LAKEWOOD, Ohio -- You’re used to waves on Lake Erie. But what about waves in the sky?

Sarah McClendon took a photo of wave clouds from her Gold Coast condo Saturday, a rare phenomenon called Kelvin-Helmholtz clouds that lasted about 10 minutes.

The clouds are named after scientists Lord Kelvin and Hermann von Helmholtz, and indicate instability in the atmosphere, according to weather.com.

The swells of the clouds are evenly spaced and can show that two layers of air in the atmosphere are moving at different speeds, scooping the top cloud layer into a rolling structure.

Take a look!

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