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

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A cloud of irregular appearance, composed of irregular cloud fragments.

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.