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

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

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

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

A cloud of irregular appearance, composed of irregular cloud fragments.

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

Snow that rises to 8 feet or higher.

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...