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: Feb 26 2017 at 7:56 AM PSTNext Issuance: Feb 26 2017 at 3:00 PM 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
2015*
1,160
40.81
Apr 6, 2015
2014*
1,240
40.98
Apr 18, 2014
2013*
1,860
42.19
Dec 25, 2012
2012*
1,980
42.41
May 13, 2012
2011*
9,250
53.95
Mar 26, 2011
 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)
Today: Mostly sunny in the morning then becoming partly cloudy. Highs 52 to 60. Light winds.

Tonight: Mostly cloudy. A slight chance of rain showers in the evening, then a chance of rain showers after midnight. Lows 38 to 44. West winds up to 10 mph in the evening becoming light.

Monday: Mostly cloudy. A chance of rain showers in the morning, then a slight chance of rain showers in the afternoon. Highs 50 to 60. Light winds.

Monday Night: Partly cloudy. A slight chance of rain showers in the evening. Lows 34 to 40. Northwest winds up to 10 mph.

Tuesday: Mostly sunny. Highs 52 to 61. Northwest winds up to 15 mph.

Tuesday Night: Mostly clear. Lows 34 to 40.

Wednesday: Sunny. Highs 55 to 63.

Wednesday Night and Thursday: Clear. Lows 36 to 42. Highs 59 to 66.

Thursday Night through Friday Night: Mostly clear. Lows around 44. Highs 61 to 67.

Saturday: Partly cloudy. Highs 58 to 66.
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.