About the Image(s)

Mammatus clouds are pouch-like protrusions hanging from the undersides of clouds. You’ll usually find them under thunderstorm anvil clouds. But you might see them under other types of clouds as well. They’re composed primarily of ices, and groups of them can extend hundreds of miles in any direction. But they’re fleeting, remaining visible in your local sky for perhaps 10 or 15 minutes at a time.
People associate these cloud pouches with severe weather. And it’s true; they typically appear around, before or after a storm. In fact, most clouds are formed by rising air. But mammatus clouds are interesting in part because they’re formed by sinking air.
I was on my way to Oshkosh, WI for the airshow and came across this unique sky. Of course I had to stop and take a photo. I decided to make this a B/W but I like both renditions.