USGS Streamgage 13306385
Napias Creek below Arnett Creek near Leesburg, ID
Napias Creek below Arnett Creek near Leesburg, ID is USGS streamgage 13306385 in Idaho, monitoring river discharge in hydrologic subbasin 17060203. It drains a watershed of about 41 square miles. Discharge records at this site go back to 1991. Typical flow runs near 23.3 cfs in July and 23.8 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
- Idaho
- Drainage area
- 41 sq mi
- Subbasin (HUC-8)
- 17060203
- Coordinates
- 45.20556, -114.13389
- USGS site number
- 13306385
- Records begin
- 1991-08-09 (35 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Napias Creek below Arnett Creek near Leesburg, 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 |
|---|---|---|---|---|
| 14.7 | 15.4 | 16 | ||
| 14 | 14.8 | 15.5 | ||
| 13.6 | 14.5 | 15.2 | ||
| 13.3 | 14.2 | 15 | ||
| 13 | 14 | 14.8 | ||
| 13 | 14 | 15.1 | ||
| 12.8 | 13.9 | 15 | ||
| 12.5 | 13.6 | 14.7 | ||
| 12.2 | 13.4 | 14.5 | ||
| 11.9 | 13.2 | 14.3 | ||
| 11.7 | 13 | 14.1 | ||
| 11.5 | 12.8 | 14 | ||
| 11.3 | 12.7 | 13.9 | ||
| 11.1 | 12.5 | 13.7 |
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 35 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 | 6.2 | 8.4 | 10.5 | |
| February | 6.4 | 8.2 | 9.9 | |
| March | 6.6 | 8.8 | 14.5 | |
| April | 11.5 | 23.8 | 54.7 | |
| May | 49 | 93.6 | 220 | |
| June | 37.6 | 79.2 | 189 | |
| July | 14.3 | 23.3 | 46.5 | |
| August | 8.6 | 12 | 19.3 | |
| September | 7.4 | 10.4 | 14.6 | |
| October | 7.6 | 10.3 | 14.2 | |
| November | 7.5 | 9.7 | 13.1 | |
| December | 6.7 | 8.9 | 11.3 |
All values in cubic feet per second (cfs).
Common questions
- When does Napias Creek below Arnett Creek near Leesburg, ID normally run highest?
- May, on the long-term record. The median daily flow that month is about 93.6 cfs, against 8.2 cfs in February, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Napias Creek below Arnett Creek near Leesburg, ID?
- It depends on the month. In January, half of days historically fall near 8.4 cfs, with the middle 80% of days between 6.2 and 10.5 cfs. The month-by-month table on this page gives the full range.
- How long has Napias Creek below Arnett Creek near Leesburg, ID been measured?
- Discharge records at USGS site 13306385 begin in 1991, about 35 years, covering roughly 9,199 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Napias Creek below Arnett Creek near Leesburg, 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 Napias Creek below Arnett Creek near Leesburg, ID?
- The gauge sits at 45.20556, -114.13389, in Idaho, in hydrologic subbasin 17060203, draining roughly 41 square miles.
- Can I use Napias Creek below Arnett Creek near Leesburg, 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.