As bitterly cold air moves into the Northern Plains link, a temperature gradient will set up across eastern Montana, setting up the stage for further snow across the Plains and Midwest.

A surface low will begin to deepen along this gradient by the weekend, and continue to strengthen as it pushes across the Plains and into the Midwest through the day Saturday. By Sunday morning, residents of Chicago could be waking up to falling snow. Models are also showing the possible snow across much of Wisconsin, Michigan, northern Illinois, and northern Indiana.
By later in the day on Sunday, most of the snow will be heading towards to Northeast, leaving cold air and lake-effect snow in its wake.

While this system moves across cities that were impacted by heavy snow last weekend, this upcoming system won't be quite as powerful. However, we can expect a wide swath of snow from eastern Montana through Ohio of 1-3". Higher totals may be noted from Sioux Falls, across Iowa, and into the Quad Cities.