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

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

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

Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...

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

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

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

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

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

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