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

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

An instrument for measuring atmospheric pressure.

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

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

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

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