USGS Streamgage 13210831
South Middleton Drain at Middleton, ID
South Middleton Drain at Middleton, ID is USGS streamgage 13210831 in Idaho, monitoring river discharge in hydrologic subbasin 17050114. It drains a watershed of about 5 square miles. Discharge records at this site go back to 2016. Typical flow runs near 68.4 cfs in July and 29.8 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
- Idaho
- Drainage area
- 5 sq mi
- Subbasin (HUC-8)
- 17050114
- Coordinates
- 43.70211, -116.61819
- USGS site number
- 13210831
- Records begin
- 2016-11-22 (10 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for South Middleton Drain at Middleton, ID. 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 |
|---|---|---|---|---|
| 45.5 | 49.5 | 54.2 | ||
| 43.2 | 49.7 | 57.4 | ||
| 40.8 | 48.7 | 57.9 | ||
| 38.5 | 48 | 58.6 | ||
| 37.5 | 47.8 | 59.7 | ||
| 37.2 | 48.7 | 62.9 | ||
| 35.4 | 48.1 | 63.7 | ||
| 33.7 | 48.2 | 67 | ||
| 34.4 | 49.9 | 71.2 | ||
| 33.2 | 49.9 | 72.9 | ||
| 33.5 | 50.7 | 74 | ||
| 33.1 | 50.1 | 72.5 | ||
| 31.8 | 49.6 | 72.4 | ||
| 29.7 | 48.2 | 71.1 |
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 10 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 | 10.4 | 19 | 30.5 | |
| February | 12.5 | 20.4 | 44.6 | |
| March | 12.9 | 20.3 | 36.4 | |
| April | 19.7 | 29.8 | 66.9 | |
| May | 32.3 | 49.8 | 93.6 | |
| June | 36.3 | 65.6 | 101.6 | |
| July | 50.9 | 68.4 | 89 | |
| August | 43.2 | 69.1 | 86.7 | |
| September | 29.6 | 72.9 | 102.4 | |
| October | 35.7 | 50.3 | 70.7 | |
| November | 11 | 19.6 | 27.8 | |
| December | 8.5 | 18 | 26.2 |
All values in cubic feet per second (cfs).
Common questions
- When does South Middleton Drain at Middleton, ID normally run highest?
- September, on the long-term record. The median daily flow that month is about 72.9 cfs, against 18 cfs in December, 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 Middleton Drain at Middleton, ID?
- It depends on the month. In January, half of days historically fall near 19 cfs, with the middle 80% of days between 10.4 and 30.5 cfs. The month-by-month table on this page gives the full range.
- How long has South Middleton Drain at Middleton, ID been measured?
- Discharge records at USGS site 13210831 begin in 2016, about 10 years, covering roughly 3,545 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 Middleton Drain at Middleton, ID?
- 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 Middleton Drain at Middleton, ID?
- The gauge sits at 43.70211, -116.61819, in Idaho, in hydrologic subbasin 17050114, draining roughly 5 square miles.
- Can I use South Middleton Drain at Middleton, ID 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.