Which type of cloud is indicated by the acronym CB?

The acronym "CB" stands for Cumulonimbus Cloud, which is a type of cloud characterized by its towering structure and significant vertical development. These clouds are often associated with severe weather phenomena, including thunderstorms, heavy rain, lightning, and even tornadoes. The Cumulonimbus cloud forms due to strong convection currents and can reach high altitudes, creating an anvil-shaped top.

Understanding the properties of Cumulonimbus clouds is crucial for pilots and meteorologists because they indicate instability in the atmosphere and potential severe weather. The presence of these clouds typically signifies that there could be significant turbulence, poor visibility, and the likelihood of hazardous weather conditions, which are vital considerations for aviation safety.