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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The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.
Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...
The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...
Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
A large body of air having similar horizontal temperature and moisture characteristics.
An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...