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
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
Impacts - E19 Information
55.0 FeetThis is channel capacity through downtown Modesto.
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.
Official 7 Day National Weather Service Forecast   (CAZ019)
Tonight: Clear. Lows 50 to 58. West winds up to 15 mph with gusts to around 25 mph.

Wednesday: Sunny. Highs 80 to 89. Northwest winds up to 15 mph with gusts to around 25 mph.

Wednesday Night: Clear. Lows 54 to 62. Northwest winds up to 15 mph. Gusts up to 25 mph in the evening.

Thursday: Sunny. Highs 86 to 94. Northwest winds up to 10 mph with gusts to around 20 mph.

Thursday Night: Clear. Lows 57 to 65. Northwest winds up to 10 mph with gusts to around 20 mph.

Friday: Sunny. Highs 89 to 97.

Friday Night: Clear. Lows 54 to 62.

Saturday and Saturday Night: Clear. Highs 83 to 92. Lows 53 to 62.

Sunday through Monday Night: Mostly clear. Highs 82 to 92. Lows 54 to 64.

Tuesday: Mostly sunny. Highs 89 to 97.
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.