Rivermatics

USGS Streamgage 11289000

Modesto Cn near La Grange, CA

Modesto Cn near La Grange, CA is USGS streamgage 11289000 in California, monitoring river discharge in hydrologic subbasin 18040009. Discharge records at this site go back to 1909. Typical flow runs near 782.5 cfs in July and 583.6 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

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Gauge details

State
California
Gauge elevation
270 ft
Subbasin (HUC-8)
18040009
Coordinates
37.67241, -120.47488
USGS site number
11289000
Records begin
1909-01-01 (117 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Modesto Cn near La Grange, 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
321 450 567
300 496 685
293 511 701
279 520 719
257 497 687
229 473 662
218 479 686
244 505 724
209 489 706
186 492 731
143 458 683
161 464 688
147 461 701
158 476 740

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 118 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 0 0.6 201.3
February 0 4.1 300.5
March 5.4 212.4 692.6
April 192.1 583.6 1,025.8
May 376.5 751.1 1,206.1
June 498.6 843 1,219
July 419.5 782.5 1,140.6
August 158.2 704.2 973.5
September 48.8 483.2 771.9
October 0.1 216.7 600.2
November 0 8 355
December 0 0.6 277.2

All values in cubic feet per second (cfs).

Common questions

When does Modesto Cn near La Grange, CA normally run highest?
June, on the long-term record. The median daily flow that month is about 843 cfs, against 0.6 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Modesto Cn near La Grange, CA?
It depends on the month. In January, half of days historically fall near 0.6 cfs, with the middle 80% of days between 0 and 201.3 cfs. The month-by-month table on this page gives the full range.
How long has Modesto Cn near La Grange, CA been measured?
Discharge records at USGS site 11289000 begin in 1909, about 117 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 Modesto Cn near La Grange, 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 Modesto Cn near La Grange, CA?
The gauge sits at 37.67241, -120.47488, in California, in hydrologic subbasin 18040009, at an elevation of about 270 feet.
Can I use Modesto Cn near La Grange, 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