Special Weather Statement issued February 15 at 9:45PM CST by NWS Chicago IL

A band of lake effect snow will develop along the Wisconsin shore
of Lake Michigan this evening, then swing southward across the
northeastern Illinois and far northwestern Indiana shores after
midnight. This band of snow looks to remain progressive, which
should limit its duration at any given location across the far
northeastern Illinois shore. Nevertheless, some light
accumulations and slick travel may result near the lake into
early Sunday morning. The lake effect band is expected to become
focused across northwestern Indiana Sunday morning, before
shifting east of the area Sunday afternoon.