An atmospheric river event is forecast to rainfall, snow, and the potential for flooding to parts of California this week.

The definition: An atmospheric river (AR) is a long plume of moisture that stretches from the tropics or subtropics into higher latitudes, often thousands of miles long. These thin ribbons of humid ...

Forecasts indicate that an atmospheric river will bring heavy rain and snowfall to much of the Pacific Northwest starting ...

At atmospheric river continues to slam portions of California Tuesday, with multiple inches of rain expected until Wednesday ...

The storm brought heavy rain and high-elevation snowfall to Northern California over the weekend, and a similar one is ...

Only if it falls as snow. A 2016 study by NASA, NOAA, UCLA, and Scripps Institution of Oceanography found that atmospheric river events are 2.5 times more likely to produce "rain over snow" events ...

An atmospheric river is slamming portions of California, with multiple inches of rain expected to drench the area until the storm runs out of moisture Wednesday morning, forecasters say.