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 closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...
A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.
Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...
A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.
The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...