This was taken at Winnevegas Casino in Sloan Iowa and the event in question is to the NNE of me. I can't find any documentation of anything other than a Severe thunderstorm warning that ended up canceling out as 'it weakened below severe limits.' There didn't appear to be any rotation but there was rapid movement,development, and dissipation. Of clouds that were close to the ground. They seem to be known as scud clouds but my high hopes still isn't sure if what I really have here. Any help would be appreciated and a learning experience.