Unusual Cloud for such a nice day

we had a great day here. sunny, warm, a light breeze. We went to watch the sailing races. but the most unusual thing I saw today were the clouds. They looked so light and wispy I expected them to be short-lived... but they hung in there for hours.

and so, here's an unusual cloud. the sky was full of them. the other pictures/images I took today will be able to be done again, but these clouds... probably not.