CNRFC - Hydrology - River Guidance - Graphical RVF

TUOLUMNE RIVER - MODESTO (MDSC1)

Latitude: 37.63º N	Longitude: 120.99º W	Elevation: 90 Feet
Location: Stanislaus County in California		River Group: San Joaquin

Issuance Time:

Oct 17 2021 at 11:16 AM PDT

Next Issuance:

Oct 18 2021 at 9:00 AM PDT

Monitor Stage: 50.5 Feet

Flood Stage: 55.0 Feet

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
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
2016*	2,830	43.88	Mar 15, 2016
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)

Tonight: Mostly cloudy. Rain showers likely in the evening, then a chance of rain showers after midnight. Breezy. Lows 42 to 48. West winds 15 to 25 mph decreasing to 10 to 15 mph after midnight.

Monday: Partly cloudy in the morning then clearing. Highs 57 to 64. Southwest winds around 10 mph shifting to the northwest in the afternoon.

Monday Night: Mostly clear. Lows 36 to 46. Northwest winds around 10 mph shifting to the southeast up to 10 mph after midnight.

Tuesday: Mostly sunny. Highs 63 to 69. Southeast winds up to 15 mph.

Tuesday Night: Mostly cloudy. A slight chance of rain showers in the evening, then a chance of rain showers after midnight. Lows 47 to 55. South winds around 10 mph.

Wednesday: Mostly cloudy with rain showers likely. Highs 62 to 68.

Wednesday Night: Mostly cloudy with a chance of rain showers. Lows 48 to 58.

Thursday: Mostly cloudy with a slight chance of rain showers. Highs 69 to 75.

Thursday Night and Friday: Mostly cloudy with a chance of rain showers. Lows 52 to 60. Highs 65 to 75.

Friday Night and Saturday: Mostly cloudy with a slight chance of rain showers. Lows 45 to 53. Highs 62 to 72.

Saturday Night and Sunday: Mostly cloudy with a chance of rain showers. Lows 48 to 54. Highs 60 to 67.

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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