National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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TUOLUMNE RIVER - MODESTO (MDSC1)
Latitude: 37.63º NLongitude: 120.99º WElevation: 90 Feet
Location: Stanislaus County in CaliforniaRiver Group: San Joaquin
Issuance Time: Dec 10 2018 at 1:40 PM PSTNext Issuance: Dec 11 2018 at 9:00 AM PST
Monitor Stage: 50.5 FeetFlood Stage: 55.0 Feet
Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Verification - Historical Graphical RVF
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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2017*
16,200
58.97
Feb 22, 2017
2016*
2,830
43.88
Mar 15, 2016
2015*
1,160
40.81
Apr 6, 2015
2014*
1,240
40.98
Apr 18, 2014
2013*
1,860
42.19
Dec 25, 2012
 Historical High Stage/Flow Events (Period of Record - February 1895 to Present)**
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
Official 7 Day National Weather Service Forecast   (CAZ019)
Tonight: Mostly clear. Patchy dense fog after midnight. Lows 33 to 43. Northwest winds up to 10 mph with gusts to around 25 mph.

Tuesday: Partly cloudy in the morning then clearing. Areas of fog and locally dense in the morning. Highs around 55. Light winds becoming west up to 10 mph in the afternoon. Gusts up to 20 mph.

Tuesday Night: Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows 35 to 45. Light winds.

Wednesday: Partly cloudy in the morning then becoming mostly sunny. Patchy fog in the morning. Highs around 58. Northwest winds up to 15 mph.

Wednesday Night: Mostly clear. Lows 34 to 44. Northwest winds around 10 mph in the evening becoming light.

Thursday: Mostly sunny. Highs around 59.

Thursday Night: Mostly clear. Lows 37 to 45.

Friday: Mostly cloudy with a slight chance of rain. Highs around 59.

Friday Night: Mostly cloudy with a chance of rain. Lows 39 to 45.

Saturday: Mostly cloudy. Highs around 57.

Saturday Night: Mostly cloudy with a slight chance of rain. Lows 41 to 47.

Sunday: Rain likely. Highs 53 to 58.

Sunday Night: Rain likely. Lows 41 to 47.

Monday: Mostly cloudy with a slight chance of rain. Highs around 57.
Impacts - E19 Information
55.0 FeetThis is channel capacity through downtown Modesto.
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.
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.