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TUOLUMNE RIVER - MODESTO (MDSC1)
Latitude:
37.63º N
Longitude:
120.99º W
Elevation:
60 Feet
Location: Stanislaus County in CA
River Group: San Joaquin
Forecast Issued: May 07 2025 at 7:51 AM PDT
Next Issuance: May 08 2025 at 9:00 AM PDT

Action/
Monitor:
50.5 Ft
Minor
Flood:
55.0 Ft
Moderate
Flood:
66.0 Ft
Major
Flood:
67.0 Ft

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Graphical River Forecast - TUOLUMNE RIVER - MODESTO (MDSC1)Graphical River Forecast - TUOLUMNE RIVER - MODESTO (MDSC1)

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2024*
5,750
48.86
Mar 3, 2024
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
 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

Flood Impacts
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.
55.0 FeetThis is channel capacity through downtown Modesto.