USGS Streamgage 11243405
SF Willow C near Bass Lake, CA
SF Willow C near Bass Lake, CA is USGS streamgage 11243405 in California, monitoring river discharge in hydrologic subbasin 18040006. It drains a watershed of about 25 square miles. Discharge records at this site go back to 2009. Typical flow runs near 4.5 cfs in July and 7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 25 sq mi
- Gauge elevation
- 3,440 ft
- Subbasin (HUC-8)
- 18040006
- Coordinates
- 37.29389, -119.50028
- USGS site number
- 11243405
- Records begin
- 2009-10-01 (17 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 16 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 | 2.6 | 7.2 | 13.5 | |
| February | — | 9.2 | — | |
| March | — | 6 | — | |
| April | — | 7 | — | |
| May | — | 6.9 | — | |
| June | 0.6 | 5.7 | 14 | |
| July | 0.3 | 4.5 | 13.5 | |
| August | 0.3 | 3.9 | 12.5 | |
| September | 0.2 | 3.1 | 9.9 | |
| October | 0.3 | 3.4 | 10.2 | |
| November | 2 | 6 | 12.3 | |
| December | 3.2 | 7.6 | 13.8 |
All values in cubic feet per second (cfs).
Common questions
- When does SF Willow C near Bass Lake, CA normally run highest?
- February, on the long-term record. The median daily flow that month is about 9.2 cfs, against 3.1 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 SF Willow C near Bass Lake, CA?
- It depends on the month. In January, half of days historically fall near 7.2 cfs, with the middle 80% of days between 2.6 and 13.5 cfs. The month-by-month table on this page gives the full range.
- How long has SF Willow C near Bass Lake, CA been measured?
- Discharge records at USGS site 11243405 begin in 2009, about 17 years, covering roughly 3,358 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is SF Willow C near Bass Lake, CA?
- The gauge sits at 37.29389, -119.50028, in California, in hydrologic subbasin 18040006, at an elevation of about 3,440 feet, draining roughly 25 square miles.
- Can I use SF Willow C near Bass Lake, 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
- NF Willow C near Bass Lake, CA
- NF Willow C below Manzanita Lake Dam near North Fork, CA
- Willow C near North Fork, CA
- Willow C A Mouth near Auberry, CA
- San Joaquin River near Auberry, CA
- Madera Cn A Friant, CA
- MF San Joaquin River near Mammoth Lakes, CA
- SF San Joaquin River Ab Hooper C near Florence Lake, CA