Mammatus (also called mamma[1] or mammatocumulus, meaning "mammary cloud") is a cellular pattern of pouches hanging underneath the base of a cloud, typically a cumulonimbus …

Jul 31, 2025 · In fact, most clouds are formed by rising air. But mammatus clouds, however, are interesting in part because they’re formed by sinking air. They appear ominous. And indeed, …

Nov 30, 2023 · A mammatus cloud forms under very tumultuous weather conditions. They often form on the underside of storm clouds, and although scientists aren't entirely sure why they …

What are Mammatus clouds, what causes them and how are they formed? We explore these rare cloud shapes and everything you need to know.

Mammatus clouds are some of the most unusual and distinctive clouds formations with a series of bulges or pouches emerging from the base of a cloud. The shape of mammatus formations …

Apr 30, 2024 · Mammatus clouds are large lumpy formations on the underside of clouds that look like large cow udders and come in advance of stormy weather.

Aug 29, 2024 · Mammatus clouds are probably the most unusual and distinctive cloud formations. They form on the underside of a thunderstorm’s anvil. Their name comes from the Latin word …

Mar 24, 2024 · Another possible thing you can see beneath a cumulonimbus cloud is called mammatus. This is an indication of very active updrafts and downdrafts and can be a sign of …

Sep 2, 2025 · Mammatus clouds are characterized by a cellular pattern of pouch-like structures that hang from the underside of a cloud, resembling udders or breasts. The name “mammatus” …

Mar 3, 2025 · Mammatus clouds are pouch-like protrusions (or sacs) that form below the base of a cloud formation, predominantly cumulonimbus clouds. They are the result of cold sinking air …