USGS Streamgage 11261500
San Joaquin River A Fremont Ford Bridge, CA
San Joaquin River A Fremont Ford Bridge, CA is USGS streamgage 11261500 in California, monitoring river discharge in hydrologic subbasin 18040001. It drains a watershed of about 7,615 square miles. Discharge records at this site go back to 1937. Typical flow runs near 158.6 cfs in July and 281.1 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead, alongside daily high and low water-temperature forecasts.
View live conditions & forecast →
Gauge details
- State
- California
- Drainage area
- 7,615 sq mi
- Gauge elevation
- -1 ft
- Subbasin (HUC-8)
- 18040001
- Coordinates
- 37.30991, -120.931
- USGS site number
- 11261500
- Records begin
- 1937-02-18 (89 years)
- Rivermatics forecast
- 14-day flow outlook + water temperature
14-day flow forecast
Based on observations through for San Joaquin River A Fremont Ford Bridge, CA. 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 |
|---|---|---|---|---|
| 44.7 | 48.9 | 52.5 | ||
| 40.6 | 49.1 | 57.2 | ||
| 39 | 49.8 | 62.5 | ||
| 38 | 50.2 | 66.1 | ||
| 36.8 | 50.4 | 69.1 | ||
| 36.2 | 51.2 | 72.9 | ||
| 35.2 | 51 | 73.5 | ||
| 33.1 | 49.9 | 73.2 | ||
| 32.1 | 49.8 | 75.2 | ||
| 31.3 | 49.4 | 74 | ||
| 30 | 49.6 | 76.1 | ||
| 33 | 54.6 | 86.3 | ||
| 32.8 | 55.1 | 86.6 | ||
| 31.6 | 54.1 | 85.1 |
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 41 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 | 99.5 | 278.5 | 3,444.8 | |
| February | 138.1 | 312.8 | 2,464.8 | |
| March | 193.8 | 438.8 | 8,381 | |
| April | 127.3 | 281.1 | 9,624.3 | |
| May | 66.4 | 234.7 | 4,489.4 | |
| June | 57.3 | 179.3 | 5,161.3 | |
| July | 36.5 | 158.6 | 1,159.1 | |
| August | 34.7 | 144.2 | 375.4 | |
| September | 27.1 | 113.4 | 288.2 | |
| October | 29.4 | 138.2 | 277.8 | |
| November | 67.4 | 193.5 | 294.5 | |
| December | 84 | 200.7 | 461.7 |
All values in cubic feet per second (cfs).
Common questions
- When does San Joaquin River A Fremont Ford Bridge, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 438.8 cfs, against 113.4 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 San Joaquin River A Fremont Ford Bridge, CA?
- It depends on the month. In January, half of days historically fall near 278.5 cfs, with the middle 80% of days between 99.5 and 3,444.8 cfs. The month-by-month table on this page gives the full range.
- How long has San Joaquin River A Fremont Ford Bridge, CA been measured?
- Discharge records at USGS site 11261500 begin in 1937, about 89 years, covering roughly 9,076 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for San Joaquin River A Fremont Ford Bridge, CA?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. A companion model forecasts each day's water-temperature high and low. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- Where is San Joaquin River A Fremont Ford Bridge, CA?
- The gauge sits at 37.30991, -120.931, in California, in hydrologic subbasin 18040001, at an elevation of about -1 feet, draining roughly 7,615 square miles.
- Can I use San Joaquin River A Fremont Ford Bridge, 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
- Mud Slough near Gustine, CA
- San Joaquin River Ab Merced River near Newman, CA
- San Joaquin River below Friant, CA
- San Joaquin River below Hwy 41 near Pinedale, CA
- San Joaquin River A Skaggs Br near Ripperdan, CA
- San Joaquin River A Gravelly Ford Cn near Kerman, CA
- San Joaquin River below Chowchilla Cn Intake near Mendota
- San Joaquin River near Mendota, CA