Dark blue cloudy sky

What is Weather System?

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can be comprised of low pressure, which is associated with inclement weather, and high pressure, which typically brings more stable, pleasant weather.

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Glossary

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

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

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

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

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

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

A cloud of irregular appearance, composed of irregular cloud fragments.

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

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...