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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Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...
Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.
A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...
An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....
A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
A very cold high pressure that originates over the Arctic Ocean.
A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
The amount of water vapor present in the air, which can affect comfort levels and weather conditions.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...