SLCESPCO
National Weather Service
Colorado Basin River Forecast Center
Salt Lake City, Utah
July 15, 2020

San Juan Basin Special Forecast Group

July mid-month Forecasts

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


Rio Blanco  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun 
   Apr-Jul    28.0    28.0    29.0        6.2    15.9     4.9  


Navajo-Chromo  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun 
   Apr-Jul    33.0    33.0    34.0        6.3    16.7     7.6  


Little Navajo-Chromo  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun 
   Apr-Jul     2.7     2.7     2.7        0.7     1.6     0.3  
       Jul     0.1     0.1     0.2
       Aug     0.1     0.1     0.3
       Sep     0.1     0.2     0.4


Vallecito Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun 
   Apr-Jul   129.0   130.0   132.0       15.9    66.0    38.0  
       Jul     9.1    10.1    12.1
       Aug     8.0    12.0    19.0
       Sep     8.0    11.0    23.0


Navajo Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun 
   Apr-Jul   344.0   345.0   350.0       80.0   199.0    65.0  
       Jul     0.0     1.0     6.0
       Aug     2.0    10.0    35.0
       Sep     8.0    20.0    50.0


Animas-Durango  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun 
   Apr-Jul   259.0   260.0   266.0       27.0   120.0    90.0  
       Jul    22.0    23.0    29.0
       Aug    16.0    19.0    34.0
       Sep    13.0    20.0    40.0


Lemon Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun 
   Apr-Jul    31.0    31.0    32.0        2.6    18.9     7.8  
       Jul     1.7     1.7     2.7
       Aug     1.3     2.5     4.5
       Sep     1.4     2.5     5.0