Tripp County, South Dakota
Natural disaster risk, federal disaster history and flood insurance facts.
Tripp County, South Dakota has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 64% of US counties. It ranks 23rd of 66 counties in South Dakota. The costliest hazards here are cold waves, inland flooding and tornadoes. FEMA estimates about $8.3 million a year in expected losses, or roughly $1,474 per resident. Since 1976 it has been included in 18 federal disaster or emergency declarations for natural events (16 major disasters). The most recent was in August 2024 (severe storms, straight-line winds and flooding). Only 1 home here carries federal flood insurance.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in Tripp County
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
- Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
- Price a flood policy now. Most new federal policies take 30 days to start.
- Pick a shelter spot: a basement, or an inside room on the lowest floor with no windows.
- Turn on emergency alerts on your phone and keep a weather radio.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Cold wave | 83.3 | $3M | ||
| Inland flooding | 37.1 | $3M | ||
| Tornado | 37.7 | $553K | ||
| Hail | 67.0 | $355K | ||
| Wildfire | 79.1 | $267K | ||
| Strong wind | 28.6 | $200K | ||
| Winter weather | 80.8 | $159K | ||
| Drought | 55.0 | $149K | ||
| Ice storm | 55.1 | $77K | ||
| Heat wave | 24.6 | $67K | ||
| Lightning | 19.3 | $48K | ||
| Earthquake | 23.2 | $27K | ||
| Landslide | 15.4 | $48 |
Scores are percentiles: a score of 90 means higher risk than about 90% of US counties for that hazard. Hazards FEMA does not rate here are left out. Social vulnerability is very high and community resilience is relatively moderate in FEMA's measures.
Federal disaster history
Recent disasters nationwide ›Declarations by decade
Federal declarations for natural events that included Tripp County. 2020s bar runs to November 2026.
By type
Most recent
Show all 18
South Dakota also had 46 statewide declarations that did not name single counties.
Storm history since 1957
Tornado risk by county ›The National Weather Service has logged 597 storm reports in Tripp County since 1957, with 0 deaths and 2 injuries and about $5 million in reported damage. The strongest on record here was an F5 tornado on May 8, 1965.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| May 8, 1965 | F5 | – | 1 / 0 |
| May 22, 2010 | EF2 | Winner | 0 / 0 |
| Jun 30, 1957 | F2 | – | 0 / 0 |
| Apr 18, 1957 | F2 | – | 0 / 0 |
| May 8, 1965 | F2 | – | 0 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| May 8, 1965 | Tornado | – | $3M |
| May 29, 2010 | Hail | Colome | $600K |
| Jun 6, 1994 | Thunderstorm Wind | Winner | $500K |
| Jun 24, 2009 | Thunderstorm Wind | Winner | $400K |
| Jun 5, 2008 | Flash Flood | Colome | $250K |
| Jun 8, 2004 | Flash Flood | Winner | $200K |
Source: NOAA Storm Events Database, county-based reports through Jul 25, 2026. Tornado records start in 1950, hail and wind in 1955, and floods and other storm types in 1996, so older decades undercount. Damage is in dollars of the year it happened and is often an estimate. Winter storms, heat and hurricanes are logged by forecast zone, not county, so they are not counted here.
Flood insurance in Tripp County
Check your address flood zone ›National Flood Insurance Program (NFIP) records only; private flood policies are not included. Home counts as of Aug 3, 2026. Since 2021 NFIP prices each home separately under Risk Rating 2.0, so your price depends on the building, not the county. Ask an agent for a quote.
Homes in Tripp County
Older homes and mobile homes usually suffer more damage in storms, floods and earthquakes, and can cost more to insure. If you are buying, ask about roof age, foundation bolting and any retrofits. Source: US Census Bureau, American Community Survey 2020 to 2024 5-year estimates; 2,762 housing units.
Compare in South Dakota
All 66 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| Minnehaha County | Tornado | |
| Pennington County | Inland flooding | |
| Lincoln County | Tornado | |
| Brown County | Cold wave | |
| Brookings County | Inland flooding | |
| Meade County | Inland flooding | |
| Codington County | Inland flooding | |
| Lawrence County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Todd County | 11 | |
| Cherry County, NE | 9 | |
| Gregory County | 20 | |
| Lyman County | 14 | |
| Mellette County | 12 | |
| Keya Paha County, NE | 11 |
Common questions about Tripp County
What is the biggest natural hazard in Tripp County?
Cold wave has the highest expected yearly losses in Tripp County, about $3.2 million a year in FEMA's estimate. Inland flooding is second at $3.1 million.
How many federal disasters has Tripp County had?
Tripp County has been included in 18 federal disaster or emergency declarations for natural events since 1976, including 16 major disasters. The most recent was Severe Storms, Straight-Line Winds, and Flooding in August 2024.
Is Tripp County a high-risk place to live?
Its overall rating is Very Low, 23rd highest of 66 in South Dakota. A county rating covers the whole area. Risk at one address can be much higher or lower, so check the FEMA flood map and ask about the home's history.
Do I need flood insurance in Tripp County?
Standard home insurance does not cover flooding. Lenders require it in mapped high-risk zones, but many flood claims come from outside those zones.
How many tornadoes has Tripp County had?
NOAA records list 35 tornadoes in Tripp County since 1950. The strongest was an F5 tornado on May 8, 1965. The weather service has also logged 283 hail reports and 28 floods here.
Sources: FEMA National Risk Index (December 2025), OpenFEMA Disaster Declarations Summaries, and NFIP policy and claims data. Hazard Compass is independent and not affiliated with FEMA. These figures describe the whole county, not a single property, and are not insurance or safety advice. Report a problem.