Dark blue cloudy sky

What is Clear?

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility. Clear sky. In meteorology, this term is also used when the cloud cover is less than 1/8 during the day or at the observation hour.

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Glossary

The branch of science dealing with the laws of motion of air or other gases.

Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

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

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

Weather intelligence is technology that provides predictive and actionable insights, allowing businesses to adapt to weather-related...

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...