The northern part of S.Dak east of the river was wet last fall,areas got snow,and now are getting rain lots of rain. I am more centrally located and we were very dry since last summer. Not much snow,at least for snow melt. We have gotten some rain in the last couple weeks.
The amount of moisture up in that north east corner is what has caused the high water levels in area lakes around here for the last 10/15 years . Some of that moisture drains east to Minnesota. The middle of the Dakotas as well as The area where the Missouri River starts in Montana have been dry for years and still need some rain.
Near me the Sioux River was only out of its banks for 48 hours last year and is only nearly full today. 4 and 5 years ago it was flooded in the spring for months.