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

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

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

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...

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

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

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

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...