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 closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

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

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

A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

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

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

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

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...