Clouds will slowly increase this evening and tonight with scattered light snow developing in western and southwestern South Dakota. This snow will move east into south central and parts of central South Dakota tonight and into Tuesday morning. Much of eastern and the northern half of South Dakota will stay dry tonight. Temperatures will fall to the twenties with light winds.
The moisture will move into southeast KELOLAND (mainly south of Highway 14), Tuesday afternoon.
There will be a brief period of rain, then rain mixed with snow, then all snow by the afternoon (after 3:00 or 4:00). Again, much of the northern half of KELOLAND will be dry. Highs will in the the thirties. Winds shouldn't be much of a problem with speeds of ten to fifteen miles per hour from the northeast.
Snow amounts will mainly be found south of Highway 14 with one to three inches being common. There have been indications of heavier amounts in northwest Iowa and southwest Minnesota where three to four inches will be common. There will also be isolated six inch amounts in these areas.
It's a fast moving system, so I expect a lot (if not all) of it to be out of KELOLAND by Wednesday morning. Skies will eventually become partly cloudy on Wednesday with highs only in the thirties. The temperatures will slowly warm as we go through the remainder of the week with dry skies.