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📘 How an atmospheric river carries rain

Follow ocean moisture through jet streams, mountain lift, rain, snow, and flood forecasting.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

Moisture plume
Ocean source
Jet stream
Landfall
Rain and snow
Duration
Water budget
Forecasting
Snowpack
A connected cycle

Questions this course answers

What does an atmospheric river transport?

It is a corridor of strong horizontal moisture transport.

What forces moisture to precipitate at a mountain?

Rising air cools and condenses water vapor.

Why can one event produce rain and snow?

The freezing level varies across the storm and terrain.

What controls flood risk from an atmospheric river?

Local storage and timing determine how precipitation becomes runoff.

How are atmospheric rivers monitored?

Multiple observing systems estimate moisture, winds, precipitation, and impacts.

Grounded in trusted sources

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