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 decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...
Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...
A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...
A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...
A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
A narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.