
June is the month of thunderstorms, and it's a common sight to see a cloud like this grow from a wisp into this massive structure in 15 minutes! This particular cloud kept growing, but it was in a storm that was moving quickly over the ground, so it blew away from me before it got to be full sized.
A group of photobloggers post a photo of their skies each Friday - it's called
Skywatch Friday. Click the link to see photos from round the world.