USGS Streamgage 11051502
Sar Supp Gage near Mentone, CA
Sar Supp Gage near Mentone, CA is USGS streamgage 11051502 in California, monitoring river discharge in hydrologic subbasin 18070203. Discharge records at this site go back to 1977. Typical flow runs near 2.4 cfs in July and 2.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Gauge elevation
- 1,956 ft
- Subbasin (HUC-8)
- 18070203
- Coordinates
- 34.10834, -117.10059
- USGS site number
- 11051502
- Records begin
- 1977-10-01 (49 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 49 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 | 3 | 21.1 | |
| February | 0 | 3.2 | 23.5 | |
| March | 0 | 2.6 | 25.4 | |
| April | 0 | 2.8 | 25.7 | |
| May | 0 | 3.5 | 28.5 | |
| June | 0 | 2 | 28.9 | |
| July | 0 | 2.4 | 24.9 | |
| August | 0 | 1.5 | 16.9 | |
| September | 0 | 1.9 | 15.5 | |
| October | 0 | 2.4 | 16.5 | |
| November | 0 | 2.3 | 17.3 | |
| December | 0 | 3.2 | 18.3 |
All values in cubic feet per second (cfs).
Common questions
- When does Sar Supp Gage near Mentone, CA normally run highest?
- May, on the long-term record. The median daily flow that month is about 3.5 cfs, against 1.5 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Sar Supp Gage near Mentone, CA?
- It depends on the month. In January, half of days historically fall near 3 cfs, with the middle 80% of days between 0 and 21.1 cfs. The month-by-month table on this page gives the full range.
- How long has Sar Supp Gage near Mentone, CA been measured?
- Discharge records at USGS site 11051502 begin in 1977, about 49 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 Sar Supp Gage near Mentone, CA?
- The gauge sits at 34.10834, -117.10059, in California, in hydrologic subbasin 18070203, at an elevation of about 1,956 feet.
- Can I use Sar Supp Gage near Mentone, 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.