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 measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

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

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

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

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

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

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

A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...