05/06/2019 Forecast Update

FORECAST SUMMARY: Monday, May 6th, 2019 through Monday, May 13th, 2019

Ozone: 8-hour Ozone concentrations will be Good.

PM-2.5: 24-hour Fine Particulate concentrations are expected to be mostly Good with only a few periods of possible low Moderates.


Precipitation is in the forecast Monday/early Tuesday as a cold front move through.  This boundary stalls south of the state before moving back north Wednesday bringing precipitation back in the forecast.  Precipitation chances linger Thursday as a low develops along this boundary and tracks northeast across the state.  High pressure builds in Friday drying conditions out for the end of the week.

As for air quality, fine particulate levels early Monday were ranging between upper Good and low Moderate.  Readings will improve as the front passes with mostly Good averages for the day; however, the southeast may remain low Moderate.  Northeast/easterly winds Tuesday into Wednesday will keep fine particulate in the Good range.  Weaker winds for a time Thursday may allow for a few low-Moderate fine particulate readings, otherwise levels will be Good through Friday.

Clouds, precipitation chances, and lower temperatures will keep ozone Good through the workweek.


Extended models show high pressure in place most of Saturday but a front passes during the night bringing chances for rain.  High pressure builds back in early next week with cooler temperatures expected.  Low-Moderate fine particulate is possible, mostly in the southeast, on Saturday; otherwise both fine particulate and ozone will be Good.

Next forecast update: Monday, May 13th, 2019
Updated by: Stephanie M. Hengesbach, Meteorologist, Michigan Department of Environment, Great Lakes, and Energy