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

*** IMPORTANT ***  Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.

Raw ESP Water Supply Forecast

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

Program run: 06/21/2025 1804Z
Data ending: 06/21/2025 12Z
* All units are in thousands of acre-feet.

Station: HAPC1 (Indian Ck - Happy Camp, Nr)

MONTHLY DATA

October    Obs:    3.5  Mean:    4.8  WY-to-date: Obs:    3.5 Mean:    4.8
2024       % of mean:    73% 

November   Obs:   26.7  Mean:   14.4  WY-to-date: Obs:   30.2 Mean:   19.2
2024       % of mean:    185% 

December   Obs:   78.0  Mean:   36.5  WY-to-date: Obs:  108.3 Mean:   55.7
2024       % of mean:    214% 

January    Obs:   63.2  Mean:   44.3  WY-to-date: Obs:  171.5 Mean:  100.0
2025       % of mean:    143% 

February   Obs:   57.1  Mean:   42.2  WY-to-date: Obs:  228.6 Mean:  141.9
2025       % of mean:    135% 

March      Obs:   71.4  Mean:   48.0  WY-to-date: Obs:  300.0 Mean:  189.9
2025       % of mean:    149% 

April      Obs:   66.0  Mean:   40.4  WY-to-date: Obs:  366.0 Mean:  230.4
2025       % of mean:    163% 

May        Obs:   33.1  Mean:   31.5  WY-to-date: Obs:  399.1 Mean:  261.9
2025       % of mean:    105% 

June       Obs (thru 21@12Z):    9.2    Mean:   14.9  WY-to-date: Obs:  408.3 Mean:  274.8
2025       Prob. level:      90    75    50    25    10
           Fcst Residual:     3     3     3     3     3
           Obs + Fcst:       12    12    12    12    12
           % of mean:                    80% 

July       Mean:    6.0
2025       Prob. level:      90    75    50    25    10
           Forecast:          6     6     6     6     6
           % of mean:                   106% 

August     Mean:    3.5
2025       Prob. level:      90    75    50    25    10
           Forecast:          4     4     4     4     4
           % of mean:                   116% 

September  Mean:    2.8
2025       Prob. level:      90    75    50    25    10
           Forecast:          3     3     3     3     4
           % of mean:                    99% 

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

Water Year Obs-To-Date:  408.3    Mean:  289.5
WY2025     Prob. level:      90    75    50    25    10
           Fcst Residual:    16    16    16    16    17
           Obs + Fcst:      424   424   424   425   426
           % of mean:                   147%