Extended Streamflow Prediction
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000
FGUS65 KSTR 162024
ESPCO
National Weather Service
Colorado Basin River Forecast Center
Salt Lake City, Utah
July 15, 2021

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    32.0    33.0    35.0        7.7    14.6     8.4


Navajo-Chromo  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun
   Apr-Jul    41.0    42.0    43.0        8.4    16.1    14.0


Little Navajo-Chromo  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun
   Apr-Jul     3.3     3.34    3.5        1.1     1.7     0.44
       Jul     0.06    0.1     0.2
       Aug     0.1     0.2     0.3
       Sep     0.1     0.2     0.4


Vallecito Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun
   Apr-Jul   119.0   122.0   128.0       13.6    50.0    44.0
       Jul    11.0    14.4    20.0
       Aug     8.0    11.0    24.0
       Sep     7.0    12.0    26.0


Navajo Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun
   Apr-Jul   362.0   365.0   374.0       82.0   169.0   103.0
       Jul     8.0    11.0    20.0
       Aug     5.0    17.0    40.0
       Sep    18.0    25.0    60.0


Animas-Durango  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun
   Apr-Jul   202.0   203.0   211.0       17.9    72.0    89.0
       Jul    23.0    24.0    32.0
       Aug    13.0    17.0    33.0
       Sep    10.0    17.0    39.0


Lemon Reservoir  FORECAST                   OBSERVED
              90%     50%     10%        Apr     May     Jun
   Apr-Jul    27.1    28.0    29.1        2.5    13.6     8.8
       Jul     2.2     2.8     4.2
       Aug     1.1     2.0     5.0
       Sep     1.2     2.3     6.0


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