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

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

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

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

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

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

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

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

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

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.