56
Recorded events
0
Direct deaths
0
Direct injuries
$1.6M
Property damage
Flood in Hanson County, South Dakota: 56 recorded events between 2007 and 2024. The strongest on record measured 0. That places the county #204 nationally and #15 statewide for this hazard.
Decade by decade
Flood in Hanson County, South Dakota: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flood in Hanson County is the 2010s, when 29 of the county's 56 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Hanson County archive, flood makes up 23.0% of all recorded severe weather across 7 hazard types. Nationally the county sits at #204 for this hazard and #15 within South Dakota, putting it in the 93.1 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for flood in Hanson County with 12 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jul 1, 2024 | PLANO | 0 | $0 |
| Jun 21, 2024 | PLANO | 0 | $0 |
| Jun 21, 2024 | ROCKPORT | 0 | $251K |
| Jun 1, 2023 | PLANO | 0 | $0 |
| May 1, 2023 | PLANO | 0 | $0 |
| Apr 18, 2023 | PLANO | 0 | $0 |
| Aug 1, 2022 | PLANO | 0 | $0 |
| Jul 1, 2022 | PLANO | 0 | $0 |
| Jun 1, 2022 | PLANO | 0 | $0 |
| May 30, 2022 | PLANO | 0 | $0 |
Other hazards here
More from Hanson County
- Hail 90
- Thunderstorm Wind 74
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
September 10-12 brought up to 8.30 inches of rainfall at Alexandria, producing widespread areal flooding. The spillway at Hanson Lake washed out and damaged the roadway below the spillway. Numerous state, county and township roads were impassable due to water, including State Highway 42 east of Ethan. The property damage costs include estimates for public property losses. Flooding also resulted in crop losses across the area. Crop loss estimates provided by the United States Department of Agriculture.
Major flooding of the James River, as well as flooding of small streams and lakes in the county, continued through April. Much farmland remained flooded, both near to and away from the James River. The James River was at its highest on April 1st, and fell very slowly during the month. A large area of land and numerous roads were flooded at the start of the month. Water was running over other roads, from flooded streams, creeks, and fields as well as from the James River. Many roads were heavily damaged. Some homes and businesses were also flooded, with the flooding of these places slowly alleviating through the month. High water and groundwater levels from record precipitation in the year 2010, a main reason the flooding onset was so fast in March, was also a main reason that the flooding subsided so slowly during April.
Rainfall amounts across Hanson County from June 20-22 ranged from 6 to 8 inches. Overland flooding ensued with additional major flooding along the James River. Several roads were closed and damaged due to flooding. Preliminary damage assessments estimate loss to public infrastructure across the county to be 251 thousand dollars. The majority of overland flooding subsided by June 25, but river flooding continued through the end of the month. For additional information on river flooding, please see other flood entries for Hanson County.
Quick answers
Frequently asked
How many flood events are on record in Hanson County, South Dakota?
56 flood events are recorded in Hanson County between 2007 and 2024, causing 0 direct deaths.
What is the strongest flood recorded in Hanson County?
The strongest flood on record in Hanson County measured 0.
Where does the flood data for Hanson County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flood in Hanson County, South Dakota.” Severe Weather History. severeweatherhistory.com/county/south-dakota/hanson-county/flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.