8/26/2025 8:47:00 AM until 8/27/2025 3:00:00 AM

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/abr. The next statement will be issued by late tonight at 300 AM CDT.

The Flood Warning continues for the following rivers in South Dakota... Big Sioux River Near Castlewood affecting Hamlin County. .For sites with a river forecast, the forecast includes precipitation through the next 24 hours. Any future precipitation could affect the forecasts. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Big Sioux River near Castlewood. * WHEN...Until late tonight. * IMPACTS...At 9.0 feet, Water overtops the culvert on 184th Street and significant agricultural flooding begins north of Castlewood. * ADDITIONAL DETAILS... - At 7:45 AM CDT Tuesday the stage was 9.4 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 AM CDT Tuesday was 9.9 feet. - Forecast...The river is expected to fall below flood stage late this evening and continue falling to 8.4 feet Sunday morning. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood