Cumulus clouds are the puffy clouds that look like puffs of cotton. Cumulus clouds that do not get very tall are indicators of fair weather. If they do grow tall, they can turn into thunderstorms. The bottom of cumulus clouds are fairly close to the ground. A large white puffy cloud that develops through convection. On a hot, humid day, they can form towers and even become cumulonimbus clouds. The Trascau Mountains are located in the Apuseni mountain range of the Western Romanian Carpathians.

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