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 measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

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 rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

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

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

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

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

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 long, narrow region in the atmosphere that transport water vapor, like a river in the sky.