CNRFC - Hydrology - Observed River/Reservoir Conditions

TUOLUMNE RIVER - MODESTO (MDSC1)

Latitude: 37.63º N	Longitude: 120.99º W	Elevation: 60 Feet
Location: Stanislaus County in California		Bulletin Group: San Joaquin		River Group: San Joaquin

Monitor Stage: 50.5 Feet

Flood Stage: 55.0 Feet

Plot Type:

Observed Data Credit
	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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Impacts - E19 Information
55.0 Feet	This is channel capacity through downtown Modesto.
67.0 Feet	Extensive 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 slight chance of showers and thunderstorms early in the afternoon. A chance of rain showers and a slight chance of thunderstorms late in the afternoon. Highs 60 to 70. West winds 10 to 15 mph with gusts to around 30 mph.

Tonight: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows 43 to 51. West winds 10 to 15 mph. Gusts up to 35 mph decreasing to 25 mph after midnight.

Saturday: Sunny. Highs 66 to 75. Northwest winds 10 to 15 mph.

Saturday Night: Mostly clear. Lows 46 to 52. Northwest winds 10 to 15 mph.

Sunday: Sunny. Highs 69 to 78. Northwest winds up to 15 mph.

Sunday Night: Clear. Lows 44 to 50.

Monday: Sunny. Highs 70 to 78.

Monday Night through Wednesday Night: Clear. Lows 47 to 56. Highs 72 to 82.

Thursday: Mostly sunny. Highs 72 to 80.

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.

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