Look At These Crazy Wave Clouds!


Look! In the sky! It’s a bird! It’s a plane! It’s a cloud that looks like neither a bird or a plane! A wave! It looks like a wave!

High above South Carolina yesterday “wave clouds” rippled through the sky. They are bonkers!

Look at this video:

Now look at this one:

Weather.com has a whole gallery of crazy shots.

What is a wave cloud? WIRED explains:

These crazy clouds that look like a row of crashing waves are known as Kelvin-Helmholz waves. They form when two layers of air or liquid of different densities move past each other at different speeds, creating shearing at the boundary.

“It could be like oil and vinegar,” Chuang said. “In the ocean, the top is warm and the bottom is really cold. It’s like a thin layer of oil on a big puddle of water.”

When these two layers move past each other, a Kelvin-Helmholz instability is formed that is sort of like a wave. Parts of the boundary move up and parts move down. Because one layer is moving faster than the other, the shear causes the tops of the waves to move horizontally, forming what looks like an ocean wave crashing on the beach.

“It really is like breaking waves,” Chuang said. “A wave breaks when the water on top moves so much faster than the water below that it kind of piles up on itself.”

The world is a weird and beautiful place.

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In "It's Not a Crisis. This Is the New Normal," we explain, as matter-of-factly as we can, what exactly our finances look like, how brutal it is to sustain quality journalism right now, what makes Mother Jones different than most of the news out there, and why support from readers is the only thing that keeps us going. Despite the challenges, we're optimistic we can increase the share of online readers who decide to donate—starting with hitting an ambitious $300,000 goal in just three weeks to make sure we can finish our fiscal year break-even in the coming months.

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