National Weather Service United States Department of Commerce

Rain will spread eastward across central SD today to portions of east central SD by this evening and continuing overnight. There is a 70-90% chance of rainfall of a half inch or more along and south of a line from Eagle Butte to Chamberlain. Last of the rain will move out of south central SD early Monday morning.
Highest chances of 60-95% will be across central SD with a decrease in rain chances further east and northeast over the region.