South Dakota Severe Flood Warning | Effective 07/09/2026 22:34

Headline: 
Flood Warning issued July 10 at 12:34AM CDT until July 10 at 2:57PM CDT by NWS Aberdeen SD
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
July 9, 2026 - 10:34pm
Expires: 
July 10, 2026 - 1:00pm
Description: 
...The Flood Warning is extended for the following rivers in South Dakota... Big Sioux River Near Castlewood affecting Hamlin County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Big Sioux River near Castlewood. * WHEN...Until this afternoon. * IMPACTS...At 9.0 feet, Water overtops the culvert on 184th Street and significant agricultural flooding begins north of Castlewood. * ADDITIONAL DETAILS... - At 11:45 PM CDT Thursday the stage was 9.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:45 PM CDT Thursday was 9.3 feet. - Forecast...The river is expected to fall below flood stage this morning and continue falling to 5.6 feet early Tuesday afternoon. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov/abr. The next statement will be issued this afternoon at 300 PM CDT.
Area Description: 
Hamlin, SD
Forcast Office: 
NWS Aberdeen SD