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 long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

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

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

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

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.