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Flood in Nevada County, California
29 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
NCEI records 29 flood events in Nevada County, California, between 1950 and 2026, spread over 11 years.
December is the busiest month, with 8 of the recorded events. The last 20 years account for 26 events against 3 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.4% of the 7,136 flood events recorded in California; its 3.0 per 100 square miles compares with 4.6 statewide.
Compared with California
| Measure | Nevada County | California | US |
|---|---|---|---|
| Flood events since 1950 | 29 | 7,136 | 183,559 |
| Per 100 square miles | 3.0 | 4.6 | 5.2 |
| Per 10,000 residents | 2.8 | 1.8 | 5.5 |
| Deaths recorded | 0 | 121 | 2,961 |
| Busiest month | December | January | June |
By year
Seasonality
4Feb
6Mar
2Apr
2May
0Jun
1Jul
2Aug
2Sep
1Oct
1Nov
0Dec
8
Recorded events
All 29 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 11 Apr 2026 | Flood | — | — | — | — | — | County |
| 25 Dec 2025 | Flood | — | — | — | — | — | County |
| 22 Dec 2025 | Flood | — | — | — | — | — | County |
| 22 Dec 2025 | Flood | — | — | — | — | — | County |
| 21 Dec 2025 | Flood | — | — | — | — | — | County |
| 27 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 26 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 13 Feb 2025 | Flood | — | — | — | — | — | County |
| 1 Feb 2025 | Flood | — | — | — | — | — | County |
| 5 Feb 2024 | Flood | — | — | — | — | — | County |
| 5 Feb 2024 | Flood | — | — | — | — | — | County |
| 5 Feb 2024 | Flood | — | — | — | — | — | County |
| 13 Jun 2023 | Flood | — | — | — | — | — | County |
| 14 Jan 2023 | Flood | — | — | — | — | — | County |
| 24 Oct 2021 | Flash Flood | — | — | — | — | — | County |
| 18 Sep 2019 | Flood | — | — | — | — | — | County |
| 6 Apr 2018 | Flood | — | — | — | — | — | County |
| 21 Mar 2018 | Flood | — | $100K | — | — | — | County |
| 8 Feb 2017 | Flood | — | $3.6M | — | — | — | County |
| 7 Jan 2017 | Flood | — | $10K | — | — | — | County |
| 7 Jan 2017 | Flood | — | — | — | — | — | County |
| 11 Dec 2016 | Flood | — | $5K | — | — | — | County |
| 10 Dec 2016 | Flood | — | $30K | — | — | — | County |
| 10 Dec 2016 | Flood | — | $10K | — | — | — | County |
| 13 Mar 2016 | Flood | — | — | — | — | — | County |
| 30 Jan 2016 | Flood | — | $20K | — | — | — | County |
| 31 Dec 2005 | Flood | — | $1.0M | — | — | — | County |
| 18 Jul 2002 | Flash Flood | — | — | — | — | — | County |
| 18 Jul 2002 | Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Nevada County had?
29 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Nevada County?
11 Apr 2026 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Nevada County?
The flood of 8 Feb 2017, with property damage estimated by NCEI at $3.6M.
How does Nevada County compare with California for flood?
3.0 events per 100 square miles against 4.6 statewide; the county holds 29 of the state's 7,136 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.