USGS Streamgage 06813000
Tarkio River at Fairfax, MO
Tarkio River at Fairfax, MO is USGS streamgage 06813000 in Missouri, monitoring river discharge in hydrologic subbasin 10240005. It sits on the Tarkio River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 508 square miles. Discharge records at this site go back to 1922. Typical flow runs near 127.2 cfs in July and 125.5 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
Gauge details
- State
- Missouri
- Drainage area
- 508 sq mi
- Gauge elevation
- 898 ft
- Subbasin (HUC-8)
- 10240005
- Coordinates
- 40.33942, -95.40683
- USGS site number
- 06813000
- Records begin
- 1922-03-08 (104 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Tarkio River at Fairfax, MO. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 34.5 | 40.5 | 48.1 | ||
| 29.4 | 36.3 | 46.8 | ||
| 28.6 | 37.4 | 60.6 | ||
| 29.1 | 42.9 | 134 | ||
| 31.7 | 55.9 | 301 | ||
| 38.9 | 86.4 | 505 | ||
| 37.7 | 98.2 | 552 | ||
| 37.8 | 91.4 | 390 | ||
| 35.7 | 85.5 | 331 | ||
| 33.6 | 73.7 | 251 | ||
| 30.4 | 60.5 | 180 | ||
| 27.3 | 51.9 | 165 | ||
| 25.8 | 46.6 | 135 | ||
| 25.5 | 44.1 | 105 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 104 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 | 7.7 | 52.7 | 278.6 | |
| February | 14.4 | 84.4 | 454.9 | |
| March | 24.6 | 123.9 | 689 | |
| April | 19 | 125.5 | 622 | |
| May | 16.1 | 161.5 | 903.9 | |
| June | 17.4 | 206.7 | 1,218.4 | |
| July | 9.9 | 127.2 | 576.5 | |
| August | 6.6 | 67.5 | 358.1 | |
| September | 7 | 47.2 | 394.8 | |
| October | 7.4 | 46 | 374.6 | |
| November | 12 | 56.9 | 275.3 | |
| December | 10.2 | 53.7 | 265 |
All values in cubic feet per second (cfs).
Common questions
- When does Tarkio River at Fairfax, MO normally run highest?
- June, on the long-term record. The median daily flow that month is about 206.7 cfs, against 46 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Tarkio River at Fairfax, MO?
- It depends on the month. In January, half of days historically fall near 52.7 cfs, with the middle 80% of days between 7.7 and 278.6 cfs. The month-by-month table on this page gives the full range.
- How long has Tarkio River at Fairfax, MO been measured?
- Discharge records at USGS site 06813000 begin in 1922, about 104 years, covering roughly 6,978 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Tarkio River at Fairfax, MO?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow 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 the live gauge screen. Open live conditions to see the current outlook.
- Where is Tarkio River at Fairfax, MO?
- The gauge sits at 40.33942, -95.40683, in Missouri, in hydrologic subbasin 10240005, at an elevation of about 898 feet, draining roughly 508 square miles.
- Can I use Tarkio River at Fairfax, MO 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.
Upstream and downstream on the Tarkio River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Tarkio River in full.
- Tarkio River near Elliott, IA 11 sq mi
- Tarkio River at Fairfax, MO this page