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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Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...
The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....
A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...
A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.