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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: May 08 2025 at 8:38 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: Warmer, sunny. Highs 56 to 72. Southeast winds up to 10 mph shifting to the southwest in the afternoon. Gusts up to 25 mph.

Tonight: Mostly clear. Lows 36 to 52. Southeast winds up to 10 mph.

Saturday: Sunny. Highs 57 to 73. Southeast winds up to 10 mph shifting to the southwest with gusts to around 45 mph in the afternoon.

Saturday Night: Mostly clear. Lows 36 to 50. Southwest winds 10 to 15 mph with gusts to around 45 mph shifting to the south with gusts to around 30 mph after midnight.

Sunday: Windy, sunny. Highs 49 to 63. South winds 5 to 15 mph with gusts to around 45 mph increasing to southwest 15 to 30 mph with gusts to around 65 mph in the afternoon.

Sunday Night and Monday: Breezy, cooler. Mostly clear. Lows 27 to 39. Highs 39 to 51.

Monday Night: Colder. Mostly cloudy with a 50 percent chance of snow and rain. Lows 20 to 32.

Tuesday: Partly sunny. Chance of snow in the morning, then chance of snow showers and rain showers in the afternoon. Highs 31 to 43. Chance of precipitation 50 percent.

Tuesday Night: Mostly cloudy in the evening then clearing. Lows 18 to 30.

Wednesday: Not as cool. Sunny. Highs 39 to 53.

Wednesday Night: Partly cloudy. Lows 23 to 37.

Thursday: Not as cool. Sunny. Highs 44 to 58.