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 cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

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

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

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

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

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

A narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.

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

A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.