Cumulus clouds are white, puffy clouds that look like pieces of floating cotton and are often called "fair-weather clouds".

The base of each cloud it flat and the top has rounded towers.

When the top of the cumulus clouds looks like the head of a cauliflower, it is called cumulus congestus or towering cumulus.

These clouds grow upward and they can develop into giant cumulonimbus clouds, which produce thunderstorms.

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