The Cloud Collectors Reference
  • Main Types
  • Species and Varieties
  • Accessory Clouds and Supplementary Features
  • Other Clouds
  • Optical Effects
  • Home Page
  • What is Cloud Collecting?
  • Advice on photographing the sky
  • Search for a cloud type
  • About Cloud Classification
  • Collecting Points
  • Buy the cloud collector handbook

Over Excelsior, Minnesota, US

An example of the supplementary feature: mamma*
*30
CLOUD COLLECTING POINTS

Full classification: Cumulonimbus incus mamma

Over Excelsior, Minnesota, US
© Lissa C. Blyth
Other examples of mamma:
Over Hamiota, Manitoba, Canada

Cumulonimbus incus mamma

Over Bodedern, Anglesey, Wales

Cirrus mamma

Website © Gavin Pretor-Pinney and The Cloud Appreciation Society, 2009.
If you think we have got a classification wrong, please tell us about it.