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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Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...
A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...
A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....
A type of cloud consisting mostly of small particles such as ice particles.
A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...
The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...