River Report

Snake River river

27 streamgauges 66% of normal Last updated 2026-05-29

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Aggregate flow

243,269cfs

% of normal

66%

Daily volume

482,518AF

Seasonal avg

369,792cfs

Total streamflow across the Snake River was last observed at 243,269 cfs, and is expected to yield approximately 482,518 acre-ft of water today; about 66% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 369,792 cfs, with recent peaks last observed on 2011-05-27 when daily discharge volume was observed at 763,301 cfs.

Maximum discharge along the river is currently at the Snake River Near Anatone reporting a streamflow rate of 49,100 cfs. However, the streamgauge with the highest stage along the river is the Snake River At Hells Canyon Dam Id-Or State Line with a gauge stage of 68.09 ft. This river is monitored from 27 different streamgauging stations along the Snake River, the highest being situated at an altitude of 9,326 ft, the Snake River Near Montezuma.

Max discharge

Snake River Near Anatone

49,100cfs

Highest stage

Snake River At Hells Canyon Dam Id-Or State Line

68.09ft

Highest-elevation gauge

Snake River Near Montezuma

9,326ft

Aggregate trend

River streamflow levels

Daily aggregate streamflow across every monitored gauge along the Snake River. Use the range buttons to zoom in on a specific period.

Total streamflow

Sum of all monitored streamgauges · daily

Premium feature

Decades of basin-wide flow context for the Snake River.

See exactly how the Snake River is performing — which gauges are stressed right now, and how this season ranks against every year on record.

Longitudinal river profile — gauges from headwaters to mouth, colored by % of normal
Flow percentile bands — this season vs. the historical envelope across every year on record

Unlock historical context 7-day free trial · cancel anytime

Longitudinal profile

Where on the river is flow stressed right now?

Every monitored gauge along the Snake River ordered headwaters → mouth (by elevation), with bars colored by current percent of normal. Red reaches are below normal; blue reaches are above. Spot drought-stressed sections at a glance.

Gauges from headwaters to mouth

Bar = current % of normal · ordered top-to-bottom by elevation

Flow percentile bands

How does this season compare to normal?

The shaded ribbon shows the 10th-90th percentile of aggregate river discharge across every year on record — the "normal range." The bold line is the current year. Above the dark band means above-normal flow; below means drier-than-normal.

Aggregate flow percentile envelope

10th · 25th · 50th · 75th · 90th percentile across all historical years

Per-gauge breakdown

Every streamgauge along the Snake River

All 27 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)▾
Snake River Near Montezuma CO USGS 09047500	121	1.87	10.5	86%	6	945	9,326
Snake River Ab Jackson Lake At Flagg Ranch Wy WY USGS 13010065	3,070	5.46	11.2	111%	67	10,700	6,818
Snake River Nr Moran Wy WY USGS 13011000	4,010	6.60	-0.3	124%	201	8,170	6,732
Snake River At Moose WY USGS 13013650	8,160	12.09	6.6	108%	575	15,800	6,443
Snake River Bl Flat Creek Nr Jackson Wy WY USGS 13018750	10,100	5.70	7.4	107%	941	29,500	5,930
Snake River Ab Reservoir Nr Alpine Wy WY USGS 13022500	13,200	7.59	10.9	104%	929	30,400	5,696
Snake River Nr Irwin Id ID USGS 13032500	13,100	9.05	-2.2	117%	660	39,400	5,369
Snake River Nr Heise Id ID USGS 13037500	13,400	6.08	-0.7	110%	1,090	25,700	5,052
Snake River At Lorenzo Id ID USGS 13038500	6,670	7.22	-1.2	108%	434	21,200	4,848
Snake River Nr Menan Id ID USGS 13057000	7,950	4.71	1.5	78%	1,630	30,100	4,789
Snake River Ab Eagle Rock Nr Idaho Falls Id ID USGS 13057155	6,590	8.07	1.7	65%	1,720	31,600	4,740
Snake River Nr Shelley Id ID USGS 13060000	6,700	7.20	3.5	69%	1,080	32,000	4,607
Snake River At Blackfoot Id ID USGS 13062500	3,530	5.73	3.6	50%	206	31,600	4,477
Snake River Nr Blackfoot Id ID USGS 13069500	3,220	3.55	4.7	45%	436	28,400	4,419
Snake River At Neeley Id ID USGS 13077000	10,200	5.92	1.0	97%	235	29,100	4,244
Snake R Nr Minidoka Id (At Howells Ferry) ID USGS 13081500	7,530	6.82	0.0	88%	309	27,600	4,133
Snake River Gaging Station At Milner Id ID USGS 13087995	·	0.98	·	0%	0	16,400	4,068
Snake River Nr Twin Falls Id ID USGS 13090500	423	1.67	6.2	23%	236	23,300	3,124
Snake River Nr Buhl Id ID USGS 13094000	1,540	0.92	-3.8	47%	1,180	24,200	2,960
Snake River At King Hill Id ID USGS 13154500	6,580	5.73	-0.5	75%	4,880	30,600	2,503
Snake River Nr Murphy Id ID USGS 13172500	5,250	24.86	11.9	55%	4,180	30,300	2,273
Snake River At Nyssa Or ID USGS 13213100	7,990	5.48	2.4	66%	4,300	46,200	2,165
Snake River At Weiser Id ID USGS 13269000	14,000	4.12	1.5	79%	5,330	71,000	2,092
Snake River At Hells Canyon Dam Id-Or State Line OR USGS 13290450	19,200	68.09	15.9	136%	6,190	103,000	1,471
Snake River Near Pine City MN USGS 05338500	341	3.27	-3.0	24%	36	12,000	922
Snake River Bl Mcduff Rapids At China Gardens ID USGS 13317660	45,500	12.31	10.3	65%	10,500	131,000	858
Snake River Near Anatone WA USGS 13334300	49,100	9.31	9.7	60%	10,700	147,000	813

Annual peaks

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

Profile

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

About this river

Snake River

The Snake River is a major river in the United States, stretching over 1,000 miles from Wyoming to Washington, and is a tributary of the Columbia River. The river has a storied history, serving as a vital transportation route for Native Americans and later European settlers. Today, the river is heavily utilized for hydroelectric power, with several large dams and reservoirs along its length, such as the Hells Canyon Dam and the Jackson Lake Dam. These dams have transformed the river into a major source of energy for the region, but have also had significant impacts on the river's ecology and the surrounding landscapes. Additionally, the Snake River and its reservoirs are popular recreational destinations, offering activities such as fishing, boating, and camping. The river also plays a critical role in the region's agricultural sector, providing irrigation for crops and supporting the livelihoods of many farmers and ranchers.

Track the Snake 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.

 Get the app

FAQ

About the Snake River

Where does the data for the Snake 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.