CNRFC - Hydrology - Observed River/Reservoir Conditions

TUOLUMNE RIVER - MODESTO (MDSC1)

Latitude: 37.63º N	Longitude: 120.99º W	Elevation: 90 Feet
Location: Stanislaus County in California		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
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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ019)

Today: Mostly cloudy in the morning then becoming mostly sunny. Highs 54 to 63. West winds around 10 mph.

Tonight: Mostly cloudy. A chance of rain showers after midnight. Lows 41 to 48. Southwest winds up to 10 mph shifting to the northeast around 10 mph after midnight.

Tuesday: Rain showers in the morning, then rain showers and a slight chance of thunderstorms in the afternoon. Breezy. Highs 48 to 57. Southeast winds 10 to 15 mph increasing to 15 to 25 mph in the afternoon. Gusts up to 40 mph.

Tuesday Night: Rain showers likely. Breezy. Lows around 44. Southeast winds 10 to 25 mph with gusts to around 35 mph.

Wednesday: Rain showers likely. Highs 51 to 59. Southeast winds 10 to 15 mph with gusts to around 25 mph.

Wednesday Night: Mostly cloudy with a slight chance of rain showers. Lows 40 to 46.

Thursday: Partly cloudy. Highs 54 to 62.

Thursday Night: Partly cloudy with a slight chance of rain showers. Lows around 41.

Friday and Friday Night: Mostly clear. Highs 54 to 61. Lows 35 to 41.

Saturday: Sunny. Highs 52 to 60.

Saturday Night and Sunday: Mostly clear. Lows 34 to 40. Highs 52 to 61.

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.

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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