Streamflow
All the following yields are based on the fifty percent chance April
through September yield. Yield for the North Platte River near Northgate
is expected to be about 282,000 acre-feet (104 percent of average).
Encampment River near Encampment is estimated to yield 117,000 acre-feet
(75 percent of normal). North Platte River near Sinclair will yield about
656,000 acre-feet (91 percent of normal). Rock Creek near Arlington is
estimated to yield 38,000 acre-feet (68 percent of average). Medicine Bow
River above Seminoe Reservoir is expected to yield about 70,000 acre-feet
(55 percent of normal). Seminoe Reservoir inflow should be about (731,000
acre-feet (86 percent of normal). See the following table for more
detailed information on projected runoff.
================================================================================================================================== UPPER NORTH PLATTE RIVER BASIN Streamflow Forecasts - April 1, 2000 ================================================================================================================================== | <<====== Drier ====== Future Conditions ======= Wetter =====>> | | | Forecast Point Forecast | ==================== Chance Of Exceeding * ====================== | Period | 90% 70% | 50% (Most Probable) | 30% 10% | 30-Yr Avg. | (1000AF) (1000AF) | (1000AF) (% AVG.) | (1000AF) (1000AF) | (1000AF) ====================================================================|=======================|===================================== North Platte River nr Northgate APR-SEP 184 242 | 282 104 | 322 380 271 | | Encampment River nr Encampment APR-SEP 79 102 | 117 75 | 132 155 156 | | North Platte River nr Sinclair APR-SEP 420 561 | 656 91 | 751 892 719 | | Rock Creek nr Arlington APR-SEP 27 33 | 38 68 | 43 51 56 | | Medicine Bow River ab Seminoe Reserv APR-SEP 25 49 | 70 55 | 94 137 127 | | Seminoe Reservoir inflow APR-JUL 415 569 | 673 85 | 777 931 788 APR-SEP 452 618 | 731 86 | 844 1010 851 | | ================================================================================================================================== UPPER NORTH PLATTE RIVER BASIN | UPPER NORTH PLATTE RIVER BASIN Reservoir Storage (1000 AF) - End of March | Watershed Snowpack Analysis - April 1, 2000 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= SEMINOE 1016.7 743.0 673.8 368.0 | N PLATTE above Northgate 8 121 105 | | ENCAMPMENT RIVER 1 83 96 | | BRUSH CREEK 3 95 77 | | MEDICINE BOW & ROCK CREEK 1 103 63 | | N PLATTE above Seminoe 12 113 98 | ================================================================================================================================== * 90%, 70%, 30%, and 10% chances of exceeding are the probabilities that the actual volume will exceed the volumes in the table. The average is computed for the 1961-1990 base period. (1) - The values listed under the 10% and 90% Chance of Exceeding are actually 5% and 95% exceedance levels. (2) - The value is natural volume - actual volume may be affected by upstream water management.