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 scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
A large body of air having similar horizontal temperature and moisture characteristics.
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...
The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.
A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.
A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...