Mammatus Clouds

Mammatus Clouds sagging pouch-like structures
Mammatus are pouch-like cloud structures and a rare example of clouds in sinking air.
Photograph by: Manikin ...

Mammatus Clouds - Rounded, smooth, sack-like protrusions hanging from the underside of a cloud (usually a thunderstorm anvil).

Mammatus Clouds - cloud features resembling pouches which hang from the underside of a cloud (usually a thunderstorm anvil) and are typically associated with intense cumulonimbus clouds ...

Mammatus Clouds - permalink - collapse
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Rounded, smooth, sack-like protrusions hanging from the underside of a cloud (usually a thunderstorm anvil).

Mammatus clouds Clouds that look like pouches hanging from the underside of a cloud.
Marine climate A climate dominated by the ocean, because of the moderating effect of water, sites having this climate are considered relatively mild.

Mammatus clouds Clouds that form on the underside of a thunderstorm anvil and exhibit pouchlike, downward protuberances; may indicate turbulent air.

Mammatus clouds are bulbous or pillow-like features underneath the anvil.
Precipitation area ...

MAMMATOCUMULUS (Mammatus Clouds)
An obsolete term for cumulonimbus mammatus, it is a portion of a cumulonimbus cloud that appears as a pouch or udder on the under surface of the cloud.

They usually appear on the upwind side of a back-sheared anvil, and indicate rapid expansion of the anvil due to the presence of a very strong updraft. They are not mammatus clouds. See also cumuliform anvil, anvil rollover.

KNUCKLES - The upwind side of a thunderstorm anvil top with mamma-like protrusions along the edge that resemble the knuckles on a hand. These are not mammatus clouds.

on the edges, and sometimes the underside, of a thunderstorm anvil. They usually appear on the upwind side of a back-sheared anvil, and indicate rapid expansion of the anvil due to the presence of a very strong updraft. They are not mammatus clouds.

They are not mammatus clouds. See also cumuliform anvil and anvil rollover.

See also: Cloud, Storm, Thunder, Thunderstorm, Mammatus Cloud