FORECAST SUMMARY: Friday, December 10th, 2021, through Monday, December 13th, 2021

PM-2.5:

Overall PM-2.5 concentrations are expected to be Good for Michigan this weekend.

FORECAST DISCUSSION:

Friday, December 10th, will be a pleasant December day with overcast skies and temperature highs ranging from the mid-20s to mid-30s Fahrenheit. Surface winds start out from the west today, Friday, then quickly shift to more northeasterly as the day goes on due to an approaching Low-pressure system. This Low-pressure system will make its way into the Great Lakes region overnight and into Saturday morning. Southern-Mid Michigan receives a warmup into the low-50s Fahrenheit Saturday morning from the warm front associated with this system. Behind the warm front is a cold front, also associated with the Low-pressure system, so temperatures will drop to the low-mid 30s Fahrenheit for all of Michigan by Saturday evening.

High winds are also associated with this system. Wind Advisories have been issued all around Michigan in recent days which go into effect Saturday morning. In terms of precipitation, mid-southern Michigan will receive mostly rain throughout the day Saturday. Whereas northern-lower Michigan and the Upper Peninsula will receive snow with some portions of the Upper Peninsula in the 8-10 inches range. With the approaching Low-pressure system and associated winds, PM-2.5 concentrations will not be of concern. Any buildup of concentrations in recent days, which has been seen, will effectively be washed out with the approaching system.

EXTENDED FORECAST:

Going into next week, concentrations continue to look Good with a slight warm up in temperature on the horizon.

Forecast updated by: Alec Kownacki, Friday December 10th, 2021. Next Forecast update: Monday December 13th, 2021