10/15/2021 Forecast Update
FORECAST SUMMARY:
FORECAST SUMMARY: Friday, October 15th, 2021 through Monday, October 18th, 2021
Ozone: Ozone concentrations are expected to be Good for Michigan this weekend and going into next week.
PM-2.5: There will be some hourly Moderate concentrations of PM-2.5 for today, Friday, but will return to Good for the rest of the weekend.
FORECAST DISCUSSION:
Fall temperature norms continue through the weekend after a mid-October warmup earlier this week. Upper-level temperatures hang around 10 degrees Celsius for much of today, Friday, before dropping to near-zero for the remainder of the weekend and into early next week. Upper-level winds will be from the NW for the weekend, which is a reasoning behind the return to Fall temperature norms.
Like said above, Fall temperatures continue through the weekend with surface temperatures in the upper-50s to low-60s Fahrenheit. A Low-pressure system and accompanied frontal boundary will make its way through Michigan today, bringing rain showers for much of today, Friday. This, too, is a reasoning behind the Fall-like temperatures this weekend and will shift surface winds to WNW for the remainder of the weekend.
In terms of concentrations, Ozone shouldn’t be of any concern this weekend as upper-level temperatures plummet to near-zero, surface temperatures returning to seasonal norms, and winds coming from the WNW. PM-2.5 concentrations will have hourly concentrations in the Moderate range in some areas today, Friday. As the Low-pressure and frontal boundary moves through Michigan, the PM-2.5 concentrations will filter out. Therefore, PM-2.5 concentrations will be in the Good range for remainder of the weekend and going into next week.
EXTENDED FORECAST:
Early next week provides more of the same conditions that we will see Saturday and Sunday with seasonally normal temperatures and Good concentrations.