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 closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
A cloud of irregular appearance, composed of irregular cloud fragments.
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...
Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...
A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...
The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.