Amy Christie Hunter snapped the photo of the rare wave-shaped clouds as they appeared to roll over the mountains at Smith Mountain Lake in Virginia.
The clouds, which are called Kelvin-Helmholtz clouds, are named after Lord Kelvin and Hermann von Helmholtz, who studied the physics that leads to these formations.
When these type of clouds do appear they generally form on windy days, when different layers of air in the atmosphere move at different speeds, according to EarthSky.
Have you ever seen these rare wave-shaped clouds?
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