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 polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
A cloud of irregular appearance, composed of irregular cloud fragments.
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...
A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...
A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...
A type of cloud consisting mostly of small particles such as ice particles.
Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...
An instrument for measuring atmospheric pressure.