Wave-Like Cloud Formation Spotted at Australia

• An Australian man recently captured the elusive undulatus asperatus cloud. It’s as rare to spot as it is tough to pronounce. Undulatus asperatus wasn’t even classified as a cloud formation until 2017.

How are they formed?

• Two main theories exist on what leads to their formation. They may be a distant cousin of nature’s most comical cloud formation, the mammatus cloud. Some believe these pouch-like mammatus clouds, which often occur on the underside of intense thunderstorm anvils, descend to a height where turbulent winds sculpt them into crisp, elegant waves.
• The other, more likely cause, is from gravity waves. It’s possible ....