Rivermatics

USGS Streamgage 11152000

Arroyo Seco near Soledad, CA

Arroyo Seco near Soledad, CA is USGS streamgage 11152000 in California, monitoring river discharge in hydrologic subbasin 18060005. It sits on the Arroyo Seco, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 244 square miles. Discharge records at this site go back to 1901. Typical flow runs near 6.7 cfs in July and 128.3 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
244 sq mi
Gauge elevation
345 ft
Subbasin (HUC-8)
18060005
Coordinates
36.28052, -121.32271
USGS site number
11152000
Records begin
1901-10-01 (125 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Arroyo Seco near Soledad, 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 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.1

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 125 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 19.8 97.5 1,035.2
February 34.1 176 1,474.1
March 42 214.1 1,018.5
April 29.1 128.3 534.5
May 12.7 62.3 200.4
June 3.4 26.5 91.6
July 0 6.7 40.3
August 0 1.5 17.6
September 0 1 14.9
October 0 4.3 23.5
November 2.6 14.7 80.7
December 10.2 37.9 391.5

All values in cubic feet per second (cfs).

Common questions

When does Arroyo Seco near Soledad, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 214.1 cfs, against 1 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 Arroyo Seco near Soledad, CA?
It depends on the month. In January, half of days historically fall near 97.5 cfs, with the middle 80% of days between 19.8 and 1,035.2 cfs. The month-by-month table on this page gives the full range.
How long has Arroyo Seco near Soledad, CA been measured?
Discharge records at USGS site 11152000 begin in 1901, about 125 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 Arroyo Seco near Soledad, 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 Arroyo Seco near Soledad, CA?
The gauge sits at 36.28052, -121.32271, in California, in hydrologic subbasin 18060005, at an elevation of about 345 feet, draining roughly 244 square miles.
Can I use Arroyo Seco near Soledad, 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 Arroyo Seco

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

Other gauges in this subbasin