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Amazing ‘Wave Clouds’ Seen Over Birmingham, Alabama (VIDEO)

Wave clouds

Last week Birmingham, Alabama was treated to an amazing display of clouds in the shape of waves, moving low on the horizon.

Although this is a spectacular event, apparently it’s not as rare as we might think. The formation is known as the Kelvin-Helmholtz instability. The phenomenon occurs when less-dense air (shearing winds) pull on denser air. It does of course happen in a similar way with fluid, when waves form in the ocean.

We can be thankful that on this occasion the event occurred in a heavily populated area, so some of the lucky people who witnessed it in person were able to video it for us to see via YouTube.

Via HuffPost

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