Dark blue cloudy sky

What is Trough?

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms and rain.

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Glossary

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...

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

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

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

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

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...