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

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

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

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

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...

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

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

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...

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...