Atmospheric River California October 2025 Map

Atmospheric River California October 2025 Map. Atmospheric rivers are responsible for roughly half the annual rainfall. The graphics below are designed to forecast the presence and strength of atmospheric rivers using data from the ncep global forecast system (gfs), north american mesoscale forecast system (nam), and global ensemble.

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,. Half of california’s water supply and nearly all of its heavy precipitation events and floods come from a type of storm called an atmospheric river.