week, we enter the last month of the designated Ozone season with Good Ozone concentrations expected. Temperatures will barely reach the mid-70s this week, which is nice for a slightly above-normal high temperature and keeping Ozone at bay. For PM-2.5, early morning commute hours may pose some hourly Moderate concentrations, but overall daily average should remain in the Good to low-Moderate range. There looks to be a chance of upper-level smoke entering the region midweek but will stay in the upper atmosphere and may create some milky skies and colorful sunrises and sunsets.
EXTENDED FORECAST:
Once the Low-pressure and cold front move out of the region Friday, a High-pressure sets up for next week providing clear skies for the first weekend of October.
Next Forecast Update: Friday, October 4th, 2024