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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An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...
The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...
Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...