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 sits on the Coyote C, alongside 4 other gauges Rivermatics tracks on the same river. 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. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
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)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Coyote C Ab Hwy 237 A Milpitas, CA. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 7.9 | 8.5 | 9.2 | ||
| 7.8 | 8.6 | 9.7 | ||
| 7.8 | 8.6 | 9.9 | ||
| 7.6 | 8.6 | 10 | ||
| 7.6 | 8.5 | 9.8 | ||
| 7.6 | 8.7 | 10.5 | ||
| 7.5 | 8.5 | 10.1 | ||
| 7.2 | 8.3 | 9.6 | ||
| 7.2 | 8.2 | 9.5 | ||
| 7.3 | 8.7 | 11.2 | ||
| 7.9 | 10.3 | 17.8 | ||
| 8.1 | 9.7 | 13.4 | ||
| 7.8 | 9.3 | 12.1 | ||
| 7.5 | 8.9 | 10.7 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
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 | 7.6 | 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 9,130 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Coyote C Ab Hwy 237 A Milpitas, CA?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- 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.
Upstream and downstream on the Coyote C
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Coyote C in full.
- Coyote C near Gilroy, CA 109 sq mi
- Coyote C below Coyote Reservoir near San Martin, CA 120 sq mi
- Coyote C below Coyote Ranch Rd near Coyote, CA 206 sq mi
- Coyote C near Edenvale, CA 229 sq mi
- Coyote C Ab Hwy 237 A Milpitas, CA this page