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

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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

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

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

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

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