Dark blue cloudy sky

What is Humidity?

The amount of water vapor present in the air, which can affect comfort levels and weather conditions.

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Glossary

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

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

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