Atmospheric Rivers Threaten Once-in-a-Millennium Flooding click button

Atmospheric Rivers Threaten Once-in-a-Millennium Flooding

In 2020, many Californians prayed for rain as wildfires in the region destroyed millions of acres of land. But they got more than they bargained for when what weather forecasters described as an “atmospheric river” set a course for the state, causing storms that triggered catastrophic mudslides and washed out a section of Highway 1. 

Why This Matters: Atmospheric rivers can carry as much water through the atmosphere as land rivers, and at similar speeds. Between 1978 and 2017, just 10 atmospheric rivers caused over half of all flood damage in the Western U.S.   

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