Resources

Resources

Learn how to identify cloud types by using this flow chart from the International Cloud Atlas. Clouds are divided into 10 fundamental types known as genera, depending on their general form. The genera are then further subdivided based on a cloud’s particular shape, structure and transparency; the arrangement of its elements; the presence of any accessory or dependent clouds; and how it was formed.

Posters

 
Download the WMO leaflet on Understanding Clouds

Download the WMO Understanding Clouds Poster in six languages:

English | French | Spanish | Arabic | Chinese | Russian

 

 

 

Cloud Classification Guide


Download the WMO Cloud Identification Guide:

English | French | Spanish | Arabic | Chinese | Russian










 

 

Low-Level Cloud Classification Aid