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 weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

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

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

A narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

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

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

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

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