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

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...

Snow that rises to 8 feet or higher.

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

A narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.

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

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...