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 large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...
The amount of water vapor present in the air, which can affect comfort levels and weather conditions.
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...