SLCESPCO
National Weather Service
Colorado Basin River Forecast Center
Salt Lake City, Utah
June 03, 2021

San Juan Basin Special Forecast Group

June final Forecasts

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


Rio Blanco  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May 
   Apr-Jul    30.0    34.0    38.0        7.7    14.6  


Navajo-Chromo  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May 
   Apr-Jul    34.0    39.0    44.0        8.4    16.1  


Little Navajo-Chromo  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May 
   Apr-Jul     3.1     3.3     3.5        1.1     1.7  
       Jun    0.20    0.35    0.50
       Jul    0.10    0.15    0.20
       Aug    0.10    0.20    0.30


Vallecito Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May 
   Apr-Jul    95.0   110.0   127.0       13.6    50.0  
       Jun    23.0    34.0    43.0
       Jul     8.4    12.4    20.0
       Aug     7.0    10.0    19.0


Navajo Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May 
   Apr-Jul   300.0   335.0   380.0       81.0   169.0  
       Jun    49.0    75.0   102.0
       Jul     1.0    10.0    28.0
       Aug    10.0    20.0    40.0


Animas-Durango  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May 
   Apr-Jul   147.0   176.0   210.0       17.9    72.0  
       Jun    43.0    64.0    84.0
       Jul    14.1    22.1    36.0
       Aug    12.0    16.1    30.0


Lemon Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May 
   Apr-Jul    22.0    25.0    29.0        2.5    13.6  
       Jun     4.6     6.8     8.5
       Jul     1.3     2.1     4.4
       Aug     1.1     2.0     4.5