Skip to content
NWS / NWPSSite ID: BSWS2active

NWS / NWPS BSWS2

Big Sioux River below Watertown

Big Sioux River • Codington • SD

Latest public reading21 cfsObserved Sep 30, 2008 at 11:45 PM CDT
TrendRisingNo forecast linked
Data freshness DelayedObservation 40 minutes old
Flood contextNo source flood categoryFetched Timestamp unavailable

Stage and discharge

Observed source readings

7D30D1Y5Y

Stage and discharge

Daily rollups and linked forecast values

Observed

Stage and discharge chart includes 2 observed points.

Line chart: Observed01234562026-05-122026-05-14
Data series

Flood-stage context

Source-published thresholds where available

Action10 ftSource-backed threshold
Minor flood11 ftSource-backed threshold
Moderate flood11.5 ftSource-backed threshold
Major flood12 ftSource-backed threshold

Forecast

Linked NWS/NWPS values

Forecast unavailable

Forecasts are not available for this gauge in RiverStat.us launch sources.

Observations

stage

4.99 ft

Observed May 13, 2026 at 7:00 PM CDT

stage

5.12 ft

Observed May 11, 2026 at 7:00 PM CDT

Alerts

Alerts unavailable

Alerts are shown only when the API returns a source-backed match.

Official public sources

Readings and thresholds stay tied to USGS, NOAA/NWS, or source-backed records.

Source freshness

Observed and fetched timestamps are shown separately when the API returns them.

Transparent methodology

Unavailable forecasts, alerts, and thresholds are shown as unavailable states.

RiverStat.us is an independent public data viewer and is not affiliated with USGS or NOAA.

A clear view of U.S. river conditions, gauges, and forecasts.

RiverStat.us aggregates public water data from official and public sources. Data may be delayed, provisional, missing, incorrect, or later corrected by the source.

Data from USGS Water Data and NOAA/NWS.