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

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

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

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

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

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

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...