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Local Info
Critical Stages
8' - Action9' - Flood11' - Moderate Flood16' - Major Flood
Big Sioux River - Gauge CSWS2
Castlewood, SD
Lat: 44.73N, Lon: 97.04W
 
Latest Observation
 Updated: 5:45 PM CDT 10/10/25
Stage:5.76 ft
Flow:0.142 kcfs*
* Thousand cubic feet per second
Forecast
There are no Hydrographs available for this location.
Flood Impacts
Historical Crests
Historical crest information is not available.

Data provided by NOAA Advanced Hydrologic Prediction Service

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