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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: Apr 30 2025 at 8:42 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.
4x5-Day Probability Plot
Tabular 4 x 5-Day Streamflow Volume Data
Observed
Peak 1-Day Streamflow Volume:
(April 1 at 12 UTC to Current Date at 12 UTC)
  Observed
04/02/2025
1.1kaf
  

Forecast
Peak 1-Day Streamflow Volume:
(Current Date at 12 UTC to August 1 at 12 UTC)
10% (Max)
05/29/2025
1.0kaf
25%
05/16/2025
0.8kaf
50% (Prob)
05/05/2025
0.6kaf
75%
05/05/2025
0.4kaf
90% (Min)
05/02/2025
0.4kaf
Tabular 5-Day Volume Accumulations (1000s of Acre-Feet)
Probability04/30 to 05/0505/05 to 05/1005/10 to 05/1505/15 to 05/20
10%2.6 kaf2.8 kaf2.5 kaf3.0 kaf
25%2.2 kaf2.2 kaf1.7 kaf1.4 kaf
50%
(Median)
2.0 kaf1.7 kaf1.2 kaf1.1 kaf
75%1.8 kaf1.4 kaf1.1 kaf0.9 kaf
90%1.6 kaf1.3 kaf1.0 kaf0.8 kaf

Location Photographs

ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ067)
Tonight: Clear. A slight chance of showers and thunderstorms early in the evening. Lows 51 to 57. Light winds.

Thursday: Sunny. Highs 72 to 82. Light winds becoming west up to 10 mph in the afternoon.

Thursday Night: Clear. Lows 50 to 56. Light winds.

Friday: Sunny. Highs 70 to 78. Light winds becoming southwest up to 10 mph in the afternoon.

Friday Night: Mostly clear in the evening then becoming mostly cloudy. Lows 48 to 54. Prevailing southwest winds up to 10 mph in the evening becoming light.

Saturday: Mostly cloudy with a chance of rain showers. Highs 56 to 66.

Saturday Night: Mostly cloudy with a chance of rain showers. Lows 42 to 48.

Sunday: Mostly cloudy with a slight chance of rain showers. Highs 56 to 71.

Sunday Night: Partly cloudy with a slight chance of rain showers. Lows 44 to 50.

Monday through Tuesday: Mostly clear. Highs 64 to 76. Lows 44 to 54.

Tuesday Night: Clear. Lows 49 to 55.

Wednesday: Mostly sunny. Highs 68 to 78.