Enter any address in San Juan County, New Mexico to see its FEMA flood zone
Flash flooding from thunderstorms is the primary flood hazard in San Juan County. Over the past 30 years, the NOAA Storm Events Database recorded 53 flash flood events and one additional flood event. Recent examples include flash flooding in normally dry arroyos, such as the Estes Arroyo northwest of Aztec in October 2025, which washed away a vehicle. In June 2025, flash flooding occurred in Farmington as a result of widespread showers and storms.
While flood insurance claims data shows a mix of zones, homeowners in Zone A experienced the highest number of claims with an average water depth of 7.2 feet. Properties in Zone X also saw a significant number of claims, with an average payout of over $21,000 and an average water depth of 2.9 feet. Residents in flood-prone areas, particularly those in Zone A and Zone X, should pay close attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
38 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
San Juan County, New Mexico has recorded 54 flood-related events since 1996 according to NOAA's Storm Events Database, including 53 flash floods and 1 river or area floods. The county has received 11 federal disaster declarations, 2 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1977–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| South Fork Fire, Salt Fire, And Flooding | Fire | Jun 17, 2024 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Flooding, And Mudslides | Flood | Sep 9, 2013 |
| Blanco (cr 4901) Fire | Fire | Jun 18, 2012 |
| Severe Storms And Flooding | Flood | Jul 25, 2010 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Severe Fire Threats | Fire | May 5, 2000 |
| Severe Forest Fire | Fire | May 5, 2000 |
| Severe Ice Storms, Flooding And Heavy Rains | Severe Storm | Jul 16, 1999 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Oct 10, 2025 | 0.00K |
| Flash Flood | Jun 3, 2025 | 10.00K |
| Flash Flood | Jun 2, 2025 | 0.00K |
| Flash Flood | Jun 27, 2024 | 250.00K |
| Flash Flood | Aug 25, 2024 | 100.00K |
| Flash Flood | Aug 25, 2024 | 500.00K |
| Flash Flood | Jun 21, 2024 | 500.00K |
| Flash Flood | May 20, 2023 | 0.00K |
| Flash Flood | Jul 26, 2022 | 130.00K |
| Flash Flood | Aug 17, 2022 | 75.00K |
Flash Flood — Oct 10, 2025
Subtropical moisture associated with the remnants of Hurricane Priscilla in the eastern Pacific moved across northwest New Mexico on October 10th resulting in scattered shower and thunderstorm activity across this part of the state. Thunderstorms resulted in flash flooding in the normally dry Estes Arroyo northwest of Aztec. These floodwaters washed away a vehicle driving through the arroyo at ...
Flash Flood — Jun 3, 2025
An upper low moved across the desert southwest June 1st into June 2nd helping to pull up higher moisture from former Tropical Storm Alvin in the eastern Pacific. Widespread showers and storms developed across New Mexico during the day June 2nd as the upper low moved into the state. Storms resulted in severe wind gusts in Clovis, penny size hail and flash flooding in Albuquerque and Farmington. ...
Flash Flood — Jun 2, 2025
An upper low moved across the desert southwest June 1st into June 2nd helping to pull up higher moisture from former Tropical Storm Alvin in the eastern Pacific. Widespread showers and storms developed across New Mexico during the day June 2nd as the upper low moved into the state. Storms resulted in severe wind gusts in Clovis, penny size hail and flash flooding in Albuquerque and Farmington. ...
Flash Flood — Jun 27, 2024
Record levels of monsoon moisture remained in place across NM as an upper level disturbance approached from the west and pushed the upper level high over the state south into New Mexico. Showers and thunderstorms developed over the high terrain in northeastern New Mexico midday June 26th, spreading over central and eastern NM during the afternoon and evening hours. These outflow boundaries prod...
Flash Flood — Aug 25, 2024
A plume of monsoon moisture streamed northward over western and central NM, coupled with strong wind shear in the atmosphere. Strong to severe thunderstorms developed along and west of the Continental Divide in New Mexico on August 25th, tracking north to northeast. One storm developed south of Shiprock, NM and moved northward through town. Locally heavy rainfall combined with overgrowth of veg...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in San Juan County, New Mexico:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in San Juan County, New Mexico that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.