USGS Streamgage 11289500
Turlock Cn near La Grange, CA
Turlock Cn near La Grange, CA is USGS streamgage 11289500 in California, monitoring river discharge in hydrologic subbasin 18040009. Discharge records at this site go back to 1899. Typical flow runs near 1,430.3 cfs in July and 986.9 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- California
- Gauge elevation
- 280 ft
- Subbasin (HUC-8)
- 18040009
- Coordinates
- 37.66574, -120.44099
- USGS site number
- 11289500
- Records begin
- 1899-07-01 (127 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 127 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 | 0 | 9.1 | 320.2 | |
| February | 0 | 18.4 | 478.6 | |
| March | 3.4 | 396.7 | 1,156.6 | |
| April | 234.8 | 986.9 | 1,733 | |
| May | 461.2 | 1,286.8 | 1,823.9 | |
| June | 615.2 | 1,454 | 1,908 | |
| July | 453 | 1,430.3 | 2,094.5 | |
| August | 180.2 | 1,252.6 | 1,840.6 | |
| September | 35.9 | 740.1 | 1,338.7 | |
| October | 0.2 | 204.5 | 890.4 | |
| November | 0 | 2.8 | 475.6 | |
| December | 0 | 7.1 | 419.3 |
All values in cubic feet per second (cfs).
Common questions
- When does Turlock Cn near La Grange, CA normally run highest?
- June, on the long-term record. The median daily flow that month is about 1,454 cfs, against 2.8 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Turlock Cn near La Grange, CA?
- It depends on the month. In January, half of days historically fall near 9.1 cfs, with the middle 80% of days between 0 and 320.2 cfs. The month-by-month table on this page gives the full range.
- How long has Turlock Cn near La Grange, CA been measured?
- Discharge records at USGS site 11289500 begin in 1899, about 127 years, covering roughly 9,125 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Turlock Cn near La Grange, CA?
- The gauge sits at 37.66574, -120.44099, in California, in hydrologic subbasin 18040009, at an elevation of about 280 feet.
- Can I use Turlock Cn near La Grange, 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
- Tuolumne River below Lagrange Dam near Lagrange, CA
- Combined Flow Tuolumne River + Modesto Cn + Turlock Cn
- Dry C A Crabtree Rd near La Grange, CA
- Tuolumne River A Modesto, CA
- Tuolumne River A Grand Cyn of Tuolumne Ab Hetch Hetchy
- Tuolumne River near Hetch Hetchy, CA
- Tuolumne River Ab Early Intake near Mather, CA
- Tuolumne River below Early Intake near Mather, CA