Flash Flood in Washoe County, Nevada
Flash Flood August 27, 2025 · Washoe County, Nevada
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Nevada Department of Transportation reported a road closure due to flooding and debris on both the westbound and eastbound I-80 near Derby Dam.
The wider storm
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.
Began near Thisbe (39.5722, -119.4823).
Source: NOAA Storm Events Database, event 1280751. Narratives are written by the National Weather Service forecast office that issued the report.
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