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 state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

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 scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

A large body of air having similar horizontal temperature and moisture characteristics.

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

The amount of water vapor present in the air, which can affect comfort levels and weather conditions.

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...