FORECAST SUMMARY: Monday December 5, 2022, through Monday December 12, 2022

PM-2.5: 24-hour average Fine Particulate concentrations are expected to be Good to Moderate for the duration of the forecast period.

FORECAST DISCUSSION:

Southwest flow over our area, on backside of a surface high that is now located over the mid-Atlantic coast, will bring a gradual increase in moisture/clouds today.  Low pressure moving across Ontario will push a weak cold front through the region this afternoon through Tuesday. Along with increasing clouds today, we will see by a chance of light rain this afternoon as the front moves southeast. 

Once this system passes, expect calm conditions with temperatures at or above average for this time of year.  With increasing stagnant air and increased burning of fuels for heating, we can also expect an increase of fine particulates during mid-week.  It will likely start in Southeast Michigan, because of the increased population base, and spread through the rest of the lower half of the Lower Peninsula.

A stronger system is expected at the end of the work week which should clean out the atmosphere for the remainder of the forecast period. 

EXTENDED FORECAST:

Air Quality should be mostly Good to begin the next work week.

Next Forecast update: Monday, December 12, 2022