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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An instrument for measuring atmospheric pressure.
A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...
The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.
The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...