Rivermatics

USGS Streamgage 11170000

Coyote C near Madrone, CA

Coyote C near Madrone, CA is USGS streamgage 11170000 in California, monitoring river discharge in hydrologic subbasin 18050003. It drains a watershed of about 196 square miles. Discharge records at this site go back to 1903. Typical flow runs near 19.8 cfs in July and 47.5 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.

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Gauge details

State
California
Drainage area
196 sq mi
Gauge elevation
372 ft
Subbasin (HUC-8)
18050003
Coordinates
37.16824, -121.64963
USGS site number
11170000
Records begin
1903-01-27 (123 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Coyote C near Madrone, 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.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
10 10.9 11.6
10.1 11.1 12.3
10.1 11.3 12.8
10 11.2 12.8
9.9 11.2 13.1
9.9 11.3 13.4
9.8 11.2 13
9.5 11 12.7
9.3 10.8 12.5
9.5 11.2 14.3
10 12.3 19.1
10.3 12.5 19.4
10.1 12.1 17.5
9.9 11.7 15

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 5 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January — 70.6 —
February — 161.9 —
March — 66.3 —
April — 47.5 —
May — 29.3 —
June — 22.4 —
July — 19.8 —
August — 25.3 —
September — 21.6 —
October — 22.9 —
November — 25 —
December — 37.3 —

All values in cubic feet per second (cfs).

Common questions

When does Coyote C near Madrone, CA normally run highest?
February, on the long-term record. The median daily flow that month is about 161.9 cfs, against 19.8 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
How long has Coyote C near Madrone, CA been measured?
Discharge records at USGS site 11170000 begin in 1903, about 123 years, covering roughly 1,647 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 near Madrone, 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 near Madrone, CA?
The gauge sits at 37.16824, -121.64963, in California, in hydrologic subbasin 18050003, at an elevation of about 372 feet, draining roughly 196 square miles.
Can I use Coyote C near Madrone, 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.

Other gauges in this subbasin