USGS Streamgage 11460000
Corte Madera C A Ross, CA
Corte Madera C A Ross, CA is USGS streamgage 11460000 in California, monitoring river discharge in hydrologic subbasin 18050002. It drains a watershed of about 18 square miles. Discharge records at this site go back to 1951. Typical flow runs near 0.5 cfs in July and 6.5 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 18 sq mi
- Gauge elevation
- 10 ft
- Subbasin (HUC-8)
- 18050002
- Coordinates
- 37.96294, -122.55688
- USGS site number
- 11460000
- Records begin
- 1951-02-22 (75 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 76 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 | 1.4 | 14.9 | 271.1 | |
| February | 2.7 | 17 | 243 | |
| March | 2.7 | 17.5 | 147.7 | |
| April | 2.1 | 6.5 | 42.4 | |
| May | 1.1 | 2.7 | 6.7 | |
| June | 0.3 | 1.2 | 2.8 | |
| July | 0.1 | 0.5 | 1 | |
| August | 0 | 0.2 | 0.7 | |
| September | 0 | 0.2 | 0.9 | |
| October | 0 | 0.2 | 4 | |
| November | 0.2 | 1.8 | 30 | |
| December | 0.6 | 6.9 | 154.2 |
All values in cubic feet per second (cfs).
Common questions
- When does Corte Madera C A Ross, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 17.5 cfs, against 0.2 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 Corte Madera C A Ross, CA?
- It depends on the month. In January, half of days historically fall near 14.9 cfs, with the middle 80% of days between 1.4 and 271.1 cfs. The month-by-month table on this page gives the full range.
- How long has Corte Madera C A Ross, CA been measured?
- Discharge records at USGS site 11460000 begin in 1951, about 75 years, covering roughly 5,659 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Corte Madera C A Ross, CA?
- The gauge sits at 37.96294, -122.55688, in California, in hydrologic subbasin 18050002, at an elevation of about 10 feet, draining roughly 18 square miles.
- Can I use Corte Madera C A Ross, 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.