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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The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.
The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...
Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...
The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.
A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...