FORECAST SUMMARY: Friday October 25th through Monday October 28th2024
OZONE:
Ozone concentrations are expected to be in the Good range.
PM-2.5:
24-hour daily average Fine Particulate concentrations will average between Good and Low-Moderate.
FORECAST DISCUSSION:
Although cooler, another Pure Michigan Fall weekend is in store after most of us woke up to rain this Friday morning. This rain was accompanied by a cold front, hence the slight cool down we will see today and into tomorrow. Once the Low-pressure carrying the cold front moves off to the east, a High-pressure system fills in behind it throughout the day tomorrow, Saturday. High temperatures will hang right around normal, with slightly below normal in some areas, tomorrow as the High-pressure moves in bringing north to northwesterly winds. As the High-pressure traverses through the Midwest and into the Ohio River Valley, winds will shift to more southerly flow which will provide us a warmup going into Sunday. Accompanying this High-pressure will be clear skies for most areas on Saturday and Sunday. As we round out the weekend and head into Monday, Michigan will be sandwiched between two pressure systems, one Low and the other High. For the beginning half of the week, we will be in the warm sector of those pressure systems with the 70s returning to the Great Lakes State. Along with the warmth, conditions will be rather breezy as being between two pressure systems increases the pressure gradient thus causing gusty winds. In these situations, wind blows from High-pressure to Low-pressure, so since the position of the High-pressure will be south of Michigan, warm air will be pushed into the state.
For air quality, after Friday’s rain a good cleanout of concentrations occurred for both Ozone and PM-2.5. Ozone will continue to remain in the Good range as the Ozone season ends on Thursday, October 31st. PM-2.5 concentrations will hang around the Good range, but once winds shift to more southerly flow, PM-2.5 concentrations may increase but only into the low-Moderate range.
EXTENDED FORECAST:
We will see the 70s return to start off next week with overall air quality remaining Good.
Next Forecast Update: Monday October 28th, 2024