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

An instrument for measuring atmospheric pressure.

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

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

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...

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

A large body of air having similar horizontal temperature and moisture characteristics.