IsItFlooding

Big Sioux River near Bruce, SD

Brookings County, South Dakota · USGS gauge 06479770 · NWS BRCS2 · Big Sioux River flood status · South Dakota river levels

Is Big Sioux River near Bruce, SD flooding right now?

Big Sioux River near Bruce, SD measured 3.26 ft on 2026-09-11 01:45:00 UTC. That observation was 4.7 ft below its 8 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height
3.26 ft
as of 20 min ago
Streamflow
68 cfs
data refreshed 2 min ago

Minor flooding here begins at 8 ft, with major flooding at 13 ft. The highest crest on record was 12.16 ft on Mon, Mar 28, 2011.

Streamflow outlook

NOAA National Water Model forecast, issued 14 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

Flood stages at this gauge

CategoryStageCurrent distance
Action7 ft3.7 ft below
Minor flood8 ft4.7 ft below
Moderate flood10 ft6.7 ft below
Major flood13 ft9.7 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Highest crests on record

StageDate
12.16 ft2011-03-28
10.88 ft2019-03-29
10.75 ft2009-03-24
10.6 ft2001-04-09
10.52 ft2011-04-04

Nearby gauges

GaugeDistanceCounty
Big Sioux River near Castlewood, SD19.8 miHamlin County
Big Sioux River near Brookings, SD21.0 miMoody County
Battle Creek near Nunda SD21.7 miLake County
Big Sioux River below Watertown, SD27.4 miCodington County
Spring Creek near Flandreau, SD28.0 miMoody County
Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast