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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The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.
Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...
Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...