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 cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...
A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...
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 weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...
A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....