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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In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...
A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.
The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...
Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...
Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...