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 weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...
The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...
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Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...
A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...
Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.