National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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TUOLUMNE RIVER - MODESTO (MDSC1)
Latitude: 37.63º NLongitude: 120.99º WElevation: 60 Feet
Location: Stanislaus County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Action/Monitor: 50.5 FeetMinor Flood: 55.0 FeetModerate Flood: 66.0 FeetMajor Flood: 67.0 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View US Geological Survey (USGS) Data for this station location.

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2024*
5,750
48.86
Mar 3, 2024
2023*
10,800
54.79
Mar 31, 2023
2022*
1,710
41.32
Apr 17, 2022
2021*
2,220
42.45
Apr 16, 2021
2020*
1,410
40.39
Dec 4, 2019
 Historical High Stage/Flow Events (Period of Record - February 1895 to Present)** - Ranked by Flow
1951*
57,000
69.19
Dec 9, 1950
1997*
55,800
71.21***
Jan 4, 1997
1956*
37,600
66.43
Dec 25, 1955
1969*
32,600
65.42
Jan 27, 1969
 * Discharge affected to unknown degree by regulation or diversion
 ** Most recent continuous record back to 1943 with segmented periods back to Feb 1895
 *** Backwater effect caused by debris on railroad trestle 1500 ft downstream of gage
Location Photographs
ESRI™ Locator Map
Flood Impacts
67.0 FeetExtensive flooding occurs. Flows in excess of 40,000 cfs could cause extensive damage to residential, industrial and commercial development in Modesto downstream of gage.
55.0 FeetThis is channel capacity through downtown Modesto.
Official 7 Day National Weather Service Forecast   (CAZ019)
Today: Sunny. Highs 91 to 99. Northwest winds up to 10 mph. Gusts up to 20 mph in the afternoon.

Tonight: Clear. Lows 58 to 68. Northwest winds up to 15 mph.

Wednesday: Sunny. Highs 92 to 99. Northwest winds up to 10 mph. Gusts up to 20 mph in the afternoon.

Wednesday Night: Clear. Lows 59 to 67. Northwest winds up to 15 mph.

Thursday: Sunny. Highs 87 to 95. West winds up to 10 mph with gusts to around 20 mph.

Thursday Night: Mostly clear. Lows 56 to 62.

Independence Day: Sunny. Highs 82 to 90.

Friday Night through Monday: Clear. Lows 53 to 63. Highs 85 to 95.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Sacramento Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.