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TUOLUMNE RIVER - MODESTO (MDSC1)
Latitude: 37.63º NLongitude: 120.99º WElevation: 60 Feet
Location: Stanislaus County in CaliforniaRiver Group: San Joaquin
Monitor Stage: 50.5 FeetFlood Stage: 55.0 Feet

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

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2025* 1,800 41.52 Mar 19, 2025
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
 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
1895 19,600 20.70 Feb 13, 1895
1940* 18,200 63.10 Mar 27, 1940
 * 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
Official 7 Day National Weather Service Forecast   (CAZ019)
Today: Sunny. Highs 76 to 83. Northwest winds up to 10 mph with gusts to around 20 mph.

Tonight: Mostly clear. Lows 51 to 57. Northwest winds up to 15 mph.

Thursday: Mostly cloudy in the morning then becoming partly cloudy. Highs 72 to 81. Northwest winds up to 10 mph.

Thursday Night: Mostly cloudy. A chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Lows 51 to 59. Northwest winds up to 10 mph.

Friday: Mostly cloudy. A chance of rain in the morning, then rain showers and a chance of thunderstorms in the afternoon. Highs 64 to 73. Light winds becoming south around 10 mph in the afternoon.

Friday Night: Rain showers and a slight chance of thunderstorms. Lows 49 to 56.

Saturday: Mostly cloudy with rain showers likely and a chance of thunderstorms. Highs 62 to 70.

Saturday Night: Mostly cloudy with a chance of rain. Lows 44 to 49.

Sunday: Mostly cloudy with a chance of rain showers and a slight chance of thunderstorms. Highs 57 to 65.

Sunday Night: Partly cloudy with a slight chance of rain. Lows 41 to 47.

Monday through Tuesday: Mostly clear. Highs 64 to 74. Lows 41 to 48.
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.
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.