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 line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...
A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...
A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...
Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...
The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...
Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...