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,...

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

A large body of air having similar horizontal temperature and moisture characteristics.

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

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

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...