The map below shows the rotation tracks for this evening, so far. Tornadoes are usually associated with the stronger rotation (blue, white). Below are zoomed images into the area west of and around St. Louis. They are the same data but I've made the map underlay more visible in the second image. Click to enlarge the lower image and the map becomes readable. 

These are radar-derived low-level rotation maps as of 7pm.  Eastern Nebraska, including the Lincoln-West Omaha + Omaha/Eppley Field Storm. Likely long-track tornado from SE Kansas crossing into western Missouri. Below are individual storm reports: