After a weekend of heavy rain in Nebraska, Iowa, Wisconsin and Northern Illinois, much of that rain will run into streams that eventually dump into the Missouri or Mississippi River. Because of this, the Missouri and Mississippi Rivers will be on the rise into this upcoming weekend. In fact, below is the river level graph on the Mississippi River at St. Louis. You can see the sharp rise in the water level forecasted for this weekend. At St. Louis the Mississippi will be in the "Moderate Flooding" Level as the river crests 6.4' above flood stage this Saturday. At this level the flood wall at Prairie Street is closed.