Flash Flood — Washoe, Nevada

2025-08-27 · near Thisbe, Washoe, Nevada

Event narrative

Nevada Department of Transportation reported a road closure due to flooding and debris on both the westbound and eastbound I-80 near Derby Dam.

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 → (39.5722, -119.4823)

Source: NOAA Storm Events Database, event_id 1280751. Narrative written by the NWS forecast office that issued the report.