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 line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
Snow that rises to 8 feet or higher.
A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...
A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...
The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...
A very cold high pressure that originates over the Arctic Ocean.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...
A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...