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

Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...

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

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

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

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

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...