[cmruloah]

Thanks for the responses. I told my youngest [adult] son about the phenomenon I saw. He said it sounded like how a fireworks explosion with smoke puffs around a center larger puff would look like in the daytime. And it did look that way, except it floated away intact and got smaller in perspective and disappeared as I watched it. It didn't dissipate in place or fall as a firework explosion would. I know I didn't hear any explosion. I will certainly borrow some binoculars and keep them handy this summer whilst out on the deck, and a a camera for sure.