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

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...

An instrument for measuring atmospheric pressure.

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...

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