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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Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...
A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...
A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...
The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...
An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...