Cumulus clouds are a type of cloud that is fluffy, white, and usually has a flat base. They are often described as looking like cotton wool or cauliflower. These clouds form at low to middle altitudes and are associated with fair weather. They are formed by the convection process, where warm air rises and cools, causing water vapor to condense into visible cloud droplets.
Cumulus clouds form when warm, moist air near the Earth's surface rises and cools as it encounters cooler air at higher altitudes. As the air cools, the water vapor it contains condenses into tiny water droplets, which cluster together to form a cloud. The rising air currents give the cloud its characteristic puffy appearance, and the flat base is formed where the cloud meets the cooler air at its level of condensation.
Cumulus clouds are typically white or light gray in color and have a fluffy, cotton-like appearance. They are often associated with fair weather, but can also develop into larger and darker clouds, such as cumulonimbus clouds, which are associated with thunderstorms. Cumulus clouds are often seen on sunny days, and their presence can indicate that the weather is stable and pleasant.