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TUOLUMNE RIVER - NEW DON PEDRO RESERVOIR (NDPC1)
Latitude:
37.70º N		Longitude:
120.42º W		Elevation:
272 Feet
Location: Tuolumne County in CA
River Group: San Joaquin
Issuance Time: Jun 01 2025 at 8:28 AM PDT
Please Note:Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.

Flow data on this product are unregulated / full natural flow.
2025 Seasonal Trend Plot (Year View)Tabular View  |  Select a Different Water Year:  
Note: The chart below functions better in landscape orientation.
Created with Highcharts 9.2.1Daily Observed​Volumes (1000s Ac-​Ft)Water Year 2025 - Day (mm/dd)Seasonal Volumes​(1000s Ac-Ft)Chart context menuTUOLUMNE - LA GRANGE, NR (NDPC1) 06/01/2025​Median Forecast: 886 kaf | 73% of Mean | 87% of MedianCreated: 06/01/2025 at 08:28 AM PDT​Mean: 1210 kaf​Mean: 1210 kaf​Median: 1020 kaf​Median: 1020 kafMay 12​19.8 kaf​May 12​19.8 kaf​Record Low: ​289 kaf in 1977​Record Low: ​289 kaf in 1977​Record High: ​2650 kaf in 1983​Record High: ​2650 kaf in 1983Apr-Jul Vol MeanApr-Jul Vol MedianSeason to Date MeanSeason to Date MedianSeason to Date ObsDaily ObsObs PeakApr-Jul Fcst 50%Apr-Jul Fcst 25/75%Apr-Jul Fcst 10/90%Apr-Jul Fcst Max/MinRecord LowRecord HighSnow Model Updates Observed Season to Date Percent of Mean: 89% (662 kaf) Season to Date Mean: 744 kaf​ Historical Apr-Jul Vol Max: 2650 kaf in 1983 Historical Apr-Jul Vol Min: 289 kaf in 1977​ This product only considers meteorological uncertainty and does not account for hydrologic uncertainty.​ Means/medians are based on the period of Water Years 1980 through 2023.​ Legend entries below can be toggled on/off.02.557.51012.51517.52022.52527.53010/01​202411/01​202412/01​202401/01​202502/01​202503/01​202504/01​202505/01​202506/01​202507/01​202508/01​202509/01​202509/30​20250300600900120015001800210024002700300033003600

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ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ019)
Tonight: Clear, cooler. Lows 50 to 58. Northwest winds up to 15 mph. Gusts up to 25 mph in the evening.

Monday: Sunny. Highs 85 to 94. West winds up to 10 mph with gusts to around 20 mph.

Monday Night: Mostly clear. Lows 53 to 61. Northwest winds up to 15 mph.

Tuesday: Sunny. Highs 84 to 93. Northwest winds up to 10 mph.

Tuesday Night: Clear. Lows 54 to 62. Northwest winds up to 15 mph.

Wednesday: Sunny. Highs 86 to 94.

Wednesday Night: Clear. Lows 55 to 63.

Thursday through Sunday: Clear. Highs 87 to 97. Lows 55 to 65.