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

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

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

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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

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

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...