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

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

Weather is the day-to-day meteorological conditions that happen in our atmosphere. Weather can change within minutes, which...

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

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...

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

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