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.

Glossary

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...

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

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...

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

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

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

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

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

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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