What is Lightning?
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or between a cloud and the ground.
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Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...
A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...