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

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...

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

A very cold high pressure that originates over the Arctic Ocean.

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

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

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....