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 formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

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

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...

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

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...

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

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

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.