It is a well known fact that UFOs are using clouds to hide themselves in their entirety or partially and sometimes they create a cloud around them.
The next image taken on June 10, 2016 shows a cloud formation over Gonzales, Texas.
If you look at the lower black cloud, a very unusual shape can be seen sticking out of the cloud. See image above.
While some clouds have very weird shapes which look like UFOs, in this case it seems as an unknown craft (with rectangular windows) has hide itself partially in the dark cloud. Mufon case 76940.