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 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
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
2019*
7,210
50.66
Mar 8, 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
Official 7 Day National Weather Service Forecast   (CAZ019)
Tonight: Clear. Areas of frost late in the night. Colder. Lows 28 to 38. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Sunday: Widespread frost in the morning. Sunny. Highs 50 to 57. Northwest winds up to 10 mph with gusts to around 20 mph.

Sunday Night: Clear. Areas of frost after midnight. Lows 28 to 36. Northwest winds up to 10 mph with gusts to around 20 mph.

Monday: Widespread frost in the morning. Mostly sunny. Highs 52 to 58. Northwest winds up to 10 mph.

Monday Night: Partly cloudy. Areas of frost after midnight. Lows 29 to 37. Northwest winds up to 10 mph.

Tuesday: Mostly sunny. Areas of frost. Highs 51 to 58.

Tuesday Night: Mostly cloudy with a chance of rain showers. Lows 36 to 42.

Wednesday and Wednesday Night: Rain showers. Highs 48 to 55. Lows 37 to 47.

Thursday and Thursday Night: Rain showers. Highs 52 to 59. Lows 42 to 49.

Friday: Mostly cloudy with rain showers likely. Highs 52 to 59.

Friday Night: Partly cloudy with a slight chance of rain showers. Lows 39 to 45.

Saturday: Mostly cloudy. Highs 54 to 60.
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.