Weird Cloud

[Koach]

I took this today as I was driving home. The community in the distance is where I live. That's a firehouse near the entrance to the community.  It really looked to me like the beginning of a tornado, but it eventually just went away. 

 

[Odd]

I'm not saying aliens did it, but ?

[Nan]

Looks like a shelf cloud - they form at the start of storms, sometimes strong thunderstorms