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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: Jun 05 2025 at 8:54 AM PDT
Please Note:Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.
10-Day Accumulated Volume Plot
Tabular 10-Day Streamflow Volume Accumulation (1000s of Acre-Feet)
Data Updated: Jun 05 2025 at 8:58 AM PDT
ProbJun
06
Jun
07
Jun
08
Jun
09
Jun
10
10%
(Max)
7.716.123.429.635.6
25%
 
6.913.620.426.532.3
50%
(Prob)
6.012.418.324.029.9
75%
 
5.911.717.423.228.6
90%
(Min)
5.811.417.122.628.2
RFC
FCST
6.513.119.425.231.2
ProbJun
11
Jun
12
Jun
13
Jun
14
Jun
15
10%
(Max)
42.047.753.158.062.5
25%
 
38.243.949.154.058.4
50%
(Prob)
35.541.046.150.654.9
75%
 
34.139.344.248.852.8
90%
(Min)
33.738.843.547.751.7

Location Photographs

ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ323)
Today: Sunny in the morning then becoming partly sunny. Chance of rain late in the morning. Chance of thunderstorms early in the afternoon, then slight chance of thunderstorms late in the afternoon. Highs 58 to 72. Southeast winds up to 5 mph shifting to the southwest in the afternoon. Chance of precipitation 40 percent.

Tonight: Partly cloudy with a 20 percent chance of thunderstorms in the evening, then clear after midnight. Lows 40 to 54. Northeast winds up to 10 mph.

Saturday: Warmer, sunny. Highs 62 to 76. East winds up to 5 mph shifting to the southwest in the afternoon.

Saturday Night: Partly cloudy. Lows 42 to 56. Northwest winds up to 10 mph shifting to the northeast after midnight.

Sunday: Sunny. Highs 63 to 77. North winds up to 5 mph shifting to the west in the afternoon.

Sunday Night: Mostly clear. Lows 43 to 57.

Monday: Sunny. Highs 65 to 79.

Monday Night: Mostly clear. Lows 43 to 57.

Tuesday through Thursday: Clear. Highs 60 to 78. Lows 39 to 55.