Mysterious Atmospheric River Soaks California, Where Megaflood May Be Overdue

[caption id="attachment_10063" align="alignleft" width="300" caption="An atmospheric river (thin yellow band) feeds torrential rain into northern California on Nov. 30. Image courtesy of NOAA"] [/caption]Northern California is experiencing the first days of what weather forecasters are warning will be a long series of torrential rainstorms that could cause serious flooding across the northern one-third of the state. The relentless storms are being driven by a feature in the atmosphere you have probably never heard of: an atmospheric river. [More]