Enter any address in Bon Homme County, South Dakota to see its FEMA flood zone
River overflow along area streams and rivers is the dominant flood character for Bon Homme County. Between 2003 and 2023, NOAA Storm Events data recorded 94 flood events and 13 flash flood events. Recent significant rainfall in June 2024 resulted in widespread totals of 5 to over 15 inches, leading to major to record flooding along area streams and rivers, with extensive overland flooding reported. In January 2024, elevated river levels from the Niobrara River also pushed toward or above Action Stage, causing minor flooding impacts.
National Flood Insurance Program (NFIP) claims data shows that properties in Zone X Unshaded, areas with reduced flood risk, have experienced claims averaging $12,092 with an average water depth of 1.0 foot. Residents with properties located near streams and rivers, or those in areas identified as Zone X Unshaded, should pay particular attention to flood risk information.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
24 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Bon Homme County, South Dakota has recorded 107 flood-related events since 1996 according to NOAA's Storm Events Database, including 13 flash floods and 94 river or area floods. The county has received 32 federal disaster declarations, 6 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1976–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storms, Straight-line Winds, And Flooding | Flood | Jun 16, 2024 |
| Severe Storm, Straight-line Winds, Tornadoes, And Flooding | Severe Storm | May 12, 2022 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Winter Storm, Snowstorm, And Flooding | Flood | Mar 13, 2019 |
| Severe Storms And Flooding | Severe Storm | Jun 2, 2008 |
| Severe Storms, Tornadoes, And Flooding | Severe Storm | May 4, 2007 |
| Severe Winter Storm | Severe Storm | Nov 27, 2005 |
| Hurricane Katrina Evacuation | Coastal Storm | Sep 6, 2005 |
| Severe Flooding, Sever Winter Storms,heavy Rains High Winds | Flood | Feb 3, 1997 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Jun 22, 2024 | 0.00K |
| Flood | Jun 21, 2024 | 0.00K |
| Flood | Jun 21, 2024 | 1.17M |
| Flood | Jan 11, 2024 | 0.00K |
| Flood | Jul 1, 2024 | 0.00K |
| Flood | Apr 28, 2023 | 0.00K |
| Flood | Oct 12, 2023 | 0.00K |
| Flood | May 1, 2023 | 0.00K |
| Flood | Jan 21, 2020 | 0.00K |
| Flood | Feb 13, 2020 | 0.00K |
Flood — Jun 22, 2024
A multi-day significant heavy rainfall event from June 20-22 resulted in widespread rain totals between 5 and 10 inches with pockets in excess of 15 inches across portions of southeast South Dakota, northwest Iowa, and southwest Minnesota. As rainfall reached area streams and rivers, major to record flooding was observed, devastating several towns and communities. Extensive overland flooding al...
Flood — Jun 21, 2024
A multi-day significant heavy rainfall event from June 20-22 resulted in widespread rain totals between 5 and 10 inches with pockets in excess of 15 inches across portions of southeast South Dakota, northwest Iowa, and southwest Minnesota. As rainfall reached area streams and rivers, major to record flooding was observed, devastating several towns and communities. Extensive overland flooding al...
Flood — Jan 11, 2024
Elevated river levels out of the Niobrara River in north central Nebraska from seasonal freeze-up and silt deposit resulted in river levels at a few gages upstream of Gavins Point Dam pushing toward or above Action Stage. Impacts during the cold season from Minor Flooding are limited to seasonal cabins and recreation roads and thus cause minimal issues.
Flood — Jul 1, 2024
River levels from the historic June flooding remained above flood stage for some locations into July, although continued a declining trend.
Flood — Apr 28, 2023
Rapid snowmelt from a few day period of well above normal temperatures focused on the 11-13th of April resulted in moderate to locally major flooding through much of the James River Basin. Some areas north of I-90 lost between 2 to 5 inches of snow water equivalent (SWE) from the first to second week of April, but antecedent drought conditions resulted in only a percentage of this water actuall...
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 Bon Homme County, South 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 Bon Homme County, South 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.