These ominous clouds are a new Cloud Type (2009) since over 50 years.
I’ve actually seen clouds doing this IRL, and it didn’t require time lapse to be noticeable at all. Giant blanket of mammatus clouds undulating wildly like when you’re underwater and you look up.
I was a little kid, in Texas, so it scared the crap out of me, but the storm it accompanied turn out to be innocuous.
Oh hey, someone else traumatized by being a little kid in Texas. Everytime I see weird clouds Piet has to put up with me asking “Are you sure there aren’t tornadoes here?” fifty times in a row.
OR A GREEN SKY.
UGH yes, I hate those.