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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The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...
A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.
Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...
The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...