What is an atmospheric river?

.FOR CALIFORNIANS it seemed like du00e9ju00e0 vu. In 2014 a procession of hurricanes, fed by atmospheric waterways, eliminated at the very least 21 individuals and triggered virtually $5bn-worth of damage all over the condition. On February 4th this year the same sort of tornado again wreaked havoc.

Hurricane-strength winds buffeted the central coast near Big Sur. In Los Angeles personalities were soaked as they got to the Grammy honors’ welcome mat. Mansions in the Hollywood Hills were actually dealt with in dirt.

A minimum of three people have passed away. What are atmospheric rivers, as well as are they a danger past The golden state?