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March 27, 2017

A new category of cloud called the “undulatus asperatus.”

Earth’s newest cloud is terrifying - - Yesterday, on World Meteorological Day — nine years after the classification was first submitted — the World Meteorological Organization finally recognized Pretor-Pinney’s clouds in the updated version of the International Cloud Atlas, though the name has been tweaked to “asperitas.” They’re the first new addition to the Atlas in over half a century.

Posted by gerardvanderleun at March 27, 2017 9:36 AM. This is an entry on the sideblog of American Digest: Check it out.

Your Say

Well. That's just going to mess with the Federal Meteorological Handbook, let me tell you. There is just no provision for this sort of cloud in chapter 9.4.6, or in chapter 12.7.1(s) (significant cloud types). I mean, with altocumulus castellanus and cumulonimbus mammatus, there is at least a history, a tradition, if you will.

Posted by: Gordon at March 27, 2017 12:49 PM

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