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
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
2018*
5,030
47.26
Apr 7, 2018
 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)
Today: Rain showers until late afternoon, then rain showers and a slight chance of thunderstorms late in the afternoon. Breezy. Highs 51 to 61. South winds 10 to 15 mph with gusts to around 25 mph increasing to 15 to 25 mph with gusts to around 35 mph in the afternoon.

Tonight: Rain showers and a slight chance of thunderstorms. Windy. Lows 40 to 47. South winds 15 to 30 mph with gusts to around 50 mph.

Saturday: Rain showers and a slight chance of thunderstorms. Breezy. Highs 46 to 56. Southwest winds 15 to 25 mph. Gusts up to 40 mph decreasing to 30 mph in the afternoon.

Saturday Night: Rain showers and a slight chance of thunderstorms. Lows 38 to 43. South winds 10 to 15 mph with gusts to around 35 mph.

Sunday: Mostly cloudy with a chance of rain showers. Highs 49 to 57. South winds 10 to 15 mph.

Sunday Night: Mostly cloudy with a slight chance of rain showers. Lows 33 to 39.

Monday: Mostly sunny. Patchy frost. Highs 51 to 60.

Monday Night and Tuesday: Partly cloudy with a slight chance of rain showers. Lows 37 to 42. Highs 54 to 63.

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

Wednesday and Wednesday Night: Partly cloudy with a slight chance of rain showers. Highs 54 to 62. Lows 38 to 44.

Thursday: Mostly sunny. Highs 53 to 61.
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.