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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Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....
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...
The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.
Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...
A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.