We went to Murdo, SD and checked data. We then went to Cactus Flat and met up with several other chasers. A cell started to fire to our SW. It was very slow in developing. We soon decided to go south through the Badlands National Park. We had a great view of the LP as it slowly moved NNE towards us. After a long time of filming this, it started to get a rain core with it and began to right turn. I decided we should move farther east to stay ahead of it. We had just exited the park when the tornado formed behind us. We stopped to film it, then continued east. Road options were not good, we went east a ways then south, The storm had great structure. At one point, some locals stopped by to see what was going on. One of them pulled out a gun and shot at the storm. We continued S then E then N then E (road options were not so good). After a while the gust front of a line behind our storm caught up with it and gusted it all out.
