USGS Streamgage 13342450
Lapwai Creek near Lapwai, ID
Lapwai Creek near Lapwai, ID is USGS streamgage 13342450 in Idaho, monitoring river discharge in hydrologic subbasin 17060306. It drains a watershed of about 264 square miles. Discharge records at this site go back to 1974. Typical flow runs near 10.5 cfs in July and 166.6 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 264 sq mi
- Subbasin (HUC-8)
- 17060306
- Coordinates
- 46.42639, -116.80611
- USGS site number
- 13342450
- Records begin
- 1974-10-01 (52 years)
14-day flow forecast
Based on observations through for Lapwai Creek near Lapwai, 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 |
|---|---|---|---|---|
| 8.4 | 8.8 | 9.4 | ||
| 8.2 | 8.7 | 9.3 | ||
| 8.4 | 9.1 | 11 | ||
| 8.3 | 9.1 | 11.3 | ||
| 8 | 8.9 | 10.3 | ||
| 7.9 | 8.8 | 10.1 | ||
| 7.7 | 8.6 | 9.8 | ||
| 7.6 | 8.6 | 9.8 | ||
| 7.5 | 8.5 | 9.7 | ||
| 7.4 | 8.5 | 9.6 | ||
| 7.3 | 8.5 | 9.7 | ||
| 7.2 | 8.4 | 9.6 | ||
| 7.1 | 8.4 | 9.6 | ||
| 7.1 | 8.4 | 9.7 |
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 52 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 | 17.2 | 36.1 | 181.9 | |
| February | 24.9 | 69 | 258.7 | |
| March | 47.8 | 156 | 452.3 | |
| April | 54.4 | 166.6 | 511.9 | |
| May | 25.5 | 80.4 | 319.6 | |
| June | 11.9 | 32.1 | 127 | |
| July | 3.5 | 10.5 | 26.8 | |
| August | 2 | 7 | 14.1 | |
| September | 3.1 | 8.4 | 16.4 | |
| October | 6 | 13.2 | 24.5 | |
| November | 10.8 | 18.8 | 39.7 | |
| December | 13.6 | 27.1 | 88.4 |
All values in cubic feet per second (cfs).
Common questions
- When does Lapwai Creek near Lapwai, ID normally run highest?
- April, on the long-term record. The median daily flow that month is about 166.6 cfs, against 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 Lapwai Creek near Lapwai, ID?
- It depends on the month. In January, half of days historically fall near 36.1 cfs, with the middle 80% of days between 17.2 and 181.9 cfs. The month-by-month table on this page gives the full range.
- How long has Lapwai Creek near Lapwai, ID been measured?
- Discharge records at USGS site 13342450 begin in 1974, about 52 years, covering roughly 8,335 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Lapwai Creek near Lapwai, ID?
- The gauge sits at 46.42639, -116.80611, in Idaho, in hydrologic subbasin 17060306, draining roughly 264 square miles.
- Can I use Lapwai Creek near Lapwai, 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.