Flash Flood — Nevada, California

2025-08-27 · near Flonston, Nevada, California

Event narrative

Flash flooding with mud and debris on westbound I-80 resulting in a lane closure. Upwards of 1.21 inches of rain was recorded during the incident.

Wider weather episode

A high amount of atmospheric moisture in the region interacted with a short-wave trough, allowing for widespread heavy precipitation. This was day five of an extended push of monsoon moisture that produced heavy rain, localized flooding, strong outflow winds.

View location on OpenStreetMap → (39.4000, -120.0200)

Source: NOAA Storm Events Database, event_id 1280336. Narrative written by the NWS forecast office that issued the report.