Expect widespread fog as you get going Sunday to breakfast or church. The fog will dissipate some as the day goes on. High temperatures will only get into the 30s and 40s. A strong surface low pressure will be passing to our south, setting up a wide range of temperatures. Parts of north central Nebraska will be well into the 60s. Some mixed precipitation will develop on the northern part of the low, which is where we are. Aiding that will be an inversion as well. So expect a mix of freezing rain, sleet, and snow. Accumulations from all of this will be very light. There will be increased snow totals to the east though.
Northwest winds really increase Sunday night as that powerful low passes through eastern South Dakota. In fact, gusts of 50-60 mph will be common. Gusts around 70 mph will happen in some areas. Blizzard conditions are likely through the central part of South Dakota.
Much of this will continue for a good portion of Monday. By the time it's done, snow accumulations will be in the 0-3" range for western South Dakota. Depending on the track of the storm, amounts up towards a foot are possible around Pierre.
The snow ends late Monday and into Tuesday with the remainder of the forecast quiet, lending to an opportunity to clean up and catch up at work and school.