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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Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...
The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...
A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...
The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...
A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...
Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...