It's time for you to look up at the sky more often.
If you did, you might catch a volutus, or roll cloud, which looks like a tube that appears to be spinning along its horizontal axis. Or perhaps you'll get really lucky, and see a dramatic-looking asperitas cloud, from the Latin word for roughness. These resemble a rough sea's surface, as seen from underwater.
The volutus and asperitas are but two of the 11 new cloud classifications included in the new edition of the International Cloud Atlas that the World Meteorological Organization (WMO) will publish online on Thursday.
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via Zero Tech Blog