6 USGS Streamgages · Mississippi River system
Osage River flows and levels
Osage River is gauged at 6 USGS streamgages in Missouri, each tracked by Rivermatics. The mainstem runs about 510 miles (821 km) from headwaters to outlet. It drains into the Mississippi River system. Drainage area at the gauges ranges from 5,410 square miles at Osage River above Schell City, MO up to 14,584 at Osage River below St. Thomas, MO. The gauged reach falls about 170 feet, from 707 feet down to 538. Rivermatics issues a daily machine-learned 14-day flow outlook at 4 of them.
Gauges on this river, upstream to downstream
Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.
| Gauge | State | Drainage sq mi | Elevation ft | April p50 cfs | July p50 cfs | Forecast |
|---|---|---|---|---|---|---|
| Osage River above Schell City, MO | MO | 5,410 | 706 | 3,486.7 | 1,794 | — |
| Osage River at Taberville, MO | MO | 5,670 | 707 | 3,383.3 | 883.5 | 14-day |
| Osage River at Warsaw, MO | MO | 11,500 | 674 | 13,076.7 | 1,953.5 | — |
| Osage River near Bagnell, MO | MO | 14,000 | 576 | 10,141.7 | 3,853.2 | 14-day |
| Osage River at Tuscumbia, MO | MO | 14,070 | 572 | 13,693.7 | 9,551.9 | 14-day + temp |
| Osage River below St. Thomas, MO | MO | 14,584 | 538 | 12,190.7 | 7,693.2 | 14-day |
Typical flow by month at Osage River below St. Thomas, MO
The furthest-downstream gauge on this river, so the fullest flow it carries here. Long-term daily discharge percentiles from the USGS record (up to 30 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 959.7 | 4,634.5 | 32,916.1 | |
| February | 1,956.1 | 8,331.7 | 29,300 | |
| March | 1,912.6 | 9,184.5 | 35,219.4 | |
| April | 1,688.1 | 12,190.7 | 37,326.7 | |
| May | 1,501 | 24,793.5 | 48,764.5 | |
| June | 1,590.4 | 25,370 | 39,333.3 | |
| July | 1,340.7 | 7,693.2 | 45,422.6 | |
| August | 1,052.2 | 3,201 | 24,574.2 | |
| September | 955.5 | 2,029.7 | 21,830 | |
| October | 773.7 | 1,747.4 | 20,764.5 | |
| November | 632 | 1,450.3 | 25,840 | |
| December | 805 | 1,963.9 | 20,716.1 |
All values in cubic feet per second (cfs).
Common questions
- When does the Osage River run highest?
- June, on the long-term record at Osage River below St. Thomas, MO — the furthest-downstream gauge Rivermatics tracks on this river. Median daily flow there is about 25,370 cfs that month, against 1,450.3 cfs in November, the lowest. Upstream gauges peak on their own schedule; the table on this page gives April and July for each.
- How many gauges are on the Osage River?
- Rivermatics tracks 6 USGS streamgages on the Osage River, across Missouri. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
- Is there a flow forecast for the Osage River?
- Yes, at 4 of the 6 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on each gauge's live screen.
- What river system is the Osage River part of?
- The Osage River drains into the Mississippi River system — it is a tributary somewhere in that chain, following the flowpath down to its terminal river. Rivermatics builds this from the USGS/geoconnex reference-mainstem network rather than from names.
- Can I use Osage River data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Other rivers in the Mississippi River system
- Missouri River 52 gauges
- Big Sioux River 17 gauges
- James River 15 gauges
- Kansas River 12 gauges
- Smoky Hill River 12 gauges
- Platte River 11 gauges
- Rapid Creek 11 gauges
- Republican River 11 gauges