Grand River river
Total streamflow across the Grand River was last observed at 73,065 cfs, and is expected to yield approximately 144,923 acre-ft of water today; about 368% of normal. River levels are high. Average streamflow for this time of year is 19,833 cfs, with recent peaks last observed on 2017-04-07 when daily discharge volume was observed at 240,121 cfs.
Maximum discharge along the river is currently at the Grand River Near Sumner reporting a streamflow rate of 51,000 cfs. This is also the highest stage along the Grand River, with a gauge stage of 35.74 ft at this location. This river is monitored from 12 different streamgauging stations along the Grand River, the highest being situated at an altitude of 10,170 ft, the Grand River Ditch At La Poudre Pass.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Grand River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Grand River
All 12 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)▾ |
|---|---|---|---|---|---|---|---|
|
Grand River Ditch At La Poudre Pass
CO
USGS 09010000
|
107 | 1.68 | -7.8 | 83% | 0 | 288 | 10,170 |
|
Grand R At Little Eagle Sd
SD
USGS 06357800
|
74 | 2.80 | -16.4 | 61% | 0 | 14,400 | 1,640 |
|
Grand River At Jackson
MI
USGS 04109000
|
80 | 9.16 | 5.6 | 69% | 24 | 835 | 911 |
|
Grand River Near Eaton Rapids
MI
USGS 04111000
|
1,400 | 4.79 | 10.2 | 154% | 84 | 3,860 | 855 |
|
Grand River At Lansing
MI
USGS 04113000
|
929 | 3.79 | -8.9 | 104% | 69 | 10,200 | 808 |
|
Grand River Near Gallatin
MO
USGS 06897500
|
12,700 | 19.50 | -21.6 | 2509% | 3 | 73,700 | 740 |
|
Grand River At Portland
MI
USGS 04114000
|
1,370 | 6.46 | 1.5 | 130% | 136 | 10,800 | 719 |
|
Grand River At Chillicothe
MO
USGS 06899680
|
361 | 6.97 | · | · | · | · | 686 |
|
Grand River Near Sumner
MO
USGS 06902000
|
51,000 | 35.74 | -19.6 | 1847% | 13 | 127,000 | 636 |
|
Grand River At Ionia
MI
USGS 04116000
|
2,210 | 10.63 | 5.2 | 110% | 277 | 24,600 | 620 |
|
Grand River Near Painesville Oh
OH
USGS 04212100
|
169 | 2.35 | 137.0 | 85% | 12 | 16,700 | 596 |
|
Grand River At Grand Rapids
MI
USGS 04119000
|
4,580 | 4.70 | 22.8 | 121% | 590 | 34,900 | 587 |
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
Grand River
The Grand River is a 300-kilometer long river that runs through southern Ontario, Canada. It was an important waterway for Indigenous peoples and European explorers and was later used for transportation and industry. The river originates in the highlands of Dufferin County and flows into Lake Erie at Port Maitland. The river’s hydrology is affected by numerous tributaries and reservoirs, including the Conestogo, Speed, and Eramosa rivers, and the Elora and Guelph Lake reservoirs. There are also several dams along the river, including the Shand Dam and the Guelph Lake Dam. The Grand River is used for water supply, flood control, and hydroelectric power generation. It is also a popular destination for recreational activities such as fishing, boating, and camping. The river is also home to several agricultural operations, including dairy farms and crop production.
Track the Grand 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 Grand River
Where does the data for the Grand 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.