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

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

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

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

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

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

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

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