USGS Streamgage 11468500
Noyo River near Fort Bragg, CA
Noyo River near Fort Bragg, CA is USGS streamgage 11468500 in California, monitoring river discharge in hydrologic subbasin 18010108. It drains a watershed of about 106 square miles. Discharge records at this site go back to 1951. Typical flow runs near 12.3 cfs in July and 110.5 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 106 sq mi
- Gauge elevation
- 14 ft
- Subbasin (HUC-8)
- 18010108
- Coordinates
- 39.42818, -123.73777
- USGS site number
- 11468500
- Records begin
- 1951-10-01 (75 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 75 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 | 29.3 | 207.9 | 1,558.6 | |
| February | 47.6 | 239 | 1,405.2 | |
| March | 56.1 | 223.1 | 1,018.5 | |
| April | 37.9 | 110.5 | 473.1 | |
| May | 22.3 | 49.6 | 134.5 | |
| June | 12.2 | 25.2 | 60.4 | |
| July | 5.6 | 12.3 | 25.4 | |
| August | 3 | 6.4 | 13.1 | |
| September | 2.2 | 4.9 | 10.1 | |
| October | 2.9 | 6.4 | 26.1 | |
| November | 6.4 | 18.8 | 239.7 | |
| December | 12.4 | 99 | 1,072.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Noyo River near Fort Bragg, CA normally run highest?
- February, on the long-term record. The median daily flow that month is about 239 cfs, against 4.9 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Noyo River near Fort Bragg, CA?
- It depends on the month. In January, half of days historically fall near 207.9 cfs, with the middle 80% of days between 29.3 and 1,558.6 cfs. The month-by-month table on this page gives the full range.
- How long has Noyo River near Fort Bragg, CA been measured?
- Discharge records at USGS site 11468500 begin in 1951, about 75 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Noyo River near Fort Bragg, CA?
- The gauge sits at 39.42818, -123.73777, in California, in hydrologic subbasin 18010108, at an elevation of about 14 feet, draining roughly 106 square miles.
- Can I use Noyo River near Fort Bragg, 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.