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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: Jul 07 2025 at 7:39 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.
Created with Highcharts 9.2.1Daily Observed​Volumes (1000s Ac-​Ft)Water Year 2025 - Day (mm/dd)Seasonal Volumes​(1000s Ac-Ft)Chart context menuMF COSUMNES - SOMERSET, NR (SOSC1) 07/07/2025​Median Forecast: 30.6 kafCreated: 07/07/2025 at 07:41 AM PDT​Median: -9999 kaf​Median: -9999 kafApr 02​1.14 kaf​Apr 02​1.14 kaf​Record Low: ​12.4 kaf in 2015​Record Low: ​12.4 kaf in 2015​Record High: ​116 kaf in 2011​Record High: ​116 kaf in 2011Apr-Jul Vol MeanApr-Jul Vol MedianSeason to Date MeanSeason to Date MedianSeason to Date ObsDaily ObsObs PeakApr-Jul Fcst 50%Apr-Jul Fcst 25/75%Apr-Jul Fcst 10/90%Apr-Jul Fcst Max/MinRecord LowRecord HighSnow Model Updates Observed Season to Date Percent of Mean: N/A% (28.4 kaf) Season to Date Mean: M kaf​ Historical Apr-Jul Vol Max: 116 kaf in 2011 Historical Apr-Jul Vol Min: 12.4 kaf in 2015​ This product only considers meteorological uncertainty and does not account for hydrologic uncertainty.​ Means/medians are based on the period of Water Years 1980 through 2023.​ Legend entries below can be toggled on/off.00.250.50.7511.251.51.7522.252.52.75310/01​202411/01​202412/01​202401/01​202502/01​202503/01​202504/01​202505/01​202506/01​202507/01​202508/01​202509/01​202509/30​20250153045607590105120135150165180

Location Photographs

ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ067)
Today: Sunny. Highs 82 to 92. Prevailing southwest winds up to 10 mph.

Tonight: Clear. Lows 55 to 65. Prevailing west winds up to 10 mph in the evening becoming light.

Wednesday: Sunny. Highs 83 to 93. Light winds becoming west up to 10 mph in the afternoon.

Wednesday Night: Clear. Lows 60 to 68. Prevailing west winds up to 10 mph in the evening becoming light.

Thursday: Sunny, warmer. Highs 88 to 100. Light winds becoming west up to 10 mph in the afternoon.

Thursday Night: Clear. Lows 64 to 72.

Friday: Sunny. Highs 91 to 101.

Friday Night through Monday: Clear. Lows 62 to 72. Highs 90 to 101.