FORECAST SUMMARY: Friday, November 7, 2025 through Monday, November 10, 2025
PM-2.5: 24-hour average Fine Particulate concentrations are expected to be mostly Good (AQI Green) to scattered Low Moderate (AQI Yellow).
FORECAST DISCUSSION
The biggest feature of the weekend forecast will be a preview of our upcoming winter weather. The dreaded “S” word has finally made it as part of the forecast discussion. Snow is expected to finally arrive Saturday night with greatest accumulations, 1 to 2 inches, occurring along or just south of a line running from Kalamazoo to Lansing. Models indicate most accumulations would occur between midnight and sunrise Sunday.
With the marginally freezing temperatures and abundance of moisture, I expect that snow to be wet and sloppy with resulting accumulations likely minimal as the ground is still relatively warm. Thus, we will likely see more snow in the air than on the ground.
By Sunday night, we transition from synoptic snow (i.e. low pressure related) to Lake Effect snow. Snow will be much fluffier as we experience cold north-northwesterly flow over the relatively warmer waters of Lake Michigan. This will keep the majority of the accumulations limited to the southwest Lower Peninsula lakeshore counties. The persistence of these winds and snow showers will likely linger into Monday and possibly affect the Monday morning commute. Temperatures should rebound enough during Tuesday to keep any lingering precipitation in liquid form.
Air Quality should not be an issue as fine particulate matter levels stays Good with a few scattered Low Moderates.
EXTENDED FORECAST:
Air Quality is expected to remain Good to Low Moderate entering the upcoming work week.