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

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...

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

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

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

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

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

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

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...