Dark blue cloudy sky

What is Relative Humidity?

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

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Glossary

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

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

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

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

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

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