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

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

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

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

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

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

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

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...