Dark blue cloudy sky

What is Alto?

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus and altocumulus. These clouds are often associated with changing weather patterns.

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Glossary

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

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

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 cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

Meteorology is the scientific study of the atmosphere and weather processes. It involves observing, analyzing, and forecasting...

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

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