Definition

Lobes or pouches of cloud which hang down from the base of a cloud. The name comes from the latin mamma which means breast.

Description

Mammatus clouds are normally associated with severe Cumulonimbus (Cb) clouds and are indicative of Wind Shear.

Related Articles

• Cumulonimbus (Cb)
• Cloud Types
• Low Level Wind Shear
• Asperitas
• ATC Operations in Weather Avoidance Scenarios

Further Reading

• UK MET Office Factsheet No.2 - "Thunderstorms"