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

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A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

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A very cold high pressure that originates over the Arctic Ocean.

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

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