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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A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...
Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...
A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.
A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...
A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...