Asperitas (formerly known as Undulatus asperatus) is a cloud formation first popularized and proposed as a type of cloud in 2009 by Gavin Pretor-Pinney of the Cloud Appreciation Society.

The newest cloud type, asperitas formations are rare and resemble rippling ocean waves in the sky. What is asperitas cloud? Asperitas (formerly referred to as Undulatus Asperitas) is a...

Asperitas is characterized by localized waves in the cloud base, either smooth or dappled with smaller features, sometimes descending into sharp points, as...

Why Asperitas Clouds - or Undulatus Asperatus - are so rare. Want to see the world through the eyes of a scientist?

Jul 20, 2011 · The cloud looks a little like the surface of the sea on a choppy day, which is why we proposed that it should be called asperatus from the Latin verb ‘aspero’, meaning to make …

Asperatus clouds are giant, compact formations that do not cause storms, but generate impressive visual effects. The Morning Glory in Australia is a meteorological phenomenon that …

Oct 9, 2025 · Asperitas clouds, formerly known as Undulatus Asperatus, are one of the most visually dramatic and recently recognised cloud formations. Their bases resemble a dark, …

Asperatus are more closely related to undulatus clouds. The appearance of threatening clouds is particularly common on the plains of the United States, often in the morning or noon, followed …

Recently, some scientists have said that “asperatus” clouds, pictured at the right, cannot be described by the recognized varieties, and that they should have their own name. The name …

Dec 19, 2023 · SEASIDE, Ore. (KOIN) — Undulatus Asperatus. What? Yes, that’s the name of this rare cloud formation seen over Seaside on Monday afternoon. This cloud is relatively new …