Undulatus Asperatus Clouds
Wow! They really do undulate. This is the first I’ve heard about this type of cloud. Excerpt from the article and link to the full article is below the short video.
Excerpt from the article …… “Regardless of official cloud status or not, undulatus asperatus sitings are strikingly visual reminders that the atmosphere is an ocean of gas, complete with cloud waves crashing high above. They occur when enough atmospheric instability, or rising air, is available to create widespread cloud cover, as well as wind shear and turbulence, which creates the wavy, rough sea-like visual effect.”