California Winter Storm 2024 Path. Last winter, the west coast faced a slew of atmospheric rivers that caused devastating floods and landslides. That means its pressure dropped by 24 or more millibars in 24 hours or less.

The monster storm is kicking off california’s rainy season, but officials say it doesn’t necessarily indicate how much precipitation the rest of the winter could see. A major atmospheric river storm slammed into southern california on thursday after hitting northern california hard the previous day.