USGS Streamgage 11126400
Santa Ynez River A Hwy 154 near Santa Ynez, CA
Santa Ynez River A Hwy 154 near Santa Ynez, CA is USGS streamgage 11126400 in California, monitoring river discharge in hydrologic subbasin 18060010. It drains a watershed of about 429 square miles. Discharge records at this site go back to 2007. Typical flow runs near 40.7 cfs in July and 13.2 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- California
- Drainage area
- 429 sq mi
- Gauge elevation
- 498 ft
- Subbasin (HUC-8)
- 18060010
- Coordinates
- 34.59011, -120.02536
- USGS site number
- 11126400
- Records begin
- 2007-10-03 (19 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 4 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 | — | 12.4 | — | |
| February | — | 16.6 | — | |
| March | — | 14.5 | — | |
| April | — | 13.2 | — | |
| May | — | 13 | — | |
| June | — | 26.7 | — | |
| July | — | 40.7 | — | |
| August | — | 34.2 | — | |
| September | — | 32.7 | — | |
| October | — | 16.4 | — | |
| November | — | 13.2 | — | |
| December | — | 12.8 | — |
All values in cubic feet per second (cfs).
Common questions
- When does Santa Ynez River A Hwy 154 near Santa Ynez, CA normally run highest?
- July, on the long-term record. The median daily flow that month is about 40.7 cfs, against 12.4 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- How long has Santa Ynez River A Hwy 154 near Santa Ynez, CA been measured?
- Discharge records at USGS site 11126400 begin in 2007, about 19 years, covering roughly 1,397 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Santa Ynez River A Hwy 154 near Santa Ynez, CA?
- The gauge sits at 34.59011, -120.02536, in California, in hydrologic subbasin 18060010, at an elevation of about 498 feet, draining roughly 429 square miles.
- Can I use Santa Ynez River A Hwy 154 near Santa Ynez, 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.