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What is Acid Rain?

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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Glossary

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...