USGS Streamgage 13302005
Pahsimeroi River at Ellis, ID
Pahsimeroi River at Ellis, ID is USGS streamgage 13302005 in Idaho, monitoring river discharge in hydrologic subbasin 17060202. It drains a watershed of about 830 square miles. Discharge records at this site go back to 1984. Typical flow runs near 150.1 cfs in July and 220.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 830 sq mi
- Subbasin (HUC-8)
- 17060202
- Coordinates
- 44.69167, -114.04694
- USGS site number
- 13302005
- Records begin
- 1984-10-01 (42 years)
14-day flow forecast
Based on observations through for Pahsimeroi River at Ellis, 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 |
|---|---|---|---|---|
| 127 | 130 | 133 | ||
| 126 | 131 | 136 | ||
| 124 | 131 | 139 | ||
| 123 | 131 | 140 | ||
| 122 | 131 | 142 | ||
| 121 | 132 | 144 | ||
| 120 | 132 | 145 | ||
| 120 | 132 | 147 | ||
| 120 | 133 | 150 | ||
| 120 | 133 | 151 | ||
| 120 | 134 | 153 | ||
| 119 | 134 | 153 | ||
| 119 | 135 | 156 | ||
| 119 | 135 | 157 |
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 42 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 | 204 | 252.6 | 330.4 | |
| February | 208.2 | 267.9 | 332.6 | |
| March | 220.4 | 271.5 | 337.3 | |
| April | 169.1 | 220.9 | 292.1 | |
| May | 110.3 | 145.1 | 226.8 | |
| June | 122.4 | 178.6 | 353.1 | |
| July | 113 | 150.1 | 245.5 | |
| August | 115.6 | 139.7 | 192.7 | |
| September | 133.9 | 170.3 | 236.8 | |
| October | 195.7 | 254.2 | 336.3 | |
| November | 221.3 | 283.6 | 355.4 | |
| December | 215.3 | 263.9 | 341.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Pahsimeroi River at Ellis, ID normally run highest?
- November, on the long-term record. The median daily flow that month is about 283.6 cfs, against 139.7 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Pahsimeroi River at Ellis, ID?
- It depends on the month. In January, half of days historically fall near 252.6 cfs, with the middle 80% of days between 204 and 330.4 cfs. The month-by-month table on this page gives the full range.
- How long has Pahsimeroi River at Ellis, ID been measured?
- Discharge records at USGS site 13302005 begin in 1984, about 42 years, covering roughly 9,193 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Pahsimeroi River at Ellis, ID?
- The gauge sits at 44.69167, -114.04694, in Idaho, in hydrologic subbasin 17060202, draining roughly 830 square miles.
- Can I use Pahsimeroi River at Ellis, 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.