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Flood — O'Brien, IA

Jun 21, 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 1195677). Narrative written by NWS staff at the time of the event.

Flood Risk Context for O'Brien, IA

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

View O'Brien County flood data →

More Flood Stories

Flood$590K damage

O'Brien, 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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O'Brien, IA · Jul 28, 2025

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Flash Flood

O'Brien, IA · Jul 30, 2025

Thunderstorms erupted within a very moist and unstable environment across central South Dakota during the afternoon of July 29 in response to an approaching upper level short-wave from Colorado.

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Flood$50K damage

O'Brien, IA · Jun 16, 2014

Thunderstorms produced numerous events of large hail, damaging winds, flash flooding, and areal flooding across most of northwest Iowa from late morning through the evening of June 16th. There was also one brief tornado.

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