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 percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.
A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...
A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...
A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.
A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.
Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...