Mesmerizing Cloud Time Lapse

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When I was in my teens, I would see these clouds, look at my cloud chart, and see nothing like them listed. I thought I was misinterpreting the chart. As it turns out, this type of cloud -- undulatus asperatus -- while occurring since the beginning of time, was not identified as a unique cloud type until 2009.

The Capital Weather Gang has a nice story on this and how the cloud needs to be added to the list of official cloud types.

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