Dark blue cloudy sky

What is Cumulonimbus?

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe weather like hail or tornadoes.

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Glossary

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.