Rivermatics

USGS Streamgage 11421000

Yuba River near Marysville, CA

Yuba River near Marysville, CA is USGS streamgage 11421000 in California, monitoring river discharge in hydrologic subbasin 18020125. It sits on the Yuba River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 1,339 square miles. Discharge records at this site go back to 1943. Typical flow runs near 1,206.8 cfs in July and 2,031.7 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
1,339 sq mi
Gauge elevation
1 ft
Subbasin (HUC-8)
18020125
Coordinates
39.17573, -121.52496
USGS site number
11421000
Records begin
1943-01-22 (83 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Yuba River near Marysville, 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
842 864 895
831 864 898
819 864 903
804 865 910
786 865 917
759 866 926
729 868 936
704 868 945
672 866 954
623 857 957
611 846 955
588 834 956
586 821 957
580 811 960

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 57 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 585.8 1,607.4 7,734.5
February 692.6 2,025.9 9,232.1
March 685.4 2,781.9 9,979
April 438.8 2,031.7 6,863.7
May 332.3 1,566.8 6,894.8
June 301.7 1,066.4 5,158.7
July 236.7 1,206.8 2,560.3
August 366.3 1,265 2,436.1
September 378.2 641.8 2,567.3
October 402.2 641 2,007.4
November 440 647 2,524
December 505.8 976.6 4,976.8

All values in cubic feet per second (cfs).

Common questions

When does Yuba River near Marysville, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 2,781.9 cfs, against 641 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Yuba River near Marysville, CA?
It depends on the month. In January, half of days historically fall near 1,607.4 cfs, with the middle 80% of days between 585.8 and 7,734.5 cfs. The month-by-month table on this page gives the full range.
How long has Yuba River near Marysville, CA been measured?
Discharge records at USGS site 11421000 begin in 1943, about 83 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 Yuba River near Marysville, 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 Yuba River near Marysville, CA?
The gauge sits at 39.17573, -121.52496, in California, in hydrologic subbasin 18020125, at an elevation of about 1 feet, draining roughly 1,339 square miles.
Can I use Yuba River near Marysville, 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 Yuba River

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

Other gauges in this subbasin