UFO clouds
Don’t worry, you’re not about to be beamed up by little green men, these are lenticular clouds. Formed when moist air flows over a range of mountains, the fluffy bodies tend to appear and disappear very quickly, which is perhaps why sometimes it gets confused for an unidentified flying object.
These wonders are often seen above California and let’s face it, they are very convincing. It would be interesting to work out how many UFO sightings were actually people looking up into the sky and seeing these clouds floating above them.