The International Cloud Atlas | World Meteorological Organization
The World Meteorological Organization is advancing with a major project to revise and update the International Cloud Atlas. The aim is to produce a user-friendly, digital-based product which is an authoritative, comprehensive and up-to-date source of reference and is also interesting and accessible to a wide audience.
This is really a great site for Teachers on Clouds. It’s a great resource for teaching cloud classification. Use this and the new Globe Observer Cloud App for a lesson on cloud classification.