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Cumulonimbus, from the Latin cumulus (heap) and nimbus (rainstorm, storm cloud), is a dense towering vertical cloud associated with thunderstorms and atmospheric instability, forming from water vapor carried by powerful upward air currents. 1 cumulonimbus calvus: cloud with puffy top, similar to cumulus congestus which it develops from; under the correct conditions in can become a cumulonimbus capillatus. 2  cumulonimbus capillatus: cloud with cirrus-like, fibrous-edged top. 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. Cumulonimbus clouds are thunderstorm clouds. High winds can flatten the top of the cloud into an anvil-like shape. Cumulonimbus clouds are associated with heavy rain, snow, hail, lightning and even tornadoes. The anvil usually points in the direction the storm is moving.  Best Answer: Thunderstorm clouds are also known as cumulonimbus clouds. From a distance, you will immediately notice the sheer size of them. They can extend to up to 65,000 feet high and look just like mountains. Their tops can sometimes reach as high up as the next layer of the atmosphere (stratosphere).  Cumulonimbus can form alone, in clusters, or along cold front squall lines. These clouds are capable of producing lightning and other dangerous severe weather, such as tornadoes. Cumulonimbus progress from overdeveloped cumulus congestus clouds and may further develop as part of a supercell. 1 cumulonimbus calvus: cloud with puffy top, similar to cumulus congestus which it develops from; under the correct conditions in can become a cumulonimbus capillatus. 2  cumulonimbus capillatus: cloud with cirrus-like, fibrous-edged top. Cumulonimbus calvus clouds have some features like nearly all cumulonimbus clouds and some of them are mentioned below: 1  They are very large, dark and threatening. 2  They have a sort of mushroom like appearance, even at this stage. 3  The top is the significant part because it shows how mature the cloud actually is. Cumulonimbus calvus clouds are sort of like the juveniles of the storm cloud world. Cumulonimbus clouds are always large and looming. When a cumulonimbus cloud matures, its top changes shape. The top of this particular type of cloud is a fairly new forming storm cloud, and the top reflects it Cumulonimbus clouds belong to the Clouds with Vertical Growth group. They are generally known as thunderstorm clouds. A cumulonimbus cloud can grow up to 10km high. At this height, high winds will flatten the top of the cloud out into an anvil-like shape. Cumulonimbus clouds are associated with heavy rain, snow, hail, lightning, and tornadoes. Cumulonimbus Clouds (thunderclouds) Cumulonimbus is a type of cloud that is tall, dense, and usually dark. These clouds form thunderstorms, and can create severe weather con … ditions, such as heavy rain, damaging winds, hail, lightning, and tornadoes. During the spring and summer, cumulonimbus clouds are more likely to form in the afternoon, due to the heating of the Earth's surface. However, they can also form along a cold front when the warm buoyant air is forced upward by the heavier cold air mass that cuts under the warmer air like a wedge. Cumulus Clouds. Cumulus clouds are puffy clouds that sometimes look like pieces of floating cotton. The base of each cloud is often flat and may be only 1000 meters (3300 feet) above the ground. The top of the cloud has rounded towers. When the top of the cumulus resembles the head of a cauliflower, it is called cumulus congestus or towering cumulus. These clouds grow upward, and they can develop into a giant cumulonimbus, which is a thunderstorm cloud.
https://en.wikipedia.org/wiki/Cumulonimbus_cloud http://www.weatherwizkids.com/weather-clouds.htm https://answers.yahoo.com/question/index?qid=20080409214223AA40P2A https://en.wikipedia.org/wiki/Cumulonimbus_cloud http://namesofclouds.com/cumulonimbus-clouds/cumulonimbus-calvus.html http://www.windows2universe.org/earth/Atmosphere/clouds/cumulonimbus.html http://www.answers.com/Q/How_does_the_cumulonimbus_look_like http://eo.ucar.edu/webweather/cumulus.html
what does a cumulonimbus look like