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 weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

A type of cloud consisting mostly of small particles such as ice particles.

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

An instrument for measuring atmospheric pressure.

Snow that rises to 8 feet or higher.

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

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

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

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