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 tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....
A type of cloud consisting mostly of small particles such as ice particles.
Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...
A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.
The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...