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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The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...
Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...
A type of cloud consisting mostly of small particles such as ice particles.
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...