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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Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
Meteorology is the scientific study of the atmosphere and weather processes. It involves observing, analyzing, and forecasting...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...
The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...
Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...