Flood — San Joaquin, California

2025-12-25 · near Lockeford, San Joaquin, California

Event narrative

California Highway Patrol reported a rockslide in the westbound lane of State Route 88 from heavy rain.

Wider weather episode

A prolonged period of wet weather brought heavy snowfall and strong winds to the Sierra Nevada. Heaviest snowfall was observed from 12/24-12/26 when snow levels came down below the mountain passes. Snowfall measurements over the 12/24-12/26 timeframe were around 2-5 ft per Caltrans, Ski resorts, and UC Berkeley Central Sierra Snow Lab. Southerly wind gusts of 50-80 mph were observed as well across the Valley, foothills and mountains that resulted in numerous downed trees and thousands of power outages. There were also numerous reports of flooding in the lower elevations from heavy rain, including two fatalities and 3 injuries from vehicles that hydroplaned and crashed.

View location on OpenStreetMap → (38.1598, -121.1532)

Source: NOAA Storm Events Database, event_id 1308029. Narrative written by the NWS forecast office that issued the report.