The storm containing the tornado is the one at left. The bright white area peaking out the top is an “overshooting top” which, in a case like this, is often associated with very large hail.
The above photo was taken at 3:39pm CDT.
The satellite image below was taken at 3:32pm. I have circled the overshooting top, the towering cumulus cloud in the foreground that is merging with the main storm and the direction I am looking (arrow).
I will be offline the rest of the afternoon and evening. Please stay up on the weather if you are in one of the tornado watches (see below).