Remember those clouds that look like flying saucers? So they're called lenticular clouds and this time-lapse shows how they form over the Popocatepetl volcano in Mexico, these clouds always appear in relation to big mountains.

https://nostr.build/av/f69f86f325a235324c170674d1b12ce46a5494f1098be4339cc958aee4f41174.mp4