USGS Streamgage 06781600
South Loup River at Arnold, Nebr.
South Loup River at Arnold, Nebr. is USGS streamgage 06781600 in Nebraska, monitoring river discharge in hydrologic subbasin 10210004. It sits on the South Loup River, alongside 2 other gauges Rivermatics tracks on the same river. Discharge records at this site go back to 2010. Typical flow runs near 24.7 cfs in July and 39.7 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
- Gauge elevation
- 2,695 ft
- Subbasin (HUC-8)
- 10210004
- Coordinates
- 41.42278, -100.20338
- USGS site number
- 06781600
- Records begin
- 2010-04-28 (16 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for South Loup River at Arnold, 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 |
|---|---|---|---|---|
| 15.2 | 16.2 | 17.5 | ||
| 14 | 15.7 | 17.9 | ||
| 13.2 | 15.3 | 18.4 | ||
| 12.7 | 15.3 | 19.8 | ||
| 12.3 | 15.4 | 21 | ||
| 12.4 | 15.7 | 22.6 | ||
| 16.7 | 37.3 | 236 | ||
| 16.9 | 41.1 | 149 | ||
| 16.1 | 35.4 | 101 | ||
| 14.6 | 27.9 | 68 | ||
| 14.1 | 25.1 | 55.1 | ||
| 13.5 | 23.1 | 47 | ||
| 13.1 | 21.5 | 41.3 | ||
| 12.9 | 21.8 | 42.6 |
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 16 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 | 21.2 | 29.4 | 46.7 | |
| February | 25.5 | 37.1 | 62.1 | |
| March | 29.6 | 42.3 | 104.9 | |
| April | 25.1 | 39.7 | 70.3 | |
| May | 23.7 | 42.1 | 98.6 | |
| June | 18.8 | 34.3 | 109.6 | |
| July | 13.4 | 24.7 | 55.2 | |
| August | 12.5 | 21.7 | 58.2 | |
| September | 12.9 | 19.5 | 33.9 | |
| October | 18.1 | 24.5 | 41.6 | |
| November | 21.7 | 28.1 | 35.8 | |
| December | 21.2 | 29.5 | 42.9 |
All values in cubic feet per second (cfs).
Common questions
- When does South Loup River at Arnold, Nebr. normally run highest?
- March, on the long-term record. The median daily flow that month is about 42.3 cfs, against 19.5 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 South Loup River at Arnold, Nebr.?
- It depends on the month. In January, half of days historically fall near 29.4 cfs, with the middle 80% of days between 21.2 and 46.7 cfs. The month-by-month table on this page gives the full range.
- How long has South Loup River at Arnold, Nebr. been measured?
- Discharge records at USGS site 06781600 begin in 2010, about 16 years, covering roughly 5,944 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for South Loup River at Arnold, 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 South Loup River at Arnold, Nebr.?
- The gauge sits at 41.42278, -100.20338, in Nebraska, in hydrologic subbasin 10210004, at an elevation of about 2,695 feet.
- Can I use South Loup River at Arnold, 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.
Upstream and downstream on the South Loup River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the South Loup River in full.
- South Loup River at Pressey WMA near Oconto, Nebr. 834 sq mi
- South Loup River at Saint Michael, Nebr. 2,320 sq mi
- South Loup River at Arnold, Nebr. this page