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 weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

Meteorology is the scientific study of the atmosphere and weather processes. It involves observing, analyzing, and forecasting...

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

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

A narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.

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

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...