CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

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

Issuance Time:

Oct 07 2024 at 7:31 AM PDT

Next Issuance:

Oct 08 2024 at 9:00 AM PDT

Monitor Stage: 50.5 Feet

Flood Stage: 55.0 Feet

Plot Type:

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

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
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
2019*	7,210	50.66	Mar 8, 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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Impacts - E19 Information
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.
55.0 Feet	This is channel capacity through downtown Modesto.

Official 7 Day National Weather Service Forecast (CAZ019)

Today: Sunny. Highs 91 to 98. Northwest winds up to 10 mph with gusts to around 20 mph.

Tonight: Clear, cooler. Lows 57 to 67. Northwest winds up to 10 mph. Gusts up to 20 mph in the evening.

Wednesday: Sunny. Highs 85 to 91. Northwest winds up to 10 mph.

Wednesday Night: Mostly clear in the evening then becoming mostly cloudy. Lows 57 to 67. Northwest winds up to 10 mph.

Thursday: Mostly cloudy. Highs 82 to 88. Light winds.

Thursday Night: Mostly cloudy. Lows 54 to 64.

Friday: Mostly sunny. Highs 80 to 86.

Friday Night: Partly cloudy. Lows 54 to 62.

Saturday: Partly cloudy with a slight chance of rain showers. Highs 76 to 82.

Saturday Night and Sunday: Mostly clear. Lows 54 to 62. Highs 76 to 82.

Sunday Night and Columbus Day: Clear. Lows 54 to 62. Highs 76 to 83.

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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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.