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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Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...
Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...
A cloud of irregular appearance, composed of irregular cloud fragments.
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
A type of cloud consisting mostly of small particles such as ice particles.
A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...
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 cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...
An instrument for measuring atmospheric pressure.
Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.