[SolanaBogon]

Good day, everyone


SolanaBogon, what you are describing here are Cumulonimbus Clouds which produce storms such as thunderstorms and so forth. Yes, they do have a flat bottom by nature.

Cumulus clouds, however, can develop in a much wider variety of atmosheric conditions than the Cumulonimbus. In fact, Cumulus is actually a category of a clouds with more variation than some people are aware. They can develop at different altitudes than other types of clouds and with more variety. Cumulus clouds can also develop in many parts of the world in any season, though summer is most common. A cumulus cloud can be small, gentle, and round like a cotton ball. It can also have a flat bottom, though not always. Some of them are large, too, which shows the variations in this category of clouds.





Fireskull

Sorry, for the error, but where I live, cumulus are big clouds who progress in altitude, and not little cotton ball, but, as you said, there is some types of cumulus.