cumulus clouds
cumulus clouds are white puffy clouds that look like pieces of floating cotton. cumulus clouds are often called fair-weather clouds the base of each cloud is flat and the top of each cloud has rounded towers. when the top of the cumulus clouds resemble 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 are thunderstorm clouds.