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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Snow that rises to 8 feet or higher.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...
The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...
A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...
A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...