Rivermatics

USGS Streamgage 11475500

SF Eel River near Branscomb, CA

SF Eel River near Branscomb, CA is USGS streamgage 11475500 in California, monitoring river discharge in hydrologic subbasin 18010106. It sits on the Sf Eel River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 44 square miles. Discharge records at this site go back to 1946. Typical flow runs near 5.6 cfs in July and 151.8 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
44 sq mi
Gauge elevation
1,384 ft
Subbasin (HUC-8)
18010106
Coordinates
39.71904, -123.6528
USGS site number
11475500
Records begin
1946-10-01 (80 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for SF Eel River near Branscomb, 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
0.9 1 1.2
0.8 0.9 1.1
0.7 0.9 1.1
0.6 0.8 1.1
0.6 0.8 1.1
0.5 0.8 1.1
0.5 0.7 1.1
0.4 0.7 1
0.4 0.6 1
0.3 0.6 1
0.3 0.6 1
0.3 0.6 1.1
0.3 0.6 1.1
0.3 0.7 1.2

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 21 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 — 263.3 —
February — 591.1 —
March — 209 —
April — 151.8 —
May — 32.2 —
June — 15.2 —
July — 5.6 —
August — 1.2 —
September — 1 —
October — 3.9 —
November — 261.6 —
December — 705.5 —

All values in cubic feet per second (cfs).

Common questions

When does SF Eel River near Branscomb, CA normally run highest?
December, on the long-term record. The median daily flow that month is about 705.5 cfs, against 1 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
How long has SF Eel River near Branscomb, CA been measured?
Discharge records at USGS site 11475500 begin in 1946, about 80 years, covering roughly 674 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for SF Eel River near Branscomb, 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 SF Eel River near Branscomb, CA?
The gauge sits at 39.71904, -123.6528, in California, in hydrologic subbasin 18010106, at an elevation of about 1,384 feet, draining roughly 44 square miles.
Can I use SF Eel River near Branscomb, 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 Sf Eel River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Sf Eel River in full.

Other gauges in this subbasin