A major atmospheric river swept across Southern California on December 24–25, flooding roads, prompting evacuations, and disrupting holiday travel.
Over 150 mm (6 inches) of rainfall was recorded in mountainous areas of Los Angeles and Ventura counties. Flash flooding, debris flows, and power outages affected multiple communities as officials urged residents to avoid travel until conditions improved.
This atmospheric river produced sustained rainfall from late December 24 into Christmas Day, with rates locally exceeding 25 mm (1 inch) per hour. Coastal and valley areas received around 75–150 mm (3–6 inches), while higher terrain recorded up to 250 mm (10 inches)…