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

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

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

A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...

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

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

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...