Enter any address in Oliver County, North Dakota to see its FEMA flood zone
5 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Oliver County, North Dakota has recorded 11 flood-related events since 1996 according to NOAA's Storm Events Database, including 5 flash floods and 6 river or area floods. The county has received 21 federal disaster declarations, 9 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1966–2025)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storm, Tornadoes, And Straight-line Winds | Severe Storm | Jun 20, 2025 |
| Severe Winter Storm And Flooding | Severe Storm | Apr 22, 2022 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Flooding | Flood | Apr 5, 2011 |
| Severe Winter Storm | Severe Storm | Apr 1, 2010 |
| Severe Winter Storm | Severe Storm | Jan 20, 2010 |
| Severe Storms And Flooding | Severe Storm | Mar 13, 2009 |
| Severe Winter Storm And Record And/or Near Record Snow | Snowstorm | Oct 4, 2005 |
| Hurricane Katrina Evacuation | Coastal Storm | Aug 29, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Aug 30, 2021 | 35.00K |
| Flash Flood | Jun 12, 2011 | 20.00K |
| Flood | Jun 2, 2011 | 500.00K |
| Flood | Jul 1, 2011 | 0.00K |
| Flood | Aug 1, 2011 | 0.00K |
| Flood | Mar 6, 2009 | 88.00K |
| Flood | Apr 1, 2009 | 99.00K |
| Flash Flood | May 7, 2005 | — |
| Flash Flood | Aug 30, 2002 | — |
| Flood | Mar 21, 1997 | — |
Flash Flood — Aug 30, 2021
A few thunderstorms developed during the late morning hours over central North Dakota where southerly low level flow increased instability, and deep layer shear was elevated. Initially, a nearly stationary supercell developed over Oliver County. The storm produced large hail and damaging wind gusts, along with torrential rain that led to flash flooding and damaging gravel roads. The storm event...
Flash Flood — Jun 12, 2011
A strong short wave trough ejecting into the Northern Plains, coupled with increasing large scale ascent ahead of an upper level jet streak, brought widespread severe weather to much of southwest and south central North Dakota during the evening hours of June 12th. Favorable low level vertical wind shear increased the threat for supercellular storms and isolated tornados. Tornado Watch number 4...
Flood — Jun 2, 2011
This was part of historic flooding in North Dakota with statewide costs estimated around 1.5 billion dollars. Flooding was the result of significant winter snows and significant spring rains, not only in North Dakota but in Montana as well. Rocky Mountain snowpack was four to six times normal. Flooding was along the Missouri River from the Garrison Dam to the South Dakota border. Dams were over...
Flood — Jul 1, 2011
This was part of historic flooding in North Dakota with statewide costs estimated around 1.5 billion dollars. Flooding was the result of significant winter snows and significant spring rains, not only in North Dakota but in Montana as well. Rocky Mountain snowpack was four to six times normal. Flooding was along the Missouri River from the Garrison Dam to the South Dakota border. Dams were over...
Flood — Aug 1, 2011
This was part of historic flooding in North Dakota with statewide costs estimated around 1.5 billion dollars. Flooding was the result of significant winter snows and significant spring rains, not only in North Dakota but in Montana as well. Rocky Mountain snowpack was four to six times normal. Flooding was along the Missouri River from the Garrison Dam to the South Dakota border. Dams were over...
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 Oliver County, North Dakota:
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 Oliver County, North Dakota 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.