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Related: About this forumEarth, Air, Fire and Water in the Morning Sun

Cumulus congestus clouds form when invisible updrafts of heated air cool as they rise and form towers of puffy cloud. Usually, the updrafts are created by the Sun heating the land. But on rarer occasions, the heating comes from something else, like flames from a forest fire or the lava of a volcano. Cumulus congestus clouds formed by a localised heat source like this are given the moniker flammagenitus.
Dan Chaney (Member 63,013) rose early enough on the island of Hawaii, US to catch an eruption of Kīlauea volcano producing such a cloud at sunrise. Its fountain of lava was lifting moist air way above and mixing fine ash particles into it. The result, directly over the volcano, was a towering Cumulus congestus flammagenitus cloud aglow in the golden morning sun.
https://cloudappreciationsociety.org/wednesday-21st-may-2025/
Dan Chaney (Member 63,013) rose early enough on the island of Hawaii, US to catch an eruption of Kīlauea volcano producing such a cloud at sunrise. Its fountain of lava was lifting moist air way above and mixing fine ash particles into it. The result, directly over the volcano, was a towering Cumulus congestus flammagenitus cloud aglow in the golden morning sun.
https://cloudappreciationsociety.org/wednesday-21st-may-2025/
Today's Cloud of the Day from the Cloud Appreciation Society

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Earth, Air, Fire and Water in the Morning Sun (Original Post)
SorellaLaBefana
May 21
OP
3catwoman3
(26,749 posts)1. Spectacular!
DUU
(15 posts)2. Almost looks like a painting
Pretty cool. Thanks for sharing.
Diamond_Dog
(37,163 posts)3. Wow!
Delmette2.0
(4,366 posts)4. Wow the Cloud Appreciation Society has
a great website.
Thanks for sharing.
AllaN01Bear
(25,346 posts)5. this.
