Lemhi River river
Total streamflow across the Lemhi River was last observed at 247 cfs, and is expected to yield approximately 490 acre-ft of water today; about 30% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 834 cfs, with recent peaks last observed on 2017-06-07 when daily discharge volume was observed at 3,390 cfs.
Maximum discharge along the river is currently at the Lemhi River Nr Lemhi Id reporting a streamflow rate of 256 cfs. This is also the highest stage along the Lemhi River, with a gauge stage of 4.14 ft at this location. This river is monitored from 2 different streamgauging stations along the Lemhi River, the highest being situated at an altitude of 4,912 ft, the Lemhi River Nr Lemhi Id.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Lemhi River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Lemhi 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)▾ |
|---|---|---|---|---|---|---|---|
|
Lemhi River Nr Lemhi Id
ID
USGS 13305000
|
256 | 4.14 | 2.5 | 61% | 62 | 1,620 | 4,912 |
|
Lemhi River Below L5 Diversion Near Salmon
ID
USGS 13305310
|
199 | 2.08 | 7.8 | 32% | 1 | 2,060 | 4,180 |
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
Lemhi River
The Lemhi River is a tributary of the Salmon River located in Idaho, USA. It stretches for 60 miles from its source in the Lemhi Range to its confluence with the Salmon River. The hydrology of the Lemhi River is characterized by seasonal fluctuations in flow and high levels of sediment. The river has been the site of several dams and reservoirs, including the North Fork Dam and Reservoir, which was constructed in the 1970s to provide irrigation water for nearby farms. Today, the river is used for agricultural purposes, including irrigation and livestock watering, as well as for recreational activities such as fishing and rafting. The Lemhi River has a rich history, having been explored by Lewis and Clark on their westward expedition in 1805.
Recreation along the Lemhi River
Fishing access and paddle runs Snoflo tracks within the watershed.
Track the Lemhi 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 Lemhi River
Where does the data for the Lemhi 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.