Duwamish River river
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Duwamish River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Duwamish River
All 1 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Duwamish River At Golf Course At Tukwila
WA
USGS 12113390
|
6,700 | 6.37 | 63.8 | 384% | 1 | 9,540 | 16 |
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Duwamish River
The Duwamish River is a 12-mile long river that flows through Seattle, Washington into the Puget Sound. The river has a complex history, having been heavily industrialized in the early 20th century and subsequently becoming polluted. It has since been designated a Superfund site and is undergoing a cleanup effort. The river is fed by several small streams and has two main tributaries, the Green River and the Black River. There are no significant reservoirs or dams on the Duwamish River. Recreational activities on the river are limited due to pollution, but there are several parks along the river that offer hiking and birdwatching opportunities. The Duwamish Valley is also home to a number of urban farms that provide fresh produce to the surrounding communities.
Recreation along the Duwamish River
Fishing access and paddle runs Snoflo tracks within the watershed.
Track the Duwamish River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Duwamish River
Where does the data for the Duwamish River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.