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: 90 Feet
Location: Stanislaus County in CaliforniaRiver Group: San Joaquin
Issuance Time: Sep 17 2021 at 7:52 AM PDTNext Issuance: Sep 18 2021 at 9:00 AM PDT
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.

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
2020*
1,410
40.39
Dec 4, 2019
2019*
7,210
50.66
Mar 8, 2019
2018*
5,030
47.26
Apr 7, 2018
2017*
16,200
58.97
Feb 22, 2017
2016*
2,830
43.88
Mar 15, 2016
 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)
Today: Sunny. Highs 83 to 91. Northwest winds up to 10 mph shifting to the west around 10 mph in the afternoon.

Tonight: Clear. Lows 50 to 58. Northwest winds around 10 mph.

Saturday: Sunny. Highs 76 to 82. Northwest winds around 10 mph.

Saturday Night: Mostly clear. A slight chance of rain showers after midnight. Lows 55 to 61. Northwest winds 10 to 15 mph.

Sunday: Mostly cloudy with a slight chance of rain showers in the morning, then mostly sunny in the afternoon. Highs 74 to 80. Northwest winds up to 15 mph.

Sunday Night: Mostly clear. Lows 51 to 61.

Monday: Sunny, warmer. Highs 81 to 89.

Monday Night and Tuesday: Clear. Lows 54 to 64. Highs 83 to 93.

Tuesday Night through Wednesday Night: Mostly clear. Lows 56 to 66. Highs 87 to 95.

Thursday: Sunny. Highs 84 to 90.
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.
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.