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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Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...
A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...
A very cold high pressure that originates over the Arctic Ocean.
A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...
The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...
A narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.
Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...
The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.