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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A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...
A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...
The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...
Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.
The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...
The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.