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
Issuance Time: Mar 02 2024 at 8:42 AM PSTNext Issuance: Mar 03 2024 at 9:00 AM PST
Monitor Stage: 50.5 FeetFlood Stage: 55.0 Feet

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.
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.

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
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: Mostly cloudy. A chance of rain showers in the morning, then rain showers likely in the afternoon. Highs 48 to 57. South winds 10 to 15 mph with gusts to around 25 mph.

Tonight: Mostly cloudy. A chance of rain showers in the evening. Lows 36 to 42. South winds up to 10 mph. Gusts up to 20 mph in the evening.

Monday: Mostly cloudy. Highs 51 to 60. Southeast winds up to 10 mph.

Monday Night: Mostly cloudy. A slight chance of rain showers in the evening, then a chance of rain showers after midnight. Lows 42 to 48. Southeast winds around 10 mph.

Tuesday: Mostly cloudy with a chance of rain showers. Highs 55 to 64. Southeast winds 10 to 15 mph.

Tuesday Night: Mostly cloudy with a chance of rain showers. Lows 44 to 50.

Wednesday: Mostly cloudy with a chance of rain showers. Highs 55 to 62.

Wednesday Night: Partly cloudy. Lows 39 to 45.

Thursday: Mostly sunny. Highs 56 to 65.

Thursday Night and Friday: Clear. Lows 36 to 42. Highs 60 to 67.

Friday Night: Mostly clear. Lows 40 to 46.

Saturday: Mostly cloudy. Highs 59 to 66.
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.