Dark blue cloudy sky

What is Cold Front?

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden drops in temperature, thunderstorms, and heavy rain as the colder air forces the warmer air upward.

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Glossary

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

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

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

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

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

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

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

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