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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An instrument for measuring atmospheric pressure.
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....
Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...
A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...
A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...
A large body of air having similar horizontal temperature and moisture characteristics.
A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.