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 small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
A type of cloud consisting mostly of small particles such as ice particles.
The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...
A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...
Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...