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 weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...
A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.
The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...
The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.
The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...
The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...
A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.