PORTLAND, Ore. (KOIN) — The highly anticipated atmospheric river arrives in Portland on Saturday afternoon and continues through the start of next week. A relatively dry start to Saturday will ...

A soggy weather phenomenon known as an "atmospheric river" will be responsible for the warm and continuous rainfall. This long, narrow plume of moisture stretches all the way back into the sub ...

An expert at the Scripps Institution of Oceanography explains the weather phenomenon that can wreak havoc across California.

Meteorologist Cliff Mass says the Seattle area will be hit with a “significant atmospheric river event,” bringing especially heavy precipitation to the mountains and South Sound areas through ...

SPOKANE, Wash. — The final weekend in February is going to feel like a massive spring-like warm-up. However, it comes at a price as heavy rain, some wind, and a big-time snowmelt will fuel a ...

What's an Atmospheric River? A Pineapple Express? AP Explains the Weather Phenomenon Atmospheric rivers are a plume of moisture that extend across the Pacific to near Hawaii. When they hit land ...