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 weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

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

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

A type of cloud consisting mostly of small particles such as ice particles.

A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

A cloud of irregular appearance, composed of irregular cloud fragments.

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.