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.
Glossary
An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...
The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...
A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...
Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...
A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
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