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| MIDDLE FORK COSUMNES RIVER - SOMERSET (SOSC1) | ||||||||||||||||||
| Latitude: 38.62º N | Longitude: 120.70º W | Elevation: 1821 Feet | ||||||||||||||||
| Location: El Dorado County in CA | ||||||||||||||||||
| River Group: San Joaquin | ||||||||||||||||||
| Issuance Time: | Jan 11 2026 at 8:39 AM PST |
| 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. |
| 4x5-Day Probability Plot |
| Tabular 4 x 5-Day Streamflow Volume Data | |||||
| Observed Peak 1-Day Streamflow Volume: (April 1 at 12 UTC to August 1 at 12 UTC) | Observed Available Apr 2 to Aug 1 | ||||
| Forecast Peak 1-Day Streamflow Volume: (April 1 at 12 UTC to August 1 at 12 UTC) | 10% (Max) 05/05/2026 5.3kaf | 25% 04/28/2026 2.3kaf | 50% (Prob) 04/16/2026 1.2kaf | 75% 04/03/2026 0.7kaf | 90% (Min) 04/01/2026 0.6kaf |
| Tabular 5-Day Volume Accumulations (1000s of Acre-Feet) | ||||
| Probability | 01/11 to 01/16 | 01/16 to 01/21 | 01/21 to 01/26 | 01/26 to 01/31 |
| 10% | 3.4 kaf | 3.0 kaf | 6.6 kaf | 6.5 kaf |
| 25% | 3.3 kaf | 2.8 kaf | 3.8 kaf | 3.8 kaf |
| 50% (Median) | 3.3 kaf | 2.7 kaf | 2.2 kaf | 2.3 kaf |
| 75% | 3.3 kaf | 2.6 kaf | 2.0 kaf | 1.5 kaf |
| 90% | 3.2 kaf | 2.5 kaf | 1.9 kaf | 1.3 kaf |
| Location Photographs | ||
| ESRI™ Locator Map |
| Official 7 Day National Weather Service Forecast (CAZ067) |
| Tonight: Mostly clear. Lows 36 to 44. Light winds. Monday: Patchy dense fog in the morning. Sunny. Highs 55 to 63. Light winds. Monday Night: Clear. Lows 38 to 46. Light winds. Tuesday: Sunny. Highs 56 to 68. Light winds. Tuesday Night: Clear. Lows 39 to 49. Light winds. Wednesday: Sunny. Highs 57 to 69. Wednesday Night: Clear. Lows 41 to 51. Thursday through Friday Night: Clear. Highs 60 to 70. Lows 41 to 51. Saturday through Sunday: Mostly clear. Highs 59 to 69. Lows 41 to 49. |