USGS Streamgage 11172175
Coyote C Ab Hwy 237 A Milpitas, CA
Coyote C Ab Hwy 237 A Milpitas, CA is USGS streamgage 11172175 in California, monitoring river discharge in hydrologic subbasin 18050003. It drains a watershed of about 319 square miles. Discharge records at this site go back to 1999. Typical flow runs near 13.2 cfs in July and 26 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 319 sq mi
- Gauge elevation
- 7 ft
- Subbasin (HUC-8)
- 18050003
- Coordinates
- 37.42216, -121.92746
- USGS site number
- 11172175
- Records begin
- 1999-01-01 (27 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 28 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 | 12.2 | 26.3 | 345.3 | |
| February | 9.4 | 38.3 | 478.4 | |
| March | 11 | 35.4 | 520.4 | |
| April | 9 | 26 | 410.5 | |
| May | 5.9 | 18.2 | 63.4 | |
| June | 4.9 | 14.9 | 25.1 | |
| July | 4.3 | 13.2 | 17.6 | |
| August | 3.5 | 12.8 | 16.9 | |
| September | 3.7 | 12.2 | 19.7 | |
| October | 4.4 | 12.9 | 40 | |
| November | 7.5 | 15.7 | 66.4 | |
| December | 10.6 | 22.8 | 172.9 |
All values in cubic feet per second (cfs).
Common questions
- When does Coyote C Ab Hwy 237 A Milpitas, CA normally run highest?
- February, on the long-term record. The median daily flow that month is about 38.3 cfs, against 12.2 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 Coyote C Ab Hwy 237 A Milpitas, CA?
- It depends on the month. In January, half of days historically fall near 26.3 cfs, with the middle 80% of days between 12.2 and 345.3 cfs. The month-by-month table on this page gives the full range.
- How long has Coyote C Ab Hwy 237 A Milpitas, CA been measured?
- Discharge records at USGS site 11172175 begin in 1999, about 27 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 Coyote C Ab Hwy 237 A Milpitas, CA?
- The gauge sits at 37.42216, -121.92746, in California, in hydrologic subbasin 18050003, at an elevation of about 7 feet, draining roughly 319 square miles.
- Can I use Coyote C Ab Hwy 237 A Milpitas, 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.