Dark blue cloudy sky

What is Atmospheric River?

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

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Glossary

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

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

Snow that rises to 8 feet or higher.

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

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

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

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...