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NWS / NWPSSite ID: BBDS2active

NWS / NWPS BBDS2

Missouri River at Big Bend Dam

Missouri River • Lyman • SD

Latest public reading1,420.83 ftObserved Jun 21, 2026 at 5:00 AM CDT
TrendRisingNo forecast linked
Data freshness StaleObservation 325 minutes old
Flood contextNo source flood categoryFetched Timestamp unavailable

Stage and discharge

Observed source readings

Stage and discharge

Daily rollups and linked forecast values

Observed

Stage and discharge chart includes 13 observed points.

Line chart: Observed02004006008001.0K1.2K1.4K1.6K2026-05-222026-06-012026-06-112026-06-21
Data series

Flood-stage context

Source-published thresholds where available

Action1,422 ftSource-backed threshold
Minor flood1,422.5 ftSource-backed threshold
Moderate flood1,423 ftSource-backed threshold
Major flood1,440 ftSource-backed threshold

Forecast

Linked NWS/NWPS values

Forecast unavailable

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

Observations

stage

1,420.83 ft

Observed Jun 20, 2026 at 7:00 PM CDT

stage

1,420.65 ft

Observed Jun 18, 2026 at 7:00 PM CDT

stage

1,420.59 ft

Observed Jun 17, 2026 at 7:00 PM CDT

stage

68.9 ft

Observed Jun 15, 2026 at 7:00 PM CDT

stage

1,420.6 ft

Observed Jun 10, 2026 at 7:00 PM CDT

stage

75.9 ft

Observed Jun 8, 2026 at 7:00 PM CDT

stage

1,420.7 ft

Observed Jun 7, 2026 at 7:00 PM CDT

stage

75.8 ft

Observed Jun 2, 2026 at 7:00 PM CDT

stage

1,421.26 ft

Observed May 31, 2026 at 7:00 PM CDT

stage

71.2 ft

Observed May 30, 2026 at 7:00 PM CDT

stage

1,420.62 ft

Observed May 27, 2026 at 7:00 PM CDT

stage

71.6 ft

Observed May 22, 2026 at 7:00 PM CDT

stage

1,420.27 ft

Observed May 21, 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.