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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In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...
A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
The amount of water vapor present in the air, which can affect comfort levels and weather conditions.
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...
A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.
The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.