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 fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...
A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...
A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...
A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...