An Alberta clipper along with developing trough of low pressure tailing from the Hudson Bay will bring a quick hitting snow to the Midwest. The main piece of energy (The Alberta clipper) will emerge into the Dakotas late tomorrow afternoon and scream on southeastward. A couple inches can be expected in this area. The "heavier" snow will occur with the area of low pressure begins to pivot more in a eastward fashion. This "pivot" will tend to make the snow last longer, and accumulations will therefore be higher, see darker shaded area on left.
Furthermore, there looks to be a very narrow band of heavier amounts to set up somewhere in central Wisconsin to central Michigan. Right now the band looks to set up in the darker blue shaded region on the map above. Expect winter weather advisories to be posted either tomorrow morning or tomorrow afternoon. The snow will effect the Tuesday morning commute, so be sure to check back for updates!