USGS Streamgage 11399500
NF Feather River near Prattville, CA
NF Feather River near Prattville, CA is USGS streamgage 11399500 in California, monitoring river discharge in hydrologic subbasin 18020121. It drains a watershed of about 493 square miles. Discharge records at this site go back to 1906. Typical flow runs near 42.1 cfs in July and 37.9 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- California
- Drainage area
- 493 sq mi
- Gauge elevation
- 4,390 ft
- Subbasin (HUC-8)
- 18020121
- Coordinates
- 40.16822, -121.09302
- USGS site number
- 11399500
- Records begin
- 1906-01-01 (120 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 120 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 | 10.2 | 38.3 | 909.8 | |
| February | 10.5 | 38.8 | 971.1 | |
| March | 10.1 | 38.4 | 1,079.3 | |
| April | 10.2 | 37.9 | 1,457 | |
| May | 19.9 | 39 | 1,524.2 | |
| June | 25.3 | 39 | 1,093 | |
| July | 34.3 | 42.1 | 1,068 | |
| August | 34.8 | 43.4 | 1,137.7 | |
| September | 33.7 | 41.8 | 1,070.2 | |
| October | 26.4 | 39.4 | 1,032.9 | |
| November | 10.3 | 38.5 | 959.3 | |
| December | 9.7 | 37.9 | 938.8 |
All values in cubic feet per second (cfs).
Common questions
- When does NF Feather River near Prattville, CA normally run highest?
- August, on the long-term record. The median daily flow that month is about 43.4 cfs, against 37.9 cfs in April, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for NF Feather River near Prattville, CA?
- It depends on the month. In January, half of days historically fall near 38.3 cfs, with the middle 80% of days between 10.2 and 909.8 cfs. The month-by-month table on this page gives the full range.
- How long has NF Feather River near Prattville, CA been measured?
- Discharge records at USGS site 11399500 begin in 1906, about 120 years, covering roughly 8,821 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is NF Feather River near Prattville, CA?
- The gauge sits at 40.16822, -121.09302, in California, in hydrologic subbasin 18020121, at an elevation of about 4,390 feet, draining roughly 493 square miles.
- Can I use NF Feather River near Prattville, CA 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.
Other gauges in this subbasin
- Butt C below Almanor-Butt C Tu near Prattville, CA
- NF Feather River below Belden Dam, CA
- NF Feather River below Rock C Diversion Dam, CA
- Grizzly C below Diversion Dam, CA
- NF Feather River below Grizzly C, CA
- NF Feather River A Pulga, CA
- Philbrook C below Philbrook Dam near Butte Meadows, CA
- Wb Feather River below Hendricks Diversion Dam, CA