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

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

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

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

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...

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

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

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...

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

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