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.
The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...
A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...
A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.
A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...