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

An instrument for measuring atmospheric pressure.

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

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

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...

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

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

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

Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...