One of my students was late, and so I looked outside to see if I could see him coming. I noticed that, off to the east, there was a huge wall of white fluffy clouds. As I watched, I could actually see them bubbling up and getting larger and fluffier. It was like watching a time-lapse, but in realtime. It was quite remarkable.

Sorry for potato, but I had to max-zoom to make it even appear.