National Weather Service California-Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

Raw ESP Water Supply Forecast

*CAUTION: Data below is raw model output and has not been reviewed
*         by a hydrologist.

Program run: 07/10/2026 1500Z
Data ending: 07/10/2026 12Z
* All units are in thousands of acre-feet.

Station: SHDC1 (Sacramento - Shasta Dam)

MONTHLY DATA

October    Obs:  219.6  Mean:  225.5  WY-to-date: Obs:  219.6 Mean:  225.5
2025       % of mean:    97% 

November   Obs:  389.5  Mean:  299.1  WY-to-date: Obs:  609.1 Mean:  524.5
2025       % of mean:    130% 

December   Obs:  818.2  Mean:  529.3  WY-to-date: Obs: 1427.3 Mean: 1053.8
2025       % of mean:    155% 

January    Obs:  991.2  Mean:  707.5  WY-to-date: Obs: 2418.5 Mean: 1761.3
2026       % of mean:    140% 

February   Obs:  553.3  Mean:  801.9  WY-to-date: Obs: 2971.9 Mean: 2555.4
2026       % of mean:    69% 

March      Obs:  497.1  Mean:  917.6  WY-to-date: Obs: 3468.9 Mean: 3472.9
2026       % of mean:    54% 

April      Obs:  408.3  Mean:  647.8  WY-to-date: Obs: 3877.2 Mean: 4120.7
2026       % of mean:    63% 

May        Obs:  314.8  Mean:  505.4  WY-to-date: Obs: 4192.1 Mean: 4626.1
2026       % of mean:    62% 

June       Obs:  233.0  Mean:  316.1  WY-to-date: Obs: 4425.1 Mean: 4942.3
2026       % of mean:    74% 

July       Obs (thru 10@12Z):   70.5    Mean:  229.2  WY-to-date: Obs: 4495.6 Mean: 5030.0
2026       Prob. level:      90    75    50    25    10
           Fcst Residual:   133   133   133   134   135
           Obs + Fcst:      203   203   203   204   205
           % of mean:                    89% 

August     Mean:  201.8
2026       Prob. level:      90    75    50    25    10
           Forecast:        174   175   176   178   181
           % of mean:                    87% 

September  Mean:  194.3
2026       Prob. level:      90    75    50    25    10
           Forecast:        164   164   167   172   178
           % of mean:                    86% 

-------------------------------------------------------

Water Year Obs-To-Date: 4495.6    Mean: 5575.4
WY2026     Prob. level:      90    75    50    25    10
           Fcst Residual:   466   467   473   477   486
           Obs + Fcst:     4961  4963  4968  4973  4982
           % of mean:                    89%