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 expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

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

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

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

An instrument for measuring atmospheric pressure.

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

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...

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

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...