FORECAST SUMMARY: friday, may 26, 2023, through sunday, may 28, 2023
OZONE: 8-hour average ozone concentrations are expected to be mostly Good with the potential for gradual increasing into the Moderate range by the end of the weekend.
PM-2.5: 24-hour average Fine Particulate concentrations are also expected to be mostly Good through the forecast period.
FORECAST DISCUSSION:
The current dry weather pattern will remain locked in place through the long weekend and into the early and midweek period next week with high pressure established over the Great Lakes region. The wind regime for the holiday weekend will be generally easterly with daytime highs in the 70’s and chilly nighttime lows in the 40’s/50’s. The humidity will be low with dew points in the 40’s under persistently clear skies.
This should provide Good Air Quality, for the most part, although areas west of Detroit may see a creep in ozone values due to stagnation as the weekend progresses. A warmup starts on Monday with temperatures rising into the mid-80’s. Winds will still be from the northeast and dew points are still low, but sitting under the same air mass for several days could start yielding more stagnation pollution.
For that reason, this forecast will be updated Sunday morning to make sure Monday stays under USG levels. Currently, Tuesday is the real day of concern as the winds become more southerly with increasing temperatures and humidity. Sunday’s forecast will also give a better idea of what we can expect for Tuesday.
EXTENDED FORECAST:
Air Quality should be generally Moderate to begin the next work week.
Next Forecast update: Sunday, May 28, 2023