What is Heat Index?
A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the 'apparent temperature.'
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In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
The branch of science dealing with the laws of motion of air or other gases.
Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...
Snow that rises to 8 feet or higher.
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....
The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...
A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...