Map of Sierra Nevada in California showing how an atmospheric river develops. Most atmospheric rivers are weak and do not cause damage. In fact, they can provide much-needed rain or snow.

An atmospheric river that has brought multiple rounds of heavy rainfall and strong winds across the U.S. is shifting later ...

When a bomb cyclone meets an atmospheric river, the result is like an out-of-control fire hose A powerful storm hitting the West Coast combines these weather phenomena for a wet week in many areas.

This is notable as the heaviest rain will fall on the same areas soaked with up to 23 inches of rain during the Category 5 atmospheric river back in November 2023, the FOX Forecast Center noted.

Here's an explanation of how they form, their size and potential impacts. WHAT IS AN ATMOSPHERIC RIVER? The weather system occurs all over the world. It starts when a large amount of water vapor ...