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Flood in San Juan County, New Mexico
54 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.
San Juan County, New Mexico, has 54 flood events in the NCEI record since 1950, with at least one in 19 different years.
August is the busiest month, with 19 of the recorded events. The last 20 years account for 44 events against 10 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 2.9% of the 1,880 flood events recorded in New Mexico; its 1.0 per 100 square miles compares with 1.5 statewide.
NCEI attributes 1 death in the county to floods and flash floods.
Compared with New Mexico
| Measure | San Juan County | New Mexico | US |
|---|---|---|---|
| Flood events since 1950 | 54 | 1,880 | 183,559 |
| Per 100 square miles | 1.0 | 1.5 | 5.2 |
| Per 10,000 residents | 4.5 | 8.9 | 5.5 |
| Deaths recorded | 1 | 51 | 2,961 |
| Busiest month | August | July | June |
By year
Seasonality
0Feb
0Mar
0Apr
0May
3Jun
5Jul
17Aug
19Sep
8Oct
2Nov
0Dec
0
Recorded events
All 54 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 |
|---|---|---|---|---|---|---|---|
| 10 Oct 2025 | Flash Flood | — | — | — | — | — | County |
| 3 Jun 2025 | Flash Flood | — | $10K | — | — | — | County |
| 2 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 25 Aug 2024 | Flash Flood | — | $500K | — | — | — | County |
| 25 Aug 2024 | Flash Flood | — | $100K | — | — | — | County |
| 27 Jun 2024 | Flash Flood | — | $250K | — | — | — | County |
| 21 Jun 2024 | Flash Flood | — | $500K | — | — | — | County |
| 20 May 2023 | Flash Flood | — | — | — | — | — | County |
| 17 Aug 2022 | Flash Flood | — | $75K | — | — | — | County |
| 16 Aug 2022 | Flash Flood | — | $150K | — | — | — | County |
| 16 Aug 2022 | Flash Flood | — | $200K | — | — | — | County |
| 26 Jul 2022 | Flash Flood | — | $130K | — | — | — | County |
| 5 Jul 2022 | Flash Flood | — | $25K | — | — | — | County |
| 15 Aug 2021 | Flash Flood | — | $10K | — | — | — | County |
| 27 Jul 2021 | Flash Flood | — | — | — | — | — | County |
| 21 Jul 2021 | Flash Flood | — | $150K | — | — | — | County |
| 26 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 26 Jul 2020 | Flash Flood | — | $50K | — | — | — | County |
| 29 Sep 2017 | Flash Flood | — | — | — | — | — | County |
| 30 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2016 | Flash Flood | — | $50K | — | 1 | — | County |
| 5 Aug 2016 | Flash Flood | — | $1.0M | — | — | — | County |
| 26 Aug 2015 | Flash Flood | — | $1.0M | — | — | — | County |
| 2 Aug 2015 | Flash Flood | — | — | — | — | — | County |
| 7 Jul 2015 | Flash Flood | — | $1K | — | — | — | County |
| 11 Jun 2015 | Flood | — | — | — | — | — | County |
| 9 Oct 2014 | Flash Flood | — | $50K | — | — | — | County |
| 28 Jul 2014 | Flash Flood | — | $5K | — | — | — | County |
| 13 Sep 2013 | Flash Flood | — | $50K | — | — | — | County |
| 10 Sep 2013 | Flash Flood | — | $250K | — | — | — | County |
| 10 Sep 2013 | Flash Flood | — | $50K | — | — | — | County |
| 5 Jul 2013 | Flash Flood | — | — | — | — | — | County |
| 8 Sep 2010 | Flash Flood | — | $2K | — | — | — | County |
| 8 Sep 2010 | Flash Flood | — | $10K | — | — | — | County |
| 3 Aug 2010 | Flash Flood | — | — | — | — | — | County |
| 1 Aug 2010 | Flash Flood | — | $2.0M | — | — | — | County |
| 1 Aug 2010 | Flash Flood | — | $1K | — | — | — | County |
| 31 Jul 2010 | Flash Flood | — | $100K | — | — | — | County |
| 30 Jul 2010 | Flash Flood | — | $10K | — | — | — | County |
| 25 Jul 2010 | Flash Flood | — | — | — | — | — | County |
| 23 May 2009 | Flash Flood | — | $50K | $10K | — | — | County |
| 23 May 2009 | Flash Flood | — | $10K | $1K | — | — | County |
| 6 Aug 2008 | Flash Flood | — | $1K | — | — | — | County |
| 22 Jul 2008 | Flash Flood | — | $10K | — | — | — | County |
| 8 Jul 2006 | Flash Flood | — | — | — | — | — | County |
| 9 Sep 2003 | Flash Flood | — | $20K | — | — | — | County |
| 9 Sep 2003 | Flash Flood | — | — | — | — | — | County |
| 1 Aug 1999 | Flash Flood | — | $150K | — | — | — | County |
| 9 Jul 1999 | Flash Flood | — | $20K | — | — | — | County |
| 26 Aug 1997 | Flash Flood | — | — | — | — | — | County |
| 26 Aug 1997 | Flash Flood | — | — | — | — | — | County |
| 4 Aug 1997 | Flash Flood | — | — | — | — | — | County |
| 28 Jul 1997 | Flash Flood | — | — | — | — | — | County |
| 24 Aug 1996 | Flash Flood | — | $25K | — | — | — | County |
Questions and answers
How many flood events has San Juan County had?
54 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 San Juan County?
10 Oct 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in San Juan County?
The flash flood of 1 Aug 2010, with property damage estimated by NCEI at $2.0M.
How does San Juan County compare with New Mexico for flood?
1.0 events per 100 square miles against 1.5 statewide; the county holds 54 of the state's 1,880 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.