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 line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.
The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...
The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...
A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...
An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.
A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...
A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...