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 drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

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

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

Indicates the amount of water the soil can absorb/retain through percolation. This capacity is around 7% in sandy soil and...

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.