Years ago,there used to be the most amazing cumulonimbus clouds in Florida during the summer.All the moisture would gather into 2 or 3 very distinct "super clouds .These clouds were flat on the underneath side.It looked as though someone had painted this underside black.They would move about the sky on very sunny clear days.If you were not looking up,one of these might move over your head.All of a sudden,the area you were in would get very dark.You would look up and pray these clouds wouldn't release their rain on you before they moved on. I' really miss those summers back in the 70s.These days cloud cover is broken up and scattered.I don't know what has changed.It was amazing and beautiful!