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 cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...
A large body of air having similar horizontal temperature and moisture characteristics.
An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...