Cumulus clouds tend to indicate that the atmosphere is unstable at the altitude where they are found. Stratus clouds: these clouds are layered and often look flat.
[header] How to distinguish the different types of clouds [title] Identify clouds by shape. [step] The two shapes are cumulus and stratus : [substeps] Cumulus clouds: these are the big, " fluffy " clouds that look a bit like cotton balls. These clouds have a thickness that is usually equal to or greater than their width and they have very distinct edges.