Atmospheric River California News 2025 Season. Atmospheric rivers will tend to impact central and southern california during january, the accuweather forecast said, before returning to the northern part of california to. Several atmospheric river events struck the state in january and march, bringing down record rain amounts, flooding, and in the mountains, near record snowpack levels.

It’s been an unusually dry january in northern california but there are signs of a weather pattern change as february begins. This atmospheric river will bring steady rain focused in northern california through early this week, and heavy mountain snow from southern oregon into.