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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A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...
The branch of science dealing with the laws of motion of air or other gases.
The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
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 very cold high pressure that originates over the Arctic Ocean.
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...