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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The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...
A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
An instrument for measuring atmospheric pressure.
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...
A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...
Snow that rises to 8 feet or higher.