Enter any address in Jefferson County, Montana to see its FEMA flood zone
4 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Jefferson County, Montana has recorded 7 flood-related events since 1996 according to NOAA's Storm Events Database, including 3 flash floods and 4 river or area floods. The county has received 11 federal disaster declarations, 3 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1975–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Ice Jams And Flooding | Flood | Mar 1, 2014 |
| Nineteen Mile Fire | Fire | Aug 28, 2012 |
| Severe Storms And Flooding | Severe Storm | Apr 4, 2011 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Mt - Central Zone 3b Fire Complex | Fire | Jul 24, 2000 |
| Wildfires | Fire | Jul 13, 2000 |
| Severe Storms, Flooding, And Ice Jams | Severe Storm | Feb 4, 1996 |
| Severe Storms & Flooding | Flood | May 27, 1981 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Jul 29, 2025 | 0.00K |
| Flash Flood | Jun 27, 2023 | 100.00K |
| Flood | May 10, 2018 | 0.00K |
| Flash Flood | Jul 3, 2014 | 0.00K |
| Flood | Jun 7, 2011 | 0.00K |
| Flash Flood | Jul 2, 1998 | 100K |
Flood — Jul 29, 2025
A persistent troughing pattern brought in good instability and shear to produce severe thunderstorms across the region over the 3 day time frame with strong winds as the primary hazard. There was also isolated large hail. Anomalously high moisture content and slower moving storms brought localized flooding. A thunderstorm produced heavy rainfall and caused flooding in Havre and in Clear Creek o...
Flash Flood — Jun 27, 2023
An unstable airmass with a minor weather disturbance resulted in afternoon showers and thunderstorms, with locally severe weather occurring. Isolated locations also experienced flooding, such as portions of Jefferson County where Milligan Canyon Road was washed out in several locations.
Flood — May 10, 2018
As a low pressure center aloft consolidated over Washington state, isolated showers and thunderstorms developed over north-central and southwest Montana during the afternoon and early evening of May 10th, 2018. This was especially the case over and near higher terrain. One thunderstorm near Havre managed to generate severe wind gusts as the storm collapsed. Lastly, the combination of rainfall a...
Flash Flood — Jul 3, 2014
The area remained beneath an unsettled southwest flow. Occasional disturbances fueled isolated to scattered thunderstorms at times.
Flood — Jun 7, 2011
Rain and snowmelt. Presidential Disaster Declaration for Montana made on 6/17/11.
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 Jefferson County, Montana:
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 Jefferson County, Montana 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.