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 bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

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

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

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

Weather intelligence is technology that provides predictive and actionable insights, allowing businesses to adapt to weather-related...

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

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....