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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Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
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.
The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...
A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...
A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.