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.
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)
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).