USGS Streamgage 06815000
Big Nemaha River at Falls City, Nebr.
Big Nemaha River at Falls City, Nebr. is USGS streamgage 06815000 in Nebraska, monitoring river discharge in hydrologic subbasin 10240008. It drains a watershed of about 1,339 square miles. Discharge records at this site go back to 1941. Typical flow runs near 203.5 cfs in July and 256.3 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.
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Gauge details
- State
- Nebraska
- Drainage area
- 1,339 sq mi
- Gauge elevation
- 900 ft
- Subbasin (HUC-8)
- 10240008
- Coordinates
- 40.03552, -95.59576
- USGS site number
- 06815000
- Records begin
- 1941-06-10 (85 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Big Nemaha River at Falls City, 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 |
|---|---|---|---|---|
| 50 | 63.8 | 90.3 | ||
| 42 | 58.4 | 94.4 | ||
| 41.4 | 60.7 | 123 | ||
| 41.4 | 68.2 | 253 | ||
| 44.3 | 85.7 | 568 | ||
| 53.9 | 116 | 626 | ||
| 53 | 126 | 626 | ||
| 53.6 | 131 | 508 | ||
| 49 | 122 | 544 | ||
| 46.2 | 109 | 451 | ||
| 43.5 | 94.2 | 312 | ||
| 42 | 85.6 | 296 | ||
| 39.3 | 77.1 | 287 | ||
| 38.6 | 74.7 | 234 |
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 82 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 | 45.8 | 112.2 | 416.5 | |
| February | 58.6 | 163.6 | 750.4 | |
| March | 63.3 | 225.5 | 1,643.5 | |
| April | 68.2 | 256.3 | 1,606.9 | |
| May | 67.8 | 354.9 | 2,703.9 | |
| June | 62.8 | 341.4 | 2,655.7 | |
| July | 40.2 | 203.5 | 1,441.5 | |
| August | 27.5 | 128.6 | 757 | |
| September | 25.1 | 102.2 | 899.2 | |
| October | 30.4 | 99.7 | 672.6 | |
| November | 42.7 | 117.2 | 409.6 | |
| December | 42.8 | 111.1 | 349.9 |
All values in cubic feet per second (cfs).
Common questions
- When does Big Nemaha River at Falls City, Nebr. normally run highest?
- May, on the long-term record. The median daily flow that month is about 354.9 cfs, against 99.7 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 Big Nemaha River at Falls City, Nebr.?
- It depends on the month. In January, half of days historically fall near 112.2 cfs, with the middle 80% of days between 45.8 and 416.5 cfs. The month-by-month table on this page gives the full range.
- How long has Big Nemaha River at Falls City, Nebr. been measured?
- Discharge records at USGS site 06815000 begin in 1941, about 85 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Big Nemaha River at Falls City, 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 Big Nemaha River at Falls City, Nebr.?
- The gauge sits at 40.03552, -95.59576, in Nebraska, in hydrologic subbasin 10240008, at an elevation of about 900 feet, draining roughly 1,339 square miles.
- Can I use Big Nemaha River at Falls City, 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.