Dark blue cloudy sky

What is Lightning?

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or between a cloud and the ground.

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Glossary

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

A very cold high pressure that originates over the Arctic Ocean.

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

A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.