Swan River river
Total streamflow across the Swan River was last observed at 3,740 cfs, and is expected to yield approximately 7,418 acre-ft of water today; about 144% of normal. River levels are high. Average streamflow for this time of year is 2,592 cfs, with recent peaks last observed on 2022-06-22 when daily discharge volume was observed at 7,050 cfs.
Maximum discharge along the river is currently at the Swan River Near Bigfork Mt reporting a streamflow rate of 3,740 cfs. This is also the highest stage along the Swan River, with a gauge stage of 4.86 ft at this location. This river is monitored from 2 different streamgauging stations along the Swan River, the highest being situated at an altitude of 3,081 ft, the Swan River Near Bigfork Mt.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Swan River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Swan River
All 2 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)▾ |
|---|---|---|---|---|---|---|---|
|
Swan River Near Bigfork Mt
MT
USGS 12370000
|
3,740 | 4.86 | 8.0 | 134% | 283 | 8,890 | 3,081 |
|
Swan River At East Patchogue Ny
NY
USGS 01305500
|
12 | 0.51 | 0.0 | 95% | 6 | 31 | 7 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
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
Swan River
The Swan River is a significant river in Western Australia, running approximately 65 kilometers from its source in the Perth Hills to the Indian Ocean. The river is historically significant to the Noongar people, who have occupied the area for thousands of years. The Swan River is also important to the city of Perth, providing drinking water to over 1 million people and supporting agricultural crops such as citrus and grapes. The river has several dams and reservoirs along its length, including the Mundaring Weir and the Walyunga National Park Dam. The river is also a popular recreational area, with activities such as swimming, boating, and fishing. However, the river has faced significant environmental challenges, including pollution and damage to its ecosystem.
Track the Swan 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 Swan River
Where does the data for the Swan 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.