UFO like cloud caught in Sedona, Arizona

On October 21, 2015, a witness photographed a strange UFO looking like a perfect small cloud, in the area of Sedona, Arizona. What is it?

Witness report:

My guardian angel told me to take pictures of this one area. Told me to take 3 pictures . I looked at the object and it look like a cloud the small cloud perfect. Took 3 pictures but it only came out in one picture the one I'm going to send you.