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Flash Flood — Washoe, NV

Aug 25, 2025

A four corners high pressure continued to allow for a high amount of atmospheric moisture to move north into the region as it interacted with a short-wave trough. This was day three of an extended push of monsoon moisture that produced heavy rain, localized flooding, strong outflow winds.

Source: NOAA National Weather Service Storm Events Database (event 1279917). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Washoe, NV

This event is one of many recorded floods in Washoe County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Washoe County flood data →

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A strong atmospheric river brought heavy rain with widespread flooding on the 8th and 9th. There was a period of snow on the 7th, as well as freezing rain in some lower valleys into the morning of the 8th.

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Flood$1.0M damage

Washoe, NV · Jan 8, 2017

A strong atmospheric river brought heavy rain with widespread flooding on the 8th and 9th. There was a period of snow on the 7th, as well as freezing rain in some lower valleys into the morning of the 8th.

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Flash Flood$1.0M damage

Washoe, NV · Jun 21, 2002

Flash flooding struck the Spanish Springs area when an estimated 2 inches of rain fell between 6:20 p.m. and 7:20 p.m. PDT. Most flooding occurred on the west side of Spanish Springs valley where heavy rain fell on hills left nearly barren from a recent wildfire.

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Flash Flood$25K damage

Washoe, NV · Jul 9, 2015

Persistent moderate to high atmospheric moisture combined with daytime heating to produce thunderstorms (many with heavy rainfall) early in the month. Periods of slow-moving thunderstorms combined with the heavy rain to bring flash flooding to western Nevada.

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