Mammatus clouds are pouch-like protrusions hanging from the undersides of clouds, usually thunderstorm anvil clouds, but other types of clouds as well.
Composed primarily of ice, these cloud pouches are visible in the sky for only about 10 to 15 minutes.
Aside from their magnificent beauty, mammatus clouds are interesting in part because they are formed by sinking air; whereas most clouds are formed by rising air.
You can use Google to search for beautiful images of mammatus clouds. But I had the good fortune to witness one while going to a hiking trip in Glenbrook Gorge in Blue Mountains, NSW, Australia.
It was my first time to see such clouds !
I was driving at the time. I saw the clouds but didn’t have a chance to stop the car.
But 老炊 had the opportunity to snap this picture over Glenbrook Railway Station.
2020-05-31, shortly after 7am
Photographer: 老炊
More photographs on my Glenbrook Gorge hiking trip are in this link:
https://drive.google.com/file/d/1l5hw2Ep4QbmcH1OHb31He1fCfSQdIId5/view?usp=sharing
