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South Dakota Flood Stories

999 first-hand accounts of flood events in South Dakota, ranked by impact. Each is a NOAA-written narrative of the moment.

Flash Flood

Marshall, SD · Jun 13, 2025

A broad low-pressure system brought several rounds of rain and a few strong, isolated thunderstorms to northeast South Dakota. The rain began on the morning of June 12th.

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Flash Flood

Minnehaha, SD · Jul 23, 2025

A cluster of thunderstorms erupted within a very moist and unstable airmass ahead of a slow moving frontal boundary during the evening of July 23.

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Flash Flood

Minnehaha, SD · Jul 23, 2025

A cluster of thunderstorms erupted within a very moist and unstable airmass ahead of a slow moving frontal boundary during the evening of July 23.

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Flash Flood

Minnehaha, SD · Jul 23, 2025

A cluster of thunderstorms erupted within a very moist and unstable airmass ahead of a slow moving frontal boundary during the evening of July 23.

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Flash Flood

Marshall, SD · Aug 5, 2025

A line of storms produced large hail and high winds during the afternoon and evening of August 5th, and into the early morning hours of August 6th. The largest sized hail measured at 3 inches in diameter was observed in Hoven.

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Flash Flood

Codington, SD · Aug 5, 2025

A line of storms produced large hail and high winds during the afternoon and evening of August 5th, and into the early morning hours of August 6th. The largest sized hail measured at 3 inches in diameter was observed in Hoven.

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Flash Flood

Roberts, SD · Aug 5, 2025

A line of storms produced large hail and high winds during the afternoon and evening of August 5th, and into the early morning hours of August 6th. The largest sized hail measured at 3 inches in diameter was observed in Hoven.

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Flash Flood

Union, SD · Jul 24, 2025

A cluster of thunderstorms erupted within a very moist and unstable airmass ahead of a slow moving frontal boundary during the evening of July 23.

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Flood

Corson, SD · May 16, 2025

More seasonal rainfall was observed in middle to late May across north central South Dakota. A local area of moderate to heavy rain, between 4 to 6 inches, was observed with a system on May 15th and 16th, with the COOP observer located 8 miles south southwest of Keldron…

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Flood

Corson, SD · May 20, 2025

More seasonal rainfall was observed in middle to late May across north central South Dakota. A local area of moderate to heavy rain, between 4 to 6 inches, was observed with a system on May 15th and 16th, with the COOP observer located 8 miles south southwest of Keldron…

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Flood

Corson, SD · May 20, 2025

More seasonal rainfall was observed in middle to late May across north central South Dakota. A local area of moderate to heavy rain, between 4 to 6 inches, was observed with a system on May 15th and 16th, with the COOP observer located 8 miles south southwest of Keldron…

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Flood

Clark, SD · Jul 23, 2025

Multiple clusters of storms moved across portions of central, north central and northeast South Dakota on the morning of July 23rd. Many of these storms produced strong winds and wind related damage.

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Flood

Grant, SD · Jun 25, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

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Flood

Grant, SD · Jun 26, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

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Flood

Roberts, SD · Jun 13, 2025

A broad low-pressure system brought several rounds of rain and a few strong, isolated thunderstorms to northeast South Dakota. The rain began on the morning of June 12th.

Read the full account →
Flood

Grant, SD · Jun 13, 2025

A broad low-pressure system brought several rounds of rain and a few strong, isolated thunderstorms to northeast South Dakota. The rain began on the morning of June 12th.

Read the full account →
Flood

Grant, SD · Jun 26, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

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Flood

Codington, SD · Jun 26, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

Read the full account →
Flood

Grant, SD · Jun 25, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

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Flood

Grant, SD · Jun 26, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

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Flood

Day, SD · Jun 26, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

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Flood

Roberts, SD · Jun 25, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

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Flood

Codington, SD · Jul 28, 2025

An afternoon thunderstorm developed near the town of Henry and very quickly spun up a violent tornado. This tornado would cause significant damage to a farmstead before dissipating.

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Flood

Codington, SD · Jul 28, 2025

An afternoon thunderstorm developed near the town of Henry and very quickly spun up a violent tornado. This tornado would cause significant damage to a farmstead before dissipating.

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