Newsweek - An atmospheric river is bringing a surge of moisture across California, with excessive rains causing Lake Oroville to rise more than 6 feet in the span of a day.
Atmospheric rivers are a "long, narrow region in the atmosphere—like rivers in the sky—that transport most of the water vapor outside of the tropics," according to the National Oceanic and Atmospheric Administration.
The storms brought by atmospheric rivers are known for their heavy snow, heavy rain and strong winds. They more commonly affect the West Coast, particularly during the winter months. Although the storms can bring beneficial snow that helps supplement reservoirs throughout the dry summer season, they can also trigger deadly flooding, mudslides and widespread power outages.
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