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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Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...
Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
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...
A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.