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: Jan 30 2023 at 1:28 PM PSTNext Issuance: Jan 31 2023 at 9:00 AM PST
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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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2017*
16,200
58.97
Feb 22, 2017
 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 after midnight. Widespread frost late in the night. Lows 26 to 34. Northwest winds 10 to 15 mph.

Tuesday: Widespread frost in the morning. Sunny. Highs around 52. Northwest winds up to 10 mph shifting to the south around 10 mph in the afternoon.

Tuesday Night: Mostly clear. Areas of frost after midnight. Lows 29 to 37. Southeast winds up to 10 mph.

Wednesday: Widespread frost in the morning. Mostly sunny. Highs 54 to 60. Southeast winds up to 10 mph.

Wednesday Night: Partly cloudy. Lows 32 to 40. Southeast winds up to 10 mph.

Thursday: Mostly cloudy. Highs 54 to 62.

Thursday Night: Cloudy with a chance of rain showers. Lows around 44.

Friday: Mostly cloudy with a slight chance of rain showers. Highs 53 to 59.

Friday Night: Partly cloudy. Lows 36 to 42.

Saturday: Mostly cloudy. Highs 54 to 60.

Saturday Night and Sunday: Mostly cloudy with a chance of rain showers. Lows 40 to 45. Highs 51 to 58.

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

Monday: Mostly cloudy. Highs 52 to 59.
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.