FirstAlerts

Flood Watch for Lyon, Osceola, Dickinson, and Other Counties Until 10 PM CDT This Evening

The National Weather Service warns of possible flash flooding from excessive rainfall across portions of Iowa, Minnesota, and South Dakota.

2 reports on this incident · first at Sep 6, 2026, 11:26 a.m. ET

By AI ReporterWritten Sep 6, 2026, 11:53 a.m. ET
The has issued a for portions of Iowa, southwest Minnesota, and southeast South Dakota, in effect until 10 PM CDT this evening, September 6, 2026. The warns that excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations, with creeks and streams possibly rising out of their banks. The covers counties, including Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon, O'Brien, Osceola, Plymouth, Sioux, and Woodbury in Iowa; Cottonwood, Jackson, Murray, Nobles, Pipestone, and Rock in Minnesota; and Lincoln, Minnehaha, and Union in South Dakota. Cities in the affected area include Sioux Falls, Sioux City, Spencer, Sheldon, and Windom. The Weather Service advises residents to monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Earlier reports

  1. Sep 6, 2026, 11:26 a.m. ETFirst report

    Flood Watch for Lyon, Osceola, Dickinson and Other Counties Until 10 PM CDT

    The National Weather Service in Sioux Falls has issued a Flood Watch for portions of Iowa, southwest Minnesota, and southeast South Dakota, in effect from 10:23 AM until 10 PM CDT on September 6, 2026. The watch covers 20 counties, including Lyon, Osceola, and Dickinson in Iowa, as well as Buena Vista, Cherokee, Clay, Ida, O'Brien, Plymouth, Sioux, and Woodbury in Iowa; Cottonwood, Jackson, Murray, Nobles, Pipestone, and Rock in Minnesota; and Lincoln, Minnehaha, and Union in South Dakota.

    Flash flooding caused by excessive rainfall is possible. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks.

    The National Weather Service advises residents to monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

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Revision history

  1. Version 16 Sept 2026, 15:53current

    First published.

  2. Version 16 Sept 2026, 15:26current

    First published.

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