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 cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

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

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...

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

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

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

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...