USGS Streamgage 06463720
Niobrara River at Mariaville, Nebr.
Niobrara River at Mariaville, Nebr. is USGS streamgage 06463720 in Nebraska, monitoring river discharge in hydrologic subbasin 10150004. It drains a watershed of about 9,810 square miles. Discharge records at this site go back to 1986. Typical flow runs near 1,242.9 cfs in July and 1,813.7 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
Gauge details
- State
- Nebraska
- Drainage area
- 9,810 sq mi
- Gauge elevation
- 1,807 ft
- Subbasin (HUC-8)
- 10150004
- Coordinates
- 42.78141, -99.33471
- USGS site number
- 06463720
- Records begin
- 1986-02-28 (40 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Niobrara River at Mariaville, Nebr.. 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 |
|---|---|---|---|---|
| 1,200 | 1,232 | 1,263 | ||
| 1,175 | 1,222 | 1,281 | ||
| 1,168 | 1,226 | 1,310 | ||
| 1,194 | 1,311 | 1,694 | ||
| 1,210 | 1,383 | 1,900 | ||
| 1,213 | 1,378 | 1,814 | ||
| 1,241 | 1,434 | 1,851 | ||
| 1,294 | 1,589 | 2,292 | ||
| 1,305 | 1,647 | 2,477 | ||
| 1,290 | 1,591 | 2,253 | ||
| 1,256 | 1,508 | 2,015 | ||
| 1,221 | 1,433 | 1,819 | ||
| 1,197 | 1,396 | 1,744 | ||
| 1,172 | 1,358 | 1,675 |
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 14 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 | 1,042.4 | 1,409.4 | 2,100 | |
| February | 1,042.6 | 1,541 | 2,415 | |
| March | 1,252 | 1,851 | 3,806.5 | |
| April | 1,299.3 | 1,813.7 | 2,564.3 | |
| May | 1,392.3 | 1,771.9 | 3,274.8 | |
| June | 1,011.1 | 1,556 | 2,478.3 | |
| July | 763.8 | 1,242.9 | 1,994.5 | |
| August | 755.1 | 1,136.1 | 1,805.2 | |
| September | 788.3 | 1,119 | 2,206 | |
| October | 835.3 | 1,301.9 | 2,074.2 | |
| November | 1,048.9 | 1,435.3 | 2,028.7 | |
| December | 911.1 | 1,508.7 | 2,180.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Niobrara River at Mariaville, Nebr. normally run highest?
- March, on the long-term record. The median daily flow that month is about 1,851 cfs, against 1,119 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Niobrara River at Mariaville, Nebr.?
- It depends on the month. In January, half of days historically fall near 1,409.4 cfs, with the middle 80% of days between 1,042.4 and 2,100 cfs. The month-by-month table on this page gives the full range.
- How long has Niobrara River at Mariaville, Nebr. been measured?
- Discharge records at USGS site 06463720 begin in 1986, about 40 years, covering roughly 5,050 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Niobrara River at Mariaville, Nebr.?
- 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 Niobrara River at Mariaville, Nebr.?
- The gauge sits at 42.78141, -99.33471, in Nebraska, in hydrologic subbasin 10150004, at an elevation of about 1,807 feet, draining roughly 9,810 square miles.
- Can I use Niobrara River at Mariaville, Nebr. 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.