A rare natural spectacle recently amazed people in Folsom, California. When the weather was stormy, bag-shaped clouds – so-called mammatus clouds, a weather phenomenon that has not been much studied until now – briefly graced the sky above the small town (see video above).
Footage taken on February 4 (see video above) shows the unusual clouds that resemble fluffy cotton balls or breasts. The name mammatus cloud also comes from the latter (the Latin word mammatus means something like breast-like, nut).
Formed by evaporation processes
This short-lived type of cloud is occasionally observed after thunderstorms and usually dissipates after only ten to fifteen minutes. There are several theories about how the bag-like formations at the bottom of clouds form. The most popular is that mammatus clouds are formed by evaporation processes at the bottom of clouds.
The unusual appearance that clouds can take is also evident from a photo that the author of these lines took on August 6, 2017 near the Italian community of Misano Adriatico, shortly before an approaching thunderstorm. It was shaped like a mushroom cloud (photo above) – on the 72nd anniversary of the atomic bomb dropped on the Japanese city of Hiroshima…
Source: Krone

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