Enter any address in Sully County, South Dakota 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.
Sully County, South Dakota has recorded 14 flood-related events since 1996 according to NOAA's Storm Events Database, including 4 flash floods and 10 river or area floods. The county has received 16 federal disaster declarations, 7 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1976–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Winter Storm, Snowstorm, And Flooding | Flood | Mar 13, 2019 |
| Severe Winter Storm | Severe Storm | Dec 24, 2016 |
| Flooding | Flood | Mar 11, 2011 |
| Flooding | Flood | Mar 10, 2010 |
| Severe Winter Storm | Severe Storm | Jan 20, 2010 |
| Hurricane Katrina Evacuation | Coastal Storm | Sep 6, 2005 |
| Severe Storm | Severe Storm | Jun 7, 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 | Mar 27, 2019 | 0.00K |
| Flood | May 1, 2019 | 0.00K |
| Flood | Jun 1, 2019 | 0.00K |
| Flood | Apr 1, 2019 | 181.30K |
| Flood | Jun 20, 2011 | 0.00K |
| Flood | Mar 15, 2011 | 0.00K |
| Flood | Apr 1, 2011 | 0.00K |
| Flash Flood | Jul 14, 2009 | 0.00K |
| Flash Flood | Jun 12, 2007 | 0.00K |
| Flash Flood | Aug 3, 2007 | 0.00K |
Flood — Mar 27, 2019
Much above normal winter snowfall and melt water/ice jams along with heavy rains in the middle of March brought flooding across parts of central and northeast South Dakota for late March. Rivers and creeks flooded across much of the area along with many fields and roads. The flooding damaged many of the roads and culverts across the region. Some structures were also flooded. Lake levels also ro...
Flood — May 1, 2019
March and April snowmelt and heavy rain flooding along with above normal May precipitation resulted in hundreds of thousands of acres of crops damaged or delayed/unplanted across central and northeast South Dakota. The widespread flooding continued into June with millions of dollars of loss.
Flood — Jun 1, 2019
Spring snowmelt and heavy rain flooding from March, April, and May continued into June. This combined with above normal June rainfall resulted in hundreds of thousands of acres of crops damaged or unplanted across central and northeast South Dakota. For the entire state of South Dakota, nearly 4 million acres of crops were left unplanted as a result of the flooding. Total damaged or unplanted c...
Flood — Apr 1, 2019
The continuation of snowmelt from a much above normal snowfall winter combined with a historic heavy snow/blizzard in mid-April resulted in widespread flooding across central and northeast South Dakota. Countless roads along with thousands of acres of cropland were flooded throughout April. Impacts include damaged roads, culverts, and bridges, and livestock, homes, and businesses were affected....
Flood — Jun 20, 2011
A large upper level low pressure area along with deep moisture brought very heavy rains to central, north central, and northeast South Dakota. Rainfall amounts of 3 to 7 inches occurred across much of the area resulting in widespread flooding. Many creeks were flooded along with many roads and thousands of acres of crop and pastureland by the two day heavy rain event. Many roads were closed acr...
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 Sully 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 Sully 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.