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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 05 2025 at 8:25 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. |
| Monthly Probability Plot |
| Monthly Streamflow Volume (1000s of Acre-Feet) Data Updated: May 05 2025 at 8:28 AM PDT | ||||||
| Prob | May* | Jun | Jul | Aug | Sep | Oct |
| 10% | 253.7 | 171.4 | 42.3 | 13.1 | 6.5 | 16.6 |
| 25% | 245.5 | 145.4 | 32.9 | 11.6 | 5.6 | 5.7 |
| 50% | 236.3 | 128.4 | 27.9 | 10.7 | 4.9 | 3.3 |
| 75% | 219.4 | 111.0 | 25.2 | 9.8 | 4.6 | 2.8 |
| 90% | 198.7 | 93.3 | 21.9 | 9.1 | 4.2 | 2.5 |
| Mean | 219.7 | 199.0 | 82.4 | 15.3 | 5.3 | 9.0 |
| %Mean | 107.6 | 64.5 | 33.9 | 69.9 | 92.5 | 36.7 |
| Prob | Nov | Dec | Jan | Feb | Mar | Apr |
| 10% | 31.1 | 54.5 | 63.4 | 59.6 | 88.0 | 136.5 |
| 25% | 9.4 | 18.8 | 32.2 | 37.4 | 60.0 | 117.8 |
| 50% | 5.9 | 9.6 | 21.3 | 22.5 | 44.6 | 99.5 |
| 75% | 2.6 | 4.6 | 7.8 | 14.7 | 38.7 | 69.3 |
| 90% | 1.8 | 1.8 | 4.6 | 8.8 | 26.7 | 54.5 |
| Mean | 14.0 | 20.6 | 29.3 | 29.5 | 50.1 | 103.4 |
| %Mean | 42.1 | 46.6 | 72.7 | 76.3 | 89.0 | 96.2 |
| Note 1: %Mean is the "Median forecast monthly value (50%)" divided by the "monthly mean" (displayed as a %) | ||||||
| Note 2: For current month, graphic represents remaining forecast only, text represents observed + remaining forecast. | ||||||
| Location Photographs | ||
| ESRI™ Locator Map |
| Official 7 Day National Weather Service Forecast (CAZ323) |
| Today: Sunny. Highs 45 to 61. North winds up to 10 mph shifting to the northwest in the afternoon. Gusts up to 25 mph. Tonight: Mostly clear. Lows 25 to 41. Northeast winds up to 10 mph with gusts to around 25 mph. Wednesday: Sunny. Highs 49 to 63. East winds up to 5 mph shifting to the west in the afternoon. Wednesday Night: Mostly clear. Lows 31 to 45. West winds up to 10 mph shifting to the east after midnight. Thursday: Warmer, sunny. Highs 54 to 68. East winds up to 5 mph shifting to the southwest in the afternoon. Thursday Night: Partly cloudy. Lows 35 to 49. Friday through Saturday Night: Mostly clear. Highs 57 to 73. Lows 36 to 51. Sunday: Sunny. Highs 50 to 64. Sunday Night and Monday: Cooler. Partly cloudy. Lows 28 to 40. Highs 39 to 53. |