Cumulus clouds look like balls of floating cotton. They are fair weather clouds but sometimes can turn into cumulonimbus clouds which mean bad weather. The bottom of the cumulus clouds are flat and the top is rounded. If the top of a cumulus cloud looks like a cauliflower then it is called a cumulus congestus or a towering cumulus. These clouds grow upward too. They are usually lower than 6600 feet above the ground unless the take the form of cumulus congentus clouds. What do you think about this cloud ?