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 mass of very cold, dry air that mostly originates over the Arctic Ocean.
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
Snow that rises to 8 feet or higher.
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
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The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....
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A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.