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: 06/16/2025 1408Z
Data ending: 06/16/2025 12Z
* All units are in thousands of acre-feet.

Station: WHSC1 (Clear Ck - Whiskeytown Res)

MONTHLY DATA

October    Obs:    4.7  Mean:    4.0  WY-to-date: Obs:    4.7 Mean:    4.0
2024       % of mean:    119% 

November   Obs:   23.9  Mean:   10.1  WY-to-date: Obs:   28.6 Mean:   14.1
2024       % of mean:    236% 

December   Obs:   57.8  Mean:   28.8  WY-to-date: Obs:   86.4 Mean:   42.9
2024       % of mean:    201% 

January    Obs:   32.7  Mean:   46.8  WY-to-date: Obs:  119.1 Mean:   89.7
2025       % of mean:    70% 

February   Obs:   83.9  Mean:   55.3  WY-to-date: Obs:  202.9 Mean:  144.4
2025       % of mean:    152% 

March      Obs:   52.0  Mean:   60.0  WY-to-date: Obs:  254.9 Mean:  204.4
2025       % of mean:    87% 

April      Obs:   37.9  Mean:   36.4  WY-to-date: Obs:  292.9 Mean:  240.8
2025       % of mean:    104% 

May        Obs:   13.8  Mean:   21.5  WY-to-date: Obs:  306.6 Mean:  262.3
2025       % of mean:    64% 

June       Obs (thru 16@12Z):    7.2    Mean:    9.8  WY-to-date: Obs:  313.8 Mean:  269.2
2025       Prob. level:      90    75    50    25    10
           Fcst Residual:     4     4     4     4     4
           Obs + Fcst:       11    11    11    11    11
           % of mean:                   112% 

July       Mean:    4.2
2025       Prob. level:      90    75    50    25    10
           Forecast:          6     6     6     6     6
           % of mean:                   132% 

August     Mean:    2.8
2025       Prob. level:      90    75    50    25    10
           Forecast:          3     3     4     4     4
           % of mean:                   124% 

September  Mean:    2.7
2025       Prob. level:      90    75    50    25    10
           Forecast:          2     2     2     3     3
           % of mean:                    83% 

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

Water Year Obs-To-Date:  313.8    Mean:  282.5
WY2025     Prob. level:      90    75    50    25    10
           Fcst Residual:    15    15    15    15    16
           Obs + Fcst:      329   329   329   329   330
           % of mean:                   116%