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

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

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

A type of cloud consisting mostly of small particles such as ice particles.

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

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

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

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

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...