Grand River Near Sumner flow report
As of July 13, 2026, Grand River Near Sumner is flowing at 3,080 cfs with a gage height of 11.83 ft, receding 7% over the past 24 hours. Source: USGS gauge #06902000, refreshed throughout the day.
Historical Data
Grand River Near Sumner at a glance
How Grand River Near Sumner is running right now, where it sits on the map, and the key gauge stats.
Grand River Near Sumner is flowing at 3,080 cfs, with the water sitting 11.83 ft at the gage. Flow is down 7% since yesterday as the gauge recedes.
This is USGS gauge #06902000 in Missouri. Over the past 10 days the average has been 1,682 cfs, peaking at 3,320 cfs.
Over the next 5 days, Grand River Near Sumner is expected to recede from today's 3320 cfs, toward roughly 2127 cfs by 2026-07-17 (likely range 471-9600 cfs) -- drier than normal for the date.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Missouri flow report.
Streamflow Forecast
Powered by PULSE — Snoflo’s Predictive Unified Learning & Simulation Engine, which learns from how this river has answered every past storm, snowmelt, and dry spell to forecast where it’s headed with a precision generic models can’t match.
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
Grand River Near Sumner
The river is also impacted by several dams, including the Sumner Dam and the Chillicothe Dam, which can affect the flow rate and water levels. Seasonally, the river experiences high flows in the spring due to snowmelt and precipitation, while low flows are seen in the summer and fall. Interestingly, the Grand River is home to several species of fish, including the paddlefish which can grow up to six feet long and weigh over 100 pounds. Overall, the hydrology of the Grand River near Sumner is influenced by a variety of factors, making it an interesting study for college students in the field of environmental science.
Nearby streamflow levels
Cross-check Grand River Near Sumner's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Grand River Near Sumner | 3,080 cfs |
| Grand River At Chillicothe | 361 cfs |
| Locust Creek Near Linneus | 108 cfs |
| Mussel Fork Near Musselfork | 107 cfs |
| Wakenda Creek At Carrollton | 20 cfs |
| Shoal Creek Near Braymer Mo | 54 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Grand River Near Sumner. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Coloma | 0 in |
| Chillicothe 2s | 0 in |
| Gallatin 1w | 0 in |
| Blue Lick | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Grand River Near Sumner.
River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track Grand River Near Sumner in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Grand River Near Sumner crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Grand River Near Sumner
Where does the streamflow data for Grand River Near Sumner come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 06902000. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when Grand River Near Sumner rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free Grand River Near Sumner report
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