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

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

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

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A cloud of irregular appearance, composed of irregular cloud fragments.

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

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

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

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...