Atmospheric rivers are long and relatively narrow bands of water vapor that form over an ocean and flow through the sky, ...

What is a Pineapple Express? It's a type of atmospheric river that forms a long, narrow tract in the Earth’s atmosphere. This jet stream gathers moisture from the tropics near the equator and ...

SAN FRANCISCO – A series of three atmospheric river storms are soaking Northern California this weekend and into the week ahead in the form of valley rain and mountain snow, with the potential ...

Call it an atmospheric river, a Pineapple Express or just weather, but some parts of California and the U.S. Northwest are being slammed by up to foot of rain before the storm runs out of moisture ...