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

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

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

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

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

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...

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

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...