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 or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...
A narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.