It’s fair to say that clouds make some impressive patterns. The online cloud photo sharing community is huge, the genre goes by the all-too-obvious name of ‘Cloudporn’ (as if you didn’t know already).
Not unlike the other somethingorother of the p-word variety, every formation has a name. Much like the aforementioned, I’m only guessing if I have any idea what this is.
I’m going with a Nimbus cloud, but I’m happy to be corrected.