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 line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

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

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

The amount of water vapor present in the air, which can affect comfort levels and weather conditions.

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

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

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

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

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

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.