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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: Jul 06 2025 at 8:19 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 Water Year Trend Plot
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)Water Year Volumes (1000s Ac-​Ft)Chart context menuTUOLUMNE - LA GRANGE, NR (NDPC1) 07/06/2025​Median Forecast: 1350 kaf | 69% of Mean | 82% of MedianCreated: 07/06/2025 at 08:21 AM PDTMean: 1970 kaf​Mean: 1970 kafMean: 1970 kaf​Mean: 1970 kafMedian: 1650 kaf​Median: 1650 kafMedian: 1650 kaf​Median: 1650 kafFeb 14​27.1 kaf​Feb 14​27.1 kafRecord Low: ​386 kaf in 1977​Record Low: ​386 kaf in 1977Record Low: ​386 kaf in 1977​Record Low: ​386 kaf in 1977Record High: ​4860 kaf in 2017​Record High: ​4860 kaf in 2017Record High: ​4860 kaf in 2017​Record High: ​4860 kaf in 2017WY Volume MeanWY Volume MedianWY to Date ObsWY to Date MeanWY to Date MedianDaily ObsObs PeakWY Vol Fcst 50%WY Vol Fcst 25/75%WY Vol Fcst 10/90%WY Vol Fcst Max/MinRecord LowRecord HighSnow Model Updates Observed to Date Percent of Mean: 71% (1310 kaf) Water Year to Date Mean: 1830 kaf​ Historical Water Year Vol Max: 4860 kaf in 2017 Historical Water Year Vol Min: 386 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​2025050010001500200025003000350040004500500055006000

Location Photographs

ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ019)
Today: Sunny. Highs 89 to 97. Northwest winds up to 10 mph. Gusts up to 20 mph in the afternoon.

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

Tuesday: Sunny. Highs 87 to 95. Northwest winds up to 10 mph.

Tuesday Night: Clear. Lows 54 to 62. Northwest winds around 10 mph with gusts to around 20 mph.

Wednesday: Sunny. Highs 88 to 96. Northwest winds up to 10 mph.

Wednesday Night: Clear. Lows 58 to 68.

Thursday: Sunny. Highs 96 to 102.

Thursday Night through Sunday: Clear. Lows 61 to 71. Highs 94 to 104.