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 closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

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

Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...

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

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...