USDA NRCS National Water & Climate Center
 * - DATA CURRENT AS OF: March 24, 2023 12:10:13 PM
   - Based on April 01, 2023 forecast values



LAKE TAHOE BASIN
                                                    50%  % of   max    30%    70%    min   30-yr
Forecast Point                            period   (KAF)  med  (KAF)  (KAF)  (KAF)  (KAF)   med
--------------                            ------   ----- ----  -----  -----  -----  -----  -----
Lake Tahoe Rise (Gates Closed) (1) (ft)*  APR-HIGH   2.9  250    3.9    3.2    2.6    2.2   1.16
                                     

TRUCKEE RIVER BASIN
                                                    50%  % of   max    30%    70%    min   30-yr
Forecast Point                            period   (KAF)  med  (KAF)  (KAF)  (KAF)  (KAF)   med
--------------                            ------   ----- ----  -----  -----  -----  -----  -----
L Truckee R ab Boca Reservoir (2)*        APR-JUL    200  278    240    210    190    165     72
Truckee R at Farad (2)*                   APR-JUL    560  249    675    600    510    460    225


CARSON RIVER BASIN
                                                    50%  % of   max    30%    70%    min   30-yr
Forecast Point                            period   (KAF)  med  (KAF)  (KAF)  (KAF)  (KAF)   med
--------------                            ------   ----- ----  -----  -----  -----  -----  -----
Carson R at Ft Churchill*                 APR-JUL    560  427    650    580    540    510    131



 Max (10%), 30%, 50%, 70% and Min (90%) chance that actual volume will exceed forecast.
 Medians are for the 1991-2020 period.
 All volumes are in thousands of acre-feet.

 footnotes:
 1) Max and Min are 5% and 95% chance that actual volume will exceed forecast
 2) streamflow is adjusted for upstream storage


* These forecasts are coordinated. Hydrologists with the NRCS and National Weather Service
California Nevada River Forecast Center (CNRFC) coordinate Lake Tahoe Rise, Truckee River at Farad, 
Little Truckee River above Boca, and the Carson River near Ft. Churchill using output of their respective 
hydrology models at the request of the Bureau of Reclamation. The NRCS model is a statistical model based 
on the current data as of the first of each month. The CNRFC ensemble forecasting system incorporates 
near-term weather prediction and climatology into their model. These models can provide different answers 
because of the nature of the model systems, and from the inclusion of future weather in the CNRFC model. 
The hydrologists agree on forecast values using guidance from both models to best provide an accurate 
water supply forecast for these points.