A band of snow is expected to develop after midnight near the Missouri River in South Dakota and move northeast overnight. As the band of snow moves through, snowfall rates of 1/2 to 1 inch will be possible. By sunrise on Monday, the snow is expected to extend from near Huron, South Dakota to Spencer, Iowa. This will likely have an impact on the morning commute in those areas. This band of snow will continue to move northeast through the morning extending from Brookings, South Dakota to Jackson, Minnesota by early Monday afternoon. Most of the snow is expected to be into the Minnesota River Valley by Monday evening. After the heavier snow moves through, there may be light freezing drizzle or very light snow through the afternoon in much of southeast South Dakota into northwest Iowa. While any ice accumulation is expected to be minimal, it may cause a glaze on untreated surfaces.
The heaviest snowfall is expected along and north of Highway 14 in South dakota then over much of southwest Minnesota. Snowfall in these areas will range from 3 to 6 inches and a winter weather advisory is in effect. Over the remainder of southeast South Dakota and northwest Iowa, up to 3 inches of snow is expected.