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

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

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

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

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

The narrow region between 35-40 ° N and S latitudes in the Northern and Southern Hemispheres, lying between the tropical...

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

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

An instrument for measuring atmospheric pressure.

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...