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

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A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

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

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

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

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

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

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