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

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

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

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

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

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.

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