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Flood — Sioux, IA

Jun 20, 2024

A multi-day significant heavy rainfall event from June 20-22 resulted in widespread rain totals between 5 and 10 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 also resulted in significant impacts and damages. All river crest information is preliminary until made official by the gauge owner.||A Presi

Source: NOAA National Weather Service Storm Events Database (event 1195645). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Sioux, IA

This event is one of many recorded floods in Sioux County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

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More Flood Stories

Flash Flood$1.5M damage

Sioux, IA · Aug 5, 2023

An outflow boundary from earlier day convection focused a gradient of instability and storm development with additional destabilization from heating by early afternoon.

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Flash Flood$100K damage

Sioux, IA · Aug 5, 2023

An outflow boundary from earlier day convection focused a gradient of instability and storm development with additional destabilization from heating by early afternoon.

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Flood$610K damage

Sioux, IA · Mar 13, 2019

Rainfall of one to three inches on frozen ground and into a snow pack with between 1 and 3 inches of liquid water equivalent resulted in considerable areal flooding and flooding of small streams.

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Flash Flood

Sioux, IA · Aug 5, 2023

An outflow boundary from earlier day convection focused a gradient of instability and storm development with additional destabilization from heating by early afternoon.

Read the full account →