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 thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
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 sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...
Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
Meteorology is the scientific study of the atmosphere and weather processes. It involves observing, analyzing, and forecasting...