SLCESPCO
National Weather Service
Colorado Basin River Forecast Center
Salt Lake City, Utah
May 18, 2020

San Juan Basin Special Forecast Group

May mid-month Forecasts

Seasonal and Monthly forecasts
Forecast volumes in thousands of acre-feet (KAF)


Rio Blanco  FORECAST                   OBSERVED
              90%     50%     10%        Apr 
   Apr-Jul    26.0    31.0    38.0        6.2  


Navajo-Chromo  FORECAST                OBSERVED
              90%     50%     10%        Apr 
   Apr-Jul    28.0    33.0    38.0        6.3  


Little Navajo-Chromo  FORECAST         OBSERVED
              90%     50%     10%        Apr 
   Apr-Jul     2.7     3.2     3.7        0.7  
       May     1.7     2.0     2.2
       Jun     0.2     0.3     0.5
       Jul     0.1     0.2     0.3


Vallecito Reservoir  FORECAST          OBSERVED
              90%     50%     10%        Apr 
   Apr-Jul   117.0   130.0   161.0       15.9  
       May    62.0    68.0    73.0
       Jun    28.0    32.0    49.0
       Jul    11.0    14.0    23.0


Navajo Reservoir  FORECAST             OBSERVED
              90%     50%     10%        Apr 
   Apr-Jul   320.0   365.0   435.0       80.0  
       May   196.0   210.0   230.0
       Jun    42.0    65.0    95.0
       Jul     2.0    10.0    30.0


Animas-Durango  FORECAST              OBSERVED
              90%     50%     10%        Apr 
   Apr-Jul   212.0   260.0   317.0       27.0  
       May   110.0   128.0   132.0
       Jun    55.0    74.0   105.0
       Jul    20.0    31.0    53.0


Lemon Reservoir  FORECAST            OBSERVED
              90%     50%     10%        Apr 
   Apr-Jul    28.0    34.0    45.0        2.6  
       May    16.0    20.0    23.0
       Jun     7.0     8.0    14.0
       Jul     2.4     3.4     5.4