First light accumulation?

For the time being today, there shouldn't be much precipitation other than the lake effect rain band that's about to move through the area. What precipitation falls today will be rain, perhaps with some sleet mixing in in the stronger showers. Then, in the late afternoon, an upper level low and accompanying cold pool will move to the north of the area. This will allow for numerous showers to form. These showers will start out as rain, then mix in with snow overnight.
Tomorrow, the showers will continue to be numerous as the cold pool (along with a shortwave) provides sufficient instability to allow for showers to form. The showers will end up transitioning to all snow by Sunday Afternoon as a strong cold front will pass through the area overnight tonight.

Also, these snow showers will have some lake enhancement. The winds will mean that the heaviest snow will fall along and south of the Detroit area. However, that won't make a lot of difference in this event, as almost everyone should see some snow, and roads will be too warm for any accumulation.

Chance of Snow: 80%
Temperatures will be cold enough for snow by tomorrow afternoon, and possibly tonight and tomorrow morning. Precipitation coverage will be high, so therefore there is a high chance of snow with this event.

Chance of a Snow Day: 0%
The roads will be too warm for any accumulation. Even if they weren't, there wouldn't be enough snow for there to be any chance of a snow day.

Predicted Accumulation:
-On warm surfaces (Roads, etc.): None. They will still be too warm for any accumulation.

-On cold surfaces (Grass, Car roofs, etc.): 0.5 inches. Snow showers will likely be heavy enough for some light accumulations on cold surfaces. If Lake Orion gets a heavier snow shower, we may even see up to a quick inch of accumulation. I will be measuring snow accumulation on my car roof for this event.

Bottom Line: A chance for almost everyone in Southeast Michigan to see their first snow.