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 line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

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

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

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

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

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

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.