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 of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
An instrument for measuring atmospheric pressure.
A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...
Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...