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TUOLUMNE RIVER - HETCH HETCHY RESERVOIR (HETC1)
Latitude:
37.95º N
Longitude:
119.79º W
Elevation:
3870 Feet
Location: Tuolumne County in CA
River Group: San Joaquin
Issuance Time: Jul 10 2025 at 8:27 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.

Location Photographs

ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ323)
Today: Sunny. Highs 71 to 83. Southeast winds up to 10 mph shifting to the southwest in the afternoon.

Tonight: Clear. Lows 48 to 62. Northwest winds up to 10 mph shifting to the east after midnight.

Saturday: Sunny. Highs 71 to 83. East winds up to 5 mph shifting to the southwest in the afternoon.

Saturday Night: Clear. Lows 48 to 62. West winds up to 10 mph shifting to the northeast after midnight.

Sunday: Sunny. Highs 72 to 84. Northeast winds up to 5 mph shifting to the southwest in the afternoon.

Sunday Night through Tuesday Night: Clear. Lows 44 to 62. Highs 70 to 85.

Wednesday: Sunny. Highs 67 to 79.

Wednesday Night: Mostly clear. Lows 44 to 56.

Thursday: Sunny. Highs 66 to 78.