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 condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...
The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...
The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.
A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.
A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...